//
// (C) 2001 Ximian, Inc.
//
+//
+// Ideas:
+// Maybe we should make Resolve be an instance method that just calls
+// the virtual DoResolve function and checks conditions like the eclass
+// and type being set if a non-null value is returned. For robustness
+// purposes.
+//
+
namespace CIR {
+ using System;
using System.Collections;
using System.Diagnostics;
- using System;
using System.Reflection;
using System.Reflection.Emit;
-
+ using System.Text;
+
// <remarks>
// The ExprClass class contains the is used to pass the
// classification of an expression (value, variable, namespace,
public enum ExprClass {
Invalid,
- Value, Variable, Namespace, Type,
- MethodGroup, PropertyAccess,
- EventAccess, IndexerAccess, Nothing,
+ Value,
+ Variable, // Every Variable should implement LValue
+ Namespace,
+ Type,
+ MethodGroup,
+ PropertyAccess,
+ EventAccess,
+ IndexerAccess,
+ Nothing,
}
// <remarks>
}
}
- public abstract Expression Resolve (TypeContainer tc);
+ // <summary>
+ // Utility wrapper routine for Error, just to beautify the code
+ // </summary>
+ static protected void Error (TypeContainer tc, int error, string s)
+ {
+ tc.RootContext.Report.Error (error, s);
+ }
+
+ static protected void Error (TypeContainer tc, int error, Location l, string s)
+ {
+ tc.RootContext.Report.Error (error, l, s);
+ }
+
+ // <summary>
+ // Utility wrapper routine for Warning, just to beautify the code
+ // </summary>
+ static protected void Warning (TypeContainer tc, int warning, string s)
+ {
+ tc.RootContext.Report.Warning (warning, s);
+ }
+
+ // <summary>
+ // Performs semantic analysis on the Expression
+ // </summary>
+ //
+ // <remarks>
+ // The Resolve method is invoked to perform the semantic analysis
+ // on the node.
+ //
+ // The return value is an expression (it can be the
+ // same expression in some cases) or a new
+ // expression that better represents this node.
+ //
+ // For example, optimizations of Unary (LiteralInt)
+ // would return a new LiteralInt with a negated
+ // value.
+ //
+ // If there is an error during semantic analysis,
+ // then an error should
+ // be reported (using TypeContainer.RootContext.Report) and a null
+ // value should be returned.
+ //
+ // There are two side effects expected from calling
+ // Resolve(): the the field variable "eclass" should
+ // be set to any value of the enumeration
+ // `ExprClass' and the type variable should be set
+ // to a valid type (this is the type of the
+ // expression).
+ // </remarks>
+
+ public abstract Expression DoResolve (TypeContainer tc);
+
+
+ //
+ // Currently Resolve wraps DoResolve to perform sanity
+ // checking and assertion checking on what we expect from Resolve
+ //
+
+ public Expression Resolve (TypeContainer tc)
+ {
+ Expression e = DoResolve (tc);
+
+ if (e != null){
+ if (e.ExprClass == ExprClass.Invalid)
+ throw new Exception ("Expression " + e +
+ " ExprClass is Invalid after resolve");
+
+ if (e.ExprClass != ExprClass.MethodGroup)
+ if (e.type == null)
+ throw new Exception ("Expression " + e +
+ " did not set its type after Resolve");
+ }
+
+ return e;
+ }
+
+ // <summary>
+ // Emits the code for the expression
+ // </summary>
+ //
+ // <remarks>
+ //
+ // The Emit method is invoked to generate the code
+ // for the expression.
+ //
+ // </remarks>
public abstract void Emit (EmitContext ec);
// <summary>
type = null;
}
+ // <summary>
+ // Returns a literalized version of a literal FieldInfo
+ // </summary>
+ static Expression Literalize (FieldInfo fi)
+ {
+ Type t = fi.FieldType;
+ object v = fi.GetValue (fi);
+
+ if (t == TypeManager.int32_type)
+ return new IntLiteral ((int) v);
+ else if (t == TypeManager.uint32_type)
+ return new UIntLiteral ((uint) v);
+ else if (t == TypeManager.int64_type)
+ return new LongLiteral ((long) v);
+ else if (t == TypeManager.uint64_type)
+ return new ULongLiteral ((ulong) v);
+ else if (t == TypeManager.float_type)
+ return new FloatLiteral ((float) v);
+ else if (t == TypeManager.double_type)
+ return new DoubleLiteral ((double) v);
+ else if (t == TypeManager.string_type)
+ return new StringLiteral ((string) v);
+ else if (t == TypeManager.short_type)
+ return new IntLiteral ((int) ((short)v));
+ else if (t == TypeManager.ushort_type)
+ return new IntLiteral ((int) ((ushort)v));
+ else if (t == TypeManager.sbyte_type)
+ return new IntLiteral ((int) ((sbyte)v));
+ else if (t == TypeManager.byte_type)
+ return new IntLiteral ((int) ((byte)v));
+ else if (t == TypeManager.char_type)
+ return new IntLiteral ((int) ((char)v));
+ else
+ throw new Exception ("Unknown type for literal (" + v.GetType () +
+ "), details: " + fi);
+ }
+
//
// Returns a fully formed expression after a MemberLookup
//
- static Expression ExprClassFromMemberInfo (MemberInfo mi)
+ static Expression ExprClassFromMemberInfo (TypeContainer tc, MemberInfo mi)
{
if (mi is EventInfo){
return new EventExpr ((EventInfo) mi);
} else if (mi is FieldInfo){
- return new FieldExpr ((FieldInfo) mi);
+ FieldInfo fi = (FieldInfo) mi;
+
+ if (fi.IsLiteral){
+ Expression e = Literalize (fi);
+ e.Resolve (tc);
+
+ return e;
+ } else
+ return new FieldExpr (fi);
} else if (mi is PropertyInfo){
return new PropertyExpr ((PropertyInfo) mi);
} else if (mi is Type)
// This is so we can catch correctly attempts to invoke instance methods
// from a static body (scan for error 120 in ResolveSimpleName).
//
- public static Expression MemberLookup (RootContext rc, Type t, string name,
- bool same_type, MemberTypes mt, BindingFlags bf)
+ public static Expression MemberLookup (TypeContainer tc, Type t, string name,
+ bool same_type, MemberTypes mt, BindingFlags bf)
{
if (same_type)
bf |= BindingFlags.NonPublic;
- MemberInfo [] mi = rc.TypeManager.FindMembers (t, mt, bf, Type.FilterName, name);
+ MemberInfo [] mi = tc.RootContext.TypeManager.FindMembers (
+ t, mt, bf, Type.FilterName, name);
if (mi == null)
return null;
if (mi.Length == 1 && !(mi [0] is MethodBase))
- return Expression.ExprClassFromMemberInfo (mi [0]);
+ return Expression.ExprClassFromMemberInfo (tc, mi [0]);
for (int i = 0; i < mi.Length; i++)
if (!(mi [i] is MethodBase)){
- rc.Report.Error (-5, "Do not know how to reproduce this case: " +
- "Methods and non-Method with the same name, report this please");
+ Error (tc,
+ -5, "Do not know how to reproduce this case: " +
+ "Methods and non-Method with the same name, " +
+ "report this please");
for (i = 0; i < mi.Length; i++){
Type tt = mi [i].GetType ();
BindingFlags.Static |
BindingFlags.Instance;
- public static Expression MemberLookup (RootContext rc, Type t, string name,
- bool same_type)
+ public static Expression MemberLookup (TypeContainer tc, Type t, string name,
+ bool same_type)
{
- return MemberLookup (rc, t, name, same_type, AllMemberTypes, AllBindingsFlags);
+ return MemberLookup (tc, t, name, same_type, AllMemberTypes, AllBindingsFlags);
}
-
- // <summary>
- // Resolves the E in `E.I' side for a member_access
- //
- // This is suboptimal and should be merged with ResolveMemberAccess
- static Expression ResolvePrimary (TypeContainer tc, string name)
- {
- int dot_pos = name.LastIndexOf (".");
-
- if (tc.RootContext.IsNamespace (name))
- return new NamespaceExpr (name);
-
- if (dot_pos != -1){
- } else {
- Type t = tc.LookupType (name, false);
-
- if (t != null)
- return new TypeExpr (t);
- }
- return null;
- }
-
+ //
+ // I am in general unhappy with this implementation.
+ //
+ // I need to revise this.
+ //
static public Expression ResolveMemberAccess (TypeContainer tc, string name)
{
- Expression left_e;
+ Expression left_e = null;
int dot_pos = name.LastIndexOf (".");
string left = name.Substring (0, dot_pos);
string right = name.Substring (dot_pos + 1);
+ Type t;
+
+ if ((t = tc.LookupType (left, false)) != null){
+ Expression e;
+
+ left_e = new TypeExpr (t);
+ e = new MemberAccess (left_e, right);
+ return e.Resolve (tc);
+ } else {
+ //
+ // FIXME: IMplement:
+
+ // Handle here:
+ // T.P Static property access (P) on Type T.
+ // e.P instance property access on instance e for P.
+ // p
+ //
+ }
- left_e = ResolvePrimary (tc, left);
- if (left_e == null)
+ if (left_e == null){
+ Error (tc, 246, "Can not find type or namespace `"+left+"'");
return null;
+ }
switch (left_e.ExprClass){
case ExprClass.Type:
- return MemberLookup (tc.RootContext,
+ return MemberLookup (tc,
left_e.Type, right,
left_e.Type == tc.TypeBuilder);
case ExprClass.EventAccess:
case ExprClass.MethodGroup:
case ExprClass.Invalid:
- tc.RootContext.Report.Error (-1000,
- "Internal compiler error, should have " +
- "got these handled before");
- break;
+ throw new Exception ("Should have got the " + left_e.ExprClass +
+ " handled before");
}
return null;
static public Expression ImplicitReferenceConversion (Expression expr, Type target_type)
{
Type expr_type = expr.Type;
-
+
if (target_type == TypeManager.object_type) {
if (expr_type.IsClass)
return new EmptyCast (expr, target_type);
if (expr_type.IsValueType)
- return new BoxedCast (expr, target_type);
- } else if (expr_type.IsSubclassOf (target_type))
+ return new BoxedCast (expr);
+ } else if (expr_type.IsSubclassOf (target_type)) {
return new EmptyCast (expr, target_type);
- else
- // FIXME: missing implicit reference conversions:
- //
+ } else {
// from any class-type S to any interface-type T.
+ if (expr_type.IsClass && target_type.IsInterface) {
+ Type [] interfaces = expr_type.FindInterfaces (Module.FilterTypeName,
+ target_type.FullName);
+ if (interfaces != null)
+ return new EmptyCast (expr, target_type);
+ }
+
// from any interface type S to interface-type T.
+ // FIXME : Is it right to use IsAssignableFrom ?
+ if (expr_type.IsInterface && target_type.IsInterface)
+ if (target_type.IsAssignableFrom (expr_type))
+ return new EmptyCast (expr, target_type);
+
+
// from an array-type S to an array-type of type T
+ if (expr_type.IsArray && target_type.IsArray) {
+
+ throw new Exception ("Implement array conversion");
+
+ }
+
// from an array-type to System.Array
+ if (expr_type.IsArray && target_type.IsAssignableFrom (expr_type))
+ return new EmptyCast (expr, target_type);
+
// from any delegate type to System.Delegate
+ if (expr_type.IsSubclassOf (TypeManager.delegate_type) &&
+ target_type == TypeManager.delegate_type)
+ if (target_type.IsAssignableFrom (expr_type))
+ return new EmptyCast (expr, target_type);
+
// from any array-type or delegate type into System.ICloneable.
+ if (expr_type.IsArray || expr_type.IsSubclassOf (TypeManager.delegate_type))
+ if (target_type == TypeManager.cloneable_interface)
+ throw new Exception ("Implement conversion to System.ICloneable");
+
// from the null type to any reference-type.
-
+ // FIXME : How do we do this ?
+
return null;
+ }
+
return null;
}
-
+
// <summary>
- // Converts implicitly the resolved expression `expr' into the
- // `target_type'. It returns a new expression that can be used
- // in a context that expects a `target_type'.
+ // Handles expressions like this: decimal d; d = 1;
+ // and changes them into: decimal d; d = new System.Decimal (1);
// </summary>
- static public Expression ConvertImplicit (Expression expr, Type target_type)
+ static Expression InternalTypeConstructor (TypeContainer tc, Expression expr, Type target)
{
- Type expr_type = expr.Type;
+ ArrayList args = new ArrayList ();
- if (expr_type == target_type){
- Console.WriteLine ("Hey, ConvertImplicit was called with no job to do");
- return expr;
- }
+ args.Add (new Argument (expr, Argument.AType.Expression));
- //
- // Step 1: Perform implicit conversions as found on expr.Type
- //
+ Expression ne = new New (target.FullName, args,
+ new Location (-1));
+ return ne.Resolve (tc);
+ }
+
+ // <summary>
+ // Implicit Numeric Conversions.
+ //
+ // expr is the expression to convert, returns a new expression of type
+ // target_type or null if an implicit conversion is not possible.
+ //
+ // </summary>
+ static public Expression ImplicitNumericConversion (TypeContainer tc, Expression expr,
+ Type target_type, Location l)
+ {
+ Type expr_type = expr.Type;
+
//
- // Step 2: Built-in conversions.
