{
public Expression Expr;
- public ParenthesizedExpression (Expression expr, Location loc)
+ public ParenthesizedExpression (Expression expr)
{
this.Expr = expr;
- this.loc = loc;
}
public override Expression DoResolve (EmitContext ec)
{
throw new Exception ("Should not happen");
}
+
+ public override Location Location
+ {
+ get {
+ return Expr.Location;
+ }
+ }
}
/// <summary>
void Error23 (Type t)
{
- Error (
- 23, "Operator " + OperName (Oper) +
- " cannot be applied to operand of type `" +
- TypeManager.CSharpName (t) + "'");
+ Report.Error (23, loc, "Operator `{0}' cannot be applied to operand of type `{1}'",
+ OperName (Oper), TypeManager.CSharpName (t));
}
/// <remarks>
Expression e = null;
if (expr is IntConstant)
- e = new IntConstant (-((IntConstant) expr).Value);
+ e = new IntConstant (-((IntConstant) expr).Value, expr.Location);
else if (expr is UIntConstant){
uint value = ((UIntConstant) expr).Value;
if (value < 2147483649)
- return new IntConstant (-(int)value);
+ return new IntConstant (-(int)value, expr.Location);
else
- e = new LongConstant (-value);
+ e = new LongConstant (-value, expr.Location);
}
else if (expr is LongConstant)
- e = new LongConstant (-((LongConstant) expr).Value);
+ e = new LongConstant (-((LongConstant) expr).Value, expr.Location);
else if (expr is ULongConstant){
ulong value = ((ULongConstant) expr).Value;
if (value < 9223372036854775809)
- return new LongConstant(-(long)value);
+ return new LongConstant(-(long)value, expr.Location);
}
else if (expr is FloatConstant)
- e = new FloatConstant (-((FloatConstant) expr).Value);
+ e = new FloatConstant (-((FloatConstant) expr).Value, expr.Location);
else if (expr is DoubleConstant)
- e = new DoubleConstant (-((DoubleConstant) expr).Value);
+ e = new DoubleConstant (-((DoubleConstant) expr).Value, expr.Location);
else if (expr is DecimalConstant)
- e = new DecimalConstant (-((DecimalConstant) expr).Value);
+ e = new DecimalConstant (-((DecimalConstant) expr).Value, expr.Location);
else if (expr is ShortConstant)
- e = new IntConstant (-((ShortConstant) expr).Value);
+ e = new IntConstant (-((ShortConstant) expr).Value, expr.Location);
else if (expr is UShortConstant)
- e = new IntConstant (-((UShortConstant) expr).Value);
+ e = new IntConstant (-((UShortConstant) expr).Value, expr.Location);
else if (expr is SByteConstant)
- e = new IntConstant (-((SByteConstant) expr).Value);
+ e = new IntConstant (-((SByteConstant) expr).Value, expr.Location);
else if (expr is ByteConstant)
- e = new IntConstant (-((ByteConstant) expr).Value);
+ e = new IntConstant (-((ByteConstant) expr).Value, expr.Location);
return e;
}
switch (Oper){
case Operator.UnaryPlus:
+ if (expr_type == TypeManager.bool_type){
+ result = null;
+ Error23 (expr_type);
+ return false;
+ }
+
result = e;
return true;
}
BoolConstant b = (BoolConstant) e;
- result = new BoolConstant (!(b.Value));
+ result = new BoolConstant (!(b.Value), b.Location);
return true;
case Operator.OnesComplement:
}
if (expr_type == TypeManager.int32_type){
- result = new IntConstant (~ ((IntConstant) e).Value);
+ result = new IntConstant (~ ((IntConstant) e).Value, e.Location);
} else if (expr_type == TypeManager.uint32_type){
- result = new UIntConstant (~ ((UIntConstant) e).Value);
+ result = new UIntConstant (~ ((UIntConstant) e).Value, e.Location);
} else if (expr_type == TypeManager.int64_type){
- result = new LongConstant (~ ((LongConstant) e).Value);
