// (C) 2001 Ximian, Inc.
//
//
+#define USE_OLD
namespace Mono.CSharp {
using System;
public class Unary : Expression {
public enum Operator : byte {
UnaryPlus, UnaryNegation, LogicalNot, OnesComplement,
- Indirection, AddressOf,
+ Indirection, AddressOf, TOP
}
Operator oper;
/// <summary>
/// Returns a stringified representation of the Operator
/// </summary>
- string OperName ()
+ static public string OperName (Operator oper)
{
switch (oper){
case Operator.UnaryPlus:
return oper.ToString ();
}
- void error23 (Type t)
+ static string [] oper_names;
+
+ static Unary ()
+ {
+ oper_names = new string [(int)Operator.TOP];
+
+ oper_names [(int) Operator.UnaryPlus] = "op_UnaryPlus";
+ oper_names [(int) Operator.UnaryNegation] = "op_UnaryNegation";
+ oper_names [(int) Operator.LogicalNot] = "op_LogicalNot";
+ oper_names [(int) Operator.OnesComplement] = "op_OnesComplement";
+ oper_names [(int) Operator.Indirection] = "op_Indirection";
+ oper_names [(int) Operator.AddressOf] = "op_AddressOf";
+ }
+
+ void Error23 (Type t)
{
Report.Error (
- 23, loc, "Operator " + OperName () +
+ 23, loc, "Operator " + OperName (oper) +
" cannot be applied to operand of type `" +
TypeManager.CSharpName (t) + "'");
}
+ /// <remarks>
+ /// The result has been already resolved:
+ ///
+ /// FIXME: a minus constant -128 sbyte cant be turned into a
+ /// constant byte.
+ /// </remarks>
static Expression TryReduceNegative (Expression expr)
{
Expression e = null;
- if (expr is IntLiteral)
- e = new IntLiteral (-((IntLiteral) expr).Value);
- else if (expr is UIntLiteral)
- e = new LongLiteral (-((UIntLiteral) expr).Value);
- else if (expr is LongLiteral)
- e = new LongLiteral (-((LongLiteral) expr).Value);
- else if (expr is FloatLiteral)
- e = new FloatLiteral (-((FloatLiteral) expr).Value);
- else if (expr is DoubleLiteral)
- e = new DoubleLiteral (-((DoubleLiteral) expr).Value);
- else if (expr is DecimalLiteral)
- e = new DecimalLiteral (-((DecimalLiteral) expr).Value);
+ if (expr is IntConstant)
+ e = new IntConstant (-((IntConstant) expr).Value);
+ else if (expr is UIntConstant)
+ e = new LongConstant (-((UIntConstant) expr).Value);
+ else if (expr is LongConstant)
+ e = new LongConstant (-((LongConstant) expr).Value);
+ else if (expr is FloatConstant)
+ e = new FloatConstant (-((FloatConstant) expr).Value);
+ else if (expr is DoubleConstant)
+ e = new DoubleConstant (-((DoubleConstant) expr).Value);
+ else if (expr is DecimalConstant)
+ e = new DecimalConstant (-((DecimalConstant) expr).Value);
+ else if (expr is ShortConstant)
+ e = new IntConstant (-((ShortConstant) expr).Value);
+ else if (expr is UShortConstant)
+ e = new IntConstant (-((UShortConstant) expr).Value);
return e;
}
+ Expression Reduce (EmitContext ec, Expression e)
+ {
+ Type expr_type = e.Type;
+
+ switch (oper){
+ case Operator.UnaryPlus:
+ return e;
+
+ case Operator.UnaryNegation:
+ return TryReduceNegative (e);
+
+ case Operator.LogicalNot:
+ if (expr_type != TypeManager.bool_type) {
+ Error23 (expr_type);
+ return null;
+ }
+
+ BoolConstant b = (BoolConstant) e;
+ return new BoolConstant (!(b.Value));
+
+ case Operator.OnesComplement:
+ if (!((expr_type == TypeManager.int32_type) ||
+ (expr_type == TypeManager.uint32_type) ||
+ (expr_type == TypeManager.int64_type) ||
+ (expr_type == TypeManager.uint64_type) ||
+ (expr_type.IsSubclassOf (TypeManager.enum_type)))){
+ Error23 (expr_type);
+ return null;
+ }
+
+ if (e is EnumConstant){
+ EnumConstant enum_constant = (EnumConstant) e;
+
+ Expression reduced = Reduce (ec, enum_constant.Child);
+
+ return new EnumConstant ((Constant) reduced, enum_constant.Type);
+ }
+
+ if (expr_type == TypeManager.int32_type)
+ return new IntConstant (~ ((IntConstant) e).Value);
+ if (expr_type == TypeManager.uint32_type)
+ return new UIntConstant (~ ((UIntConstant) e).Value);
+ if (expr_type == TypeManager.int64_type)
+ return new LongConstant (~ ((LongConstant) e).Value);
+ if (expr_type == TypeManager.uint64_type)
+ return new ULongConstant (~ ((ULongConstant) e).Value);
+
+ Error23 (expr_type);
+ return null;
+ }
+ throw new Exception ("Can not constant fold");
+ }
+
Expression ResolveOperator (EmitContext ec)
{
Type expr_type = expr.Type;
Expression mg;
string op_name;
- op_name = "op_" + oper;
+ op_name = oper_names [(int) oper];
- mg = MemberLookup (ec, expr_type, op_name, false, loc);
-
- if (mg == null && expr_type.BaseType != null)
- mg = MemberLookup (ec, expr_type.BaseType, op_name, false, loc);
+ mg = MemberLookup (ec, expr_type, op_name, MemberTypes.Method, AllBindingFlags, loc);
if (mg != null) {
Expression e = StaticCallExpr.MakeSimpleCall (
ec, (MethodGroupExpr) mg, expr, loc);
if (e == null){
- error23 (expr_type);
+ Error23 (expr_type);
return null;
}
return e;
}
- //
- // Step 2: Default operations on CLI native types.
- //
-
// Only perform numeric promotions on:
// +, -
if (expr_type == null)
return null;
+ //
+ // Step 2: Default operations on CLI native types.
+ //
+ if (expr is Constant)
+ return Reduce (ec, expr);
+
if (oper == Operator.LogicalNot){
if (expr_type != TypeManager.bool_type) {
- error23 (expr.Type);
+ Error23 (expr.Type);
return null;
}
(expr_type == TypeManager.int64_type) ||
(expr_type == TypeManager.uint64_type) ||
(expr_type.IsSubclassOf (TypeManager.enum_type)))){
- error23 (expr.Type);
+ Error23 (expr.Type);
return null;
}
type = expr_type;
// decimal operator- (decimal d)
//
if (oper == Operator.UnaryNegation){
- //
- // Fold a "- Constant" into a negative constant
- //
-
Expression e = null;
//
- // Is this a constant?
- //
- e = TryReduceNegative (expr);
-
- if (e != null){
- e = e.Resolve (ec);
- return e;
- }
-
- //
- // Not a constant we can optimize, perform numeric
- // promotions to int, long, double.
+ // perform numeric promotions to int,
+ // long, double.
//
//
// The following is inneficient, because we call
//
// FIXME: handle exception to this rule that
// permits the int value -2147483648 (-2^31) to
- // bt written as a decimal interger literal
+ // bt wrote as a decimal interger literal
//
type = TypeManager.int64_type;
expr = ConvertImplicit (ec, expr, type, loc);
if (expr_type == TypeManager.uint64_type){
//
// FIXME: Handle exception of `long value'
- // -92233720368547758087 (-2^63) to be written as
+ // -92233720368547758087 (-2^63) to be wrote as
// decimal integer literal.
//
- error23 (expr_type);
+ Error23 (expr_type);
return null;
}
+ if (expr_type == TypeManager.float_type){
+ type = expr_type;
+ return this;
+ }
+
e = ConvertImplicit (ec, expr, TypeManager.int32_type, loc);
if (e != null){
expr = e;
return this;
}
- error23 (expr_type);
+ Error23 (expr_type);
return null;
}
if (oper == Operator.AddressOf){
- if (expr.ExprClass != ExprClass.Variable){
+ if (expr.eclass != ExprClass.Variable){
Error (211, loc, "Cannot take the address of non-variables");
return null;
}
- type = Type.GetType (expr.Type.ToString () + "*");
+ if (!ec.InUnsafe) {
+ UnsafeError (loc);
+ return null;
+ }
+
+ if (!TypeManager.VerifyUnManaged (expr.Type, loc)){
+ return null;
+ }
+
+ //
+ // This construct is needed because dynamic types
+ // are not known by Type.GetType, so we have to try then to use
+ // ModuleBuilder.GetType.
+ //
+ string ptr_type_name = expr.Type.FullName + "*";
+ type = Type.GetType (ptr_type_name);
+ if (type == null)
+ type = RootContext.ModuleBuilder.GetType (ptr_type_name);
+
return this;
}
+
+ if (oper == Operator.Indirection){
+ if (!ec.InUnsafe){
+ UnsafeError (loc);
+ return null;
+ }
+
+ if (!expr_type.IsPointer){
+ Report.Error (
+ 193, loc,
+ "The * or -> operator can only be applied to pointers");
+ return null;
+ }
+
+ //
+ // We create an Indirection expression, because
+ // it can implement the IMemoryLocation.
+ //
+ return new Indirection (expr);
+ }
- Error (187, loc, "No such operator '" + OperName () + "' defined for type '" +
+ Error (187, loc, "No such operator '" + OperName (oper) + "' defined for type '" +
TypeManager.CSharpName (expr_type) + "'");
return null;
}
break;
case Operator.AddressOf:
- ((IMemoryLocation)expr).AddressOf (ec);
+ ((IMemoryLocation)expr).AddressOf (ec, AddressOp.LoadStore);
break;
- case Operator.Indirection:
- throw new Exception ("Not implemented yet");
-
default:
throw new Exception ("This should not happen: Operator = "
+ oper.ToString ());
expr.Emit (ec);
}
+
+ public override string ToString ()
+ {
+ return "Unary (" + oper + ", " + expr + ")";
+ }
+
+ }
+
+ //
+ // Unary operators are turned into Indirection expressions
+ // after semantic analysis (this is so we can take the address
+ // of an indirection).
+ //
+ public class Indirection : Expression, IMemoryLocation, IAssignMethod {
+ Expression expr;
- public override Expression Reduce (EmitContext ec)
+ public Indirection (Expression expr)
+ {
+ this.expr = expr;
+ this.type = expr.Type.GetElementType ();
+ eclass = ExprClass.Variable;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ expr.Emit (ec);
+ LoadFromPtr (ec.ig, Type, false);
+ }
+
+ public void EmitAssign (EmitContext ec, Expression source)
+ {
+ expr.Emit (ec);
+ source.Emit (ec);
+ StoreFromPtr (ec.ig, type);
+ }
+
+ public void AddressOf (EmitContext ec, AddressOp Mode)
+ {
+ expr.Emit (ec);
+ }
+
+ public override Expression DoResolve (EmitContext ec)
{
- Expression e;
-
//
- // First, reduce our child. Note that although we handle
+ // Born fully resolved
//
- expr = expr.Reduce (ec);
- if (!(expr is Literal))
- return expr;
-
- switch (oper){
- case Operator.UnaryPlus:
- return expr;
-
- case Operator.UnaryNegation:
- e = TryReduceNegative (expr);
- if (e == null)
- break;
- return e;
-
- case Operator.LogicalNot:
- BoolLiteral b = (BoolLiteral) expr;
-
- return new BoolLiteral (!(b.Value));
-
- case Operator.OnesComplement:
- Type et = expr.Type;
-
- if (et == TypeManager.int32_type)
- return new IntLiteral (~ ((IntLiteral) expr).Value);
- if (et == TypeManager.uint32_type)
- return new UIntLiteral (~ ((UIntLiteral) expr).Value);
- if (et == TypeManager.int64_type)
- return new LongLiteral (~ ((LongLiteral) expr).Value);
- if (et == TypeManager.uint64_type)
- return new ULongLiteral (~ ((ULongLiteral) expr).Value);
- break;
- }
return this;
}
}
-
+
/// <summary>
/// Unary Mutator expressions (pre and post ++ and --)
/// </summary>
expr = e;
}
- string OperName ()
+ static string OperName (Mode mode)
{
return (mode == Mode.PreIncrement || mode == Mode.PostIncrement) ?
"++" : "--";
}
- void error23 (Type t)
+ void Error23 (Type t)
{
Report.Error (
- 23, loc, "Operator " + OperName () +
+ 23, loc, "Operator " + OperName (mode) +
" cannot be applied to operand of type `" +
TypeManager.CSharpName (t) + "'");
}
(t == TypeManager.char_type) ||
(t.IsSubclassOf (TypeManager.enum_type)) ||
(t == TypeManager.float_type) ||
- (t == TypeManager.double_type);
+ (t == TypeManager.double_type) ||
+ (t.IsPointer && t != TypeManager.void_ptr_type);
}
Expression ResolveOperator (EmitContext ec)
else
op_name = "op_Decrement";
- mg = MemberLookup (ec, expr_type, op_name, false, loc);
+ mg = MemberLookup (ec, expr_type, op_name, MemberTypes.Method, AllBindingFlags, loc);
if (mg == null && expr_type.BaseType != null)
- mg = MemberLookup (ec, expr_type.BaseType, op_name, false, loc);
+ mg = MemberLookup (ec, expr_type.BaseType, op_name,
+ MemberTypes.Method, AllBindingFlags, loc);
if (mg != null) {
method = StaticCallExpr.MakeSimpleCall (
// a property access or an indexer access
//
type = expr_type;
- if (expr.ExprClass == ExprClass.Variable){
+ if (expr.eclass == ExprClass.Variable){
if (IsIncrementableNumber (expr_type) ||
expr_type == TypeManager.decimal_type){
return this;
}
- } else if (expr.ExprClass == ExprClass.IndexerAccess){
+ } else if (expr.eclass == ExprClass.IndexerAccess){
IndexerAccess ia = (IndexerAccess) expr;
temp_storage = new LocalTemporary (ec, expr.Type);
return null;
return this;
- } else if (expr.ExprClass == ExprClass.PropertyAccess){
+ } else if (expr.eclass == ExprClass.PropertyAccess){
PropertyExpr pe = (PropertyExpr) expr;
if (pe.VerifyAssignable ())
return null;
}
- Error (187, loc, "No such operator '" + OperName () + "' defined for type '" +
+ Error (187, loc, "No such operator '" + OperName (mode) + "' defined for type '" +
TypeManager.CSharpName (expr_type) + "'");
return null;
}
eclass = ExprClass.Value;
return ResolveOperator (ec);
}
-
+ static int PtrTypeSize (Type t)
+ {
+ return GetTypeSize (t.GetElementType ());
+ }
+
+
//
// FIXME: We need some way of avoiding the use of temp_storage
// for some types of storage (parameters, local variables,
{
ILGenerator ig = ec.ig;
IAssignMethod ia = (IAssignMethod) expr;
-
- if (temp_storage == null)
- temp_storage = new LocalTemporary (ec, expr.Type);
+ Type expr_type = expr.Type;
+ if (temp_storage == null)
+ temp_storage = new LocalTemporary (ec, expr_type);
+
switch (mode){
case Mode.PreIncrement:
case Mode.PreDecrement:
if (method == null){
expr.Emit (ec);
- ig.Emit (OpCodes.Ldc_I4_1);
+ if (expr_type == TypeManager.uint64_type ||
+ expr_type == TypeManager.int64_type)
+ ig.Emit (OpCodes.Ldc_I8, 1L);
+ else if (expr_type == TypeManager.double_type)
+ ig.Emit (OpCodes.Ldc_R8, 1.0);
+ else if (expr_type == TypeManager.float_type)
+ ig.Emit (OpCodes.Ldc_R4, 1.0F);
+ else if (expr_type.IsPointer){
+ int n = PtrTypeSize (expr_type);
+
+ if (n == 0)
+ ig.Emit (OpCodes.Sizeof, expr_type);
+ else
+ IntConstant.EmitInt (ig, n);
+ } else
+ ig.Emit (OpCodes.Ldc_I4_1);
if (mode == Mode.PreDecrement)
ig.Emit (OpCodes.Sub);
else
ig.Emit (OpCodes.Dup);
- ig.Emit (OpCodes.Ldc_I4_1);
+ if (expr_type == TypeManager.uint64_type ||
+ expr_type == TypeManager.int64_type)
+ ig.Emit (OpCodes.Ldc_I8, 1L);
+ else if (expr_type == TypeManager.double_type)
+ ig.Emit (OpCodes.Ldc_R8, 1.0);
+ else if (expr_type == TypeManager.float_type)
+ ig.Emit (OpCodes.Ldc_R4, 1.0F);
+ else if (expr_type.IsPointer){
+ int n = PtrTypeSize (expr_type);
+
+ if (n == 0)
+ ig.Emit (OpCodes.Sizeof, expr_type);
+ else
+ IntConstant.EmitInt (ig, n);
+ } else
+ ig.Emit (OpCodes.Ldc_I4_1);
if (mode == Mode.PostDecrement)
ig.Emit (OpCodes.Sub);
}
/// <summary>
- /// Implements the `is' and `as' tests.