- //
+ // Attempt to do the implicit constant expression conversions
+
+ if (expr is IntLiteral){
+ Expression e;
+
+ e = TryImplicitIntConversion (target_type, (IntLiteral) expr);
+ if (e != null)
+ return e;
+ } else if (expr is LongLiteral){
+ //
+ // Try the implicit constant expression conversion
+ // from long to ulong, instead of a nice routine,
+ // we just inline it
+ //
+ if (((LongLiteral) expr).Value > 0)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I8);
+ }
+
if (expr_type == TypeManager.sbyte_type){
//
// From sbyte to short, int, long, float, double.
if (target_type == TypeManager.int32_type)
return new OpcodeCast (expr, target_type, OpCodes.Conv_I4);
if (target_type == TypeManager.int64_type)
- return new OpcodeCast (expr, target_type, OpCodes.Conv_U8);
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I8);
if (target_type == TypeManager.double_type)
return new OpcodeCast (expr, target_type, OpCodes.Conv_R8);
if (target_type == TypeManager.float_type)
return new OpcodeCast (expr, target_type, OpCodes.Conv_R4);
if (target_type == TypeManager.short_type)
return new OpcodeCast (expr, target_type, OpCodes.Conv_I2);
+ if (target_type == TypeManager.decimal_type)
+ return InternalTypeConstructor (tc, expr, target_type);
} else if (expr_type == TypeManager.byte_type){
//
// From byte to short, ushort, int, uint, long, ulong, float, double
return new OpcodeCast (expr, target_type, OpCodes.Conv_R4);
if (target_type == TypeManager.double_type)
return new OpcodeCast (expr, target_type, OpCodes.Conv_R8);
+ if (target_type == TypeManager.decimal_type)
+ return InternalTypeConstructor (tc, expr, target_type);
} else if (expr_type == TypeManager.short_type){
//
// From short to int, long, float, double
return new OpcodeCast (expr, target_type, OpCodes.Conv_R8);
if (target_type == TypeManager.float_type)
return new OpcodeCast (expr, target_type, OpCodes.Conv_R4);
+ if (target_type == TypeManager.decimal_type)
+ return InternalTypeConstructor (tc, expr, target_type);
} else if (expr_type == TypeManager.ushort_type){
//
// From ushort to int, uint, long, ulong, float, double
//
- if ((target_type == TypeManager.uint32_type) ||
- (target_type == TypeManager.uint64_type))
+ if (target_type == TypeManager.uint32_type)
return new EmptyCast (expr, target_type);
-
+
+ if (target_type == TypeManager.uint64_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U8);
if (target_type == TypeManager.int32_type)
return new OpcodeCast (expr, target_type, OpCodes.Conv_I4);
if (target_type == TypeManager.int64_type)
return new OpcodeCast (expr, target_type, OpCodes.Conv_R8);
if (target_type == TypeManager.float_type)
return new OpcodeCast (expr, target_type, OpCodes.Conv_R4);
+ if (target_type == TypeManager.decimal_type)
+ return InternalTypeConstructor (tc, expr, target_type);
} else if (expr_type == TypeManager.int32_type){
//
// From int to long, float, double
return new OpcodeCast (expr, target_type, OpCodes.Conv_R8);
if (target_type == TypeManager.float_type)
return new OpcodeCast (expr, target_type, OpCodes.Conv_R4);
+ if (target_type == TypeManager.decimal_type)
+ return InternalTypeConstructor (tc, expr, target_type);
} else if (expr_type == TypeManager.uint32_type){
//
// From uint to long, ulong, float, double
//
if (target_type == TypeManager.int64_type)
- return new OpcodeCast (expr, target_type, OpCodes.Conv_I8);
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U8);
if (target_type == TypeManager.uint64_type)
return new OpcodeCast (expr, target_type, OpCodes.Conv_U8);
if (target_type == TypeManager.double_type)
if (target_type == TypeManager.float_type)
return new OpcodeCast (expr, target_type, OpCodes.Conv_R_Un,
OpCodes.Conv_R4);
+ if (target_type == TypeManager.decimal_type)
+ return InternalTypeConstructor (tc, expr, target_type);
} else if ((expr_type == TypeManager.uint64_type) ||
(expr_type == TypeManager.int64_type)){
//
- // From long to float, double
+ // From long/ulong to float, double
//
if (target_type == TypeManager.double_type)
return new OpcodeCast (expr, target_type, OpCodes.Conv_R_Un,
if (target_type == TypeManager.float_type)
return new OpcodeCast (expr, target_type, OpCodes.Conv_R_Un,
OpCodes.Conv_R4);
+ if (target_type == TypeManager.decimal_type)
+ return InternalTypeConstructor (tc, expr, target_type);
} else if (expr_type == TypeManager.char_type){
//
// From char to ushort, int, uint, long, ulong, float, double
return new OpcodeCast (expr, target_type, OpCodes.Conv_R4);
if (target_type == TypeManager.double_type)
return new OpcodeCast (expr, target_type, OpCodes.Conv_R8);
- } else
- return ImplicitReferenceConversion (expr, target_type);
-
-
+ if (target_type == TypeManager.decimal_type)
+ return InternalTypeConstructor (tc, expr, target_type);
+ } else if (expr_type == TypeManager.float_type){
+ //
+ // float to double
+ //
+ if (target_type == TypeManager.double_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_R8);
+ }
- //
- // Could not find an implicit cast.
- //
return null;
}
// <summary>
- // Performs an explicit conversion of the expression `expr' whose
- // type is expr.Type to `target_type'.
+ // User-defined implicit conversions
// </summary>
- static public Expression ConvertExplicit (Expression expr, Type target_type)
+ static public Expression ImplicitUserConversion (TypeContainer tc, Expression source,
+ Type target, Location l)
{
- return expr;
+ Expression mg1, mg2;
+ MethodBase method;
+ ArrayList arguments;
+
+ mg1 = MemberLookup (tc, source.Type, "op_Implicit", false);
+ mg2 = MemberLookup (tc, target, "op_Implicit", false);
+
+ MethodGroupExpr union = Invocation.MakeUnionSet (mg1, mg2);
+
+ if (union != null) {
+ arguments = new ArrayList ();
+ arguments.Add (new Argument (source, Argument.AType.Expression));
+
+ method = Invocation.OverloadResolve (tc, union, arguments, l, true);
+
+ if (method != null) {
+ MethodInfo mi = (MethodInfo) method;
+
+ if (mi.ReturnType == target)
+ return new UserImplicitCast (mi, arguments);
+ }
+ }
+
+ // If we have a boolean type, we need to check for the True
+ // and False operators too.
+
+ if (target == TypeManager.bool_type) {
+
+ mg1 = MemberLookup (tc, source.Type, "op_True", false);
+ mg2 = MemberLookup (tc, target, "op_True", false);
+
+ union = Invocation.MakeUnionSet (mg1, mg2);
+
+ if (union == null)
+ return null;
+
+ arguments = new ArrayList ();
+ arguments.Add (new Argument (source, Argument.AType.Expression));
+
+ method = Invocation.OverloadResolve (tc, union, arguments, l, true);
+ if (method != null) {
+ MethodInfo mi = (MethodInfo) method;
+
+ if (mi.ReturnType == target)
+ return new UserImplicitCast (mi, arguments);
+ }
+ }
+
+ return null;
}
- }
+ // <summary>
+ // Converts implicitly the resolved expression `expr' into the
+ // `target_type'. It returns a new expression that can be used
+ // in a context that expects a `target_type'.
+ // </summary>
+ static public Expression ConvertImplicit (TypeContainer tc, Expression expr,
+ Type target_type, Location l)
+ {
+ Type expr_type = expr.Type;
+ Expression e;
- // <summary>
- // This kind of cast is used to encapsulate the child
- // whose type is child.Type into an expression that is
- // reported to return "return_type". This is used to encapsulate
- // expressions which have compatible types, but need to be dealt
- // at higher levels with.
- //
- // For example, a "byte" expression could be encapsulated in one
- // of these as an "unsigned int". The type for the expression
- // would be "unsigned int".
- //
- // </summary>
-
- public class EmptyCast : Expression {
- protected Expression child;
+ if (expr_type == target_type)
+ return expr;
- public EmptyCast (Expression child, Type return_type)
- {
- ExprClass = child.ExprClass;
- type = return_type;
- this.child = child;
- }
+ e = ImplicitNumericConversion (tc, expr, target_type, l);
+ if (e != null)
+ return e;
- public override Expression Resolve (TypeContainer tc)
- {
- // This should never be invoked, we are born in fully
- // initialized state.
+ e = ImplicitReferenceConversion (expr, target_type);
+ if (e != null)
+ return e;
- return this;
+ e = ImplicitUserConversion (tc, expr, target_type, l);
+ if (e != null)
+ return e;
+
+ if (target_type.IsSubclassOf (TypeManager.enum_type) && expr is IntLiteral){
+ IntLiteral i = (IntLiteral) expr;
+
+ if (i.Value == 0)
+ return new EmptyCast (expr, target_type);
+ }
+ return null;
}
- public override void Emit (EmitContext ec)
+
+ // <summary>
+ // Attempts to apply the `Standard Implicit
+ // Conversion' rules to the expression `expr' into
+ // the `target_type'. It returns a new expression
+ // that can be used in a context that expects a
+ // `target_type'.
+ //
+ // This is different from `ConvertImplicit' in that the
+ // user defined implicit conversions are excluded.
+ // </summary>
+ static public Expression ConvertImplicitStandard (TypeContainer tc, Expression expr,
+ Type target_type, Location l)
{
- child.Emit (ec);
- }
- }
+ Type expr_type = expr.Type;
+ Expression e;
- public class BoxedCast : EmptyCast {
+ if (expr_type == target_type)
+ return expr;
+
+ e = ImplicitNumericConversion (tc, expr, target_type, l);
+ if (e != null)
+ return e;
+
+ e = ImplicitReferenceConversion (expr, target_type);
+ if (e != null)
+ return e;
+
+ if (target_type.IsSubclassOf (TypeManager.enum_type) && expr is IntLiteral){
+ IntLiteral i = (IntLiteral) expr;
- public BoxedCast (Expression expr, Type target_type)
- : base (expr, target_type)
+ if (i.Value == 0)
+ return new EmptyCast (expr, target_type);
+ }
+ return null;
+ }
+ // <summary>
+ // Attemps to perform an implict constant conversion of the IntLiteral
+ // into a different data type using casts (See Implicit Constant
+ // Expression Conversions)
+ // </summary>
+ static protected Expression TryImplicitIntConversion (Type target_type, IntLiteral il)
{
+ int value = il.Value;
+
+ if (target_type == TypeManager.sbyte_type){
+ if (value >= SByte.MinValue && value <= SByte.MaxValue)
+ return il;
+ } else if (target_type == TypeManager.byte_type){
+ if (Byte.MinValue >= 0 && value <= Byte.MaxValue)
+ return il;
+ } else if (target_type == TypeManager.short_type){
+ if (value >= Int16.MinValue && value <= Int16.MaxValue)
+ return il;
+ } else if (target_type == TypeManager.ushort_type){
+ if (value >= UInt16.MinValue && value <= UInt16.MaxValue)
+ return il;
+ } else if (target_type == TypeManager.uint32_type){
+ //
+ // we can optimize this case: a positive int32
+ // always fits on a uint32
+ //
+ if (value >= 0)
+ return il;
+ } else if (target_type == TypeManager.uint64_type){
+ //
+ // we can optimize this case: a positive int32
+ // always fits on a uint64. But we need an opcode
+ // to do it.
+ //
+ if (value >= 0)
+ return new OpcodeCast (il, target_type, OpCodes.Conv_I8);
+ }
+
+ return null;
}
- public override Expression Resolve (TypeContainer tc)
+ // <summary>
+ // Attemptes to implicityly convert `target' into `type', using
+ // ConvertImplicit. If there is no implicit conversion, then
+ // an error is signaled
+ // </summary>
+ static public Expression ConvertImplicitRequired (TypeContainer tc, Expression target,
+ Type type, Location l)
{
- // This should never be invoked, we are born in fully
- // initialized state.