+ result = new LongConstant (~ ((LongConstant) e).Value, e.Location);
} else if (expr_type == TypeManager.uint64_type){
- result = new ULongConstant (~ ((ULongConstant) e).Value);
+ result = new ULongConstant (~ ((ULongConstant) e).Value, e.Location);
} else {
result = null;
Error23 (expr_type);
Expression e;
e = Convert.ImplicitConversion (ec, Expr, TypeManager.int32_type, loc);
- if (e != null){
- type = TypeManager.int32_type;
- return this;
- }
+ if (e != null)
+ goto ok;
e = Convert.ImplicitConversion (ec, Expr, TypeManager.uint32_type, loc);
- if (e != null){
- type = TypeManager.uint32_type;
- return this;
- }
+ if (e != null)
+ goto ok;
e = Convert.ImplicitConversion (ec, Expr, TypeManager.int64_type, loc);
- if (e != null){
- type = TypeManager.int64_type;
- return this;
- }
+ if (e != null)
+ goto ok;
e = Convert.ImplicitConversion (ec, Expr, TypeManager.uint64_type, loc);
- if (e != null){
- type = TypeManager.uint64_type;
- return this;
- }
+ if (e != null)
+ goto ok;
Error23 (expr_type);
return null;
+ ok:
+ Expr = e;
+ expr_type = e.Type;
}
+
type = expr_type;
return this;
}
IVariable variable = Expr as IVariable;
- bool is_fixed = variable != null && variable.VerifyFixed (false);
+ bool is_fixed = variable != null && variable.VerifyFixed ();
if (!ec.InFixedInitializer && !is_fixed) {
- Error (212, "You can only take the address of an unfixed expression inside " +
+ Error (212, "You can only take the address of unfixed expression inside " +
"of a fixed statement initializer");
return null;
}
if (ec.InFixedInitializer && is_fixed) {
- Error (213, "You can not fix an already fixed expression");
+ Error (213, "You cannot use the fixed statement to take the address of an already fixed expression");
return null;
}
}
if (!expr_type.IsPointer){
- Error (193, "The * or -> operator can only be applied to pointers");
+ Error (193, "The * or -> operator must be applied to a pointer");
return null;
}
Expr = Expr.DoResolveLValue (ec, new EmptyExpression ());
if (Expr == null || Expr.eclass != ExprClass.Variable){
- Error (211, "Cannot take the address of non-variables");
+ Error (211, "Cannot take the address of the given expression");
return null;
}
}
eclass = ExprClass.Variable;
loc = l;
}
-
- void LoadExprValue (EmitContext ec)
- {
- }
public override void Emit (EmitContext ec)
{
}
}
- public bool VerifyFixed (bool is_expression)
+ public bool VerifyFixed ()
{
+ // A pointer-indirection is always fixed.
return true;
}
"++" : "--";
}
- void Error23 (Type t)
- {
- Error (
- 23, "Operator " + OperName (mode) +
- " 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
return null;
}
} else if (expr.eclass == ExprClass.IndexerAccess || expr.eclass == ExprClass.PropertyAccess){
- expr = expr.ResolveLValue (ec, this);
+ expr = expr.ResolveLValue (ec, this, Location);
if (expr == null)
return null;
} else {
- expr.Error_UnexpectedKind ("variable, indexer or property access", loc);
+ expr.Error_UnexpectedKind (ec, "variable, indexer or property access", loc);
return null;
}
return null;
probe_type = texpr.ResolveType (ec);
- CheckObsoleteAttribute (probe_type);
-
expr = expr.Resolve (ec);
if (expr == null)
return null;
// then e != null (objects) or true (value types)
//
e = Convert.ImplicitConversionStandard (ec, expr, probe_type, loc);
- if (e != null){
+ if (e != null && !(e is NullCast)){
expr = e;
if (etype.IsValueType)