+ /// Base class for the `Is' and `As' classes.
/// </summary>
///
/// <remarks>
/// FIXME: Split this in two, and we get to save the `Operator' Oper
/// size.
/// </remarks>
- public class Probe : Expression {
+ public abstract class Probe : Expression {
public readonly string ProbeType;
- public readonly Operator Oper;
- Expression expr;
- Type probe_type;
-
- public enum Operator : byte {
- Is, As
- }
+ protected Expression expr;
+ protected Type probe_type;
+ protected Location loc;
- public Probe (Operator oper, Expression expr, string probe_type)
+ public Probe (Expression expr, string probe_type, Location l)
{
- Oper = oper;
ProbeType = probe_type;
+ loc = l;
this.expr = expr;
}
return expr;
}
}
-
+
public override Expression DoResolve (EmitContext ec)
{
- probe_type = ec.TypeContainer.LookupType (ProbeType, false);
+ probe_type = RootContext.LookupType (ec.TypeContainer, ProbeType, false, loc);
if (probe_type == null)
return null;
expr = expr.Resolve (ec);
- type = TypeManager.bool_type;
- eclass = ExprClass.Value;
-
return this;
}
+ }
+
+ /// <summary>
+ /// Implementation of the `is' operator.
+ /// </summary>
+ public class Is : Probe {
+ public Is (Expression expr, string probe_type, Location l)
+ : base (expr, probe_type, l)
+ {
+ }
public override void Emit (EmitContext ec)
{
expr.Emit (ec);
- if (Oper == Operator.Is){
- ig.Emit (OpCodes.Isinst, probe_type);
- ig.Emit (OpCodes.Ldnull);
- ig.Emit (OpCodes.Cgt_Un);
- } else {
- ig.Emit (OpCodes.Isinst, probe_type);
- }
+ ig.Emit (OpCodes.Isinst, probe_type);
+ ig.Emit (OpCodes.Ldnull);
+ ig.Emit (OpCodes.Cgt_Un);
}
+
+ public override Expression DoResolve (EmitContext ec)
+ {
+ Expression e = base.DoResolve (ec);
+
+ if (e == null)
+ return null;
+
+ if (RootContext.WarningLevel >= 1){
+ if (expr.Type == probe_type || expr.Type.IsSubclassOf (probe_type)){
+ Report.Warning (
+ 183, loc,
+ "The expression is always of type `" +
+ TypeManager.CSharpName (probe_type) + "'");
+ }
+
+ if (expr.Type != probe_type && !probe_type.IsSubclassOf (expr.Type)){
+ if (!probe_type.IsInterface)
+ Report.Warning (
+ 184, loc,
+ "The expression is never of type `" +
+ TypeManager.CSharpName (probe_type) + "'");
+ }
+ }
+
+ type = TypeManager.bool_type;
+ eclass = ExprClass.Value;
+
+ return this;
+ }
}
+ /// <summary>
+ /// Implementation of the `as' operator.
+ /// </summary>
+ public class As : Probe {
+ public As (Expression expr, string probe_type, Location l)
+ : base (expr, probe_type, l)
+ {
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ ILGenerator ig = ec.ig;
+
+ expr.Emit (ec);
+ ig.Emit (OpCodes.Isinst, probe_type);
+ }
+
+ public override Expression DoResolve (EmitContext ec)
+ {
+ Expression e = base.DoResolve (ec);
+
+ if (e == null)
+ return null;
+
+ type = probe_type;
+ eclass = ExprClass.Value;
+
+ return this;
+ }
+ }
+
/// <summary>
/// This represents a typecast in the source language.
///
expr = value;
}
}
+
+ /// <summary>
+ /// Attempts to do a compile-time folding of a constant cast.
+ /// </summary>
+ Expression TryReduce (EmitContext ec, Type target_type)
+ {
+ if (expr is ByteConstant){
+ byte v = ((ByteConstant) expr).Value;
+
+ if (target_type == TypeManager.sbyte_type)
+ return new SByteConstant ((sbyte) v);
+ if (target_type == TypeManager.short_type)
+ return new ShortConstant ((short) v);
+ if (target_type == TypeManager.ushort_type)
+ return new UShortConstant ((ushort) v);
+ if (target_type == TypeManager.int32_type)
+ return new IntConstant ((int) v);
+ if (target_type == TypeManager.uint32_type)
+ return new UIntConstant ((uint) v);
+ if (target_type == TypeManager.int64_type)
+ return new LongConstant ((long) v);
+ if (target_type == TypeManager.uint64_type)
+ return new ULongConstant ((ulong) v);
+ if (target_type == TypeManager.float_type)
+ return new FloatConstant ((float) v);
+ if (target_type == TypeManager.double_type)
+ return new DoubleConstant ((double) v);
+ }
+ if (expr is SByteConstant){
+ sbyte v = ((SByteConstant) expr).Value;
+
+ if (target_type == TypeManager.byte_type)
+ return new ByteConstant ((byte) v);
+ if (target_type == TypeManager.short_type)
+ return new ShortConstant ((short) v);
+ if (target_type == TypeManager.ushort_type)
+ return new UShortConstant ((ushort) v);
+ if (target_type == TypeManager.int32_type)
+ return new IntConstant ((int) v);
+ if (target_type == TypeManager.uint32_type)
+ return new UIntConstant ((uint) v);
+ if (target_type == TypeManager.int64_type)
+ return new LongConstant ((long) v);
+ if (target_type == TypeManager.uint64_type)
+ return new ULongConstant ((ulong) v);
+ if (target_type == TypeManager.float_type)
+ return new FloatConstant ((float) v);
+ if (target_type == TypeManager.double_type)
+ return new DoubleConstant ((double) v);
+ }
+ if (expr is ShortConstant){
+ short v = ((ShortConstant) expr).Value;
+
+ if (target_type == TypeManager.byte_type)
+ return new ByteConstant ((byte) v);
+ if (target_type == TypeManager.sbyte_type)
+ return new SByteConstant ((sbyte) v);
+ if (target_type == TypeManager.ushort_type)
+ return new UShortConstant ((ushort) v);
+ if (target_type == TypeManager.int32_type)
+ return new IntConstant ((int) v);
+ if (target_type == TypeManager.uint32_type)
+ return new UIntConstant ((uint) v);
+ if (target_type == TypeManager.int64_type)
+ return new LongConstant ((long) v);
+ if (target_type == TypeManager.uint64_type)
+ return new ULongConstant ((ulong) v);
+ if (target_type == TypeManager.float_type)
+ return new FloatConstant ((float) v);
+ if (target_type == TypeManager.double_type)
+ return new DoubleConstant ((double) v);
+ }
+ if (expr is UShortConstant){
+ ushort v = ((UShortConstant) expr).Value;
+
+ if (target_type == TypeManager.byte_type)
+ return new ByteConstant ((byte) v);
+ if (target_type == TypeManager.sbyte_type)
+ return new SByteConstant ((sbyte) v);
+ if (target_type == TypeManager.short_type)
+ return new ShortConstant ((short) v);
+ if (target_type == TypeManager.int32_type)
+ return new IntConstant ((int) v);
+ if (target_type == TypeManager.uint32_type)
+ return new UIntConstant ((uint) v);
+ if (target_type == TypeManager.int64_type)
+ return new LongConstant ((long) v);
+ if (target_type == TypeManager.uint64_type)
+ return new ULongConstant ((ulong) v);
+ if (target_type == TypeManager.float_type)
+ return new FloatConstant ((float) v);
+ if (target_type == TypeManager.double_type)
+ return new DoubleConstant ((double) v);
+ }
+ if (expr is IntConstant){
+ int v = ((IntConstant) expr).Value;
+
+ if (target_type == TypeManager.byte_type)
+ return new ByteConstant ((byte) v);
+ if (target_type == TypeManager.sbyte_type)
+ return new SByteConstant ((sbyte) v);
+ if (target_type == TypeManager.short_type)
+ return new ShortConstant ((short) v);
+ if (target_type == TypeManager.ushort_type)
+ return new UShortConstant ((ushort) v);
+ if (target_type == TypeManager.uint32_type)
+ return new UIntConstant ((uint) v);
+ if (target_type == TypeManager.int64_type)
+ return new LongConstant ((long) v);
+ if (target_type == TypeManager.uint64_type)
+ return new ULongConstant ((ulong) v);
+ if (target_type == TypeManager.float_type)
+ return new FloatConstant ((float) v);
+ if (target_type == TypeManager.double_type)
+ return new DoubleConstant ((double) v);
+ }
+ if (expr is UIntConstant){
+ uint v = ((UIntConstant) expr).Value;
+
+ if (target_type == TypeManager.byte_type)
+ return new ByteConstant ((byte) v);
+ if (target_type == TypeManager.sbyte_type)
+ return new SByteConstant ((sbyte) v);
+ if (target_type == TypeManager.short_type)
+ return new ShortConstant ((short) v);
+ if (target_type == TypeManager.ushort_type)
+ return new UShortConstant ((ushort) v);
+ if (target_type == TypeManager.int32_type)
+ return new IntConstant ((int) v);
+ if (target_type == TypeManager.int64_type)
+ return new LongConstant ((long) v);
+ if (target_type == TypeManager.uint64_type)
+ return new ULongConstant ((ulong) v);
+ if (target_type == TypeManager.float_type)
+ return new FloatConstant ((float) v);
+ if (target_type == TypeManager.double_type)
+ return new DoubleConstant ((double) v);
+ }
+ if (expr is LongConstant){
+ long v = ((LongConstant) expr).Value;
+
+ if (target_type == TypeManager.byte_type)
+ return new ByteConstant ((byte) v);
+ if (target_type == TypeManager.sbyte_type)
+ return new SByteConstant ((sbyte) v);
+ if (target_type == TypeManager.short_type)
+ return new ShortConstant ((short) v);
+ if (target_type == TypeManager.ushort_type)
+ return new UShortConstant ((ushort) v);
+ if (target_type == TypeManager.int32_type)
+ return new IntConstant ((int) v);
+ if (target_type == TypeManager.uint32_type)
+ return new UIntConstant ((uint) v);
+ if (target_type == TypeManager.uint64_type)
+ return new ULongConstant ((ulong) v);
+ if (target_type == TypeManager.float_type)
+ return new FloatConstant ((float) v);
+ if (target_type == TypeManager.double_type)
+ return new DoubleConstant ((double) v);
+ }
+ if (expr is ULongConstant){
+ ulong v = ((ULongConstant) expr).Value;
+
+ if (target_type == TypeManager.byte_type)
+ return new ByteConstant ((byte) v);
+ if (target_type == TypeManager.sbyte_type)
+ return new SByteConstant ((sbyte) v);
+ if (target_type == TypeManager.short_type)
+ return new ShortConstant ((short) v);
+ if (target_type == TypeManager.ushort_type)
+ return new UShortConstant ((ushort) v);
+ if (target_type == TypeManager.int32_type)
+ return new IntConstant ((int) v);
+ if (target_type == TypeManager.uint32_type)
+ return new UIntConstant ((uint) v);
+ if (target_type == TypeManager.int64_type)
+ return new LongConstant ((long) v);
+ if (target_type == TypeManager.float_type)
+ return new FloatConstant ((float) v);
+ if (target_type == TypeManager.double_type)
+ return new DoubleConstant ((double) v);
+ }
+ if (expr is FloatConstant){
+ float v = ((FloatConstant) expr).Value;
+
+ if (target_type == TypeManager.byte_type)
+ return new ByteConstant ((byte) v);
+ if (target_type == TypeManager.sbyte_type)
+ return new SByteConstant ((sbyte) v);
+ if (target_type == TypeManager.short_type)
+ return new ShortConstant ((short) v);
+ if (target_type == TypeManager.ushort_type)
+ return new UShortConstant ((ushort) v);
+ if (target_type == TypeManager.int32_type)
+ return new IntConstant ((int) v);
+ if (target_type == TypeManager.uint32_type)
+ return new UIntConstant ((uint) v);
+ if (target_type == TypeManager.int64_type)
+ return new LongConstant ((long) v);
+ if (target_type == TypeManager.uint64_type)
+ return new ULongConstant ((ulong) v);
+ if (target_type == TypeManager.double_type)
+ return new DoubleConstant ((double) v);
+ }
+ if (expr is DoubleConstant){
+ double v = ((DoubleConstant) expr).Value;
+
+ if (target_type == TypeManager.byte_type)
+ return new ByteConstant ((byte) v);
+ if (target_type == TypeManager.sbyte_type)
+ return new SByteConstant ((sbyte) v);
+ if (target_type == TypeManager.short_type)
+ return new ShortConstant ((short) v);
+ if (target_type == TypeManager.ushort_type)
+ return new UShortConstant ((ushort) v);
+ if (target_type == TypeManager.int32_type)
+ return new IntConstant ((int) v);
+ if (target_type == TypeManager.uint32_type)
+ return new UIntConstant ((uint) v);
+ if (target_type == TypeManager.int64_type)
+ return new LongConstant ((long) v);
+ if (target_type == TypeManager.uint64_type)
+ return new ULongConstant ((ulong) v);
+ if (target_type == TypeManager.float_type)
+ return new FloatConstant ((float) v);
+ }
+
+ return null;
+ }
public override Expression DoResolve (EmitContext ec)
{
if (target_type == null)
return null;
- if (target_type.ExprClass != ExprClass.Type){
+ if (target_type.eclass != ExprClass.Type){
report118 (loc, target_type, "class");
return null;
}
if (type == null)
return null;
+ if (expr is Constant){
+ Expression e = TryReduce (ec, type);
+
+ if (e != null)
+ return e;
+ }
+
expr = ConvertExplicit (ec, expr, type, loc);
return expr;
}
MethodBase method;
ArrayList Arguments;
Location loc;
-
+
+ bool DelegateOperation;
public Binary (Operator oper, Expression left, Expression right, Location loc)
{
/// <summary>
/// Returns a stringified representation of the Operator
/// </summary>
- string OperName ()
+ static string OperName (Operator oper)
{
switch (oper){
case Operator.Multiply:
return ConvertImplicit (ec, expr, target_type, new Location (-1));
}
-
+
+ public static void Error_OperatorAmbiguous (Location loc, Operator oper, Type l, Type r)
+ {
+ Report.Error (
+ 34, loc, "Operator `" + OperName (oper)
+ + "' is ambiguous on operands of type `"
+ + TypeManager.CSharpName (l) + "' "
+ + "and `" + TypeManager.CSharpName (r)
+ + "'");
+ }
+
//
// Note that handling the case l == Decimal || r == Decimal
// is taken care of by the Step 1 Operator Overload resolution.
type = TypeManager.double_type;
} else if (l == TypeManager.float_type || r == TypeManager.float_type){
//
- // if either operand is of type float, th eother operand is
- // converd to type float.
+ // if either operand is of type float, the other operand is
+ // converted to type float.