+ Expression e;
+
+ e = ConvertImplicit (tc, target, type, l);
+ if (e != null)
+ return e;
+
+ string msg = "Can not convert implicitly from `"+
+ TypeManager.CSharpName (target.Type) + "' to `" +
+ TypeManager.CSharpName (type) + "'";
- return this;
+ Error (tc, 29, l, msg);
+
+ return null;
}
- public override void Emit (EmitContext ec)
+ // <summary>
+ // Performs the explicit numeric conversions
+ // </summary>
+ static Expression ConvertNumericExplicit (TypeContainer tc, Expression expr,
+ Type target_type)
+ {
+ Type expr_type = expr.Type;
+
+ if (expr_type == TypeManager.sbyte_type){
+ //
+ // From sbyte to byte, ushort, uint, ulong, char
+ //
+ if (target_type == TypeManager.byte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U1);
+ if (target_type == TypeManager.ushort_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
+ if (target_type == TypeManager.uint32_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U4);
+ if (target_type == TypeManager.uint64_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I8);
+ if (target_type == TypeManager.char_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
+ } else if (expr_type == TypeManager.byte_type){
+ //
+ // From byte to sbyte and char
+ //
+ if (target_type == TypeManager.sbyte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I1);
+ if (target_type == TypeManager.char_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
+ } else if (expr_type == TypeManager.short_type){
+ //
+ // From short to sbyte, byte, ushort, uint, ulong, char
+ //
+ if (target_type == TypeManager.sbyte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I1);
+ if (target_type == TypeManager.byte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U1);
+ if (target_type == TypeManager.ushort_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
+ if (target_type == TypeManager.uint32_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U4);
+ if (target_type == TypeManager.uint64_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I8);
+ if (target_type == TypeManager.char_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
+ } else if (expr_type == TypeManager.ushort_type){
+ //
+ // From ushort to sbyte, byte, short, char
+ //
+ if (target_type == TypeManager.sbyte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I1);
+ if (target_type == TypeManager.byte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U1);
+ if (target_type == TypeManager.short_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I2);
+ if (target_type == TypeManager.char_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
+ } else if (expr_type == TypeManager.int32_type){
+ //
+ // From int to sbyte, byte, short, ushort, uint, ulong, char
+ //
+ if (target_type == TypeManager.sbyte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I1);
+ if (target_type == TypeManager.byte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U1);
+ if (target_type == TypeManager.short_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I2);
+ if (target_type == TypeManager.ushort_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
+ if (target_type == TypeManager.uint32_type)
+ return new EmptyCast (expr, target_type);
+ if (target_type == TypeManager.uint64_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I8);
+ if (target_type == TypeManager.char_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
+ } else if (expr_type == TypeManager.uint32_type){
+ //
+ // From uint to sbyte, byte, short, ushort, int, char
+ //
+ if (target_type == TypeManager.sbyte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I1);
+ if (target_type == TypeManager.byte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U1);
+ if (target_type == TypeManager.short_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I2);
+ if (target_type == TypeManager.ushort_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
+ if (target_type == TypeManager.int32_type)
+ return new EmptyCast (expr, target_type);
+ if (target_type == TypeManager.char_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
+ } else if (expr_type == TypeManager.int64_type){
+ //
+ // From long to sbyte, byte, short, ushort, int, uint, ulong, char
+ //
+ if (target_type == TypeManager.sbyte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I1);
+ if (target_type == TypeManager.byte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U1);
+ if (target_type == TypeManager.short_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I2);
+ if (target_type == TypeManager.ushort_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
+ if (target_type == TypeManager.int32_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I4);
+ if (target_type == TypeManager.uint32_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U4);
+ if (target_type == TypeManager.uint64_type)
+ return new EmptyCast (expr, target_type);
+ if (target_type == TypeManager.char_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
+ } else if (expr_type == TypeManager.uint64_type){
+ //
+ // From ulong to sbyte, byte, short, ushort, int, uint, long, char
+ //
+ if (target_type == TypeManager.sbyte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I1);
+ if (target_type == TypeManager.byte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U1);
+ if (target_type == TypeManager.short_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I2);
+ if (target_type == TypeManager.ushort_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
+ if (target_type == TypeManager.int32_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I4);
+ if (target_type == TypeManager.uint32_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U4);
+ if (target_type == TypeManager.int64_type)
+ return new EmptyCast (expr, target_type);
+ if (target_type == TypeManager.char_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
+ } else if (expr_type == TypeManager.char_type){
+ //
+ // From char to sbyte, byte, short
+ //
+ if (target_type == TypeManager.sbyte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I1);
+ if (target_type == TypeManager.byte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U1);
+ if (target_type == TypeManager.short_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I2);
+ } else if (expr_type == TypeManager.float_type){
+ //
+ // From float to sbyte, byte, short,
+ // ushort, int, uint, long, ulong, char
+ // or decimal
+ //
+ if (target_type == TypeManager.sbyte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I1);
+ if (target_type == TypeManager.byte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U1);
+ if (target_type == TypeManager.short_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I2);
+ if (target_type == TypeManager.ushort_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
+ if (target_type == TypeManager.int32_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I4);
+ if (target_type == TypeManager.uint32_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U4);
+ if (target_type == TypeManager.int64_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I8);
+ if (target_type == TypeManager.uint64_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U8);
+ if (target_type == TypeManager.char_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
+ if (target_type == TypeManager.decimal_type)
+ return InternalTypeConstructor (tc, expr, target_type);
+ } else if (expr_type == TypeManager.double_type){
+ //
+ // From double to byte, byte, short,
+ // ushort, int, uint, long, ulong,
+ // char, float or decimal
+ //
+ if (target_type == TypeManager.sbyte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I1);
+ if (target_type == TypeManager.byte_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U1);
+ if (target_type == TypeManager.short_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I2);
+ if (target_type == TypeManager.ushort_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
+ if (target_type == TypeManager.int32_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I4);
+ if (target_type == TypeManager.uint32_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U4);
+ if (target_type == TypeManager.int64_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_I8);
+ if (target_type == TypeManager.uint64_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U8);
+ if (target_type == TypeManager.char_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
+ if (target_type == TypeManager.float_type)
+ return new OpcodeCast (expr, target_type, OpCodes.Conv_R4);
+ if (target_type == TypeManager.decimal_type)
+ return InternalTypeConstructor (tc, expr, target_type);
+ }
+
+ // decimal is taken care of by the op_Explicit methods.
+
+ return null;
+ }
+
+ // <summary>
+ // Implements Explicit Reference conversions
+ // </summary>
+ static Expression ConvertReferenceExplicit (TypeContainer tc, Expression expr,
+ Type target_type)
+ {
+ Type expr_type = expr.Type;
+ bool target_is_value_type = target_type.IsValueType;
+
+ //
+ // From object to any reference type
+ //
+ if (expr_type == TypeManager.object_type && !target_is_value_type)
+ return new ClassCast (expr, expr_type);
+
+ return null;
+ }
+
+ // <summary>
+ // Performs an explicit conversion of the expression `expr' whose
+ // type is expr.Type to `target_type'.
+ // </summary>
+ static public Expression ConvertExplicit (TypeContainer tc, Expression expr,
+ Type target_type)
+ {
+ Expression ne = ConvertImplicit (tc, expr, target_type, Location.Null);
+
+ if (ne != null)
+ return ne;
+
+ ne = ConvertNumericExplicit (tc, expr, target_type);
+ if (ne != null)
+ return ne;
+
+ ne = ConvertReferenceExplicit (tc, expr, target_type);
+ if (ne != null)
+ return ne;
+
+ return null;
+ }
+
+ static string ExprClassName (ExprClass c)
+ {
+ switch (c){
+ case ExprClass.Invalid:
+ return "Invalid";
+ case ExprClass.Value:
+ return "value";
+ case ExprClass.Variable:
+ return "variable";
+ case ExprClass.Namespace:
+ return "namespace";
+ case ExprClass.Type:
+ return "type";
+ case ExprClass.MethodGroup:
+ return "method group";
+ case ExprClass.PropertyAccess:
+ return "property access";
+ case ExprClass.EventAccess:
+ return "event access";
+ case ExprClass.IndexerAccess:
+ return "indexer access";
+ case ExprClass.Nothing:
+ return "null";
+ }
+ throw new Exception ("Should not happen");
+ }
+
+ // <summary>
+ // Reports that we were expecting `expr' to be of class `expected'
+ // </summary>
+ protected void report118 (TypeContainer tc, Location l, Expression expr, string expected)
+ {
+ string kind = "Unknown";
+
+ if (expr != null)
+ kind = ExprClassName (expr.ExprClass);
+
+ Error (tc, 118, l, "Expression denotes a '" + kind +
+ "' where an " + expected + " was expected");
+ }
+ }
+
+ // <summary>
+ // This is just a base class for expressions that can
+ // appear on statements (invocations, object creation,
+ // assignments, post/pre increment and decrement). The idea
+ // being that they would support an extra Emition interface that
+ // does not leave a result on the stack.
+ // </summary>
+
+ public abstract class ExpressionStatement : Expression {
+
+ // <summary>
+ // Requests the expression to be emitted in a `statement'
+ // context. This means that no new value is left on the
+ // stack after invoking this method (constrasted with
+ // Emit that will always leave a value on the stack).
+ // </summary>
+ public abstract void EmitStatement (EmitContext ec);
+ }
+
+ // <summary>
+ // This kind of cast is used to encapsulate the child
+ // whose type is child.Type into an expression that is
+ // reported to return "return_type". This is used to encapsulate
+ // expressions which have compatible types, but need to be dealt
+ // at higher levels with.
+ //
+ // For example, a "byte" expression could be encapsulated in one
+ // of these as an "unsigned int". The type for the expression
+ // would be "unsigned int".
+ //
+ // </summary>
+
+ public class EmptyCast : Expression {
+ protected Expression child;
+
+ public EmptyCast (Expression child, Type return_type)
+ {
+ ExprClass = child.ExprClass;
+ type = return_type;
+ this.child = child;
+ }
+
+ public override Expression DoResolve (TypeContainer tc)
+ {
+ // This should never be invoked, we are born in fully
+ // initialized state.
+
+ return this;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ child.Emit (ec);
+ }
+ }
+
+ // <summary>
+ // This kind of cast is used to encapsulate Value Types in objects.
+ //
+ // The effect of it is to box the value type emitted by the previous
+ // operation.
+ // </summary>
+ public class BoxedCast : EmptyCast {
+
+ public BoxedCast (Expression expr)
+ : base (expr, TypeManager.object_type)
+ {
+ }
+
+ public override Expression DoResolve (TypeContainer tc)
+ {
+ // This should never be invoked, we are born in fully
+ // initialized state.
+
+ return this;
+ }
+
+ public override void Emit (EmitContext ec)
{
base.Emit (ec);
ec.ig.Emit (OpCodes.Box, child.Type);
}
}
+
+ // <summary>
+ // This kind of cast is used to encapsulate a child expression
+ // that can be trivially converted to a target type using one or
+ // two opcodes. The opcodes are passed as arguments.
+ // </summary>
+ public class OpcodeCast : EmptyCast {
+ OpCode op, op2;
+ bool second_valid;
+
+ public OpcodeCast (Expression child, Type return_type, OpCode op)
+ : base (child, return_type)
+
+ {
+ this.op = op;
+ second_valid = false;
+ }
+
+ public OpcodeCast (Expression child, Type return_type, OpCode op, OpCode op2)
+ : base (child, return_type)
+
+ {
+ this.op = op;
+ this.op2 = op2;
+ second_valid = true;
+ }
+
+ public override Expression DoResolve (TypeContainer tc)
+ {
+ // This should never be invoked, we are born in fully
+ // initialized state.
+
+ return this;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ base.Emit (ec);
+ ec.ig.Emit (op);
+
+ if (second_valid)
+ ec.ig.Emit (op2);
+ }
+
+ }
+
+ // <summary>
+ // This kind of cast is used to encapsulate a child and cast it
+ // to the class requested
+ // </summary>
+ public class ClassCast : EmptyCast {
+ public ClassCast (Expression child, Type return_type)
+ : base (child, return_type)
+
+ {
+ }
+
+ public override Expression DoResolve (TypeContainer tc)
+ {
+ // This should never be invoked, we are born in fully
+ // initialized state.
+
+ return this;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ base.Emit (ec);
+
+ ec.ig.Emit (OpCodes.Castclass, type);
+ }
+
+ }
+ // <summary>
+ // Unary expressions.
+ // </summary>
+ //
+ // <remarks>
+ // Unary implements unary expressions. It derives from
+ // ExpressionStatement becuase the pre/post increment/decrement
+ // operators can be used in a statement context.
+ // </remarks>
+ public class Unary : ExpressionStatement {
+ public enum Operator {
+ Addition, Subtraction, Negate, BitComplement,
+ Indirection, AddressOf, PreIncrement,
+ PreDecrement, PostIncrement, PostDecrement
+ }
+
+ Operator oper;
+ Expression expr;
+ ArrayList Arguments;
+ MethodBase method;
+ Location location;
+
+ public Unary (Operator op, Expression expr, Location loc)
+ {
+ this.oper = op;
+ this.expr = expr;
+ this.location = loc;
+ }
+
+ public Expression Expr {
+ get {
+ return expr;
+ }
+
+ set {
+ expr = value;
+ }
+ }
+
+ public Operator Oper {
+ get {
+ return oper;
+ }
+
+ set {
+ oper = value;
+ }
+ }
+
+ // <summary>
+ // Returns a stringified representation of the Operator
+ // </summary>
+ string OperName ()
+ {
+ switch (oper){
+ case Operator.Addition:
+ return "+";
+ case Operator.Subtraction:
+ return "-";
+ case Operator.Negate:
+ return "!";
+ case Operator.BitComplement:
+ return "~";
+ case Operator.AddressOf:
+ return "&";
+ case Operator.Indirection:
+ return "*";
+ case Operator.PreIncrement : case Operator.PostIncrement :
+ return "++";
+ case Operator.PreDecrement : case Operator.PostDecrement :
+ return "--";
+ }
+
+ return oper.ToString ();
+ }
+
+ Expression ForceConversion (TypeContainer tc, Expression expr, Type target_type)
+ {
+ if (expr.Type == target_type)
+ return expr;
+
+ return ConvertImplicit (tc, expr, target_type, new Location (-1));
+ }
+
+ void report23 (Report r, Type t)
+ {
+ r.Error (23, "Operator " + OperName () + " cannot be applied to operand of type `" +
+ TypeManager.CSharpName (t) + "'");
+ }
+
+ // <summary>
+ // Returns whether an object of type `t' can be incremented
+ // or decremented with add/sub (ie, basically whether we can
+ // use pre-post incr-decr operations on it, but it is not a
+ // System.Decimal, which we test elsewhere)
+ // </summary>
+ static bool IsIncrementableNumber (Type t)
+ {
+ return (t == TypeManager.sbyte_type) ||
+ (t == TypeManager.byte_type) ||
+ (t == TypeManager.short_type) ||
+ (t == TypeManager.ushort_type) ||
+ (t == TypeManager.int32_type) ||
+ (t == TypeManager.uint32_type) ||
+ (t == TypeManager.int64_type) ||
+ (t == TypeManager.uint64_type) ||
+ (t == TypeManager.char_type) ||
+ (t.IsSubclassOf (TypeManager.enum_type)) ||
+ (t == TypeManager.float_type) ||
+ (t == TypeManager.double_type);
+ }
+
+ Expression ResolveOperator (TypeContainer tc)
+ {
+ Type expr_type = expr.Type;
+
+ //
+ // Step 1: Perform Operator Overload location
+ //
+ Expression mg;
+ string op_name;
+
+ if (oper == Operator.PostIncrement || oper == Operator.PreIncrement)
+ op_name = "op_Increment";
+ else if (oper == Operator.PostDecrement || oper == Operator.PreDecrement)
+ op_name = "op_Decrement";
+ else
+ op_name = "op_" + oper;
+
+ mg = MemberLookup (tc, expr_type, op_name, false);
+
+ if (mg == null && expr_type != TypeManager.object_type)
+ mg = MemberLookup (tc, expr_type.BaseType, op_name, false);
+
+ if (mg != null) {
+ Arguments = new ArrayList ();
+ Arguments.Add (new Argument (expr, Argument.AType.Expression));
+
+ method = Invocation.OverloadResolve (tc, (MethodGroupExpr) mg,
+ Arguments, location);
+ if (method != null) {
+ MethodInfo mi = (MethodInfo) method;
+
+ type = mi.ReturnType;
+ return this;
+ }
+ }
+
+ //
+ // Step 2: Default operations on CLI native types.