action = Action.AlwaysTrue;
}
if (warning_always_matches)
- Warning (183, "The given expression is always of the provided ('{0}') type", TypeManager.CSharpName (probe_type));
+ Report.Warning (183, 1, loc, "The given expression is always of the provided (`{0}') type", TypeManager.CSharpName (probe_type));
else if (warning_never_matches){
if (!(probe_type.IsInterface || expr.Type.IsInterface))
- Warning (184, "The given expression is never of the provided ('{0}') type", TypeManager.CSharpName (probe_type));
+ Report.Warning (184, 1, loc, "The given expression is never of the provided (`{0}') type", TypeManager.CSharpName (probe_type));
}
return this;
}
bool do_isinst = false;
+ Expression resolved_type;
public override void Emit (EmitContext ec)
{
static void Error_CannotConvertType (Type source, Type target, Location loc)
{
- Report.Error (
- 39, loc, "as operator can not convert from `" +
- TypeManager.CSharpName (source) + "' to `" +
- TypeManager.CSharpName (target) + "'");
+ Report.Error (39, loc, "Cannot convert type `{0}' to `{1}' via a built-in conversion",
+ TypeManager.CSharpName (source),
+ TypeManager.CSharpName (target));
}
public override Expression DoResolve (EmitContext ec)
{
- Expression e = base.DoResolve (ec);
+ if (resolved_type == null) {
+ resolved_type = base.DoResolve (ec);
- if (e == null)
- return null;
+ if (resolved_type == null)
+ return null;
+ }
type = probe_type;
eclass = ExprClass.Value;
Type etype = expr.Type;
if (TypeManager.IsValueType (probe_type)){
- Report.Error (77, loc, "The as operator should be used with a reference type only (" +
- TypeManager.CSharpName (probe_type) + " is a value type)");
+ Report.Error (77, loc, "The as operator must be used with a reference type (`" +
+ TypeManager.CSharpName (probe_type) + "' is a value type)");
return null;
}
- e = Convert.ImplicitConversion (ec, expr, probe_type, loc);
+ Expression e = Convert.ImplicitConversion (ec, expr, probe_type, loc);
if (e != null){
expr = e;
do_isinst = false;
Expression target_type;
Expression expr;
+ public Cast (Expression cast_type, Expression expr)
+ : this (cast_type, expr, cast_type.Location)
+ {
+ }
+
public Cast (Expression cast_type, Expression expr, Location loc)
{
this.target_type = cast_type;
expr = value;
}
}
-
- bool CheckRange (EmitContext ec, long value, Type type, long min, long max)
- {
- if (!ec.ConstantCheckState)
- return true;
-
- if ((value < min) || (value > max)) {
- Error (221, "Constant value `" + value + "' cannot be converted " +
- "to a `" + TypeManager.CSharpName (type) + "' (use `unchecked' " +
- "syntax to override)");
- return false;
- }
-
- return true;
- }
-
- bool CheckRange (EmitContext ec, ulong value, Type type, ulong max)
- {
- if (!ec.ConstantCheckState)
- return true;
-
- if (value > max) {
- Error (221, "Constant value `" + value + "' cannot be converted " +
- "to a `" + TypeManager.CSharpName (type) + "' (use `unchecked' " +
- "syntax to override)");
- return false;
- }
-
- return true;
- }
-
- bool CheckUnsigned (EmitContext ec, long value, Type type)
- {
- if (!ec.ConstantCheckState)
- return true;
-
- if (value < 0) {
- Error (221, "Constant value `" + value + "' cannot be converted " +
- "to a `" + TypeManager.CSharpName (type) + "' (use `unchecked' " +
- "syntax to override)");
- return false;
- }
-
- return true;
- }
-
- /// <summary>
- /// Attempts to do a compile-time folding of a constant cast.