//
if (r != TypeManager.double_type)
right = ConvertImplicit (ec, right, TypeManager.float_type, loc);
// converted to type ulong. or an error ocurrs if the other
// operand is of type sbyte, short, int or long
//
-
if (l == TypeManager.uint64_type){
- if (r != TypeManager.uint64_type && right is IntLiteral){
- e = TryImplicitIntConversion (l, (IntLiteral) right);
- if (e != null)
- right = e;
+ if (r != TypeManager.uint64_type){
+ if (right is IntConstant){
+ IntConstant ic = (IntConstant) right;
+
+ e = TryImplicitIntConversion (l, ic);
+ if (e != null)
+ right = e;
+ } else if (right is LongConstant){
+ long ll = ((LongConstant) right).Value;
+
+ if (ll > 0)
+ right = new ULongConstant ((ulong) ll);
+ } else {
+ e = ImplicitNumericConversion (ec, right, l, loc);
+ if (e != null)
+ right = e;
+ }
}
other = right.Type;
} else {
- if (left is IntLiteral){
- e = TryImplicitIntConversion (r, (IntLiteral) left);
+ if (left is IntConstant){
+ e = TryImplicitIntConversion (r, (IntConstant) left);
+ if (e != null)
+ left = e;
+ } else if (left is LongConstant){
+ long ll = ((LongConstant) left).Value;
+
+ if (ll > 0)
+ left = new ULongConstant ((ulong) ll);
+ } else {
+ e = ImplicitNumericConversion (ec, left, r, loc);
if (e != null)
left = e;
}
if ((other == TypeManager.sbyte_type) ||
(other == TypeManager.short_type) ||
(other == TypeManager.int32_type) ||
- (other == TypeManager.int64_type)){
- string oper = OperName ();
-
- Error (34, loc, "Operator `" + OperName ()
- + "' is ambiguous on operands of type `"
- + TypeManager.CSharpName (l) + "' "
- + "and `" + TypeManager.CSharpName (r)
- + "'");
- }
+ (other == TypeManager.int64_type))
+ Error_OperatorAmbiguous (loc, oper, l, r);
type = TypeManager.uint64_type;
} else if (l == TypeManager.int64_type || r == TypeManager.int64_type){
//
//
Type other = null;
- if (l == TypeManager.uint32_type)
+ if (l == TypeManager.uint32_type){
+ if (right is IntConstant){
+ IntConstant ic = (IntConstant) right;
+ int val = ic.Value;
+
+ if (val >= 0)
+ right = new UIntConstant ((uint) val);
+
+ type = l;
+ return true;
+ }
other = r;
- else if (r == TypeManager.uint32_type)
- other = l;
+ }
+ else if (r == TypeManager.uint32_type){
+ if (left is IntConstant){
+ IntConstant ic = (IntConstant) left;
+ int val = ic.Value;
+
+ if (val >= 0)
+ left = new UIntConstant ((uint) val);
+
+ type = r;
+ return true;
+ }
+
+ other = l;
+ }
if ((other == TypeManager.sbyte_type) ||
(other == TypeManager.short_type) ||
return true;
}
- void error19 ()
+ static public void Error_OperatorCannotBeApplied (Location loc, string name, Type l, Type r)
{
Error (19, loc,
- "Operator " + OperName () + " cannot be applied to operands of type `" +
- TypeManager.CSharpName (left.Type) + "' and `" +
- TypeManager.CSharpName (right.Type) + "'");
-
+ "Operator " + name + " cannot be applied to operands of type `" +
+ TypeManager.CSharpName (l) + "' and `" +
+ TypeManager.CSharpName (r) + "'");
}
+ void error19 ()
+ {
+ Error_OperatorCannotBeApplied (loc, OperName (oper), left.Type, right.Type);
+ }
+
+ static bool is_32_or_64 (Type t)
+ {
+ return (t == TypeManager.int32_type || t == TypeManager.uint32_type ||
+ t == TypeManager.int64_type || t == TypeManager.uint64_type);
+ }
+
Expression CheckShiftArguments (EmitContext ec)
{
Expression e;
string op = "op_" + oper;
- left_expr = MemberLookup (ec, l, op, false, loc);
- if (left_expr == null && l.BaseType != null)
- left_expr = MemberLookup (ec, l.BaseType, op, false, loc);
-
- right_expr = MemberLookup (ec, r, op, false, loc);
- if (right_expr == null && r.BaseType != null)
- right_expr = MemberLookup (ec, r.BaseType, op, false, loc);
-
- MethodGroupExpr union = Invocation.MakeUnionSet (left_expr, right_expr);
+ MethodGroupExpr union;
+ left_expr = MemberLookup (ec, l, op, MemberTypes.Method, AllBindingFlags, loc);
+ if (r != l){
+ right_expr = MemberLookup (
+ ec, r, op, MemberTypes.Method, AllBindingFlags, loc);
+ union = Invocation.MakeUnionSet (left_expr, right_expr);
+ } else
+ union = (MethodGroupExpr) left_expr;
if (union != null) {
Arguments = new ArrayList ();
method = Invocation.OverloadResolve (ec, union, Arguments, loc);
if (method != null) {
MethodInfo mi = (MethodInfo) method;
+
type = mi.ReturnType;
return this;
} else {
//
// Step 2: Default operations on CLI native types.
//
-
+
// Only perform numeric promotions on:
// +, -, *, /, %, &, |, ^, ==, !=, <, >, <=, >=
//
// If any of the arguments is a string, cast to string
//
if (l == TypeManager.string_type){
+
+ if (r == TypeManager.void_type) {
+ error19 ();
+ return null;
+ }
+
if (r == TypeManager.string_type){
- if (left is Literal && right is Literal){
- StringLiteral ls = (StringLiteral) left;
- StringLiteral rs = (StringLiteral) right;
+ if (left is Constant && right is Constant){
+ StringConstant ls = (StringConstant) left;
+ StringConstant rs = (StringConstant) right;
- return new StringLiteral (ls.Value + rs.Value);
+ return new StringConstant (
+ ls.Value + rs.Value);
}
// string + string
} else if (r == TypeManager.string_type){
// object + string
+
+ if (l == TypeManager.void_type) {
+ error19 ();
+ return null;
+ }
+
method = TypeManager.string_concat_object_object;
+ left = ConvertImplicit (ec, left, TypeManager.object_type, loc);
Arguments = new ArrayList ();
Arguments.Add (new Argument (left, Argument.AType.Expression));
Arguments.Add (new Argument (right, Argument.AType.Expression));
- left = ConvertImplicit (ec, left, TypeManager.object_type, loc);
type = TypeManager.string_type;
return this;
}
+ }
+
+ if (oper == Operator.Addition || oper == Operator.Subtraction) {
+ if (l.IsSubclassOf (TypeManager.delegate_type) &&
+ r.IsSubclassOf (TypeManager.delegate_type)) {
+
+ Arguments = new ArrayList ();
+ Arguments.Add (new Argument (left, Argument.AType.Expression));
+ Arguments.Add (new Argument (right, Argument.AType.Expression));
+
+ if (oper == Operator.Addition)
+ method = TypeManager.delegate_combine_delegate_delegate;
+ else
+ method = TypeManager.delegate_remove_delegate_delegate;
+
+ DelegateOperation = true;
+ type = l;
+ return this;
+ }
//
- // FIXME: is Delegate operator + (D x, D y) handled?
+ // Pointer arithmetic:
+ //
+ // T* operator + (T* x, int y);
+ // T* operator + (T* x, uint y);
+ // T* operator + (T* x, long y);
+ // T* operator + (T* x, ulong y);
+ //
+ // T* operator + (int y, T* x);
+ // T* operator + (uint y, T *x);
+ // T* operator + (long y, T *x);
+ // T* operator + (ulong y, T *x);
+ //
+ // T* operator - (T* x, int y);
+ // T* operator - (T* x, uint y);
+ // T* operator - (T* x, long y);
+ // T* operator - (T* x, ulong y);
+ //
+ // long operator - (T* x, T *y)
//
+ if (l.IsPointer){
+ if (r.IsPointer && oper == Operator.Subtraction){
+ if (r == l)
+ return new PointerArithmetic (
+ false, left, right, TypeManager.int64_type);
+ } else if (is_32_or_64 (r))
+ return new PointerArithmetic (
+ oper == Operator.Addition, left, right, l);
+ } else if (r.IsPointer && is_32_or_64 (l) && oper == Operator.Addition)
+ return new PointerArithmetic (
+ true, right, left, r);
+ }
+
+ //
+ // Enumeration operators
+ //
+ bool lie = TypeManager.IsEnumType (l);
+ bool rie = TypeManager.IsEnumType (r);
+ if (lie || rie){
+ Expression temp;
+
+ if (!rie){
+ temp = ConvertImplicit (ec, right, l, loc);
+ if (temp != null)
+ right = temp;
+ } if (!lie){
+ temp = ConvertImplicit (ec, left, r, loc);
+ if (temp != null){
+ left = temp;
+ l = r;
+ }
+ }
+
+ if (oper == Operator.Equality || oper == Operator.Inequality ||
+ oper == Operator.LessThanOrEqual || oper == Operator.LessThan ||
+ oper == Operator.GreaterThanOrEqual || oper == Operator.GreaterThan){
+ type = TypeManager.bool_type;
+ return this;
+ }
+
+ if (oper == Operator.BitwiseAnd ||
+ oper == Operator.BitwiseOr ||
+ oper == Operator.ExclusiveOr){
+ type = l;
+ return this;
+ }
}
if (oper == Operator.LeftShift || oper == Operator.RightShift)
return this;
}
- }
-
- //
- // We are dealing with numbers
- //
-
- if (!DoNumericPromotions (ec, l, r)){
- // Attempt:
//
// operator != (object a, object b)
// operator == (object a, object b)
//
+ // For this to be used, both arguments have to be reference-types.
+ // Read the rationale on the spec (14.9.6)
+ //
+ // Also, if at compile time we know that the classes do not inherit
+ // one from the other, then we catch the error there.
+ //
+ if (!(l.IsValueType || r.IsValueType)){
+ type = TypeManager.bool_type;
- if (oper == Operator.Equality || oper == Operator.Inequality){
- Expression li, ri;
- li = ConvertImplicit (ec, left, TypeManager.object_type, loc);
- if (li != null){
- ri = ConvertImplicit (ec, right, TypeManager.object_type,
- loc);
- if (ri != null){
- left = li;
- right = ri;
-
- type = TypeManager.bool_type;
- return this;
- }
- }
+ if (l == r)
+ return this;
+
+ if (l.IsSubclassOf (r) || r.IsSubclassOf (l))
+ return this;
+
+ //
+ // We are going to have to convert to an object to compare
+ //
+ if (l != TypeManager.object_type)
+ left = new EmptyCast (left, TypeManager.object_type);
+ if (r != TypeManager.object_type)
+ right = new EmptyCast (right, TypeManager.object_type);
+
+ return this;
}
+ }
+
+ //
+ // Pointer comparison
+ //
+ if (l.IsPointer && r.IsPointer){
+ if (oper == Operator.Equality || oper == Operator.Inequality ||
+ oper == Operator.LessThan || oper == Operator.LessThanOrEqual ||
+ oper == Operator.GreaterThan || oper == Operator.GreaterThanOrEqual){
+ type = TypeManager.bool_type;
+ return this;
+ }
+ }
+
+ //
+ // We are dealing with numbers
+ //
+ if (!DoNumericPromotions (ec, l, r)){
error19 ();
return null;
}
oper == Operator.BitwiseOr ||
oper == Operator.ExclusiveOr){
if (l == r){
- if (l.IsSubclassOf (TypeManager.enum_type) ||
- !((l == TypeManager.int32_type) ||
+ if (!((l == TypeManager.int32_type) ||
(l == TypeManager.uint32_type) ||
(l == TypeManager.int64_type) ||
(l == TypeManager.uint64_type)))
return this;
}
-
+
public override Expression DoResolve (EmitContext ec)
{
left = left.Resolve (ec);
eclass = ExprClass.Value;
+ if (left is Constant && right is Constant){
+ Expression e = ConstantFold.BinaryFold (
+ ec, oper, (Constant) left, (Constant) right, loc);
+ if (e != null)
+ return e;
+ }
+
return ResolveOperator (ec);
}
else
ig.Emit (OpCodes.Call, (ConstructorInfo) method);
+ if (DelegateOperation)
+ ig.Emit (OpCodes.Castclass, type);
+
return;
}
ig.Emit (opcode);
}
+ }
- /// <summary>
- /// Constant expression reducer for binary operations
- /// </summary>
- public override Expression Reduce (EmitContext ec)
- {
-
- left = left.Reduce (ec);
- right = right.Reduce (ec);
+ public class PointerArithmetic : Expression {
+ Expression left, right;
+ bool is_add;
- if (!(left is Literal && right is Literal))
- return this;
+ //
+ // We assume that `l' is always a pointer
+ //
+ public PointerArithmetic (bool is_addition, Expression l, Expression r, Type t)
+ {
+ type = t;
+ eclass = ExprClass.Variable;
+ left = l;
+ right = r;
+ is_add = is_addition;
+ }
- if (method == TypeManager.string_concat_string_string){
- StringLiteral ls = (StringLiteral) left;
- StringLiteral rs = (StringLiteral) right;
-
- return new StringLiteral (ls.Value + rs.Value);
- }
+ public override Expression DoResolve (EmitContext ec)
+ {
+ //
+ // We are born fully resolved
+ //
+ return this;
+ }
- // FINISH ME.