+ //
+
+ // Only perform numeric promotions on:
+ // +, -, ++, --
+
+ if (expr_type == null)
+ return null;
+
+ if (oper == Operator.Negate){
+ if (expr_type != TypeManager.bool_type) {
+ report23 (tc.RootContext.Report, expr.Type);
+ return null;
+ }
+
+ type = TypeManager.bool_type;
+ return this;
+ }
+
+ if (oper == Operator.BitComplement) {
+ 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)))){
+ report23 (tc.RootContext.Report, expr.Type);
+ return null;
+ }
+ type = expr_type;
+ return this;
+ }
+
+ if (oper == Operator.Addition) {
+ //
+ // A plus in front of something is just a no-op, so return the child.
+ //
+ return expr;
+ }
+
+ //
+ // Deals with -literals
+ // int operator- (int x)
+ // long operator- (long x)
+ // float operator- (float f)
+ // double operator- (double d)
+ // decimal operator- (decimal d)
+ //
+ if (oper == Operator.Subtraction){
+ //
+ // Fold a "- Constant" into a negative constant
+ //
+
+ Expression e = null;
+
+ //
+ // Is this a constant?
+ //
+ if (expr is IntLiteral)
+ e = new IntLiteral (-((IntLiteral) 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 (e != null){
+ e = e.Resolve (tc);
+ return e;
+ }
+
+ //
+ // Not a constant we can optimize, perform numeric
+ // promotions to int, long, double.
+ //
+ //
+ // The following is inneficient, because we call
+ // ConvertImplicit too many times.
+ //
+ // It is also not clear if we should convert to Float
+ // or Double initially.
+ //
+ Location l = new Location (-1);
+
+ if (expr_type == TypeManager.uint32_type){
+ //
+ // FIXME: handle exception to this rule that
+ // permits the int value -2147483648 (-2^31) to
+ // bt written as a decimal interger literal
+ //
+ type = TypeManager.int64_type;
+ expr = ConvertImplicit (tc, expr, type, l);
+ return this;
+ }
+
+ if (expr_type == TypeManager.uint64_type){
+ //
+ // FIXME: Handle exception of `long value'
+ // -92233720368547758087 (-2^63) to be written as
+ // decimal integer literal.
+ //
+ report23 (tc.RootContext.Report, expr_type);
+ return null;
+ }
- // <summary>
- // This kind of cast is used to encapsulate a child expression
- // that can be trivially converted to a target type using one or
- // two opcodes. The opcodes are passed as arguments.
- // </summary>
- public class OpcodeCast : EmptyCast {
- OpCode op, op2;
- bool second_valid;
-
- public OpcodeCast (Expression child, Type return_type, OpCode op)
- : base (child, return_type)
-
- {
- this.op = op;
- second_valid = false;
- }
+ e = ConvertImplicit (tc, expr, TypeManager.int32_type, l);
+ if (e != null){
+ expr = e;
+ type = e.Type;
+ return this;
+ }
- public OpcodeCast (Expression child, Type return_type, OpCode op, OpCode op2)
- : base (child, return_type)
+ e = ConvertImplicit (tc, expr, TypeManager.int64_type, l);
+ if (e != null){
+ expr = e;
+ type = e.Type;
+ return this;
+ }
+
+ e = ConvertImplicit (tc, expr, TypeManager.double_type, l);
+ if (e != null){
+ expr = e;
+ type = e.Type;
+ return this;
+ }
+
+ report23 (tc.RootContext.Report, expr_type);
+ return null;
+ }
+
+ //
+ // The operand of the prefix/postfix increment decrement operators
+ // should be an expression that is classified as a variable,
+ // a property access or an indexer access
+ //
+ if (oper == Operator.PreDecrement || oper == Operator.PreIncrement ||
+ oper == Operator.PostDecrement || oper == Operator.PostIncrement){
+ if (expr.ExprClass == ExprClass.Variable){
+ if (IsIncrementableNumber (expr_type) ||
+ expr_type == TypeManager.decimal_type){
+ type = expr_type;
+ return this;
+ }
+ } else if (expr.ExprClass == ExprClass.IndexerAccess){
+ //
+ // FIXME: Verify that we have both get and set methods
+ //
+ throw new Exception ("Implement me");
+ } else if (expr.ExprClass == ExprClass.PropertyAccess){
+ //
+ // FIXME: Verify that we have both get and set methods
+ //
+ throw new Exception ("Implement me");
+ } else {
+ report118 (tc, location, expr,
+ "variable, indexer or property access");
+ }
+ }
+
+ if (oper == Operator.AddressOf){
+ if (expr.ExprClass != ExprClass.Variable){
+ Error (tc, 211, "Cannot take the address of non-variables");
+ return null;
+ }
+ type = Type.GetType (expr.Type.ToString () + "*");
+ }
- {
- this.op = op;
- this.op2 = op2;
- second_valid = true;
+ Error (tc, 187, "No such operator '" + OperName () + "' defined for type '" +
+ TypeManager.CSharpName (expr_type) + "'");
+ return null;
+
}
- public override Expression Resolve (TypeContainer tc)
+ public override Expression DoResolve (TypeContainer tc)
{
- // This should never be invoked, we are born in fully
- // initialized state.
+ expr = expr.Resolve (tc);
- return this;
+ if (expr == null)
+ return null;
+
+ eclass = ExprClass.Value;
+ return ResolveOperator (tc);
}
public override void Emit (EmitContext ec)
{
- base.Emit (ec);
- ec.ig.Emit (op);
+ ILGenerator ig = ec.ig;
+ Type expr_type = expr.Type;
- if (second_valid)
- ec.ig.Emit (op2);
- }
-
- }
-
- public class Unary : Expression {
- public enum Operator {
- Plus, Minus, Negate, BitComplement,
- Indirection, AddressOf, PreIncrement,
- PreDecrement, PostIncrement, PostDecrement
- }
+ if (method != null) {
- Operator oper;
- Expression expr;
-
- public Unary (Operator op, Expression expr)
- {
- this.oper = op;
- this.expr = expr;
- }
+ // Note that operators are static anyway
+
+ if (Arguments != null)
+ Invocation.EmitArguments (ec, method, Arguments);
- public Expression Expr {
- get {
- return expr;
- }
+ //
+ // Post increment/decrement operations need a copy at this
+ // point.
+ //
+ if (oper == Operator.PostDecrement || oper == Operator.PostIncrement)
+ ig.Emit (OpCodes.Dup);
+
- set {
- expr = value;
- }
- }
+ ig.Emit (OpCodes.Call, (MethodInfo) method);
- public Operator Oper {
- get {
- return oper;
+ //
+ // Pre Increment and Decrement operators
+ //
+ if (oper == Operator.PreIncrement || oper == Operator.PreDecrement){
+ ig.Emit (OpCodes.Dup);
+ }
+
+ //
+ // Increment and Decrement should store the result
+ //
+ if (oper == Operator.PreDecrement || oper == Operator.PreIncrement ||
+ oper == Operator.PostDecrement || oper == Operator.PostIncrement){
+ ((LValue) expr).Store (ec);
+ }
+ return;
}
-
- set {
- oper = value;
+
+ switch (oper) {
+ case Operator.Addition:
+ throw new Exception ("This should be caught by Resolve");
+
+ case Operator.Subtraction:
+ expr.Emit (ec);
+ ig.Emit (OpCodes.Neg);
+ break;
+
+ case Operator.Negate:
+ expr.Emit (ec);
+ ig.Emit (OpCodes.Ldc_I4_0);
+ ig.Emit (OpCodes.Ceq);
+ break;
+
+ case Operator.BitComplement:
+ expr.Emit (ec);
+ ig.Emit (OpCodes.Not);
+ break;
+
+ case Operator.AddressOf:
+ ((LValue)expr).AddressOf (ec);
+ break;
+
+ case Operator.Indirection:
+ throw new Exception ("Not implemented yet");
+
+ case Operator.PreIncrement:
+ case Operator.PreDecrement:
+ if (expr.ExprClass == ExprClass.Variable){
+ //
+ // Resolve already verified that it is an "incrementable"
+ //
+ expr.Emit (ec);
+ ig.Emit (OpCodes.Ldc_I4_1);
+
+ if (oper == Operator.PreDecrement)
+ ig.Emit (OpCodes.Sub);
+ else
+ ig.Emit (OpCodes.Add);
+ ig.Emit (OpCodes.Dup);
+ ((LValue) expr).Store (ec);
+ } else {
+ throw new Exception ("Handle Indexers and Properties here");
+ }
+ break;
+
+ case Operator.PostIncrement:
+ case Operator.PostDecrement:
+ if (expr.ExprClass == ExprClass.Variable){
+ //
+ // Resolve already verified that it is an "incrementable"
+ //
+ expr.Emit (ec);
+ ig.Emit (OpCodes.Dup);
+ ig.Emit (OpCodes.Ldc_I4_1);
+
+ if (oper == Operator.PostDecrement)
+ ig.Emit (OpCodes.Sub);
+ else
+ ig.Emit (OpCodes.Add);
+ ((LValue) expr).Store (ec);
+ } else {
+ throw new Exception ("Handle Indexers and Properties here");
+ }
+ break;
+
+ default:
+ throw new Exception ("This should not happen: Operator = "
+ + oper.ToString ());
}
}
+
- public override Expression Resolve (TypeContainer tc)
- {
- // FIXME: Implement;
- return this;
- }
-
- public override void Emit (EmitContext ec)
+ public override void EmitStatement (EmitContext ec)
{
+ //
+ // FIXME: we should rewrite this code to generate
+ // better code for ++ and -- as we know we wont need
+ // the values on the stack
+ //
+ Emit (ec);
+ ec.ig.Emit (OpCodes.Pop);
}
}
-
+
public class Probe : Expression {
- string probe_type;
+ public readonly string ProbeType;
+ public readonly Operator Oper;
Expression expr;
- Operator oper;
-
+ Type probe_type;
+
public enum Operator {
Is, As
}
public Probe (Operator oper, Expression expr, string probe_type)
{
- this.oper = oper;
- this.probe_type = probe_type;
+ Oper = oper;
+ ProbeType = probe_type;
this.expr = expr;
}
- public Operator Oper {
- get {
- return oper;
- }
- }
-
public Expression Expr {
get {
return expr;
}
}
+
+ public override Expression DoResolve (TypeContainer tc)
+ {
+ probe_type = tc.LookupType (ProbeType, false);
- public string ProbeType {
- get {
- return probe_type;
- }
- }
+ if (probe_type == null)
+ return null;
+
+ expr = expr.Resolve (tc);
+
+ type = TypeManager.bool_type;
+ eclass = ExprClass.Value;
- public override Expression Resolve (TypeContainer tc)
- {
- // FIXME: Implement;
return this;
}
public override void Emit (EmitContext ec)
{
+ ILGenerator ig = ec.ig;
+
+ 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);
+ }
}
}
-
+
+ // <summary>
+ // This represents a typecast in the source language.
+ //
+ // FIXME: Cast expressions have an unusual set of parsing
+ // rules, we need to figure those out.
+ // </summary>
public class Cast : Expression {
string target_type;
Expression expr;
-
+
public Cast (string cast_type, Expression expr)
{
- this.target_type = target_type;
+ this.target_type = cast_type;
this.expr = expr;
}
}
}
- public override Expression Resolve (TypeContainer tc)
+ public override Expression DoResolve (TypeContainer tc)
{
- // FIXME: Implement;
- return this;
+ expr = expr.Resolve (tc);
+ if (expr == null)
+ return null;
+
+ type = tc.LookupType (target_type, false);
+ eclass = ExprClass.Value;
+
+ if (type == null)
+ return null;
+
+ expr = ConvertExplicit (tc, expr, type);
+
+ return expr;
}
public override void Emit (EmitContext ec)
{
+ //
+ // This one will never happen
+ //
+ throw new Exception ("Should not happen");
}
}
public class Binary : Expression {
public enum Operator {
- Multiply, Divide, Modulo,
- Add, Subtract,
- ShiftLeft, ShiftRight,
- LessThan, GreaterThan, LessOrEqual, GreaterOrEqual,
- Equal, NotEqual,
+ Multiply, Division, Modulus,
+ Addition, Subtraction,
+ LeftShift, RightShift,
+ LessThan, GreaterThan, LessThanOrEqual, GreaterThanOrEqual,
+ Equality, Inequality,
BitwiseAnd,
ExclusiveOr,
BitwiseOr,
Expression left, right;
MethodBase method;
ArrayList Arguments;
+ Location location;
- public Binary (Operator oper, Expression left, Expression right)
+ public Binary (Operator oper, Expression left, Expression right, Location loc)
{
this.oper = oper;
this.left = left;
this.right = right;
+ this.location = loc;
}
public Operator Oper {
// <summary>
- // Retruns a stringified representation of the Operator
+ // Returns a stringified representation of the Operator
// </summary>
string OperName ()
{
switch (oper){
case Operator.Multiply:
return "*";
- case Operator.Divide:
+ case Operator.Division:
return "/";
- case Operator.Modulo:
+ case Operator.Modulus:
return "%";
- case Operator.Add:
+ case Operator.Addition:
return "+";
- case Operator.Subtract:
+ case Operator.Subtraction:
return "-";
- case Operator.ShiftLeft:
+ case Operator.LeftShift:
return "<<";
- case Operator.ShiftRight:
+ case Operator.RightShift:
return ">>";
case Operator.LessThan:
return "<";
case Operator.GreaterThan:
return ">";
- case Operator.LessOrEqual:
+ case Operator.LessThanOrEqual:
return "<=";
- case Operator.GreaterOrEqual:
+ case Operator.GreaterThanOrEqual:
return ">=";
- case Operator.Equal:
+ case Operator.Equality:
return "==";
- case Operator.NotEqual:
+ case Operator.Inequality:
return "!=";
case Operator.BitwiseAnd:
return "&";
return oper.ToString ();
}
- Expression ForceConversion (Expression expr, Type target_type)
+ Expression ForceConversion (TypeContainer tc, Expression expr, Type target_type)
{
if (expr.Type == target_type)
return expr;
- return ConvertImplicit (expr, target_type);
+ return ConvertImplicit (tc, expr, target_type, new Location (-1));
}
//
// conveted to type double.