- /// </summary>
- Expression TryReduce (EmitContext ec, Type target_type)
- {
- Expression real_expr = expr;
- if (real_expr is EnumConstant)
- real_expr = ((EnumConstant) real_expr).Child;
-
- if (real_expr is ByteConstant){
- byte v = ((ByteConstant) real_expr).Value;
-
- if (target_type == TypeManager.sbyte_type) {
- if (!CheckRange (ec, v, target_type, SByte.MinValue, SByte.MaxValue))
- return null;
- return new SByteConstant ((sbyte) v);
- }
- if (target_type == TypeManager.short_type)
- return new ShortConstant ((short) v);
- if (target_type == TypeManager.ushort_type)
- return new UShortConstant ((ushort) v);
- if (target_type == TypeManager.int32_type)
- return new IntConstant ((int) v);
- if (target_type == TypeManager.uint32_type)
- return new UIntConstant ((uint) v);
- if (target_type == TypeManager.int64_type)
- return new LongConstant ((long) v);
- if (target_type == TypeManager.uint64_type)
- return new ULongConstant ((ulong) v);
- if (target_type == TypeManager.float_type)
- return new FloatConstant ((float) v);
- if (target_type == TypeManager.double_type)
- return new DoubleConstant ((double) v);
- if (target_type == TypeManager.char_type)
- return new CharConstant ((char) v);
- if (target_type == TypeManager.decimal_type)
- return new DecimalConstant ((decimal) v);
- }
- if (real_expr is SByteConstant){
- sbyte v = ((SByteConstant) real_expr).Value;
-
- if (target_type == TypeManager.byte_type) {
- if (!CheckUnsigned (ec, v, target_type))
- return null;
- return new ByteConstant ((byte) v);
- }
- if (target_type == TypeManager.short_type)
- return new ShortConstant ((short) v);
- if (target_type == TypeManager.ushort_type) {
- if (!CheckUnsigned (ec, v, target_type))
- return null;
- return new UShortConstant ((ushort) v);
- } if (target_type == TypeManager.int32_type)
- return new IntConstant ((int) v);
- if (target_type == TypeManager.uint32_type) {
- if (!CheckUnsigned (ec, v, target_type))
- return null;
- return new UIntConstant ((uint) v);
- } if (target_type == TypeManager.int64_type)
- return new LongConstant ((long) v);
- if (target_type == TypeManager.uint64_type) {
- if (!CheckUnsigned (ec, v, target_type))
- return null;
- return new ULongConstant ((ulong) v);
- }
- if (target_type == TypeManager.float_type)
- return new FloatConstant ((float) v);
- if (target_type == TypeManager.double_type)
- return new DoubleConstant ((double) v);
- if (target_type == TypeManager.char_type) {
- if (!CheckUnsigned (ec, v, target_type))
- return null;
- return new CharConstant ((char) v);
- }
- if (target_type == TypeManager.decimal_type)
- return new DecimalConstant ((decimal) v);
- }
- if (real_expr is ShortConstant){
- short v = ((ShortConstant) real_expr).Value;
-
- if (target_type == TypeManager.byte_type) {
- if (!CheckRange (ec, v, target_type, Byte.MinValue, Byte.MaxValue))
- return null;
- return new ByteConstant ((byte) v);
- }
- if (target_type == TypeManager.sbyte_type) {
- if (!CheckRange (ec, v, target_type, SByte.MinValue, SByte.MaxValue))
- return null;
- return new SByteConstant ((sbyte) v);
- }
- if (target_type == TypeManager.ushort_type) {
- if (!CheckUnsigned (ec, v, target_type))
- return null;
- return new UShortConstant ((ushort) v);
- }
- if (target_type == TypeManager.int32_type)
- return new IntConstant ((int) v);
- if (target_type == TypeManager.uint32_type) {
- if (!CheckUnsigned (ec, v, target_type))
- return null;
- return new UIntConstant ((uint) v);
- }
- if (target_type == TypeManager.int64_type)
- return new LongConstant ((long) v);
- if (target_type == TypeManager.uint64_type) {
- if (!CheckUnsigned (ec, v, target_type))