+ public override void Emit (EmitContext ec)
+ {
+ Type op_type = left.Type;
+ ILGenerator ig = ec.ig;
+ int size = GetTypeSize (op_type.GetElementType ());
- return this;
+ if (right.Type.IsPointer){
+ //
+ // handle (pointer - pointer)
+ //
+ left.Emit (ec);
+ right.Emit (ec);
+ ig.Emit (OpCodes.Sub);
+
+ if (size != 1){
+ if (size == 0)
+ ig.Emit (OpCodes.Sizeof, op_type);
+ else
+ IntLiteral.EmitInt (ig, size);
+ ig.Emit (OpCodes.Div);
+ }
+ ig.Emit (OpCodes.Conv_I8);
+ } else {
+ //
+ // handle + and - on (pointer op int)
+ //
+ left.Emit (ec);
+ ig.Emit (OpCodes.Conv_I);
+ right.Emit (ec);
+ if (size != 1){
+ if (size == 0)
+ ig.Emit (OpCodes.Sizeof, op_type);
+ else
+ IntLiteral.EmitInt (ig, size);
+ ig.Emit (OpCodes.Mul);
+ }
+ if (is_add)
+ ig.Emit (OpCodes.Add);
+ else
+ ig.Emit (OpCodes.Sub);
+ }
}
}
-
+
+ /// <summary>
+ /// Implements the ternary conditiona operator (?:)
+ /// </summary>
public class Conditional : Expression {
Expression expr, trueExpr, falseExpr;
Location loc;
if (expr == null || trueExpr == null || falseExpr == null)
return null;
+ eclass = ExprClass.Value;
if (trueExpr.Type == falseExpr.Type)
type = trueExpr.Type;
else {
Expression conv;
+ Type true_type = trueExpr.Type;
+ Type false_type = falseExpr.Type;
+ if (trueExpr is NullLiteral){
+ type = false_type;
+ return this;
+ } else if (falseExpr is NullLiteral){
+ type = true_type;
+ return this;
+ }
+
//
// First, if an implicit conversion exists from trueExpr
// to falseExpr, then the result type is of type falseExpr.Type
//
- conv = ConvertImplicit (ec, trueExpr, falseExpr.Type, loc);
+ conv = ConvertImplicit (ec, trueExpr, false_type, loc);
if (conv != null){
- type = falseExpr.Type;
+ //
+ // Check if both can convert implicitl to each other's type
+ //
+ if (ConvertImplicit (ec, falseExpr, true_type, loc) != null){
+ Report.Error (
+ 172, loc,
+ "Can not compute type of conditional expression " +
+ "as `" + TypeManager.CSharpName (trueExpr.Type) +
+ "' and `" + TypeManager.CSharpName (falseExpr.Type) +
+ "' convert implicitly to each other");
+ return null;
+ }
+ type = false_type;
trueExpr = conv;
- } else if ((conv = ConvertImplicit(ec, falseExpr,trueExpr.Type,loc))!= null){
- type = trueExpr.Type;
+ } else if ((conv = ConvertImplicit(ec, falseExpr, true_type,loc))!= null){
+ type = true_type;
falseExpr = conv;
} else {
Error (173, loc, "The type of the conditional expression can " +
}
}
- if (expr is BoolLiteral){
- BoolLiteral bl = (BoolLiteral) expr;
+ if (expr is BoolConstant){
+ BoolConstant bc = (BoolConstant) expr;
- if (bl.Value)
+ if (bc.Value)
return trueExpr;
else
return falseExpr;
}
-
- eclass = ExprClass.Value;
+
return this;
}
ig.MarkLabel (end_target);
}
- public override Expression Reduce (EmitContext ec)
- {
- expr = expr.Reduce (ec);
- trueExpr = trueExpr.Reduce (ec);
- falseExpr = falseExpr.Reduce (ec);
-
- if (!(expr is Literal && trueExpr is Literal && falseExpr is Literal))
- return this;
-
- BoolLiteral bl = (BoolLiteral) expr;
-
- if (bl.Value)
- return trueExpr;
- else
- return falseExpr;
- }
}
+ /// <summary>
+ /// Local variables
+ /// </summary>
public class LocalVariableReference : Expression, IAssignMethod, IMemoryLocation {
public readonly string Name;
public readonly Block Block;
-
+ Location loc;
VariableInfo variable_info;
- public LocalVariableReference (Block block, string name)
+ public LocalVariableReference (Block block, string name, Location l)
{
Block = block;
Name = name;
+ loc = l;
eclass = ExprClass.Variable;
}
{
VariableInfo vi = VariableInfo;
+ if (Block.IsConstant (Name)) {
+ Expression e = Block.GetConstantExpression (Name);
+
+ vi.Used = true;
+ return e;
+ }
+
type = vi.VariableType;
return this;
}
+ override public Expression DoResolveLValue (EmitContext ec, Expression right_side)
+ {
+ Expression e = DoResolve (ec);
+
+ if (e == null)
+ return null;
+
+ VariableInfo vi = VariableInfo;
+
+ if (vi.ReadOnly){
+ if (vi.Assigned){
+ Report.Error (
+ 1604, loc,
+ "cannot assign to `" + Name + "' because it is readonly");
+ return null;
+ }
+ }
+
+ return this;
+ }
+
public override void Emit (EmitContext ec)
{
VariableInfo vi = VariableInfo;
Store (ig, vi.Idx);
}
- public void AddressOf (EmitContext ec)
+ public void AddressOf (EmitContext ec, AddressOp mode)
{
VariableInfo vi = VariableInfo;
int idx = vi.Idx;
- vi.Used = true;
- vi.Assigned = true;
+ if ((mode & AddressOp.Load) != 0)
+ vi.Used = true;
+ if ((mode & AddressOp.Store) != 0)
+ vi.Assigned = true;
if (idx <= 255)
ec.ig.Emit (OpCodes.Ldloca_S, (byte) idx);
/// representation.
/// </summary>
public class ParameterReference : Expression, IAssignMethod, IMemoryLocation {
- public readonly Parameters Pars;
- public readonly String Name;
- public readonly int Idx;
- int arg_idx;
+ Parameters pars;
+ String name;
+ int idx;
+ public bool is_ref;
public ParameterReference (Parameters pars, int idx, string name)
{
- Pars = pars;
- Idx = idx;
- Name = name;
+ this.pars = pars;
+ this.idx = idx;
+ this.name = name;
eclass = ExprClass.Variable;
}
+ //
+ // Notice that for ref/out parameters, the type exposed is not the
+ // same type exposed externally.
+ //
+ // for "ref int a":
+ // externally we expose "int&"
+ // here we expose "int".
+ //
+ // We record this in "is_ref". This means that the type system can treat
+ // the type as it is expected, but when we generate the code, we generate
+ // the alternate kind of code.
+ //
public override Expression DoResolve (EmitContext ec)
{
- Type [] types = Pars.GetParameterInfo (ec.TypeContainer);
+ type = pars.GetParameterInfo (ec.TypeContainer, idx, out is_ref);
+ eclass = ExprClass.Variable;
+
+ return this;
+ }
- type = types [Idx];
+ //
+ // This method is used by parameters that are references, that are
+ // being passed as references: we only want to pass the pointer (that
+ // is already stored in the parameter, not the address of the pointer,
+ // and not the value of the variable).
+ //
+ public void EmitLoad (EmitContext ec)
+ {
+ ILGenerator ig = ec.ig;
+ int arg_idx = idx;
- arg_idx = Idx;
if (!ec.IsStatic)
arg_idx++;
- return this;
+ if (arg_idx <= 255)
+ ig.Emit (OpCodes.Ldarg_S, (byte) arg_idx);
+ else
+ ig.Emit (OpCodes.Ldarg, arg_idx);
}
-
+
public override void Emit (EmitContext ec)
{
+ ILGenerator ig = ec.ig;
+ int arg_idx = idx;
+
+ if (!ec.IsStatic)
+ arg_idx++;
+
if (arg_idx <= 255)
- ec.ig.Emit (OpCodes.Ldarg_S, (byte) arg_idx);
+ ig.Emit (OpCodes.Ldarg_S, (byte) arg_idx);
else
- ec.ig.Emit (OpCodes.Ldarg, arg_idx);
+ ig.Emit (OpCodes.Ldarg, arg_idx);
+
+ if (!is_ref)
+ return;
+
+ //
+ // If we are a reference, we loaded on the stack a pointer
+ // Now lets load the real value
+ //
+ LoadFromPtr (ig, type, true);
}
public void EmitAssign (EmitContext ec, Expression source)
{
- source.Emit (ec);
+ ILGenerator ig = ec.ig;
+ int arg_idx = idx;
+
+ if (!ec.IsStatic)
+ arg_idx++;
+
+ if (is_ref){
+ // Load the pointer
+ if (arg_idx <= 255)
+ ig.Emit (OpCodes.Ldarg_S, (byte) arg_idx);
+ else
+ ig.Emit (OpCodes.Ldarg, arg_idx);
+ }
- if (arg_idx <= 255)
- ec.ig.Emit (OpCodes.Starg_S, (byte) arg_idx);
- else
- ec.ig.Emit (OpCodes.Starg, arg_idx);
+ source.Emit (ec);
+
+ if (is_ref)
+ StoreFromPtr (ig, type);
+ else {
+ if (arg_idx <= 255)
+ ig.Emit (OpCodes.Starg_S, (byte) arg_idx);
+ else
+ ig.Emit (OpCodes.Starg, arg_idx);
+ }
}
- public void AddressOf (EmitContext ec)
+ public void AddressOf (EmitContext ec, AddressOp mode)
{
+ int arg_idx = idx;
+
+ if (!ec.IsStatic)
+ arg_idx++;
+
if (arg_idx <= 255)
ec.ig.Emit (OpCodes.Ldarga_S, (byte) arg_idx);
else
public Parameter.Modifier GetParameterModifier ()
{
- if (ArgType == AType.Ref)
- return Parameter.Modifier.REF;
-
- if (ArgType == AType.Out)
+ if (ArgType == AType.Ref || ArgType == AType.Out)
return Parameter.Modifier.OUT;
return Parameter.Modifier.NONE;
if (ArgType == AType.Expression)
return expr != null;
- if (expr.ExprClass != ExprClass.Variable){
- Report.Error (206, loc,
- "A property or indexer can not be passed as an out or ref " +
- "parameter");
+ if (expr.eclass != ExprClass.Variable){
+ //
+ // We just probe to match the CSC output
+ //
+ if (expr.eclass == ExprClass.PropertyAccess ||
+ expr.eclass == ExprClass.IndexerAccess){
+ Report.Error (
+ 206, loc,
+ "A property or indexer can not be passed as an out or ref " +
+ "parameter");
+ } else {
+ Report.Error (
+ 1510, loc,
+ "An lvalue is required as an argument to out or ref");
+ }
return false;
}
public void Emit (EmitContext ec)
{
- if (ArgType == AType.Ref || ArgType == AType.Out)
- ((IMemoryLocation)expr).AddressOf (ec);
- else
+ //
+ // Ref and Out parameters need to have their addresses taken.
+ //
+ // ParameterReferences might already be references, so we want
+ // to pass just the value
+ //
+ if (ArgType == AType.Ref || ArgType == AType.Out){
+ AddressOp mode = AddressOp.Store;
+
+ if (ArgType == AType.Ref)
+ mode |= AddressOp.Load;
+
+ if (expr is ParameterReference){
+ ParameterReference pr = (ParameterReference) expr;
+
+ if (pr.is_ref)
+ pr.EmitLoad (ec);
+ else {
+
+ pr.AddressOf (ec, mode);
+ }
+ } else
+ ((IMemoryLocation)expr).AddressOf (ec, mode);
+ } else
expr.Emit (ec);
}
}
Expression expr;
MethodBase method = null;
-
+ bool is_base;
+
static Hashtable method_parameter_cache;
static Invocation ()
{
- method_parameter_cache = new Hashtable ();
+ method_parameter_cache = new PtrHashtable ();
}
//
return (ParameterData) pd;
- ip = TypeContainer.LookupParametersByBuilder (mb);
+ ip = TypeManager.LookupParametersByBuilder (mb);
if (ip != null){
method_parameter_cache [mb] = ip;
}
}
- /// <summary>
- /// Tells whether a user defined conversion from Type `from' to
- /// Type `to' exists.
- ///
- /// FIXME: we could implement a cache here.
- /// </summary>
- static bool ConversionExists (EmitContext ec, Type from, Type to, Location loc)
- {
- // Locate user-defined implicit operators
-
- Expression mg;
-
- mg = MemberLookup (ec, to, "op_Implicit", false, loc);
-
- if (mg != null) {
- MethodGroupExpr me = (MethodGroupExpr) mg;
-
- for (int i = me.Methods.Length; i > 0;) {
- i--;
- MethodBase mb = me.Methods [i];
- ParameterData pd = GetParameterData (mb);
-
- if (from == pd.ParameterType (0))
- return true;
- }
- }
-
- mg = MemberLookup (ec, from, "op_Implicit", false, loc);
-
- if (mg != null) {
- MethodGroupExpr me = (MethodGroupExpr) mg;
-
- for (int i = me.Methods.Length; i > 0;) {
- i--;
- MethodBase mb = me.Methods [i];
- MethodInfo mi = (MethodInfo) mb;
-
- if (mi.ReturnType == to)
- return true;
- }
- }
-
- return false;
- }
-
/// <summary>
/// Determines "better conversion" as specified in 7.4.2.3
/// Returns : 1 if a->p is better
/// 0 if a->q or neither is better
/// </summary>
- static int BetterConversion (EmitContext ec, Argument a, Type p, Type q, bool use_standard,
- Location loc)
+ static int BetterConversion (EmitContext ec, Argument a, Type p, Type q, Location loc)
{
Type argument_type = a.Type;
Expression argument_expr = a.Expr;
// taken place. We dont do constant folding yet.
//
- if (argument_expr is IntLiteral){
- IntLiteral ei = (IntLiteral) argument_expr;
+ if (argument_expr is IntConstant){
+ IntConstant ei = (IntConstant) argument_expr;
int value = ei.Value;
if (p == TypeManager.sbyte_type){
if (value >= 0)
return 1;
}
- } else if (argument_type == TypeManager.int64_type && argument_expr is LongLiteral){
- LongLiteral ll = (LongLiteral) argument_expr;
+ } else if (argument_type == TypeManager.int64_type && argument_expr is LongConstant){
+ LongConstant lc = (LongConstant) argument_expr;
if (p == TypeManager.uint64_type){
- if (ll.Value > 0)
+ if (lc.Value > 0)
return 1;
}
}
if (q == null) {
-
- Expression tmp;
-
- if (use_standard)
- tmp = ConvertImplicitStandard (ec, argument_expr, p, loc);
- else
- tmp = ConvertImplicit (ec, argument_expr, p, loc);
-
+ Expression tmp = ConvertImplicitStandard (ec, argument_expr, p, loc);
+
if (tmp != null)
return 1;
else
return 0;
-
}
- if (ConversionExists (ec, p, q, loc) == true &&
- ConversionExists (ec, q, p, loc) == false)
+ if (StandardConversionExists (p, q) == true &&
+ StandardConversionExists (q, p) == false)
return 1;
if (p == TypeManager.sbyte_type)
/// </remarks>
static int BetterFunction (EmitContext ec, ArrayList args,
MethodBase candidate, MethodBase best,
- bool use_standard, Location loc)
+ bool expanded_form, Location loc)
{
ParameterData candidate_pd = GetParameterData (candidate);
ParameterData best_pd;
int argument_count;
+
if (args == null)
argument_count = 0;
else
argument_count = args.Count;
- if (candidate_pd.Count == 0 && argument_count == 0)
+ int cand_count = candidate_pd.Count;
+
+ if (cand_count == 0 && argument_count == 0)
return 1;
- if (best == null) {
- if (candidate_pd.Count == argument_count) {
- int x = 0;
- for (int j = argument_count; j > 0;) {
- j--;
-
- Argument a = (Argument) args [j];
-
- x = BetterConversion (
- ec, a, candidate_pd.ParameterType (j), null,
- use_standard, loc);
-
- if (x <= 0)
- break;
- }
-
- if (x > 0)
- return 1;
- else
- return 0;
-
- } else
+ if (candidate_pd.ParameterModifier (cand_count - 1) != Parameter.Modifier.PARAMS)
+ if (cand_count != argument_count)
return 0;
- }
-
- best_pd = GetParameterData (best);
+
+ if (best == null) {
+ int x = 0;
- if (candidate_pd.Count == argument_count && best_pd.Count == argument_count) {
- int rating1 = 0, rating2 = 0;
+ if (argument_count == 0 && cand_count == 1 &&
+ candidate_pd.ParameterModifier (cand_count - 1) == Parameter.Modifier.PARAMS)
+ return 1;
for (int j = argument_count; j > 0;) {
j--;
- int x, y;
-
+
Argument a = (Argument) args [j];
+ Type t = candidate_pd.ParameterType (j);
- x = BetterConversion (ec, a, candidate_pd.ParameterType (j),
- best_pd.ParameterType (j), use_standard, loc);
- y = BetterConversion (ec, a, best_pd.ParameterType (j),
- candidate_pd.ParameterType (j), use_standard,
- loc);
+ if (candidate_pd.ParameterModifier (j) == Parameter.Modifier.PARAMS)
+ if (expanded_form)
+ t = t.GetElementType ();
+
+ x = BetterConversion (ec, a, t, null, loc);
- rating1 += x;
- rating2 += y;
+ if (x <= 0)
+ break;
}
-
- if (rating1 > rating2)
+
+ if (x > 0)
return 1;
else
return 0;
- } else
- return 0;
+ }
+
+ best_pd = GetParameterData (best);
+
+ int rating1 = 0, rating2 = 0;
+ for (int j = 0; j < argument_count; ++j) {
+ int x, y;
+
+ Argument a = (Argument) args [j];
+
+ Type ct = candidate_pd.ParameterType (j);
+ Type bt = best_pd.ParameterType (j);
+
+ if (candidate_pd.ParameterModifier (j) == Parameter.Modifier.PARAMS)
+ if (expanded_form)
+ ct = ct.GetElementType ();
+
+ if (best_pd.ParameterModifier (j) == Parameter.Modifier.PARAMS)
+ if (expanded_form)
+ bt = bt.GetElementType ();
+
+ x = BetterConversion (ec, a, ct, bt, loc);
+ y = BetterConversion (ec, a, bt, ct, loc);
+
+ if (x < y)
+ return 0;
+
+ rating1 += x;
+ rating2 += y;
+ }
+
+ if (rating1 > rating2)
+ return 1;
+ else
+ return 0;
}
public static string FullMethodDesc (MethodBase mb)
{
- StringBuilder sb = new StringBuilder (mb.Name);
+ string ret_type = "";
+
+ if (mb is MethodInfo)
+ ret_type = TypeManager.CSharpName (((MethodInfo) mb).ReturnType);
+
+ StringBuilder sb = new StringBuilder (ret_type + " " + mb.Name);
ParameterData pd = GetParameterData (mb);
int count = pd.Count;
for (int i = count; i > 0; ) {
i--;
-
+
sb.Append (pd.ParameterDesc (count - i - 1));
if (i != 0)
sb.Append (", ");
int pd_count = pd.Count;
+ if (pd_count == 0)
+ return false;
+
if (pd.ParameterModifier (pd_count - 1) != Parameter.Modifier.PARAMS)
return false;
-
+
if (pd_count - 1 > arg_count)
return false;
-
- // If we have come this far, the case which remains is when the number of parameters
- // is less than or equal to the argument count. So, we now check if the element type
- // of the params array is compatible with each argument type
+
+ if (pd_count == 1 && arg_count == 0)
+ return true;
+
//
+ // If we have come this far, the case which remains is when the number of parameters
+ // is less than or equal to the argument count.