//
if (r != TypeManager.double_type)
- right = ConvertImplicit (right, TypeManager.double_type);
+ right = ConvertImplicit (tc, right, TypeManager.double_type, location);
if (l != TypeManager.double_type)
- left = ConvertImplicit (left, TypeManager.double_type);
+ left = ConvertImplicit (tc, left, TypeManager.double_type, location);
type = TypeManager.double_type;
} else if (l == TypeManager.float_type || r == TypeManager.float_type){
// converd to type float.
//
if (r != TypeManager.double_type)
- right = ConvertImplicit (right, TypeManager.float_type);
+ right = ConvertImplicit (tc, right, TypeManager.float_type, location);
if (l != TypeManager.double_type)
- left = ConvertImplicit (left, TypeManager.float_type);
+ left = ConvertImplicit (tc, left, TypeManager.float_type, location);
type = TypeManager.float_type;
} else if (l == TypeManager.uint64_type || r == TypeManager.uint64_type){
+ Expression e;
+ Type other;
//
// If either operand is of type ulong, the other operand is
// converted to type ulong. or an error ocurrs if the other
// operand is of type sbyte, short, int or long
//
- Type other = null;
- if (l == TypeManager.uint64_type)
- other = r;
- else if (r == TypeManager.uint64_type)
- other = l;
+ if (l == TypeManager.uint64_type){
+ if (r != TypeManager.uint64_type && right is IntLiteral){
+ e = TryImplicitIntConversion (l, (IntLiteral) right);
+ if (e != null)
+ right = e;
+ }
+ other = right.Type;
+ } else {
+ if (left is IntLiteral){
+ e = TryImplicitIntConversion (r, (IntLiteral) left);
+ if (e != null)
+ left = e;
+ }
+ other = left.Type;
+ }
if ((other == TypeManager.sbyte_type) ||
(other == TypeManager.short_type) ||
(other == TypeManager.int64_type)){
string oper = OperName ();
- tc.RootContext.Report.Error (34, "Operator `" + OperName ()
- + "' is ambiguous on operands of type `"
- + TypeManager.CSharpName (l) + "' "
- + "and `" + TypeManager.CSharpName (r)
- + "'");
+ Error (tc, 34, location, "Operator `" + OperName ()
+ + "' is ambiguous on operands of type `"
+ + TypeManager.CSharpName (l) + "' "
+ + "and `" + TypeManager.CSharpName (r)
+ + "'");
}
type = TypeManager.uint64_type;
} else if (l == TypeManager.int64_type || r == TypeManager.int64_type){
// to type long.
//
if (l != TypeManager.int64_type)
- left = ConvertImplicit (left, TypeManager.int64_type);
+ left = ConvertImplicit (tc, left, TypeManager.int64_type, location);
if (r != TypeManager.int64_type)
- right = ConvertImplicit (right, TypeManager.int64_type);
+ right = ConvertImplicit (tc, right, TypeManager.int64_type, location);
type = TypeManager.int64_type;
} else if (l == TypeManager.uint32_type || r == TypeManager.uint32_type){
if ((other == TypeManager.sbyte_type) ||
(other == TypeManager.short_type) ||
(other == TypeManager.int32_type)){
- left = ForceConversion (left, TypeManager.int64_type);
- right = ForceConversion (right, TypeManager.int64_type);
+ left = ForceConversion (tc, left, TypeManager.int64_type);
+ right = ForceConversion (tc, right, TypeManager.int64_type);
type = TypeManager.int64_type;
} else {
//
// if either operand is of type uint, the other
// operand is converd to type uint
//
- left = ForceConversion (left, TypeManager.uint32_type);
- right = ForceConversion (left, TypeManager.uint32_type);
+ left = ForceConversion (tc, left, TypeManager.uint32_type);
+ right = ForceConversion (tc, right, TypeManager.uint32_type);
type = TypeManager.uint32_type;
}
+ } else if (l == TypeManager.decimal_type || r == TypeManager.decimal_type){
+ if (l != TypeManager.decimal_type)
+ left = ConvertImplicit (tc, left, TypeManager.decimal_type, location);
+ if (r != TypeManager.decimal_type)
+ right = ConvertImplicit (tc, right, TypeManager.decimal_type, location);
+
+ type = TypeManager.decimal_type;
} else {
- left = ForceConversion (left, TypeManager.int32_type);
- right = ForceConversion (right, TypeManager.int32_type);
+ left = ForceConversion (tc, left, TypeManager.int32_type);
+ right = ForceConversion (tc, right, TypeManager.int32_type);
type = TypeManager.int32_type;
}
}
void error19 (TypeContainer tc)
{
- tc.RootContext.Report.Error (
- 19,
- "Operator " + OperName () + " cannot be applied to operands of type `" +
- TypeManager.CSharpName (left.Type) + "' and `" +
- TypeManager.CSharpName (right.Type) + "'");
+ Error (tc, 19,
+ "Operator " + OperName () + " cannot be applied to operands of type `" +
+ TypeManager.CSharpName (left.Type) + "' and `" +
+ TypeManager.CSharpName (right.Type) + "'");
}
Type l = left.Type;
Type r = right.Type;
- e = ForceConversion (right, TypeManager.int32_type);
+ e = ForceConversion (tc, right, TypeManager.int32_type);
if (e == null){
error19 (tc);
return null;
}
right = e;
- if (((e = ConvertImplicit (left, TypeManager.int32_type)) != null) ||
- ((e = ConvertImplicit (left, TypeManager.uint32_type)) != null) ||
- ((e = ConvertImplicit (left, TypeManager.int64_type)) != null) ||
- ((e = ConvertImplicit (left, TypeManager.uint64_type)) != null)){
+ Location loc = location;
+
+ if (((e = ConvertImplicit (tc, left, TypeManager.int32_type, loc)) != null) ||
+ ((e = ConvertImplicit (tc, left, TypeManager.uint32_type, loc)) != null) ||
+ ((e = ConvertImplicit (tc, left, TypeManager.int64_type, loc)) != null) ||
+ ((e = ConvertImplicit (tc, left, TypeManager.uint64_type, loc)) != null)){
left = e;
+ type = e.Type;
return this;
}
//
Expression left_expr, right_expr;
- string op = "Operator" + oper;
-
- left_expr = MemberLookup (tc.RootContext, l, op, false);
+ string op = "op_" + oper;
- if (!(left_expr is MethodGroupExpr)){
- // FIXME: Find proper error
- tc.RootContext.Report.Error (118, "Did find something that is not a method");
- return null;
- }
-
- right_expr = MemberLookup (tc.RootContext, r, op, false);
-
- if (!(right_expr is MethodGroupExpr)){
- // FIXME: Find proper error
- tc.RootContext.Report.Error (118, "Did find something that is not a method");
- return null;
- }
+ left_expr = MemberLookup (tc, l, op, false);
- if (left_expr != null || right_expr != null) {
- //
- // Now we need to form the union of these two sets and
- // then call OverloadResolve on that.
- //
- MethodGroupExpr left_set = null, right_set = null;
- int length1 = 0, length2 = 0;
-
- if (left_expr != null) {
- left_set = (MethodGroupExpr) left_expr;
- length1 = left_set.Methods.Length;
- }
+ if (left_expr == null && l != TypeManager.object_type)
+ left_expr = MemberLookup (tc, l.BaseType, op, false);
+
+ right_expr = MemberLookup (tc, r, op, false);
+ if (right_expr != null && r != TypeManager.object_type)
+ right_expr = MemberLookup (tc, r.BaseType, op, false);
+
- if (right_expr != null) {
- right_set = (MethodGroupExpr) right_expr;
- length2 = right_set.Methods.Length;
- }
+ MethodGroupExpr union = Invocation.MakeUnionSet (left_expr, right_expr);
- MemberInfo [] mi = new MemberInfo [length1 + length2];
- if (left_set != null)
- left_set.Methods.CopyTo (mi, 0);
- if (right_set != null)
- right_set.Methods.CopyTo (mi, length1);
-
- MethodGroupExpr union = new MethodGroupExpr (mi);
-
+ if (union != null) {
Arguments = new ArrayList ();
Arguments.Add (new Argument (left, Argument.AType.Expression));
Arguments.Add (new Argument (right, Argument.AType.Expression));
-
- method = Invocation.OverloadResolve (union, Arguments);
- if (method != null)
+
+ method = Invocation.OverloadResolve (tc, union, Arguments, location);
+ if (method != null) {
+ MethodInfo mi = (MethodInfo) method;
+
+ type = mi.ReturnType;
return this;
-
- }
-
+ }
+ }
+
//
// Step 2: Default operations on CLI native types.
//
// Only perform numeric promotions on:
// +, -, *, /, %, &, |, ^, ==, !=, <, >, <=, >=
//
- if (oper == Operator.ShiftLeft || oper == Operator.ShiftRight){
+ if (oper == Operator.Addition){
+ //
+ // If any of the arguments is a string, cast to string
+ //
+ if (l == TypeManager.string_type){
+ if (r == TypeManager.string_type){
+ // string + string
+ method = TypeManager.string_concat_string_string;
+ } else {
+ // string + object
+ method = TypeManager.string_concat_object_object;
+ right = ConvertImplicit (tc, right,
+ TypeManager.object_type, location);
+ }
+ type = TypeManager.string_type;
+
+ Arguments = new ArrayList ();
+ Arguments.Add (new Argument (left, Argument.AType.Expression));
+ Arguments.Add (new Argument (right, Argument.AType.Expression));
+
+ return this;
+
+ } else if (r == TypeManager.string_type){
+ // object + string
+ method = TypeManager.string_concat_object_object;
+ Arguments = new ArrayList ();
+ Arguments.Add (new Argument (left, Argument.AType.Expression));
+ Arguments.Add (new Argument (right, Argument.AType.Expression));
+
+ left = ConvertImplicit (tc, left, TypeManager.object_type, location);
+ type = TypeManager.string_type;
+
+ return this;
+ }
+
+ //
+ // FIXME: is Delegate operator + (D x, D y) handled?
+ //
+ }
+
+ if (oper == Operator.LeftShift || oper == Operator.RightShift)
return CheckShiftArguments (tc);
- } else if (oper == Operator.LogicalOr || oper == Operator.LogicalAnd){
+ if (oper == Operator.LogicalOr || oper == Operator.LogicalAnd){
if (l != TypeManager.bool_type || r != TypeManager.bool_type)
error19 (tc);
- } else
- DoNumericPromotions (tc, l, r);
+
+ type = TypeManager.bool_type;
+ return this;
+ }
+
+ //
+ // We are dealing with numbers
+ //
+
+ DoNumericPromotions (tc, l, r);
if (left == null || right == null)
return null;
error19 (tc);
return null;
}
+ type = l;
}
- if (oper == Operator.Equal ||
- oper == Operator.NotEqual ||
- oper == Operator.LessOrEqual ||
+ if (oper == Operator.Equality ||
+ oper == Operator.Inequality ||
+ oper == Operator.LessThanOrEqual ||
oper == Operator.LessThan ||
- oper == Operator.GreaterOrEqual ||
+ oper == Operator.GreaterThanOrEqual ||
oper == Operator.GreaterThan){
type = TypeManager.bool_type;
}
return this;
}
- public override Expression Resolve (TypeContainer tc)
+ public override Expression DoResolve (TypeContainer tc)
{
left = left.Resolve (tc);
right = right.Resolve (tc);
if (left == null || right == null)
return null;
+ if (left.Type == null)
+ throw new Exception (
+ "Resolve returned non null, but did not set the type! (" +
+ left + ")");
+ if (right.Type == null)
+ throw new Exception (
+ "Resolve returned non null, but did not set the type! (" +
+ right + ")");
+
+ eclass = ExprClass.Value;
+
return ResolveOperator (tc);
}
public bool IsBranchable ()
{
- if (oper == Operator.Equal ||
- oper == Operator.NotEqual ||
+ if (oper == Operator.Equality ||
+ oper == Operator.Inequality ||
oper == Operator.LessThan ||
oper == Operator.GreaterThan ||
- oper == Operator.LessOrEqual ||
- oper == Operator.GreaterOrEqual){
+ oper == Operator.LessThanOrEqual ||
+ oper == Operator.GreaterThanOrEqual){
return true;
} else
return false;
right.Emit (ec);
switch (oper){
- case Operator.Equal:
+ case Operator.Equality:
if (close_target)
opcode = OpCodes.Beq_S;
else
opcode = OpCodes.Beq;
break;
- case Operator.NotEqual:
+ case Operator.Inequality:
if (close_target)
opcode = OpCodes.Bne_Un_S;
else
opcode = OpCodes.Bgt;
break;
- case Operator.LessOrEqual:
+ case Operator.LessThanOrEqual:
if (close_target)
opcode = OpCodes.Ble_S;
else
opcode = OpCodes.Ble;
break;
- case Operator.GreaterOrEqual:
+ case Operator.GreaterThanOrEqual:
if (close_target)
opcode = OpCodes.Bge_S;
else
if (method != null) {
- bool is_static = method.IsStatic;
-
- // FIXME : I am just not able to get this right !!