- return null;
- return new ULongConstant ((ulong) v);
- }
- if (target_type == TypeManager.float_type)
- return new FloatConstant ((float) v);
- if (target_type == TypeManager.double_type)
- return new DoubleConstant ((double) v);
- if (target_type == TypeManager.char_type) {
- if (!CheckRange (ec, v, target_type, Char.MinValue, Char.MaxValue))
- return null;
- return new CharConstant ((char) v);
- }
- if (target_type == TypeManager.decimal_type)
- return new DecimalConstant ((decimal) v);
- }
- if (real_expr is UShortConstant){
- ushort v = ((UShortConstant) real_expr).Value;
-
- if (target_type == TypeManager.byte_type) {
- if (!CheckRange (ec, v, target_type, Byte.MinValue, Byte.MaxValue))
- return null;
- return new ByteConstant ((byte) v);
- }
- if (target_type == TypeManager.sbyte_type) {
- if (!CheckRange (ec, v, target_type, SByte.MinValue, SByte.MaxValue))
- return null;
- return new SByteConstant ((sbyte) v);
- }
- if (target_type == TypeManager.short_type) {
- if (!CheckRange (ec, v, target_type, Int16.MinValue, Int16.MaxValue))
- return null;
- return new ShortConstant ((short) v);
- }
- if (target_type == TypeManager.int32_type)
- return new IntConstant ((int) v);
- if (target_type == TypeManager.uint32_type)
- return new UIntConstant ((uint) v);
- if (target_type == TypeManager.int64_type)
- return new LongConstant ((long) v);
- if (target_type == TypeManager.uint64_type)
- return new ULongConstant ((ulong) v);
- if (target_type == TypeManager.float_type)
- return new FloatConstant ((float) v);
- if (target_type == TypeManager.double_type)
- return new DoubleConstant ((double) v);
- if (target_type == TypeManager.char_type) {
- if (!CheckRange (ec, v, target_type, Char.MinValue, Char.MaxValue))
- return null;
- return new CharConstant ((char) v);
- }
- if (target_type == TypeManager.decimal_type)
- return new DecimalConstant ((decimal) v);
- }
- if (real_expr is IntConstant){
- int v = ((IntConstant) real_expr).Value;
-
- if (target_type == TypeManager.byte_type) {
- if (!CheckRange (ec, v, target_type, Byte.MinValue, Byte.MaxValue))
- return null;
- return new ByteConstant ((byte) v);
- }
- if (target_type == TypeManager.sbyte_type) {
- if (!CheckRange (ec, v, target_type, SByte.MinValue, SByte.MaxValue))
- return null;
- return new SByteConstant ((sbyte) v);
- }
- if (target_type == TypeManager.short_type) {
- if (!CheckRange (ec, v, target_type, Int16.MinValue, Int16.MaxValue))
- return null;
- return new ShortConstant ((short) v);
- }
- if (target_type == TypeManager.ushort_type) {
- if (!CheckRange (ec, v, target_type, UInt16.MinValue, UInt16.MaxValue))
- return null;
- return new UShortConstant ((ushort) v);
- }
- if (target_type == TypeManager.uint32_type) {
- if (!CheckRange (ec, v, target_type, Int32.MinValue, Int32.MaxValue))
- return null;
- return new UIntConstant ((uint) v);
- }
- if (target_type == TypeManager.int64_type)
- return new LongConstant ((long) v);
- if (target_type == TypeManager.uint64_type) {
- if (!CheckUnsigned (ec, v, target_type))
- return null;
- return new ULongConstant ((ulong) v);
- }
- if (target_type == TypeManager.float_type)
- return new FloatConstant ((float) v);
- if (target_type == TypeManager.double_type)
- return new DoubleConstant ((double) v);
- if (target_type == TypeManager.char_type) {
- if (!CheckRange (ec, v, target_type, Char.MinValue, Char.MaxValue))
- return null;
- return new CharConstant ((char) v);
- }
- if (target_type == TypeManager.decimal_type)
- return new DecimalConstant ((decimal) v);
- }
- if (real_expr is UIntConstant){
- uint v = ((UIntConstant) real_expr).Value;
-