+
+ for (int i = 0; i < pd_count - 1; ++i) {
+
+ Argument a = (Argument) arguments [i];
+
+ Parameter.Modifier a_mod = a.GetParameterModifier ();
+ Parameter.Modifier p_mod = pd.ParameterModifier (i);
+
+ if (a_mod == p_mod) {
+
+ if (a_mod == Parameter.Modifier.NONE)
+ if (!StandardConversionExists (a.Type, pd.ParameterType (i)))
+ return false;
+
+ if (a_mod == Parameter.Modifier.REF ||
+ a_mod == Parameter.Modifier.OUT)
+ if (pd.ParameterType (i) != a.Type)
+ return false;
+ } else
+ return false;
+
+ }
Type element_type = pd.ParameterType (pd_count - 1).GetElementType ();
- for (int i = pd_count - 1; i < arg_count - 1; i++) {
+ for (int i = pd_count - 1; i < arg_count; i++) {
Argument a = (Argument) arguments [i];
+
if (!StandardConversionExists (a.Type, element_type))
return false;
}
/// loc: The location if we want an error to be reported, or a Null
/// location for "probing" purposes.
///
- /// use_standard: controls whether OverloadResolve should use the
- /// ConvertImplicit or ConvertImplicitStandard during overload resolution.
- ///
/// Returns: The MethodBase (either a ConstructorInfo or a MethodInfo)
/// that is the best match of me on Arguments.
///
/// </summary>
public static MethodBase OverloadResolve (EmitContext ec, MethodGroupExpr me,
- ArrayList Arguments, Location loc,
- bool use_standard)
+ ArrayList Arguments, Location loc)
{
ArrayList afm = new ArrayList ();
int best_match_idx = -1;
MethodBase method = null;
int argument_count;
+ ArrayList candidates = new ArrayList ();
for (int i = me.Methods.Length; i > 0; ){
i--;
if (!IsApplicable (Arguments, candidate))
continue;
- x = BetterFunction (ec, Arguments, candidate, method, use_standard, loc);
+ candidates.Add (candidate);
+
+ x = BetterFunction (ec, Arguments, candidate, method, false, loc);
if (x == 0)
continue;
// since if they were applicable in their normal form, they would have been selected
// above anyways
//
+ bool chose_params_expanded = false;
+
if (best_match_idx == -1) {
+ candidates = new ArrayList ();
for (int i = me.Methods.Length; i > 0; ) {
i--;
MethodBase candidate = me.Methods [i];
- if (IsParamsMethodApplicable (Arguments, candidate)) {
+ if (!IsParamsMethodApplicable (Arguments, candidate))
+ continue;
+
+ candidates.Add (candidate);
+
+ int x = BetterFunction (ec, Arguments, candidate, method, true, loc);
+
+ if (x == 0)
+ continue;
+ else {
best_match_idx = i;
method = me.Methods [best_match_idx];
- break;
+ chose_params_expanded = true;
}
}
}
// Now we see if we can at least find a method with the same number of arguments
//
ParameterData pd;
-
+ int method_count = 0;
+
if (best_match_idx == -1) {
for (int i = me.Methods.Length; i > 0;) {
if (pd.Count == argument_count) {
best_match_idx = i;
method = me.Methods [best_match_idx];
- break;
+ method_count++;
} else
continue;
}
if (method == null)
return null;
+
+
+ //
+ // Now check that there are no ambiguities i.e the selected method
+ // should be better than all the others
+ //
+
+ for (int i = 0; i < candidates.Count; ++i) {
+ MethodBase candidate = (MethodBase) candidates [i];
+
+ if (candidate == method)
+ continue;
+
+ //
+ // If a normal method is applicable in the sense that it has the same
+ // number of arguments, then the expanded params method is never applicable
+ // so we debar the params method.
+ //
+ if (IsParamsMethodApplicable (Arguments, candidate) &&
+ IsApplicable (Arguments, method))
+ continue;
+
+ int x = BetterFunction (ec, Arguments, method, candidate,
+ chose_params_expanded, loc);
+
+ if (x != 1) {
+ //Console.WriteLine ("Candidate : " + FullMethodDesc (candidate));
+ //Console.WriteLine ("Best : " + FullMethodDesc (method));
+ Report.Error (
+ 121, loc,
+ "Ambiguous call when selecting function due to implicit casts");
+ return null;
+ }
+ }
// And now convert implicitly, each argument to the required type
int pd_count = pd.Count;
for (int j = 0; j < argument_count; j++) {
-
Argument a = (Argument) Arguments [j];
Expression a_expr = a.Expr;
Type parameter_type = pd.ParameterType (j);
- //
- // Note that we need to compare against the element type
- // when we have a params method
- //
- if (pd.ParameterModifier (pd_count - 1) == Parameter.Modifier.PARAMS) {
- if (j >= pd_count - 1)
- parameter_type = pd.ParameterType (pd_count - 1).GetElementType ();
- }
+ if (pd.ParameterModifier (j) == Parameter.Modifier.PARAMS && chose_params_expanded)
+ parameter_type = parameter_type.GetElementType ();
if (a.Type != parameter_type){
Expression conv;
- if (use_standard)
- conv = ConvertImplicitStandard (ec, a_expr, parameter_type, Location.Null);
- else
- conv = ConvertImplicit (ec, a_expr, parameter_type, Location.Null);
+ conv = ConvertImplicitStandard (ec, a_expr, parameter_type, Location.Null);
if (conv == null) {
if (!Location.IsNull (loc)) {
Error (1502, loc,
- "The best overloaded match for method '" + FullMethodDesc (method)+
+ "The best overloaded match for method '" +
+ FullMethodDesc (method) +
"' has some invalid arguments");
Error (1503, loc,
"Argument " + (j+1) +
return null;
}
-
-
//
// Update the argument with the implicit conversion
//
}
if (a.GetParameterModifier () != pd.ParameterModifier (j) &&
- pd.ParameterModifier (j) != Parameter.Modifier.PARAMS) {
+ pd.ParameterModifier (pd_count - 1) != Parameter.Modifier.PARAMS) {
if (!Location.IsNull (loc)) {
+ Console.WriteLine ("A:P: " + a.GetParameterModifier ());
+ Console.WriteLine ("PP:: " + pd.ParameterModifier (j));
+ Console.WriteLine ("PT: " + parameter_type.IsByRef);
Error (1502, loc,
"The best overloaded match for method '" + FullMethodDesc (method)+
"' has some invalid arguments");
}
return null;
}
-
-
}
return method;
}
- public static MethodBase OverloadResolve (EmitContext ec, MethodGroupExpr me,
- ArrayList Arguments, Location loc)
- {
- return OverloadResolve (ec, me, Arguments, loc, false);
- }
-
public override Expression DoResolve (EmitContext ec)
{
//
// First, resolve the expression that is used to
// trigger the invocation
//
+ if (expr is BaseAccess)
+ is_base = true;
+
expr = expr.Resolve (ec);
if (expr == null)
return null;
if (method is MethodInfo)
type = ((MethodInfo)method).ReturnType;
+ if (type.IsPointer){
+ if (!ec.InUnsafe){
+ UnsafeError (loc);
+ return null;
+ }
+ }
+
eclass = ExprClass.Value;
return this;
}
LocalBuilder array;
array = ig.DeclareLocal (Type.GetType (array_type));
- IntLiteral.EmitInt (ig, count);
+ IntConstant.EmitInt (ig, count);
ig.Emit (OpCodes.Newarr, t);
ig.Emit (OpCodes.Stloc, array);
a = (Argument) arguments [j];
ig.Emit (OpCodes.Ldloc, array);
- IntLiteral.EmitInt (ig, j - idx);
+ IntConstant.EmitInt (ig, j - idx);
a.Emit (ec);
ArrayAccess.EmitStoreOpcode (ig, t);
}
}
- public static void EmitCall (EmitContext ec,
+ /// <remarks>
+ /// is_base tells whether we want to force the use of the `call'
+ /// opcode instead of using callvirt. Call is required to call
+ /// a specific method, while callvirt will always use the most
+ /// recent method in the vtable.
+ ///
+ /// is_static tells whether this is an invocation on a static method
+ ///
+ /// instance_expr is an expression that represents the instance
+ /// it must be non-null if is_static is false.
+ ///
+ /// method is the method to invoke.
+ ///
+ /// Arguments is the list of arguments to pass to the method or constructor.
+ /// </remarks>
+ public static void EmitCall (EmitContext ec, bool is_base,
bool is_static, Expression instance_expr,
MethodBase method, ArrayList Arguments)
{
bool struct_call = false;
if (!is_static){
+
+ if (method.DeclaringType.IsValueType)
+ struct_call = true;
//
// If this is ourselves, push "this"
//
// Push the instance expression
//
if (instance_expr.Type.IsSubclassOf (TypeManager.value_type)){
+ //
+ // Special case: calls to a function declared in a
+ // reference-type with a value-type argument need
+ // to have their value boxed.
struct_call = true;
-
- //
- // If the expression implements IMemoryLocation, then
- // we can optimize and use AddressOf on the
- // return.
- //
- // If not we have to use some temporary storage for
- // it.
- if (instance_expr is IMemoryLocation)
- ((IMemoryLocation) instance_expr).AddressOf (ec);
- else {
- Type t = instance_expr.Type;
-
+ if (method.DeclaringType.IsValueType){
+ //
+ // If the expression implements IMemoryLocation, then
+ // we can optimize and use AddressOf on the
+ // return.
+ //
+ // If not we have to use some temporary storage for
+ // it.
+ if (instance_expr is IMemoryLocation){
+ ((IMemoryLocation)instance_expr).
+ AddressOf (ec, AddressOp.LoadStore);
+ }
+ else {
+ Type t = instance_expr.Type;
+
+ instance_expr.Emit (ec);
+ LocalBuilder temp = ig.DeclareLocal (t);
+ ig.Emit (OpCodes.Stloc, temp);
+ ig.Emit (OpCodes.Ldloca, temp);
+ }
+ } else {
instance_expr.Emit (ec);
- LocalBuilder temp = ig.DeclareLocal (t);
- ig.Emit (OpCodes.Stloc, temp);
- ig.Emit (OpCodes.Ldloca, temp);
- }
- } else
+ ig.Emit (OpCodes.Box, instance_expr.Type);
+ }
+ } else
instance_expr.Emit (ec);
}
}
if (Arguments != null)
EmitArguments (ec, method, Arguments);
- if (is_static || struct_call){
+ if (is_static || struct_call || is_base){
if (method is MethodInfo)
ig.Emit (OpCodes.Call, (MethodInfo) method);
else
public override void Emit (EmitContext ec)
{
MethodGroupExpr mg = (MethodGroupExpr) this.expr;
- EmitCall (ec, method.IsStatic, mg.InstanceExpression, method, Arguments);
+
+ EmitCall (ec, is_base, method.IsStatic, mg.InstanceExpression, method, Arguments);
}
public override void EmitStatement (EmitContext ec)
public override Expression DoResolve (EmitContext ec)
{
- type = ec.TypeContainer.LookupType (RequestedType, false);
+ type = RootContext.LookupType (ec.TypeContainer, RequestedType, false, loc);
if (type == null)
return null;
if (IsDelegate)
return (new NewDelegate (type, Arguments, loc)).Resolve (ec);
- Expression ml;
-
- ml = MemberLookup (ec, type, ".ctor", false,
- MemberTypes.Constructor, AllBindingsFlags, loc);
-
bool is_struct = false;
is_struct = type.IsSubclassOf (TypeManager.value_type);
+ eclass = ExprClass.Value;
+
+ //
+ // SRE returns a match for .ctor () on structs (the object constructor),
+ // so we have to manually ignore it.
+ //
+ if (is_struct && Arguments == null)
+ return this;
+
+ Expression ml;
+ ml = MemberLookup (ec, type, ".ctor", MemberTypes.Constructor, AllBindingFlags, loc);
if (! (ml is MethodGroupExpr)){
if (!is_struct){
method = Invocation.OverloadResolve (ec, (MethodGroupExpr) ml,
Arguments, loc);
+
}
if (method == null && !is_struct) {
"this argument list");
return null;
}
-
- eclass = ExprClass.Value;
return this;
}
// need_value_on_stack. The code *might* leave a value on the stack
// so it must be popped manually
//
+ // If we are dealing with a ValueType, we have a few
+ // situations to deal with:
+ //
+ // * The target is a ValueType, and we have been provided
+ // the instance (this is easy, we are being assigned).
+ //
+ // * The target of New is being passed as an argument,
+ // to a boxing operation or a function that takes a
+ // ValueType.
+ //
+ // In this case, we need to create a temporary variable
+ // that is the argument of New.
+ //
// Returns whether a value is left on the stack
//
bool DoEmit (EmitContext ec, bool need_value_on_stack)
{
- if (method == null){
- IMemoryLocation ml = (IMemoryLocation) value_target;
+ bool is_value_type = type.IsSubclassOf (TypeManager.value_type);
+ ILGenerator ig = ec.ig;
+
+ if (is_value_type){
+ IMemoryLocation ml;
- ml.AddressOf (ec);
- } else {
- Invocation.EmitArguments (ec, method, Arguments);
- ec.ig.Emit (OpCodes.Newobj, (ConstructorInfo) method);
- return true;
+ if (value_target == null)
+ value_target = new LocalTemporary (ec, type);
+
+ ml = (IMemoryLocation) value_target;
+ ml.AddressOf (ec, AddressOp.Store);
}
- //
- // It must be a value type, sanity check
- //
- if (value_target != null){
- ec.ig.Emit (OpCodes.Initobj, type);
+ if (method != null)
+ Invocation.EmitArguments (ec, method, Arguments);
+
+ if (is_value_type){
+ if (method == null)
+ ig.Emit (OpCodes.Initobj, type);
+ else
+ ig.Emit (OpCodes.Call, (ConstructorInfo) method);
if (need_value_on_stack){
value_target.Emit (ec);
return true;
}
return false;
+ } else {
+ ig.Emit (OpCodes.Newobj, (ConstructorInfo) method);
+ return true;
}
-
- throw new Exception ("No method and no value type");
}
public override void Emit (EmitContext ec)
/// <remarks>
/// There are two possible scenarios here: one is an array creation
/// expression that specifies the dimensions and optionally the
- /// initialization data
+ /// initialization data and the other which does not need dimensions
+ /// specified but where initialization data is mandatory.