- // There's something wrong with this part which causes
- // an InvalidProgramException if this code is emitted
-
- //if (Arguments != null)
- // Invocation.EmitArguments (ec, Arguments);
+ // Note that operators are static anyway
- //if (is_static){
- // if (method is MethodInfo)
- // ig.Emit (OpCodes.Call, (MethodInfo) method);
- // else
- // ig.Emit (OpCodes.Call, (ConstructorInfo) method);
- //} else {
- // if (method is MethodInfo)
- // ig.Emit (OpCodes.Callvirt, (MethodInfo) method);
- // else
- // ig.Emit (OpCodes.Callvirt, (ConstructorInfo) method);
- //}
+ if (Arguments != null)
+ Invocation.EmitArguments (ec, method, Arguments);
- //return;
+ if (method is MethodInfo)
+ ig.Emit (OpCodes.Call, (MethodInfo) method);
+ else
+ ig.Emit (OpCodes.Call, (ConstructorInfo) method);
+
+ return;
}
left.Emit (ec);
break;
- case Operator.Divide:
+ case Operator.Division:
if (l == TypeManager.uint32_type || l == TypeManager.uint64_type)
opcode = OpCodes.Div_Un;
else
opcode = OpCodes.Div;
break;
- case Operator.Modulo:
+ case Operator.Modulus:
if (l == TypeManager.uint32_type || l == TypeManager.uint64_type)
opcode = OpCodes.Rem_Un;
else
opcode = OpCodes.Rem;
break;
- case Operator.Add:
+ case Operator.Addition:
if (ec.CheckState){
if (l == TypeManager.int32_type || l == TypeManager.int64_type)
opcode = OpCodes.Add_Ovf;
opcode = OpCodes.Add;
break;
- case Operator.Subtract:
+ case Operator.Subtraction:
if (ec.CheckState){
if (l == TypeManager.int32_type || l == TypeManager.int64_type)
opcode = OpCodes.Sub_Ovf;
opcode = OpCodes.Sub;
break;
- case Operator.ShiftRight:
+ case Operator.RightShift:
opcode = OpCodes.Shr;
break;
- case Operator.ShiftLeft:
+ case Operator.LeftShift:
opcode = OpCodes.Shl;
break;
- case Operator.Equal:
+ case Operator.Equality:
opcode = OpCodes.Ceq;
break;
- case Operator.NotEqual:
+ case Operator.Inequality:
ec.ig.Emit (OpCodes.Ceq);
ec.ig.Emit (OpCodes.Ldc_I4_0);
opcode = OpCodes.Cgt;
break;
- case Operator.LessOrEqual:
+ case Operator.LessThanOrEqual:
ec.ig.Emit (OpCodes.Cgt);
ec.ig.Emit (OpCodes.Ldc_I4_0);
opcode = OpCodes.Ceq;
break;
- case Operator.GreaterOrEqual:
+ case Operator.GreaterThanOrEqual:
ec.ig.Emit (OpCodes.Clt);
ec.ig.Emit (OpCodes.Ldc_I4_1);
+ oper.ToString ());
}
- ec.ig.Emit (opcode);
+ ig.Emit (opcode);
}
}
public class Conditional : Expression {
Expression expr, trueExpr, falseExpr;
+ Location l;
- public Conditional (Expression expr, Expression trueExpr, Expression falseExpr)
+ public Conditional (Expression expr, Expression trueExpr, Expression falseExpr, Location l)
{
this.expr = expr;
this.trueExpr = trueExpr;
this.falseExpr = falseExpr;
+ this.l = l;
}
public Expression Expr {
}
}
- public override Expression Resolve (TypeContainer tc)
+ public override Expression DoResolve (TypeContainer tc)
{
- // FIXME: Implement;
+ expr = expr.Resolve (tc);
+
+ if (expr.Type != TypeManager.bool_type)
+ expr = Expression.ConvertImplicitRequired (
+ tc, expr, TypeManager.bool_type, l);
+
+ trueExpr = trueExpr.Resolve (tc);
+ falseExpr = falseExpr.Resolve (tc);
+
+ if (expr == null || trueExpr == null || falseExpr == null)
+ return null;
+
+ if (trueExpr.Type == falseExpr.Type)
+ type = trueExpr.Type;
+ else {
+ Expression conv;
+
+ //
+ // First, if an implicit conversion exists from trueExpr
+ // to falseExpr, then the result type is of type falseExpr.Type
+ //
+ conv = ConvertImplicit (tc, trueExpr, falseExpr.Type, l);
+ if (conv != null){
+ type = falseExpr.Type;
+ trueExpr = conv;
+ } else if ((conv = ConvertImplicit (tc,falseExpr,trueExpr.Type,l)) != null){
+ type = trueExpr.Type;
+ falseExpr = conv;
+ } else {
+ Error (tc, 173, l, "The type of the conditional expression can " +
+ "not be computed because there is no implicit conversion" +
+ " from `" + TypeManager.CSharpName (trueExpr.Type) + "'" +
+ " and `" + TypeManager.CSharpName (falseExpr.Type) + "'");
+ return null;
+ }
+ }
+
+ eclass = ExprClass.Value;
return this;
}
public override void Emit (EmitContext ec)
{
+ ILGenerator ig = ec.ig;
+ Label false_target = ig.DefineLabel ();
+ Label end_target = ig.DefineLabel ();
+
+ expr.Emit (ec);
+ ig.Emit (OpCodes.Brfalse, false_target);
+ trueExpr.Emit (ec);
+ ig.Emit (OpCodes.Br, end_target);
+ ig.MarkLabel (false_target);
+ falseExpr.Emit (ec);
+ ig.MarkLabel (end_target);
}
}
public class SimpleName : Expression {
- string name;
+ public readonly string Name;
+ public readonly Location Location;
- public SimpleName (string name)
+ public SimpleName (string name, Location l)
{
- this.name = name;
- }
-
- public string Name {
- get {
- return name;
- }
+ Name = name;
+ Location = l;
}
//
if (!fi.IsStatic){
r.Error (120,
"An object reference is required " +
- "for the non-static field `"+name+"'");
+ "for the non-static field `"+Name+"'");
return null;
}
} else if (e is MethodGroupExpr){
r.Error (120,
"An object reference is required " +
"for the non-static property access `"+
- name+"'");
+ Name+"'");
return null;
}
}
Expression e;
Report r = tc.RootContext.Report;
- e = MemberLookup (tc.RootContext, tc.TypeBuilder, name, true);
+ e = MemberLookup (tc, tc.TypeBuilder, Name, true);
if (e != null){
if (e is TypeExpr)
return e;
+ else if (e is FieldExpr){
+ FieldExpr fe = (FieldExpr) e;
+
+ if (!fe.FieldInfo.IsStatic)
+ fe.Instance = new This ();
+ }
+
if ((tc.ModFlags & Modifiers.STATIC) != 0)
return MemberStaticCheck (r, e);
else
// Do step 3 of the Simple Name resolution.
//
// FIXME: implement me.
-
- return this;
+
+ Error (tc, 103, Location, "The name `" + Name + "' does not exist in the class `" +
+ tc.Name + "'");
+
+ return null;
}
//
// simple_names and qualified_identifiers are placed on
// the tree equally.
//
- public override Expression Resolve (TypeContainer tc)
+ public override Expression DoResolve (TypeContainer tc)
{
- if (name.IndexOf (".") != -1)
- return ResolveMemberAccess (tc, name);
+ if (Name.IndexOf (".") != -1)
+ return ResolveMemberAccess (tc, Name);
else
return ResolveSimpleName (tc);
}
public override void Emit (EmitContext ec)
{
+ throw new Exception ("SimpleNames should be gone from the tree");
}
}
+
+ // <summary>
+ // A simple interface that should be implemeneted by LValues
+ // </summary>
+ public interface LValue {
+
+ // <summary>
+ // The Store method should store the contents of the top
+ // of the stack into the storage that is implemented by
+ // the particular implementation of LValue
+ // </summary>
+ void Store (EmitContext ec);
+
+ // <summary>
+ // The AddressOf method should generate code that loads
+ // the address of the LValue and leaves it on the stack
+ // </summary>
+ void AddressOf (EmitContext ec);
+ }
- public class LocalVariableReference : Expression {
+ public class LocalVariableReference : Expression, LValue {
public readonly string Name;
public readonly Block Block;
}
}
- public override Expression Resolve (TypeContainer tc)
+ public override Expression DoResolve (TypeContainer tc)
{
VariableInfo vi = Block.GetVariableInfo (Name);
VariableInfo vi = VariableInfo;
ILGenerator ig = ec.ig;
int idx = vi.Idx;
+
+ vi.Used = true;
switch (idx){
case 0:
break;
default:
- if (idx < 255)
- ig.Emit (OpCodes.Ldloc_S, idx);
+ if (idx <= 255)
+ ig.Emit (OpCodes.Ldloc_S, (byte) idx);
else
ig.Emit (OpCodes.Ldloc, idx);
break;
}
}
+
+ public void Store (EmitContext ec)
+ {
+ ILGenerator ig = ec.ig;
+ VariableInfo vi = VariableInfo;
+ int idx = vi.Idx;
+
+ vi.Assigned = true;
+ switch (idx){
+ case 0:
+ ig.Emit (OpCodes.Stloc_0);
+ break;
+
+ case 1:
+ ig.Emit (OpCodes.Stloc_1);
+ break;
+
+ case 2:
+ ig.Emit (OpCodes.Stloc_2);
+ break;
+
+ case 3:
+ ig.Emit (OpCodes.Stloc_3);
+ break;
+
+ default:
+ if (idx <= 255)
+ ig.Emit (OpCodes.Stloc_S, (byte) idx);
+ else
+ ig.Emit (OpCodes.Stloc, idx);
+ break;
+ }
+ }
+
+ public void AddressOf (EmitContext ec)
+ {
+ VariableInfo vi = VariableInfo;
+ int idx = vi.Idx;
+
+ vi.Used = true;
+ vi.Assigned = true;
+
+ if (idx <= 255)
+ ec.ig.Emit (OpCodes.Ldloca_S, (byte) idx);
+ else
+ ec.ig.Emit (OpCodes.Ldloca, idx);
+ }
}
- public class ParameterReference : Expression {
+ public class ParameterReference : Expression, LValue {
public readonly Parameters Pars;
public readonly String Name;
public readonly int Idx;
Pars = pars;
Idx = idx;
Name = name;
+ eclass = ExprClass.Variable;
}
- public override Expression Resolve (TypeContainer tc)
+ public override Expression DoResolve (TypeContainer tc)
{
Type [] types = Pars.GetParameterInfo (tc);
type = types [Idx];
-
+
return this;
}
public override void Emit (EmitContext ec)
{
- if (Idx < 255)
- ec.ig.Emit (OpCodes.Ldarg_S, Idx);
+ if (Idx <= 255)
+ ec.ig.Emit (OpCodes.Ldarg_S, (byte) Idx);
else
ec.ig.Emit (OpCodes.Ldarg, Idx);
}
+
+ public void Store (EmitContext ec)
+ {
+ if (Idx <= 255)
+ ec.ig.Emit (OpCodes.Starg_S, (byte) Idx);
+ else
+ ec.ig.Emit (OpCodes.Starg, Idx);
+
+ }
+
+ public void AddressOf (EmitContext ec)
+ {
+ if (Idx <= 255)
+ ec.ig.Emit (OpCodes.Ldarga_S, (byte) Idx);
+ else
+ ec.ig.Emit (OpCodes.Ldarga, Idx);
+ }
}
// <summary>
get {
return expr;
}
- }
-
- public bool Resolve (TypeContainer tc)
- {
- expr = expr.Resolve (tc);
- return expr != null;
- }
+ set {
+ expr = value;
+ }
+ }
+
+ public bool Resolve (TypeContainer tc)
+ {
+ expr = expr.Resolve (tc);
+
+ return expr != null;
+ }
+
+ public void Emit (EmitContext ec)
+ {
+ expr.Emit (ec);
+ }
+ }
+
+ // <summary>
+ // Invocation of methods or delegates.
+ // </summary>
+ public class Invocation : ExpressionStatement {
+ public readonly ArrayList Arguments;
+ public readonly Location Location;
+
+ Expression expr;
+ MethodBase method = null;
+
+ static Hashtable method_parameter_cache;
+
+ static Invocation ()
+ {
+ method_parameter_cache = new Hashtable ();
+ }
+
+ //
+ // arguments is an ArrayList, but we do not want to typecast,
+ // as it might be null.
+ //
+ // FIXME: only allow expr to be a method invocation or a
+ // delegate invocation (7.5.5)
+ //
+ public Invocation (Expression expr, ArrayList arguments, Location l)
+ {
+ this.expr = expr;
+ Arguments = arguments;
+ Location = l;
+ }
+
+ public Expression Expr {
+ get {
+ return expr;
+ }
+ }
+
+ // <summary>
+ // Returns the Parameters (a ParameterData interface) for the
+ // Method `mb'
+ // </summary>
+ static ParameterData GetParameterData (MethodBase mb)
+ {
+ object pd = method_parameter_cache [mb];
+
+ if (pd != null)
+ return (ParameterData) pd;
+
+ if (mb is MethodBuilder || mb is ConstructorBuilder){
+ MethodCore mc = TypeContainer.LookupMethodByBuilder (mb);
+
+ InternalParameters ip = mc.ParameterInfo;
+ method_parameter_cache [mb] = ip;
+
+ return (ParameterData) ip;
+ } else {
+ ParameterInfo [] pi = mb.GetParameters ();
+ ReflectionParameters rp = new ReflectionParameters (pi);
+ method_parameter_cache [mb] = rp;
+
+ return (ParameterData) rp;
+ }
+ }
+
+ // <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 (TypeContainer tc, Type from, Type to)
+ {
+ // Locate user-defined implicit operators
+
+ Expression mg;
+
+ mg = MemberLookup (tc, to, "op_Implicit", false);
+
+ 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 (tc, from, "op_Implicit", false);
+
+ 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 (TypeContainer tc, Argument a, Type p, Type q, bool use_standard)
+ {
+
+ Type argument_type = a.Expr.Type;
+ Expression argument_expr = a.Expr;
+
+ if (argument_type == null)
+ throw new Exception ("Expression of type " + a.Expr + " does not resolve its type");
+
+ if (p == q)
+ return 0;
+
+ if (argument_type == p)
+ return 1;
+
+ if (argument_type == q)
+ return 0;
+
+ //
+ // Now probe whether an implicit constant expression conversion
+ // can be used.