- if (target_type == TypeManager.byte_type) {
- if (!CheckRange (ec, v, target_type, Char.MinValue, Char.MaxValue))
- return null;
- return new ByteConstant ((byte) v);
- }
- if (target_type == TypeManager.sbyte_type) {
- if (!CheckRange (ec, v, target_type, SByte.MinValue, SByte.MaxValue))
- return null;
- return new SByteConstant ((sbyte) v);
- }
- if (target_type == TypeManager.short_type) {
- if (!CheckRange (ec, v, target_type, Int16.MinValue, Int16.MaxValue))
- return null;
- return new ShortConstant ((short) v);
- }
- if (target_type == TypeManager.ushort_type) {
- if (!CheckRange (ec, v, target_type, UInt16.MinValue, UInt16.MaxValue))
- return null;
- return new UShortConstant ((ushort) v);
- }
- if (target_type == TypeManager.int32_type) {
- if (!CheckRange (ec, v, target_type, Int32.MinValue, Int32.MaxValue))
- return null;
- return new IntConstant ((int) v);
- }
- if (target_type == TypeManager.int64_type)
- return new LongConstant ((long) v);
- if (target_type == TypeManager.uint64_type)
- return new ULongConstant ((ulong) v);
- if (target_type == TypeManager.float_type)
- return new FloatConstant ((float) v);
- if (target_type == TypeManager.double_type)
- return new DoubleConstant ((double) v);
- if (target_type == TypeManager.char_type) {
- if (!CheckRange (ec, v, target_type, Char.MinValue, Char.MaxValue))
- return null;
- return new CharConstant ((char) v);
- }
- if (target_type == TypeManager.decimal_type)
- return new DecimalConstant ((decimal) v);
- }
- if (real_expr is LongConstant){
- long v = ((LongConstant) real_expr).Value;
-
- if (target_type == TypeManager.byte_type) {
- if (!CheckRange (ec, v, target_type, Byte.MinValue, Byte.MaxValue))
- return null;
- return new ByteConstant ((byte) v);
- }
- if (target_type == TypeManager.sbyte_type) {
- if (!CheckRange (ec, v, target_type, SByte.MinValue, SByte.MaxValue))
- return null;
- return new SByteConstant ((sbyte) v);
- }
- if (target_type == TypeManager.short_type) {
- if (!CheckRange (ec, v, target_type, Int16.MinValue, Int16.MaxValue))
- return null;
- return new ShortConstant ((short) v);
- }
- if (target_type == TypeManager.ushort_type) {
- if (!CheckRange (ec, v, target_type, UInt16.MinValue, UInt16.MaxValue))
- return null;
- return new UShortConstant ((ushort) v);
- }
- if (target_type == TypeManager.int32_type) {
- if (!CheckRange (ec, v, target_type, Int32.MinValue, Int32.MaxValue))
- return null;
- return new IntConstant ((int) v);
- }
- if (target_type == TypeManager.uint32_type) {
- if (!CheckRange (ec, v, target_type, UInt32.MinValue, UInt32.MaxValue))
- return null;
- return new UIntConstant ((uint) v);
- }
- if (target_type == TypeManager.uint64_type) {
- if (!CheckUnsigned (ec, v, target_type))
- return null;
- return new ULongConstant ((ulong) v);
- }
- if (target_type == TypeManager.float_type)
- return new FloatConstant ((float) v);
- if (target_type == TypeManager.double_type)
- return new DoubleConstant ((double) v);
- if (target_type == TypeManager.char_type) {
- if (!CheckRange (ec, v, target_type, Char.MinValue, Char.MaxValue))
- return null;
- return new CharConstant ((char) v);
- }
- if (target_type == TypeManager.decimal_type)
- return new DecimalConstant ((decimal) v);
- }
- if (real_expr is ULongConstant){
- ulong v = ((ULongConstant) real_expr).Value;
-
- if (target_type == TypeManager.byte_type) {
- if (!CheckRange (ec, v, target_type, Byte.MaxValue))
- return null;
- return new ByteConstant ((byte) v);
- }
- if (target_type == TypeManager.sbyte_type) {
- if (!CheckRange (ec, v, target_type, (ulong) SByte.MaxValue))
- return null;
- return new SByteConstant ((sbyte) v);