/// </remarks>
public class ArrayCreation : ExpressionStatement {
-
string RequestedType;
string Rank;
ArrayList Initializers;
MethodBase method = null;
Type array_element_type;
bool IsOneDimensional = false;
-
bool IsBuiltinType = false;
+ bool ExpectInitializers = false;
int dimensions = 0;
Type underlying_type;
ArrayList ArrayData;
- ArrayList ArrayExprs;
- ArrayList Bounds;
+ Hashtable Bounds;
+ //
+ // The number of array initializers that we can handle
+ // via the InitializeArray method - through EmitStaticInitializers
+ //
+ int num_automatic_initializers;
+
public ArrayCreation (string requested_type, ArrayList exprs,
string rank, ArrayList initializers, Location l)
{
foreach (Expression e in exprs)
Arguments.Add (new Argument (e, Argument.AType.Expression));
-
}
public ArrayCreation (string requested_type, string rank, ArrayList initializers, Location l)
string tmp = rank.Substring (rank.LastIndexOf ("["));
dimensions = tmp.Length - 1;
+ ExpectInitializers = true;
}
public static string FormArrayType (string base_type, int idx_count, string rank)
sb.Append ("[");
for (int i = 1; i < idx_count; i++)
sb.Append (",");
- sb.Append ("]");
+ sb.Append ("]");
+
return sb.ToString ();
}
sb.Append ("[");
for (int i = 1; i < idx_count; i++)
sb.Append (",");
+
sb.Append ("]");
-
+
sb.Append (rank);
string val = sb.ToString ();
if (!a.Resolve (ec, loc))
return false;
- Expression e = Expression.Reduce (ec, a.Expr);
-
- if (!(e is Literal)) {
+ if (!(a.Expr is Constant)) {
Report.Error (150, loc, "A constant value is expected");
return false;
}
- int value = (int) ((Literal) e).GetValue ();
+ int value = (int) ((Constant) a.Expr).GetValue ();
if (value != probe.Count) {
error178 ();
return false;
}
- Bounds.Add (value);
+ Bounds [idx] = value;
}
foreach (object o in probe) {
-
if (o is ArrayList) {
bool ret = CheckIndices (ec, (ArrayList) o, idx + 1, specified_dims);
if (!ret)
return false;
-
} else {
Expression tmp = (Expression) o;
tmp = tmp.Resolve (ec);
- tmp = Expression.Reduce (ec, tmp);
-
- // Handle initialization from vars, fields etc.
+ if (tmp == null)
+ continue;
- Expression conv = ConvertImplicitRequired (ec, tmp, underlying_type, loc);
+ // Handle initialization from vars, fields etc.
+
+ Expression conv = ConvertImplicitRequired (
+ ec, tmp, underlying_type, loc);
if (conv == null)
return false;
- if (tmp is Literal)
- ArrayData.Add (((Literal) tmp).GetValue ());
- else
- ArrayData.Add ((object) 0);
-
- ArrayExprs.Add (tmp);
+ if (conv is StringConstant)
+ ArrayData.Add (conv);
+ else if (conv is Constant) {
+ ArrayData.Add (conv);
+ num_automatic_initializers++;
+ } else
+ ArrayData.Add (conv);
}
}
}
public void UpdateIndices (EmitContext ec)
- {
+ {
+ int i = 0;
for (ArrayList probe = Initializers; probe != null;) {
-
- if (probe [0] is ArrayList) {
- Expression e = new IntLiteral (probe.Count);
+ if (probe.Count > 0 && probe [0] is ArrayList) {
+ Expression e = new IntConstant (probe.Count);
Arguments.Add (new Argument (e, Argument.AType.Expression));
- Bounds.Add (probe.Count);
+
+ Bounds [i++] = probe.Count;
+
probe = (ArrayList) probe [0];
} else {
- Expression e = new IntLiteral (probe.Count);
+ Expression e = new IntConstant (probe.Count);
Arguments.Add (new Argument (e, Argument.AType.Expression));
- Bounds.Add (probe.Count);
+
+ Bounds [i++] = probe.Count;
probe = null;
}
}
public bool ValidateInitializers (EmitContext ec)
{
- if (Initializers == null)
- return true;
-
- underlying_type = ec.TypeContainer.LookupType (RequestedType, false);
-
+ if (Initializers == null) {
+ if (ExpectInitializers)
+ return false;
+ else
+ return true;
+ }
+
+ underlying_type = RootContext.LookupType (
+ ec.TypeContainer, RequestedType, false, loc);
+
//
// We use this to store all the date values in the order in which we
// will need to store them in the byte blob later
//
ArrayData = new ArrayList ();
- ArrayExprs = new ArrayList ();
- Bounds = new ArrayList ();
+ Bounds = new Hashtable ();
bool ret;
{
int arg_count;
+ //
+ // First step is to validate the initializers and fill
+ // in any missing bits
+ //
if (!ValidateInitializers (ec))
return null;
if (Arguments == null)
arg_count = 0;
- else
+ else {
arg_count = Arguments.Count;
+ for (int i = arg_count; i > 0;){
+ --i;
+ Argument a = (Argument) Arguments [i];
+
+ if (!a.Resolve (ec, loc))
+ return null;
+ }
+ }
string array_type = FormArrayType (RequestedType, arg_count, Rank);
-
string element_type = FormElementType (RequestedType, arg_count, Rank);
- type = ec.TypeContainer.LookupType (array_type, false);
+ type = RootContext.LookupType (ec.TypeContainer, array_type, false, loc);
- array_element_type = ec.TypeContainer.LookupType (element_type, false);
+ array_element_type = RootContext.LookupType (
+ ec.TypeContainer, element_type, false, loc);
if (type == null)
return null;
IsBuiltinType = TypeManager.IsBuiltinType (type);
if (IsBuiltinType) {
-
+
Expression ml;
- ml = MemberLookup (ec, type, ".ctor", false, MemberTypes.Constructor,
- AllBindingsFlags, loc);
+ ml = MemberLookup (ec, type, ".ctor", MemberTypes.Constructor,
+ AllBindingFlags, loc);
if (!(ml is MethodGroupExpr)){
report118 (loc, ml, "method group");
return null;
}
- if (Arguments != null) {
- for (int i = arg_count; i > 0;){
- --i;
- Argument a = (Argument) Arguments [i];
-
- if (!a.Resolve (ec, loc))
- return null;
- }
- }
-
method = Invocation.OverloadResolve (ec, (MethodGroupExpr) ml, Arguments, loc);
-
+
if (method == null) {
Report.Error (-6, loc, "New invocation: Can not find a constructor for " +
"this argument list");
} else {
- ModuleBuilder mb = ec.TypeContainer.RootContext.ModuleBuilder;
+ ModuleBuilder mb = RootContext.ModuleBuilder;
ArrayList args = new ArrayList ();
if (Arguments != null){
--i;
Argument a = (Argument) Arguments [i];
- if (!a.Resolve (ec, loc))
- return null;
-
args.Add (a.Type);
}
}
method = mb.GetArrayMethod (type, ".ctor", CallingConventions.HasThis, null,
arg_types);
-
+
if (method == null) {
Report.Error (-6, loc, "New invocation: Can not find a constructor for " +
"this argument list");
{
int factor;
byte [] data;
-
+ byte [] element;
int count = ArrayData.Count;
- if (underlying_type == TypeManager.int32_type ||
- underlying_type == TypeManager.uint32_type ||
- underlying_type == TypeManager.float_type)
- factor = 4;
- else if (underlying_type == TypeManager.int64_type ||
- underlying_type == TypeManager.uint64_type ||
- underlying_type == TypeManager.double_type)
- factor = 8;
- else if (underlying_type == TypeManager.byte_type ||
- underlying_type == TypeManager.sbyte_type ||
- underlying_type == TypeManager.char_type ||
- underlying_type == TypeManager.bool_type)
- factor = 1;
- else if (underlying_type == TypeManager.short_type ||
- underlying_type == TypeManager.ushort_type)
- factor = 2;
- else {
- Report.Error (-100, loc, "Unhandled type in MakeByteBlob!!");
+ factor = GetTypeSize (underlying_type);
+ if (factor == 0)
return null;
- }
- data = new byte [count * factor];
+ data = new byte [(count * factor + 4) & ~3];
+ int idx = 0;
for (int i = 0; i < count; ++i) {
+ object v = ArrayData [i];
+
+ if (v is EnumConstant)
+ v = ((EnumConstant) v).Child;
- if (underlying_type == TypeManager.int64_type ||
- underlying_type == TypeManager.uint64_type){
- long val = (long) ArrayData [i];
+ if (v is Constant && !(v is StringConstant))
+ v = ((Constant) v).GetValue ();
+ else {
+ idx += factor;
+ continue;
+ }
+
+ if (underlying_type == TypeManager.int64_type){
+ if (!(v is Expression)){
+ long val = (long) v;
+
+ for (int j = 0; j < factor; ++j) {
+ data [idx + j] = (byte) (val & 0xFF);
+ val = (val >> 8);
+ }
+ }
+ } else if (underlying_type == TypeManager.uint64_type){
+ if (!(v is Expression)){
+ ulong val = (ulong) v;
- for (int j = 0; j < factor; ++j) {
- data [(i * factor) + j] = (byte) (val & 0xFF);
- val = val >> 8;
+ for (int j = 0; j < factor; ++j) {
+ data [idx + j] = (byte) (val & 0xFF);
+ val = (val >> 8);
+ }
}
-
} else if (underlying_type == TypeManager.float_type) {
-
- // FIXME : How does one get the bits out ?
-
+ if (!(v is Expression)){
+ element = BitConverter.GetBytes ((float) v);
+
+ for (int j = 0; j < factor; ++j)
+ data [idx + j] = element [j];
+ }
} else if (underlying_type == TypeManager.double_type) {
+ if (!(v is Expression)){
+ element = BitConverter.GetBytes ((double) v);
- // FIXME : Same here. '&' and '>>' don't work !
-
-
- } else {
- int val = (int) ArrayData [i];
-
- for (int j = 0; j < factor; ++j) {
- data [(i * factor) + j] = (byte) (val & 0xFF);
- val = val >> 8;
+ for (int j = 0; j < factor; ++j)
+ data [idx + j] = element [j];
}
- }
+ } else if (underlying_type == TypeManager.char_type){
+ if (!(v is Expression)){
+ int val = (int) ((char) v);
+
+ data [idx] = (byte) (val & 0xff);
+ data [idx+1] = (byte) (val >> 8);
+ }
+ } else if (underlying_type == TypeManager.short_type){
+ if (!(v is Expression)){
+ int val = (int) ((short) v);
+
+ data [idx] = (byte) (val & 0xff);
+ data [idx+1] = (byte) (val >> 8);
+ }
+ } else if (underlying_type == TypeManager.ushort_type){
+ if (!(v is Expression)){
+ int val = (int) ((ushort) v);
+
+ data [idx] = (byte) (val & 0xff);
+ data [idx+1] = (byte) (val >> 8);
+ }
+ } else if (underlying_type == TypeManager.int32_type) {
+ if (!(v is Expression)){
+ int val = (int) v;
+
+ data [idx] = (byte) (val & 0xff);
+ data [idx+1] = (byte) ((val >> 8) & 0xff);
+ data [idx+2] = (byte) ((val >> 16) & 0xff);
+ data [idx+3] = (byte) (val >> 24);
+ }
+ } else if (underlying_type == TypeManager.uint32_type) {
+ if (!(v is Expression)){
+ uint val = (uint) v;
+
+ data [idx] = (byte) (val & 0xff);
+ data [idx+1] = (byte) ((val >> 8) & 0xff);
+ data [idx+2] = (byte) ((val >> 16) & 0xff);
+ data [idx+3] = (byte) (val >> 24);
+ }
+ } else if (underlying_type == TypeManager.sbyte_type) {
+ if (!(v is Expression)){
+ sbyte val = (sbyte) v;
+ data [idx] = (byte) val;
+ }
+ } else if (underlying_type == TypeManager.byte_type) {
+ if (!(v is Expression)){
+ byte val = (byte) v;
+ data [idx] = (byte) val;
+ }
+ } else
+ throw new Exception ("Unrecognized type in MakeByteBlob");
+
+ idx += factor;
}
return data;
}
-
- public override void Emit (EmitContext ec)
+
+ //
+ // Emits the initializers for the array
+ //
+ void EmitStaticInitializers (EmitContext ec, bool is_expression)
{
+ //
+ // First, the static data
+ //
+ FieldBuilder fb;
ILGenerator ig = ec.ig;
- if (IsOneDimensional) {
- Invocation.EmitArguments (ec, null, Arguments);
- ig.Emit (OpCodes.Newarr, array_element_type);
-
- } else {
- Invocation.EmitArguments (ec, null, Arguments);
-
- if (IsBuiltinType)
- ig.Emit (OpCodes.Newobj, (ConstructorInfo) method);
- else
- ig.Emit (OpCodes.Newobj, (MethodInfo) method);
+ byte [] data = MakeByteBlob (ArrayData, underlying_type, loc);
+
+ if (data != null) {
+ fb = RootContext.MakeStaticData (data);
+
+ if (is_expression)
+ ig.Emit (OpCodes.Dup);
+ ig.Emit (OpCodes.Ldtoken, fb);
+ ig.Emit (OpCodes.Call,
+ TypeManager.void_initializearray_array_fieldhandle);
}
+ }
+
+ //
+ // Emits pieces of the array that can not be computed at compile
+ // time (variables and string locations).
+ //
+ // This always expect the top value on the stack to be the array
+ //
+ void EmitDynamicInitializers (EmitContext ec, bool is_expression)
+ {
+ ILGenerator ig = ec.ig;
+ int dims = Bounds.Count;
+ int [] current_pos = new int [dims];
+ int top = ArrayData.Count;
+ LocalBuilder temp = ig.DeclareLocal (type);
- if (Initializers != null) {
+ ig.Emit (OpCodes.Stloc, temp);
- if (underlying_type != TypeManager.string_type) {
- FieldBuilder fb;
-
- byte [] data = MakeByteBlob (ArrayData, underlying_type, loc);
-
- if (data != null) {
- fb = ec.TypeContainer.RootContext.MakeStaticData (data);
-
- ig.Emit (OpCodes.Dup);
- ig.Emit (OpCodes.Ldtoken, fb);
- ig.Emit (OpCodes.Call, TypeManager.void_initializearray_array_fieldhandle);
- }
- }
+ MethodInfo set = null;
- //for (int i = 0; i < ArrayExprs.Count; ++i) {
-// Expression e = (Expression) ArrayExprs [i];
+ if (dims != 1){
+ Type [] args;
+ ModuleBuilder mb = null;
+ mb = RootContext.ModuleBuilder;
+ args = new Type [dims + 1];
-// if (e is Literal && !(e is StringLiteral))
-// continue;
+ int j;
+ for (j = 0; j < dims; j++)
+ args [j] = TypeManager.int32_type;
-// Expression elem_access = GenerateAccessExpr (i);
-// elem_access = elem_access.Resolve (ec);
+ args [j] = array_element_type;
+
+ set = mb.GetArrayMethod (
+ type, "Set",
+ CallingConventions.HasThis | CallingConventions.Standard,
+ TypeManager.void_type, args);
+ }
+
+ for (int i = 0; i < top; i++){
-// if (elem_access == null)
-// return;
-
-// Expression assign = new Assign (elem_access, e, loc);
+ Expression e = null;
-// assign = assign.Resolve (ec);
+ if (ArrayData [i] is Expression)
+ e = (Expression) ArrayData [i];
+
+ if (e != null) {
+ //
+ // Basically we do this for string literals and
+ // other non-literal expressions
+ //
+ if (e is StringConstant || !(e is Constant) || num_automatic_initializers <= 2) {
-// if (assign == null)
-// return;
+ ig.Emit (OpCodes.Ldloc, temp);
-// assign.Emit (ec);
-// }
+ for (int idx = dims; idx > 0; ) {
+ idx--;
+ IntConstant.EmitInt (ig, current_pos [idx]);
+ }
+
+ e.Emit (ec);
+
+ if (dims == 1)
+ ArrayAccess.EmitStoreOpcode (ig, array_element_type);
+ else
+ ig.Emit (OpCodes.Call, set);
+
+ }
+ }
+
+ //
+ // Advance counter
+ //
+ for (int j = 0; j < dims; j++){
+ current_pos [j]++;
+ if (current_pos [j] < (int) Bounds [j])
+ break;
+ current_pos [j] = 0;
+ }
}
+
+ if (is_expression)
+ ig.Emit (OpCodes.Ldloc, temp);
}
- Expression GenerateAccessExpr (int i)
+ void DoEmit (EmitContext ec, bool is_statement)
{
- int n_dims = Bounds.Count;
+ ILGenerator ig = ec.ig;
- int [] indices = new int [n_dims];
-
- for (int j = 0; j < n_dims; ++j) {
- indices [j]++;
-
-
- // FIXME : Please finish me !! I can't be completed by dumb idiots
- // like Ravi !! :-)
+ if (IsOneDimensional) {
+ Invocation.EmitArguments (ec, null, Arguments);
+ ig.Emit (OpCodes.Newarr, array_element_type);
+ } else {
+ Invocation.EmitArguments (ec, null, Arguments);
+
+ if (IsBuiltinType)
+ ig.Emit (OpCodes.Newobj, (ConstructorInfo) method);
+ else
+ ig.Emit (OpCodes.Newobj, (MethodInfo) method);
+ }
+
+ if (Initializers != null){
+ //
+ // FIXME: Set this variable correctly.