+ //
+ // An implicit constant expression conversion permits the following
+ // conversions:
+ //
+ // * A constant-expression of type `int' can be converted to type
+ // sbyte, byute, short, ushort, uint, ulong provided the value of
+ // of the expression is withing the range of the destination type.
+ //
+ // * A constant-expression of type long can be converted to type
+ // ulong, provided the value of the constant expression is not negative
+ //
+ // FIXME: Note that this assumes that constant folding has
+ // taken place. We dont do constant folding yet.
+ //
+
+ if (argument_expr is IntLiteral){
+ IntLiteral ei = (IntLiteral) argument_expr;
+ int value = ei.Value;
+
+ if (p == TypeManager.sbyte_type){
+ if (value >= SByte.MinValue && value <= SByte.MaxValue)
+ return 1;
+ } else if (p == TypeManager.byte_type){
+ if (Byte.MinValue >= 0 && value <= Byte.MaxValue)
+ return 1;
+ } else if (p == TypeManager.short_type){
+ if (value >= Int16.MinValue && value <= Int16.MaxValue)
+ return 1;
+ } else if (p == TypeManager.ushort_type){
+ if (value >= UInt16.MinValue && value <= UInt16.MaxValue)
+ return 1;
+ } else if (p == TypeManager.uint32_type){
+ //
+ // we can optimize this case: a positive int32
+ // always fits on a uint32
+ //
+ if (value >= 0)
+ return 1;
+ } else if (p == TypeManager.uint64_type){
+ //
+ // we can optimize this case: a positive int32
+ // always fits on a uint64
+ //
+ if (value >= 0)
+ return 1;
+ }
+ } else if (argument_type == TypeManager.int64_type && argument_expr is LongLiteral){
+ LongLiteral ll = (LongLiteral) argument_expr;
+
+ if (p == TypeManager.uint64_type){
+ if (ll.Value > 0)
+ return 1;
+ }
+ }
+
+ if (q == null) {
+
+ Expression tmp;
+
+ if (use_standard)
+ tmp = ConvertImplicitStandard (tc, argument_expr, p, Location.Null);
+ else
+ tmp = ConvertImplicit (tc, argument_expr, p, Location.Null);
+
+ if (tmp != null)
+ return 1;
+ else
+ return 0;
+
+ }
+
+ if (ConversionExists (tc, p, q) == true &&
+ ConversionExists (tc, q, p) == false)
+ return 1;
+
+ if (p == TypeManager.sbyte_type)
+ if (q == TypeManager.byte_type || q == TypeManager.ushort_type ||
+ q == TypeManager.uint32_type || q == TypeManager.uint64_type)
+ return 1;
+
+ if (p == TypeManager.short_type)
+ if (q == TypeManager.ushort_type || q == TypeManager.uint32_type ||
+ q == TypeManager.uint64_type)
+ return 1;
+
+ if (p == TypeManager.int32_type)
+ if (q == TypeManager.uint32_type || q == TypeManager.uint64_type)
+ return 1;
+
+ if (p == TypeManager.int64_type)
+ if (q == TypeManager.uint64_type)
+ return 1;
+
+ return 0;
+ }
+
+ // <summary>
+ // Determines "Better function" and returns an integer indicating :
+ // 0 if candidate ain't better
+ // 1 if candidate is better than the current best match
+ // </summary>
+ static int BetterFunction (TypeContainer tc, ArrayList args,
+ MethodBase candidate, MethodBase best,
+ bool use_standard)
+ {
+ 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)
+ 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 (
+ tc, a, candidate_pd.ParameterType (j), null,
+ use_standard);
+
+ if (x <= 0)
+ break;
+ }
+
+ if (x > 0)
+ return 1;
+ else
+ return 0;
+
+ } else
+ return 0;
+ }
+
+ best_pd = GetParameterData (best);
- public void Emit (EmitContext ec)
- {
- expr.Emit (ec);
- }
- }
+ if (candidate_pd.Count == argument_count && best_pd.Count == argument_count) {
+ int rating1 = 0, rating2 = 0;
+
+ for (int j = argument_count; j > 0;) {
+ j--;
+ int x, y;
+
+ Argument a = (Argument) args [j];
- // <summary>
- // Invocation of methods or delegates.
- // </summary>
- public class Invocation : Expression {
- public readonly ArrayList Arguments;
- Expression expr;
- MethodBase method = null;
-
- static Hashtable method_parameter_cache;
+ x = BetterConversion (tc, a, candidate_pd.ParameterType (j),
+ best_pd.ParameterType (j), use_standard);
+ y = BetterConversion (tc, a, best_pd.ParameterType (j),
+ candidate_pd.ParameterType (j), use_standard);
+
+ rating1 += x;
+ rating2 += y;
+ }
- static Invocation ()
- {
- method_parameter_cache = new Hashtable ();
- }
+ if (rating1 > rating2)
+ return 1;
+ else
+ return 0;
+ } else
+ return 0;
- //
- // arguments is an ArrayList, but we do not want to typecast,
- // as it might be null.
- //
- // FIXME: only allow expr to be a method invocation or a
- // delegate invocation (7.5.5)
- //
- public Invocation (Expression expr, ArrayList arguments)
- {
- this.expr = expr;
- Arguments = arguments;
- }
-
- public Expression Expr {
- get {
- return expr;
- }
}
- /// <summary>
- /// Computes whether Argument `a' and the ParameterInfo `pi' are
- /// compatible, and if so, how good is the match (in terms of
- /// "better conversions" (7.4.2.3).
- ///
- /// 0 is the best possible match.
- /// -1 represents a type mismatch.
- /// -2 represents a ref/out mismatch.
- /// </summary>
- static int Badness (Argument a, Type t)
+ public static string FullMethodDesc (MethodBase mb)
{
- if (a.Expr.Type == null){
- throw new Exception ("Expression of type " + a.Expr + " does not resolve its type");
- }
-
- if (t == a.Expr.Type)
- return 0;
+ StringBuilder sb = new StringBuilder (mb.Name);
+ ParameterData pd = GetParameterData (mb);
- // FIXME: Implement implicit conversions here.
- // FIXME: Implement better conversion here.
+ sb.Append (" (");
+ for (int i = pd.Count; i > 0;) {
+ i--;
+ sb.Append (TypeManager.CSharpName (pd.ParameterType (i)));
+ if (i != 0)
+ sb.Append (",");
+ }
- return -1;
+ sb.Append (")");
+ return sb.ToString ();
}
- // <summary>
- // Returns the Parameters (a ParameterData interface) for the
- // Method `mb'
- // </summary>
- static ParameterData GetParameterData (MethodBase mb)
+ public static MethodGroupExpr MakeUnionSet (Expression mg1, Expression mg2)
{
- object pd = method_parameter_cache [mb];
-
- if (pd != null)
- return (ParameterData) pd;
- if (mb is MethodBuilder || mb is ConstructorBuilder){
- MethodCore mc = TypeContainer.LookupMethodByBuilder (mb);
+ if (mg1 != null || mg2 != null) {
+
+ MethodGroupExpr left_set = null, right_set = null;
+ int length1 = 0, length2 = 0;
+
+ if (mg1 != null) {
+ left_set = (MethodGroupExpr) mg1;
+ length1 = left_set.Methods.Length;
+ }
+
+ if (mg2 != null) {
+ right_set = (MethodGroupExpr) mg2;
+ length2 = right_set.Methods.Length;
+ }
+
+ MemberInfo [] miset = new MemberInfo [length1 + length2];
+ if (left_set != null)
+ left_set.Methods.CopyTo (miset, 0);
+ if (right_set != null)
+ right_set.Methods.CopyTo (miset, length1);
+
+ MethodGroupExpr union = new MethodGroupExpr (miset);
- InternalParameters ip = mc.ParameterInfo;
- method_parameter_cache [mb] = ip;
+ return union;
+
+ }
- return (ParameterData) ip;
- } else {
- ParameterInfo [] pi = mb.GetParameters ();
- ReflectionParameters rp = new ReflectionParameters (pi);
- method_parameter_cache [mb] = rp;
+ return null;
- return (ParameterData) rp;
- }
}
-
+
// <summary>
// Find the Applicable Function Members (7.4.2.1)
//
//
// Arguments: ArrayList containing resolved Argument objects.
//
+ // loc: The location if we want an error to be reported, or a Null
+ // location for "probing" purposes.
+ //
+ // inside_user_defined: 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 (MethodGroupExpr me, ArrayList Arguments)
+ public static MethodBase OverloadResolve (TypeContainer tc, MethodGroupExpr me,
+ ArrayList Arguments, Location loc,
+ bool use_standard)
{
ArrayList afm = new ArrayList ();
- int best_match = 10000;
int best_match_idx = -1;
MethodBase method = null;
int argument_count;
+
+ for (int i = me.Methods.Length; i > 0; ){
+ i--;
+ MethodBase candidate = me.Methods [i];
+ int x;
+
+ x = BetterFunction (tc, Arguments, candidate, method, use_standard);
+
+ if (x == 0)
+ continue;
+ else {
+ best_match_idx = i;
+ method = me.Methods [best_match_idx];
+ }
+ }
if (Arguments == null)
argument_count = 0;
else
argument_count = Arguments.Count;
+
+ ParameterData pd;
+
+ // Now we see if we can at least find a method with the same number of arguments
+ // and then try doing implicit conversion on the arguments
+ if (best_match_idx == -1) {
+
+ for (int i = me.Methods.Length; i > 0;) {
+ i--;
+ MethodBase mb = me.Methods [i];
+ pd = GetParameterData (mb);
+
+ if (pd.Count == argument_count) {
+ best_match_idx = i;
+ method = me.Methods [best_match_idx];
+ break;
+ } else
+ continue;
+ }
- for (int i = me.Methods.Length; i > 0; ){
- i--;
- MethodBase mb = me.Methods [i];
- ParameterData pd;
+ }
- pd = GetParameterData (mb);
+ if (method == null)
+ return null;
- // If this is the case, we have a method with no args - presumably
- if (pd == null && argument_count == 0)
- return me.Methods [0];
+ // And now convert implicitly, each argument to the required type
+
+ pd = GetParameterData (method);
- //
- // Compute how good this is
- //
- if (pd.Count == argument_count){
- int badness = 0;
-
- for (int j = argument_count; j > 0;){
- int x;
- j--;
-
- Argument a = (Argument) Arguments [j];
+ for (int j = argument_count; j > 0;) {
+ j--;
+ Argument a = (Argument) Arguments [j];
+ Expression a_expr = a.Expr;
+ Type parameter_type = pd.ParameterType (j);
+
+ if (a_expr.Type != parameter_type){
+ Expression conv;
- x = Badness (a, pd.ParameterType (j));
-
- if (x < 0){
- badness = best_match;
- continue;
+ if (use_standard)
+ conv = ConvertImplicitStandard (tc, a_expr, parameter_type,
+ Location.Null);
+ else
+ conv = ConvertImplicit (tc, a_expr, parameter_type,
+ Location.Null);
+
+ if (conv == null){
+ if (!Location.IsNull (loc)) {
+ Error (tc, 1502, loc,
+ "The best overloaded match for method '" + FullMethodDesc (method) +
+ "' has some invalid arguments");
+ Error (tc, 1503, loc,
+ "Argument " + (j+1) +
+ ": Cannot convert from '" + TypeManager.CSharpName (a_expr.Type)
+ + "' to '" + TypeManager.CSharpName (pd.ParameterType (j)) + "'");
}
-
- badness += x;
- }
-
- if (badness < best_match){
- best_match = badness;
- method = me.Methods [i];
- best_match_idx = i;
+ return null;
}
+ //
+ // Update the argument with the implicit conversion
+ //
+ if (a_expr != conv)
+ a.Expr = conv;
}
}
-
- if (best_match_idx == -1)
- return null;
return method;
}
+ public static MethodBase OverloadResolve (TypeContainer tc, MethodGroupExpr me,
+ ArrayList Arguments, Location loc)
+ {
+ return OverloadResolve (tc, me, Arguments, loc, false);
+ }
- public override Expression Resolve (TypeContainer tc)
+ public override Expression DoResolve (TypeContainer tc)
{
//
// First, resolve the expression that is used to
return null;
if (!(this.expr is MethodGroupExpr)){
- tc.RootContext.Report.Error (118,
- "Denotes a non-method (Detail: ExprClass=" + this.expr.ExprClass+")");
+ report118 (tc, Location, this.expr, "method group");
return null;
}
}
}
- method = OverloadResolve ((MethodGroupExpr) this.expr, Arguments);
+ method = OverloadResolve (tc, (MethodGroupExpr) this.expr, Arguments,
+ Location);
if (method == null){
- tc.RootContext.Report.Error (-6,
- "Figure out error: Can not find a good function for this argument list");
+ Error (tc, -6, Location,
+ "Could not find any applicable function for this argument list");
return null;
}
if (method is MethodInfo)
type = ((MethodInfo)method).ReturnType;
+ eclass = ExprClass.Value;
return this;
}
- public static void EmitArguments (EmitContext ec, ArrayList Arguments)
+ public static void EmitArguments (EmitContext ec, MethodBase method, ArrayList Arguments)
{
int top;
if (!is_static){
MethodGroupExpr mg = (MethodGroupExpr) this.expr;
+ //
+ // If this is ourselves, push "this"
+ //
if (mg.InstanceExpression == null){
- Console.WriteLine ("Internal compiler error. Should check in the method groups for static/instance");
+ ec.ig.Emit (OpCodes.Ldarg_0);
+ } else {
+ //
+ // Push the instance expression
+ //
+ mg.InstanceExpression.Emit (ec);
}
-
- mg.InstanceExpression.Emit (ec);
}
if (Arguments != null)
- EmitArguments (ec, Arguments);
+ EmitArguments (ec, method, Arguments);
if (is_static){
if (method is MethodInfo)
ec.ig.Emit (OpCodes.Callvirt, (MethodInfo) method);
else
ec.ig.Emit (OpCodes.Callvirt, (ConstructorInfo) method);
- }
+ }
+ }
+
+ public override void EmitStatement (EmitContext ec)
+ {
+ Emit (ec);
+ //
+ // Pop the return value if there is one
+ //
+ if (method is MethodInfo){
+ if (((MethodInfo)method).ReturnType != TypeManager.void_type)
+ ec.ig.Emit (OpCodes.Pop);
+ }
}
}
- public class New : Expression {
+ public class New : ExpressionStatement {
public enum NType {
Object,
public readonly string Rank;
public readonly ArrayList Indices;
public readonly ArrayList Initializers;
-
+
+ Location Location;
MethodBase method = null;
- public New (string requested_type, ArrayList arguments)
+ public New (string requested_type, ArrayList arguments, Location loc)
{
RequestedType = requested_type;
Arguments = arguments;
NewType = NType.Object;
+ Location = loc;
}
- public New (string requested_type, ArrayList exprs, string rank, ArrayList initializers)
+ public New (string requested_type, ArrayList exprs, string rank, ArrayList initializers, Location loc)
{
RequestedType = requested_type;
Indices = exprs;
Rank = rank;
Initializers = initializers;
NewType = NType.Array;
+ Location = loc;
}
- public override Expression Resolve (TypeContainer tc)
+ public override Expression DoResolve (TypeContainer tc)
{
type = tc.LookupType (RequestedType, false);
Expression ml;
- ml = MemberLookup (tc.RootContext, type, ".ctor", false,
+ ml = MemberLookup (tc, type, ".ctor", false,
MemberTypes.Constructor, AllBindingsFlags);
if (! (ml is MethodGroupExpr)){
//
// FIXME: Find proper error
//
- tc.RootContext.Report.Error (118, "Did find something that is not a method");
+ report118 (tc, Location, ml, "method group");
return null;
}
}
}
- method = Invocation.OverloadResolve ((MethodGroupExpr) ml, Arguments);
+ method = Invocation.OverloadResolve (tc, (MethodGroupExpr) ml, Arguments,
+ Location);
if (method == null) {
- tc.RootContext.Report.Error (-6,
- "New invocation: Can not find a constructor for this argument list");
+ Error (tc, -6, Location,
+ "New invocation: Can not find a constructor for this argument list");
return null;
}
+ eclass = ExprClass.Value;
return this;
}
public override void Emit (EmitContext ec)
{
- Invocation.EmitArguments (ec, Arguments);
+ Invocation.EmitArguments (ec, method, Arguments);
ec.ig.Emit (OpCodes.Newobj, (ConstructorInfo) method);
}
+
+ public override void EmitStatement (EmitContext ec)
+ {
+ Emit (ec);
+ ec.ig.Emit (OpCodes.Pop);
+ }
}
- public class This : Expression {
- public override Expression Resolve (TypeContainer tc)
+ //
+ // Represents the `this' construct
+ //
+ public class This : Expression, LValue {
+ public override Expression DoResolve (TypeContainer tc)
{
- // FIXME: Implement;
+ eclass = ExprClass.Variable;
+ type = tc.TypeBuilder;
+
+ //
+ // FIXME: Verify that this is only used in instance contexts.