- }
- if (target_type == TypeManager.short_type) {
- if (!CheckRange (ec, v, target_type, (ulong) Int16.MaxValue))
- return null;
- return new ShortConstant ((short) v);
- }
- if (target_type == TypeManager.ushort_type) {
- if (!CheckRange (ec, v, target_type, UInt16.MaxValue))
- return null;
- return new UShortConstant ((ushort) v);
- }
- if (target_type == TypeManager.int32_type) {
- if (!CheckRange (ec, v, target_type, Int32.MaxValue))
- return null;
- return new IntConstant ((int) v);
- }
- if (target_type == TypeManager.uint32_type) {
- if (!CheckRange (ec, v, target_type, UInt32.MaxValue))
- return null;
- return new UIntConstant ((uint) v);
- }
- if (target_type == TypeManager.int64_type) {
- if (!CheckRange (ec, v, target_type, (ulong) Int64.MaxValue))
- return null;
- return new LongConstant ((long) v);
- }
- if (target_type == TypeManager.float_type)
- return new FloatConstant ((float) v);
- if (target_type == TypeManager.double_type)
- return new DoubleConstant ((double) v);
- if (target_type == TypeManager.char_type) {
- if (!CheckRange (ec, v, target_type, Char.MaxValue))
- return null;
- return new CharConstant ((char) v);
- }
- if (target_type == TypeManager.decimal_type)
- return new DecimalConstant ((decimal) v);
- }
- if (real_expr is FloatConstant){
- float v = ((FloatConstant) real_expr).Value;
-
- if (target_type == TypeManager.byte_type)
- return new ByteConstant ((byte) v);
- if (target_type == TypeManager.sbyte_type)
- return new SByteConstant ((sbyte) v);
- if (target_type == TypeManager.short_type)
- return new ShortConstant ((short) v);
- if (target_type == TypeManager.ushort_type)
- return new UShortConstant ((ushort) v);
- if (target_type == TypeManager.int32_type)
- return new IntConstant ((int) v);
- if (target_type == TypeManager.uint32_type)
- return new UIntConstant ((uint) v);
- if (target_type == TypeManager.int64_type)
- return new LongConstant ((long) v);
- if (target_type == TypeManager.uint64_type)
- return new ULongConstant ((ulong) v);
- if (target_type == TypeManager.double_type)
- return new DoubleConstant ((double) v);
- if (target_type == TypeManager.char_type)
- return new CharConstant ((char) v);
- if (target_type == TypeManager.decimal_type)
- return new DecimalConstant ((decimal) v);
- }
- if (real_expr is DoubleConstant){
- double v = ((DoubleConstant) real_expr).Value;
-
- if (target_type == TypeManager.byte_type){
- return new ByteConstant ((byte) v);
- } if (target_type == TypeManager.sbyte_type)
- return new SByteConstant ((sbyte) v);
- if (target_type == TypeManager.short_type)
- return new ShortConstant ((short) v);
- if (target_type == TypeManager.ushort_type)
- return new UShortConstant ((ushort) v);
- if (target_type == TypeManager.int32_type)
- return new IntConstant ((int) v);
- if (target_type == TypeManager.uint32_type)
- return new UIntConstant ((uint) v);
- if (target_type == TypeManager.int64_type)
- return new LongConstant ((long) v);
- if (target_type == TypeManager.uint64_type)
- return new ULongConstant ((ulong) v);
- if (target_type == TypeManager.float_type)
- return new FloatConstant ((float) v);
- if (target_type == TypeManager.char_type)
- return new CharConstant ((char) v);
- if (target_type == TypeManager.decimal_type)
- return new DecimalConstant ((decimal) v);
- }
-
- if (real_expr is CharConstant){
- char v = ((CharConstant) real_expr).Value;
-
- if (target_type == TypeManager.byte_type) {
- if (!CheckRange (ec, v, target_type, Byte.MinValue, Byte.MaxValue))
- return null;
- return new ByteConstant ((byte) v);
- }
- if (target_type == TypeManager.sbyte_type) {