+ //
+ bool dynamic_initializers = true;
+
+ if (underlying_type != TypeManager.string_type &&
+ underlying_type != TypeManager.object_type) {
+ if (num_automatic_initializers > 2)
+ EmitStaticInitializers (ec, dynamic_initializers || !is_statement);
+ }
+ if (dynamic_initializers)
+ EmitDynamicInitializers (ec, !is_statement);
}
-
- return null;
}
+ public override void Emit (EmitContext ec)
+ {
+ DoEmit (ec, false);
+ }
+
public override void EmitStatement (EmitContext ec)
{
- Emit (ec);
- ec.ig.Emit (OpCodes.Pop);
+ DoEmit (ec, true);
}
}
return this;
}
- public Expression DoResolveLValue (EmitContext ec)
+ override public Expression DoResolveLValue (EmitContext ec, Expression right_side)
{
DoResolve (ec);
ec.ig.Emit (OpCodes.Starg, 0);
}
- public void AddressOf (EmitContext ec)
+ public void AddressOf (EmitContext ec, AddressOp mode)
{
- ec.ig.Emit (OpCodes.Ldarga_S, (byte) 0);
+ ec.ig.Emit (OpCodes.Ldarg_0);
+
+ // FIMXE
+ // FIGURE OUT WHY LDARG_S does not work
+ //
+ // consider: struct X { int val; int P { set { val = value; }}}
+ //
+ // Yes, this looks very bad. Look at `NOTAS' for
+ // an explanation.
+ // ec.ig.Emit (OpCodes.Ldarga_S, (byte) 0);
}
}
public class TypeOf : Expression {
public readonly string QueriedType;
Type typearg;
+ Location loc;
- public TypeOf (string queried_type)
+ public TypeOf (string queried_type, Location l)
{
QueriedType = queried_type;
+ loc = l;
}
public override Expression DoResolve (EmitContext ec)
{
- typearg = ec.TypeContainer.LookupType (QueriedType, false);
+ typearg = RootContext.LookupType (
+ ec.TypeContainer, QueriedType, false, loc);
if (typearg == null)
return null;
/// </summary>
public class SizeOf : Expression {
public readonly string QueriedType;
+ Type type_queried;
+ Location loc;
- public SizeOf (string queried_type)
+ public SizeOf (string queried_type, Location l)
{
this.QueriedType = queried_type;
+ loc = l;
}
public override Expression DoResolve (EmitContext ec)
{
- // FIXME: Implement;
- throw new Exception ("Unimplemented");
- // return this;
+ type_queried = RootContext.LookupType (
+ ec.TypeContainer, QueriedType, false, loc);
+ if (type_queried == null)
+ return null;
+
+ type = TypeManager.int32_type;
+ eclass = ExprClass.Value;
+ return this;
}
public override void Emit (EmitContext ec)
{
- throw new Exception ("Implement me");
+ int size = GetTypeSize (type_queried);
+
+ if (size == 0)
+ ec.ig.Emit (OpCodes.Sizeof, type_queried);
+ else
+ IntConstant.EmitInt (ec.ig, size);
}
}
}
}
- void error176 (Location loc, string name)
+ static void error176 (Location loc, string name)
{
Report.Error (176, loc, "Static member `" +
name + "' cannot be accessed " +
"with an instance reference, qualify with a " +
"type name instead");
}
-
- public override Expression DoResolve (EmitContext ec)
- {
- //
- // We are the sole users of ResolveWithSimpleName (ie, the only
- // ones that can cope with it
- //
- expr = expr.ResolveWithSimpleName (ec);
- if (expr == null)
- return null;
+ static bool IdenticalNameAndTypeName (EmitContext ec, Expression left_original, Location loc)
+ {
+ if (left_original == null)
+ return false;
- if (expr is SimpleName){
- SimpleName child_expr = (SimpleName) expr;
+ if (!(left_original is SimpleName))
+ return false;
- expr = new SimpleName (child_expr.Name + "." + Identifier, loc);
+ SimpleName sn = (SimpleName) left_original;
- return expr.Resolve (ec);
- }
-
- member_lookup = MemberLookup (ec, expr.Type, Identifier, false, loc);
+ Type t = RootContext.LookupType (ec.TypeContainer, sn.Name, true, loc);
+ if (t != null)
+ return true;
- if (member_lookup == null)
- return null;
-
+ return false;
+ }
+
+ public static Expression ResolveMemberAccess (EmitContext ec, Expression member_lookup,
+ Expression left, Location loc,
+ Expression left_original)
+ {
//
// Method Groups
//
if (member_lookup is MethodGroupExpr){
MethodGroupExpr mg = (MethodGroupExpr) member_lookup;
-
+
//
// Type.MethodGroup
//
- if (expr is TypeExpr){
+ if (left is TypeExpr){
if (!mg.RemoveInstanceMethods ()){
SimpleName.Error120 (loc, mg.Methods [0].Name);
return null;
//
// Instance.MethodGroup
//
+ if (IdenticalNameAndTypeName (ec, left_original, loc)){
+ if (mg.RemoveInstanceMethods ())
+ return member_lookup;
+ }
+
if (!mg.RemoveStaticMethods ()){
+ error176 (loc, mg.Methods [0].Name);
+ return null;
+ }
+
+ mg.InstanceExpression = left;
+ return member_lookup;
+#if ORIGINAL
+ if (!mg.RemoveStaticMethods ()){
+ if (IdenticalNameAndTypeName (ec, left_original, loc)){
+ if (!mg.RemoveInstanceMethods ()){
+ SimpleName.Error120 (loc, mg.Methods [0].Name);
+ return null;
+ }
+ return member_lookup;
+ }
+
error176 (loc, mg.Methods [0].Name);
return null;
}
- mg.InstanceExpression = expr;
+ mg.InstanceExpression = left;
return member_lookup;
+#endif
}
if (member_lookup is FieldExpr){
FieldExpr fe = (FieldExpr) member_lookup;
FieldInfo fi = fe.FieldInfo;
+ if (fi is FieldBuilder) {
+ Const c = TypeManager.LookupConstant ((FieldBuilder) fi);
+
+ if (c != null) {
+ object o = c.LookupConstantValue (ec);
+ object real_value = ((Constant) c.Expr).GetValue ();
+
+ return Constantify (real_value, fi.FieldType);
+ }
+ }
+
if (fi.IsLiteral) {
Type t = fi.FieldType;
Type decl_type = fi.DeclaringType;
o = fi.GetValue (fi);
if (decl_type.IsSubclassOf (TypeManager.enum_type)) {
- Expression enum_member = MemberLookup (ec, decl_type, "value__",
- false, loc);
+ Expression enum_member = MemberLookup (
+ ec, decl_type, "value__", MemberTypes.Field,
+ AllBindingFlags, loc);
Enum en = TypeManager.LookupEnum (decl_type);
- Expression e;
+ Constant c;
if (en != null)
- e = Literalize (o, en.UnderlyingType);
+ c = Constantify (o, en.UnderlyingType);
else
- e = Literalize (o, enum_member.Type);
+ c = Constantify (o, enum_member.Type);
- e.Resolve (ec);
- return new EnumLiteral (e, decl_type);
+ return new EnumConstant (c, decl_type);
}
- Expression exp = Literalize (o, t);
- exp.Resolve (ec);
+ Expression exp = Constantify (o, t);
+
+ if (!(left is TypeExpr)) {
+ error176 (loc, fe.FieldInfo.Name);
+ return null;
+ }
return exp;
}
+
+ if (fi.FieldType.IsPointer && !ec.InUnsafe){
+ UnsafeError (loc);
+ return null;
+ }
- if (expr is TypeExpr){
+ if (left is TypeExpr){
+ // and refers to a type name or an
if (!fe.FieldInfo.IsStatic){
error176 (loc, fe.FieldInfo.Name);
return null;
return member_lookup;
} else {
if (fe.FieldInfo.IsStatic){
+ if (IdenticalNameAndTypeName (ec, left_original, loc))
+ return member_lookup;
+
error176 (loc, fe.FieldInfo.Name);
return null;
}
- fe.InstanceExpression = expr;
+ fe.InstanceExpression = left;
return fe;
}
if (member_lookup is PropertyExpr){
PropertyExpr pe = (PropertyExpr) member_lookup;
- if (expr is TypeExpr){
+ if (left is TypeExpr){
if (!pe.IsStatic){
SimpleName.Error120 (loc, pe.PropertyInfo.Name);
return null;
return pe;
} else {
if (pe.IsStatic){
+ if (IdenticalNameAndTypeName (ec, left_original, loc))
+ return member_lookup;
error176 (loc, pe.PropertyInfo.Name);
return null;
}
- pe.InstanceExpression = expr;
-
+ pe.InstanceExpression = left;
+
return pe;
}
}
+
+ if (member_lookup is EventExpr) {
+
+ EventExpr ee = (EventExpr) member_lookup;
+
+ //
+ // If the event is local to this class, we transform ourselves into
+ // a FieldExpr
+ //
+
+ Expression ml = MemberLookup (
+ ec, ec.TypeContainer.TypeBuilder,
+ ee.EventInfo.Name, MemberTypes.Event, AllBindingFlags, loc);
+
+ if (ml != null) {
+ MemberInfo mi = ec.TypeContainer.GetFieldFromEvent ((EventExpr) ml);
+
+ if (mi == null) {
+ //
+ // If this happens, then we have an event with its own
+ // accessors and private field etc so there's no need
+ // to transform ourselves : we should instead flag an error
+ //
+ Assign.error70 (ee.EventInfo, loc);
+ return null;
+ }
+
+ ml = ExprClassFromMemberInfo (ec, mi, loc);
+
+ if (ml == null) {
+ Report.Error (-200, loc, "Internal error!!");
+ return null;
+ }
+ return ResolveMemberAccess (ec, ml, left, loc, left_original);
+ }
+
+ if (left is TypeExpr) {
+ if (!ee.IsStatic) {
+ SimpleName.Error120 (loc, ee.EventInfo.Name);
+ return null;
+ }
+
+ return ee;
+
+ } else {
+ if (ee.IsStatic) {
+ if (IdenticalNameAndTypeName (ec, left_original, loc))
+ return ee;
+
+ error176 (loc, ee.EventInfo.Name);
+ return null;
+ }
+
+ ee.InstanceExpression = left;
+
+ return ee;
+ }
+ }
+
+ if (member_lookup is TypeExpr){
+ member_lookup.Resolve (ec);
+ return member_lookup;
+ }
- Console.WriteLine ("Support for [" + member_lookup + "] is not present yet");
+ Console.WriteLine ("Left is: " + left);
+ Report.Error (-100, loc, "Support for [" + member_lookup + "] is not present yet");
Environment.Exit (0);
return null;
}
+
+ public override Expression DoResolve (EmitContext ec)
+ {
+ //
+ // We are the sole users of ResolveWithSimpleName (ie, the only
+ // ones that can cope with it
+ //
+ Expression original = expr;
+ expr = expr.ResolveWithSimpleName (ec);
+
+ if (expr == null)
+ return null;
+
+ if (expr is SimpleName){
+ SimpleName child_expr = (SimpleName) expr;
+
+ expr = new SimpleName (child_expr.Name + "." + Identifier, loc);
+
+ return expr.ResolveWithSimpleName (ec);
+ }
+
+ //
+ // TODO: I mailed Ravi about this, and apparently we can get rid
+ // of this and put it in the right place.
+ //
+ // Handle enums here when they are in transit.
+ // Note that we cannot afford to hit MemberLookup in this case because
+ // it will fail to find any members at all
+ //
+
+ Type expr_type = expr.Type;
+ if ((expr is TypeExpr) && (expr_type.IsSubclassOf (TypeManager.enum_type))){
+
+ Enum en = TypeManager.LookupEnum (expr_type);
+
+ if (en != null) {
+ object value = en.LookupEnumValue (ec, Identifier, loc);
+
+ if (value != null){
+ Constant c = Constantify (value, en.UnderlyingType);
+ return new EnumConstant (c, expr_type);
+ }
+ }
+ }
+
+ if (expr_type.IsPointer){
+ Report.Error (23, loc,
+ "The `.' operator can not be applied to pointer operands (" +
+ TypeManager.CSharpName (expr_type) + ")");
+ return null;
+ }
+
+ member_lookup = MemberLookup (ec, expr_type, Identifier, loc);
+
+ if (member_lookup == null){
+ Report.Error (117, loc, "`" + expr_type + "' does not contain a " +
+ "definition for `" + Identifier + "'");
+
+ return null;
+ }
+
+ return ResolveMemberAccess (ec, member_lookup, expr, loc, original);
+ }
public override void Emit (EmitContext ec)
{
- throw new Exception ("Should not happen I think");
+ throw new Exception ("Should not happen");
}
}
public override Expression DoResolve (EmitContext ec)
{
- Expr = Expr.Resolve (ec);
+ bool last_const_check = ec.ConstantCheckState;
+ ec.ConstantCheckState = true;
+ Expr = Expr.Resolve (ec);
+ ec.ConstantCheckState = last_const_check;
+
if (Expr == null)
return null;
- eclass = Expr.ExprClass;
+ eclass = Expr.eclass;
type = Expr.Type;
return this;
}
public override void Emit (EmitContext ec)
{
bool last_check = ec.CheckState;
+ bool last_const_check = ec.ConstantCheckState;
ec.CheckState = true;
+ ec.ConstantCheckState = true;
Expr.Emit (ec);
ec.CheckState = last_check;
+ ec.ConstantCheckState = last_const_check;
}
}
public override Expression DoResolve (EmitContext ec)
{
+ bool last_const_check = ec.ConstantCheckState;
+
+ ec.ConstantCheckState = false;
Expr = Expr.Resolve (ec);
+ ec.ConstantCheckState = last_const_check;
if (Expr == null)
return null;
- eclass = Expr.ExprClass;
+ eclass = Expr.eclass;
type = Expr.Type;
return this;
}
public override void Emit (EmitContext ec)
{
bool last_check = ec.CheckState;
+ bool last_const_check = ec.ConstantCheckState;
ec.CheckState = false;
+ ec.ConstantCheckState = false;
Expr.Emit (ec);
ec.CheckState = last_check;
+ ec.ConstantCheckState = last_const_check;
}
}
/// <summary>
- /// An Element Access expression. During semantic
- /// analysis these are transformed into IndexerAccess or
- /// ArrayAccess expressions
+ /// An Element Access expression.
+ ///
+ /// During semantic analysis these are transformed into
+ /// IndexerAccess or ArrayAccess
/// </summary>
public class ElementAccess : Expression {
public ArrayList Arguments;
{
Expr = e;
+ loc = l;
+
+ if (e_list == null)
+ return;
+
Arguments = new ArrayList ();
foreach (Expression tmp in e_list)
Arguments.Add (new Argument (tmp, Argument.AType.Expression));
- loc = l;
}
bool CommonResolve (EmitContext ec)
return true;
}
-
+
+ Expression MakePointerAccess ()
+ {
+ Type t = Expr.Type;
+
+ if (t == TypeManager.void_ptr_type){
+ Report.Error (
+ 242, loc,
+ "The array index operation is not valid for void pointers");
+ return null;
+ }
+ if (Arguments.Count != 1){
+ Report.Error (
+ 196, loc,
+ "A pointer must be indexed by a single value");
+ return null;
+ }
+ Expression p = new PointerArithmetic (true, Expr, ((Argument)Arguments [0]).Expr, t);
+ return new Indirection (p);
+ }
+
public override Expression DoResolve (EmitContext ec)
{
if (!CommonResolve (ec))
//
// I am experimenting with this pattern.