+ //
return this;
}
public override void Emit (EmitContext ec)
{
+ ec.ig.Emit (OpCodes.Ldarg_0);
+ }
+
+ public void Store (EmitContext ec)
+ {
+ //
+ // Assignment to the "this" variable.
+ //
+ // FIXME: Apparently this is a bug that we
+ // must catch as `this' seems to be readonly ;-)
+ //
+ ec.ig.Emit (OpCodes.Starg, 0);
+ }
+
+ public void AddressOf (EmitContext ec)
+ {
+ ec.ig.Emit (OpCodes.Ldarga_S, (byte) 0);
}
}
+ // <summary>
+ // Implements the typeof operator
+ // </summary>
public class TypeOf : Expression {
public readonly string QueriedType;
+ Type typearg;
public TypeOf (string queried_type)
{
QueriedType = queried_type;
}
- public override Expression Resolve (TypeContainer tc)
+ public override Expression DoResolve (TypeContainer tc)
{
- // FIXME: Implement;
+ typearg = tc.LookupType (QueriedType, false);
+
+ if (typearg == null)
+ return null;
+
+ type = TypeManager.type_type;
+ eclass = ExprClass.Type;
return this;
}
public override void Emit (EmitContext ec)
{
+ ec.ig.Emit (OpCodes.Ldtoken, typearg);
+ ec.ig.Emit (OpCodes.Call, TypeManager.system_type_get_type_from_handle);
}
}
this.QueriedType = queried_type;
}
- public override Expression Resolve (TypeContainer tc)
+ public override Expression DoResolve (TypeContainer tc)
{
// FIXME: Implement;
- return this;
+ throw new Exception ("Unimplemented");
+ // return this;
}
public override void Emit (EmitContext ec)
{
+ throw new Exception ("Implement me");
}
}
}
}
- public override Expression Resolve (TypeContainer tc)
+ public override Expression DoResolve (TypeContainer tc)
{
Expression new_expression = expr.Resolve (tc);
if (new_expression == null)
return null;
- Console.WriteLine ("This is what I figured: " + expr.Type + "/" + expr.ExprClass);
-
- member_lookup = MemberLookup (tc.RootContext, expr.Type, Identifier, false);
+ member_lookup = MemberLookup (tc, expr.Type, Identifier, false);
if (member_lookup is MethodGroupExpr){
MethodGroupExpr mg = (MethodGroupExpr) member_lookup;
// FIXME: This is a horrible way of detecting if it is
// an instance expression. Figure out how to fix this.
//
- Console.WriteLine ("FIXME: Horrible way of figuring if something is an isntance");
- if (expr is LocalVariableReference)
+ if (expr is LocalVariableReference ||
+ expr is ParameterReference ||
+ expr is FieldExpr)
mg.InstanceExpression = expr;
+ return member_lookup;
+ } else if (member_lookup is FieldExpr){
+ FieldExpr fe = (FieldExpr) member_lookup;
+
+ fe.Instance = expr;
+
return member_lookup;
} else
//
// ie, for a Property Access, it should like call it
// and stuff.
- return null;
+ return member_lookup;
}
public override void Emit (EmitContext ec)
{
+ throw new Exception ("Should not happen I think");
}
}
eclass = ExprClass.Namespace;
}
- public override Expression Resolve (TypeContainer tc)
+ public override Expression DoResolve (TypeContainer tc)
{
return this;
}
public override void Emit (EmitContext ec)
{
+ throw new Exception ("Namespace expressions should never be emitted");
}
}
eclass = ExprClass.Type;
}
- override public Expression Resolve (TypeContainer tc)
+ override public Expression DoResolve (TypeContainer tc)
{
return this;
}
override public void Emit (EmitContext ec)
{
-
+ throw new Exception ("Implement me");
}
}
}
}
- override public Expression Resolve (TypeContainer tc)
+ override public Expression DoResolve (TypeContainer tc)
{
return this;
}
override public void Emit (EmitContext ec)
{
-
+ throw new Exception ("This should never be reached");
}
}
- public class BuiltinTypeAccess : Expression {
- public readonly string AccessBase;
- public readonly string Method;
-
- public BuiltinTypeAccess (string type, string method)
- {
- System.Console.WriteLine ("DUDE! This type should be fully resolved!");
- AccessBase = type;
- Method = method;
- }
-
- public override Expression Resolve (TypeContainer tc)
- {
- // FIXME: Implement;
- return this;
- }
-
- public override void Emit (EmitContext ec)
- {
- }
- }
-
-
// Fully resolved expression that evaluates to a Field
// </summary>
- public class FieldExpr : Expression {
+ public class FieldExpr : Expression, LValue {
public readonly FieldInfo FieldInfo;
-
+ public Expression Instance;
+
public FieldExpr (FieldInfo fi)
{
FieldInfo = fi;
type = fi.FieldType;
}
- override public Expression Resolve (TypeContainer tc)
+ override public Expression DoResolve (TypeContainer tc)
{
- // We are born in resolved state.
+ if (!FieldInfo.IsStatic){
+ if (Instance == null){
+ throw new Exception ("non-static FieldExpr without instance var\n" +
+ "You have to assign the Instance variable\n" +
+ "Of the FieldExpr to set this\n");
+ }
+
+ Instance = Instance.Resolve (tc);
+ if (Instance == null)
+ return null;
+
+ }
return this;
}
override public void Emit (EmitContext ec)
{
- // FIXME: Assert that this should not be reached?
+ ILGenerator ig = ec.ig;
+
+ if (FieldInfo.IsStatic)
+ ig.Emit (OpCodes.Ldsfld, FieldInfo);
+ else {
+ Instance.Emit (ec);
+
+ ig.Emit (OpCodes.Ldfld, FieldInfo);
+ }
+ }
+
+ public void Store (EmitContext ec)
+ {
+ if (FieldInfo.IsStatic)
+ ec.ig.Emit (OpCodes.Stsfld, FieldInfo);
+ else
+ ec.ig.Emit (OpCodes.Stfld, FieldInfo);
+ }
+
+ public void AddressOf (EmitContext ec)
+ {
+ if (FieldInfo.IsStatic)
+ ec.ig.Emit (OpCodes.Ldsflda, FieldInfo);
+ else {
+ Instance.Emit (ec);
+ ec.ig.Emit (OpCodes.Ldflda, FieldInfo);
+ }
}
}
type = pi.PropertyType;
}
- override public Expression Resolve (TypeContainer tc)
+ override public Expression DoResolve (TypeContainer tc)
{
// We are born in resolved state.
return this;
override public void Emit (EmitContext ec)
{
- // FIXME: Implement.
+ // FIXME: Implement;
+ throw new Exception ("Unimplemented");
}
}
// <summary>
- // Fully resolved expression that evaluates to a Property
+ // Fully resolved expression that evaluates to a Expression
// </summary>
public class EventExpr : Expression {
public readonly EventInfo EventInfo;
eclass = ExprClass.EventAccess;
}
- override public Expression Resolve (TypeContainer tc)
+ override public Expression DoResolve (TypeContainer tc)
{
// We are born in resolved state.
return this;
override public void Emit (EmitContext ec)
{
+ throw new Exception ("Implement me");
// FIXME: Implement.
}
}
public class CheckedExpr : Expression {
- public readonly Expression Expr;
+ public Expression Expr;
public CheckedExpr (Expression e)
{
Expr = e;
}
- public override Expression Resolve (TypeContainer tc)
+ public override Expression DoResolve (TypeContainer tc)
{
- // FIXME : Implement !
+ Expr = Expr.Resolve (tc);
+
+ if (Expr == null)
+ return null;
+
+ eclass = Expr.ExprClass;
+ type = Expr.Type;
return this;
}
public override void Emit (EmitContext ec)
{
+ bool last_check = ec.CheckState;
+
+ ec.CheckState = true;
+ Expr.Emit (ec);
+ ec.CheckState = last_check;
}
}
public class UnCheckedExpr : Expression {
- public readonly Expression Expr;
+ public Expression Expr;
public UnCheckedExpr (Expression e)
{
Expr = e;
}
- public override Expression Resolve (TypeContainer tc)
+ public override Expression DoResolve (TypeContainer tc)
{
- // FIXME : Implement !
+ Expr = Expr.Resolve (tc);
+
+ if (Expr == null)
+ return null;
+
+ eclass = Expr.ExprClass;
+ type = Expr.Type;
return this;
}
public override void Emit (EmitContext ec)
{
+ bool last_check = ec.CheckState;
+
+ ec.CheckState = false;
+ Expr.Emit (ec);
+ ec.CheckState = last_check;
}
}
Arguments = e_list;
}
- public override Expression Resolve (TypeContainer tc)
+ public override Expression DoResolve (TypeContainer tc)
{
- // FIXME : Implement
- return this;
+ // FIXME: Implement;
+ throw new Exception ("Unimplemented");
+ // return this;
}
public override void Emit (EmitContext ec)
{
// FIXME : Implement !
+ throw new Exception ("Unimplemented");
}
}
}
- public override Expression Resolve (TypeContainer tc)
+ public override Expression DoResolve (TypeContainer tc)
{
- // FIXME : Implement !
+ // FIXME: Implement;
+ throw new Exception ("Unimplemented");
+ // return this;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ throw new Exception ("Unimplemented");
+ }
+ }
+
+ public class UserImplicitCast : Expression {
+ MethodBase method;
+ ArrayList arguments;
+
+ public UserImplicitCast (MethodInfo method, ArrayList arguments)
+ {
+ this.method = method;
+ this.arguments = arguments;
+ type = method.ReturnType;
+ eclass = ExprClass.Value;
+ }
+
+ public override Expression DoResolve (TypeContainer tc)
+ {
+ //
+ // We are born in a fully resolved state
+ //
return this;
}
public override void Emit (EmitContext ec)
{
+ ILGenerator ig = ec.ig;
+
+ // Note that operators are static anyway
+
+ if (arguments != null)
+ Invocation.EmitArguments (ec, method, arguments);
+
+ if (method is MethodInfo)
+ ig.Emit (OpCodes.Call, (MethodInfo) method);
+ else
+ ig.Emit (OpCodes.Call, (ConstructorInfo) method);
}
+
}
}
projects / mono.git / blobdiff