//
- if (Expr.Type.IsSubclassOf (TypeManager.array_type))
+ Type t = Expr.Type;
+
+ if (t.IsSubclassOf (TypeManager.array_type))
return (new ArrayAccess (this)).Resolve (ec);
+ else if (t.IsPointer)
+ return MakePointerAccess ();
else
return (new IndexerAccess (this)).Resolve (ec);
}
if (!CommonResolve (ec))
return null;
- if (Expr.Type.IsSubclassOf (TypeManager.array_type))
+ Type t = Expr.Type;
+ if (t.IsSubclassOf (TypeManager.array_type))
return (new ArrayAccess (this)).ResolveLValue (ec, right_side);
+ else if (t.IsPointer)
+ return MakePointerAccess ();
else
return (new IndexerAccess (this)).ResolveLValue (ec, right_side);
}
/// <summary>
/// Implements array access
/// </summary>
- public class ArrayAccess : Expression, IAssignMethod {
+ public class ArrayAccess : Expression, IAssignMethod, IMemoryLocation {
//
// Points to our "data" repository
//
public override Expression DoResolve (EmitContext ec)
{
- if (ea.Expr.ExprClass != ExprClass.Variable) {
+ if (ea.Expr.eclass != ExprClass.Variable) {
report118 (ea.loc, ea.Expr, "variable");
return null;
}
Type t = ea.Expr.Type;
-
if (t.GetArrayRank () != ea.Arguments.Count){
Report.Error (22, ea.loc,
"Incorrect number of indexes for array " +
return null;
}
type = t.GetElementType ();
+ if (type.IsPointer && !ec.InUnsafe){
+ UnsafeError (ea.loc);
+ return null;
+ }
+
eclass = ExprClass.Variable;
return this;
/// </summary>
static public void EmitLoadOpcode (ILGenerator ig, Type type)
{
- if (type == TypeManager.byte_type)
+ if (type == TypeManager.byte_type || type == TypeManager.bool_type)
ig.Emit (OpCodes.Ldelem_I1);
else if (type == TypeManager.sbyte_type)
ig.Emit (OpCodes.Ldelem_U1);
ig.Emit (OpCodes.Ldelem_R8);
else if (type == TypeManager.intptr_type)
ig.Emit (OpCodes.Ldelem_I);
- else
+ else if (type.IsValueType){
+ ig.Emit (OpCodes.Ldelema, type);
+ ig.Emit (OpCodes.Ldobj, type);
+ } else
ig.Emit (OpCodes.Ldelem_Ref);
}
/// </summary>
static public void EmitStoreOpcode (ILGenerator ig, Type t)
{
- if (t == TypeManager.byte_type || t == TypeManager.sbyte_type)
+ if (t == TypeManager.byte_type || t == TypeManager.sbyte_type ||
+ t == TypeManager.bool_type)
ig.Emit (OpCodes.Stelem_I1);
- else if (t == TypeManager.short_type || t == TypeManager.ushort_type)
+ else if (t == TypeManager.short_type || t == TypeManager.ushort_type || t == TypeManager.char_type)
ig.Emit (OpCodes.Stelem_I2);
else if (t == TypeManager.int32_type || t == TypeManager.uint32_type)
ig.Emit (OpCodes.Stelem_I4);
ig.Emit (OpCodes.Stelem_R8);
else if (t == TypeManager.intptr_type)
ig.Emit (OpCodes.Stelem_I);
+ else if (t.IsValueType)
+ ig.Emit (OpCodes.Stobj, t);
else
ig.Emit (OpCodes.Stelem_Ref);
}
+
+ MethodInfo FetchGetMethod ()
+ {
+ ModuleBuilder mb = RootContext.ModuleBuilder;
+ Type [] args = new Type [ea.Arguments.Count];
+ MethodInfo get;
+
+ int i = 0;
+
+ foreach (Argument a in ea.Arguments)
+ args [i++] = a.Type;
+
+ get = mb.GetArrayMethod (
+ ea.Expr.Type, "Get",
+ CallingConventions.HasThis |
+ CallingConventions.Standard,
+ type, args);
+ return get;
+ }
+
+
+ MethodInfo FetchAddressMethod ()
+ {
+ ModuleBuilder mb = RootContext.ModuleBuilder;
+ Type [] args = new Type [ea.Arguments.Count];
+ MethodInfo address;
+ string ptr_type_name;
+ Type ret_type;
+ int i = 0;
+
+ ptr_type_name = type.FullName + "&";
+ ret_type = Type.GetType (ptr_type_name);
+
+ //
+ // It is a type defined by the source code we are compiling
+ //
+ if (ret_type == null){
+ ret_type = mb.GetType (ptr_type_name);
+ }
+
+ foreach (Argument a in ea.Arguments)
+ args [i++] = a.Type;
+
+ address = mb.GetArrayMethod (
+ ea.Expr.Type, "Address",
+ CallingConventions.HasThis |
+ CallingConventions.Standard,
+ ret_type, args);
+
+ return address;
+ }
public override void Emit (EmitContext ec)
{
if (rank == 1)
EmitLoadOpcode (ig, type);
else {
- ModuleBuilder mb = ec.TypeContainer.RootContext.ModuleBuilder;
- Type [] args = new Type [ea.Arguments.Count];
- MethodInfo get;
-
- int i = 0;
+ MethodInfo method;
- foreach (Argument a in ea.Arguments)
- args [i++] = a.Type;
-
- get = mb.GetArrayMethod (
- ea.Expr.Type, "Get",
- CallingConventions.HasThis |
- CallingConventions.Standard,
- type, args);
-
- ig.Emit (OpCodes.Call, get);
+ method = FetchGetMethod ();
+ ig.Emit (OpCodes.Call, method);
}
}
foreach (Argument a in ea.Arguments)
a.Expr.Emit (ec);
+ Type t = source.Type;
+
+ //
+ // The stobj opcode used by value types will need
+ // an address on the stack, not really an array/array
+ // pair
+ //
+ if (rank == 1){
+ if (t.IsValueType && !TypeManager.IsBuiltinType (t))
+ ig.Emit (OpCodes.Ldelema, t);
+ }
+
source.Emit (ec);
- Type t = source.Type;
if (rank == 1)
EmitStoreOpcode (ig, t);
else {
- ModuleBuilder mb = ec.TypeContainer.RootContext.ModuleBuilder;
+ ModuleBuilder mb = RootContext.ModuleBuilder;
Type [] args = new Type [ea.Arguments.Count + 1];
MethodInfo set;
ig.Emit (OpCodes.Call, set);
}
}
+
+ public void AddressOf (EmitContext ec, AddressOp mode)
+ {
+ int rank = ea.Expr.Type.GetArrayRank ();
+ ILGenerator ig = ec.ig;
+
+ ea.Expr.Emit (ec);
+
+ foreach (Argument a in ea.Arguments)
+ a.Expr.Emit (ec);
+
+ if (rank == 1){
+ ig.Emit (OpCodes.Ldelema, type);
+ } else {
+ MethodInfo address = FetchAddressMethod ();
+ ig.Emit (OpCodes.Call, address);
+ }
+ }
}
if (ilist == null)
ilist = Indexers.GetIndexersForType (
- indexer_type, ec.TypeContainer.RootContext.TypeManager, ea.loc);
+ indexer_type, RootContext.TypeManager, ea.loc);
//
}
type = get.ReturnType;
+ if (type.IsPointer && !ec.InUnsafe){
+ UnsafeError (ea.loc);
+ return null;
+ }
+
eclass = ExprClass.IndexerAccess;
return this;
}
if (ilist == null)
ilist = Indexers.GetIndexersForType (
- indexer_type, ec.TypeContainer.RootContext.TypeManager, ea.loc);
+ indexer_type, RootContext.TypeManager, ea.loc);
if (ilist != null && ilist.setters != null && ilist.setters.Count > 0){
set_arguments = (ArrayList) ea.Arguments.Clone ();
public override void Emit (EmitContext ec)
{
- Invocation.EmitCall (ec, false, ea.Expr, get, ea.Arguments);
+ Invocation.EmitCall (ec, false, false, ea.Expr, get, ea.Arguments);
}
//
//
public void EmitAssign (EmitContext ec, Expression source)
{
- Invocation.EmitCall (ec, false, ea.Expr, set, set_arguments);
+ Invocation.EmitCall (ec, false, false, ea.Expr, set, set_arguments);
}
}
-
- public class BaseAccess : Expression {
- public enum BaseAccessType : byte {
- Member,
- Indexer
- };
+ /// <summary>
+ /// The base operator for method names
+ /// </summary>
+ public class BaseAccess : Expression {
+ string member;
+ Location loc;
- public readonly BaseAccessType BAType;
- public readonly string Member;
- public readonly ArrayList Arguments;
+ public BaseAccess (string member, Location l)
+ {
+ this.member = member;
+ loc = l;
+ }
- public BaseAccess (BaseAccessType t, string member, ArrayList args)
+ public override Expression DoResolve (EmitContext ec)
{
- BAType = t;
- Member = member;
- Arguments = args;
+ Expression member_lookup;
+ Type current_type = ec.TypeContainer.TypeBuilder;
+ Type base_type = current_type.BaseType;
+ Expression e;
+
+ if (ec.IsStatic){
+ Report.Error (1511, loc,
+ "Keyword base is not allowed in static method");
+ return null;
+ }
+ member_lookup = MemberLookup (ec, base_type, member, loc);
+ if (member_lookup == null)
+ return null;
+
+ Expression left;
+
+ if (ec.IsStatic)
+ left = new TypeExpr (base_type);
+ else
+ left = ec.This;
+
+ e = MemberAccess.ResolveMemberAccess (ec, member_lookup, left, loc, null);
+ if (e is PropertyExpr){
+ PropertyExpr pe = (PropertyExpr) e;
+
+ pe.IsBase = true;
+ }
+
+ return e;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ throw new Exception ("Should never be called");
+ }
+ }
+
+ /// <summary>
+ /// The base indexer operator
+ /// </summary>
+ public class BaseIndexerAccess : Expression {
+ ArrayList Arguments;
+ Location loc;
+
+ public BaseIndexerAccess (ArrayList args, Location l)
+ {
+ Arguments = args;
+ loc = l;
}
public override Expression DoResolve (EmitContext ec)
{
- // FIXME: Implement;
- throw new Exception ("Unimplemented");
- // return this;
+ Type current_type = ec.TypeContainer.TypeBuilder;
+ Type base_type = current_type.BaseType;
+ Expression member_lookup;
+
+ if (ec.IsStatic){
+ Report.Error (1511, loc,
+ "Keyword base is not allowed in static method");
+ return null;
+ }
+
+ member_lookup = MemberLookup (ec, base_type, "get_Item", MemberTypes.Method, AllBindingFlags, loc);
+ if (member_lookup == null)
+ return null;
+
+ return MemberAccess.ResolveMemberAccess (ec, member_lookup, ec.This, loc, null);
}
public override void Emit (EmitContext ec)
{
- throw new Exception ("Unimplemented");
+ throw new Exception ("Should never be called");
}
}
-
+
/// <summary>
/// This class exists solely to pass the Type around and to be a dummy
/// that can be passed to the conversion functions (this is used by
{
// nothing, as we only exist to not do anything.
}
+
+ //
+ // This is just because we might want to reuse this bad boy
+ // instead of creating gazillions of EmptyExpressions.
+ // (CanConvertImplicit uses it)
+ //
+ public void SetType (Type t)
+ {
+ type = t;
+ }
}
public class UserCast : Expression {
ig.Emit (OpCodes.Call, (ConstructorInfo) method);
}
-
}
// <summary>
if (left == null)
return null;
- if (left.ExprClass != ExprClass.Type){
+ if (left.eclass != ExprClass.Type){
report118 (loc, left, "type");
return null;
}
- type = ec.TypeContainer.LookupType (left.Type.FullName + dim, false);
+ type = RootContext.LookupType (
+ ec.TypeContainer, left.Type.FullName + dim, false, loc);
if (type == null)
return null;
+ if (!ec.InUnsafe && type.IsPointer){
+ UnsafeError (loc);
+ return null;
+ }
+
eclass = ExprClass.Type;
return this;
}
throw new Exception ("This should never be called");
}
}
+
+ //
+ // This class is used to represent the address of an array, used
+ // only by the Fixed statement, this is like the C "&a [0]" construct.
+ //
+ public class ArrayPtr : Expression {
+ Expression array;
+
+ public ArrayPtr (Expression array)
+ {
+ Type array_type = array.Type.GetElementType ();
+
+ this.array = array;
+
+ string array_ptr_type_name = array_type.FullName + "*";
+
+ type = Type.GetType (array_ptr_type_name);
+ if (type == null){
+ ModuleBuilder mb = RootContext.ModuleBuilder;
+
+ type = mb.GetType (array_ptr_type_name);
+ }
+
+ eclass = ExprClass.Value;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ ILGenerator ig = ec.ig;
+
+ array.Emit (ec);
+ IntLiteral.EmitInt (ig, 0);
+ ig.Emit (OpCodes.Ldelema, array.Type.GetElementType ());
+ }
+
+ public override Expression DoResolve (EmitContext ec)
+ {
+ //
+ // We are born fully resolved
+ //
+ return this;
+ }
+ }
+
+ //
+ // Used by the fixed statement
+ //
+ public class StringPtr : Expression {
+ LocalBuilder b;
+
+ public StringPtr (LocalBuilder b)
+ {
+ this.b = b;
+ eclass = ExprClass.Value;
+ type = TypeManager.char_ptr_type;
+ }
+
+ public override Expression DoResolve (EmitContext ec)
+ {
+ // This should never be invoked, we are born in fully
+ // initialized state.
+
+ return this;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ ILGenerator ig = ec.ig;
+
+ ig.Emit (OpCodes.Ldloc, b);
+ ig.Emit (OpCodes.Conv_I);
+ ig.Emit (OpCodes.Call, TypeManager.int_get_offset_to_string_data);
+ ig.Emit (OpCodes.Add);
+ }
+ }
+
+ //
+ // Implements the `stackalloc' keyword
+ //
+ public class StackAlloc : Expression {
+ Type otype;
+ string t;
+ Expression count;
+ Location loc;
+
+ public StackAlloc (string type, Expression count, Location l)
+ {
+ t = type;
+ this.count = count;
+ loc = l;
+ }
+
+ public override Expression DoResolve (EmitContext ec)
+ {
+ count = count.Resolve (ec);
+ if (count == null)
+ return null;
+
+ if (count.Type != TypeManager.int32_type){
+ count = ConvertImplicitRequired (ec, count, TypeManager.int32_type, loc);
+ if (count == null)
+ return null;
+ }
+
+ if (ec.InCatch || ec.InFinally){
+ Report.Error (255, loc,
+ "stackalloc can not be used in a catch or finally block");
+ return null;
+ }
+
+ otype = RootContext.LookupType (ec.TypeContainer, t, false, loc);
+
+ if (otype == null)
+ return null;
+
+ if (!TypeManager.VerifyUnManaged (otype, loc))
+ return null;
+
+ string ptr_name = otype.FullName + "*";
+ type = Type.GetType (ptr_name);
+ if (type == null){
+ ModuleBuilder mb = RootContext.ModuleBuilder;
+
+ type = mb.GetType (ptr_name);
+ }
+ eclass = ExprClass.Value;
+
+ return this;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ int size = GetTypeSize (otype);
+ ILGenerator ig = ec.ig;
+
+ if (size == 0)
+ ig.Emit (OpCodes.Sizeof, otype);
+ else
+ IntConstant.EmitInt (ig, size);
+ count.Emit (ec);
+ ig.Emit (OpCodes.Mul);
+ ig.Emit (OpCodes.Localloc);
+ }
+ }
}
projects / mono.git / blobdiff