- if (!CheckRange (ec, v, target_type, SByte.MinValue, SByte.MaxValue))
- return null;
- return new SByteConstant ((sbyte) v);
- }
- if (target_type == TypeManager.short_type) {
- if (!CheckRange (ec, v, target_type, Int16.MinValue, Int16.MaxValue))
- return null;
- return new ShortConstant ((short) v);
- }
- if (target_type == TypeManager.int32_type)
- return new IntConstant ((int) v);
- if (target_type == TypeManager.uint32_type)
- return new UIntConstant ((uint) v);
- if (target_type == TypeManager.int64_type)
- return new LongConstant ((long) v);
- if (target_type == TypeManager.uint64_type)
- return new ULongConstant ((ulong) v);
- if (target_type == TypeManager.float_type)
- return new FloatConstant ((float) v);
- if (target_type == TypeManager.double_type)
- return new DoubleConstant ((double) v);
- if (target_type == TypeManager.char_type) {
- if (!CheckRange (ec, v, target_type, Char.MinValue, Char.MaxValue))
- return null;
- return new CharConstant ((char) v);
- }
- if (target_type == TypeManager.decimal_type)
- return new DecimalConstant ((decimal) v);
- }
-
- return null;
- }
public override Expression DoResolveLValue (EmitContext ec, Expression right_side)
{
type = target.ResolveType (ec);
- CheckObsoleteAttribute (type);
-
if (type.IsAbstract && type.IsSealed) {
- Report.Error (716, loc, "Cannot convert to static type '{0}'", TypeManager.CSharpName (type));
+ Report.Error (716, loc, "Cannot convert to static type `{0}'", TypeManager.CSharpName (type));
return null;
}
eclass = ExprClass.Value;
- if (expr is Constant){
- Expression e = TryReduce (ec, type);
-
- if (e != null)
- return e;
+ Constant c = expr as Constant;
+ if (c != null) {
+ c = c.TryReduce (ec, type, loc);
+ if (c != null)
+ return c;
}
if (type.IsPointer && !ec.InUnsafe) {
oper_names [(int) Operator.LogicalAnd] = "op_LogicalAnd";
}
- public Binary (Operator oper, Expression left, Expression right, Location loc)
+ public Binary (Operator oper, Expression left, Expression right)
{
this.oper = oper;
this.left = left;
this.right = right;
- this.loc = loc;
+ this.loc = left.Location;
}
public Operator Oper {
/// <summary>
/// Returns a stringified representation of the Operator
/// </summary>
- static string OperName (Operator oper)
+ public static string OperName (Operator oper)
{
switch (oper){
case Operator.Multiply:
// type, otherwise ConvertImplict() already finds the user-defined conversion for us,
// so we don't explicitly check for performance reasons.
//
- bool DoNumericPromotions (EmitContext ec, Type l, Type r, bool check_user_conv)
+ bool DoNumericPromotions (EmitContext ec, Type l, Type r, Expression lexpr, Expression rexpr, bool check_user_conv)
{
if (IsOfType (ec, l, r, TypeManager.double_type, check_user_conv)){
//
long ll = ((LongConstant) right).Value;
if (ll >= 0)
- right = new ULongConstant ((ulong) ll);
+ right = new ULongConstant ((ulong) ll, right.Location);
} else {
- e = Convert.ImplicitNumericConversion (ec, right, l, loc);
+ e = Convert.ImplicitNumericConversion (ec, right, l);
if (e != null)
right = e;
}
long ll = ((LongConstant) left).Value;
if (ll > 0)
- left = new ULongConstant ((ulong) ll);
+ left = new ULongConstant ((ulong) ll, right.Location);
} else {
- e = Convert.ImplicitNumericConversion (ec, left, r, loc);
+ e = Convert.ImplicitNumericConversion (ec, left, r);
if (e != null)
left = e;
}
int val = ic.Value;
if (val >= 0){
- right = new UIntConstant ((uint) val);
+ right = new UIntConstant ((uint) val, ic.Location);
type = l;
return true;
int val = ic.Value;
if (val >= 0){
- left = new UIntConstant ((uint) val);
+ left = new UIntConstant ((uint) val, ic.Location);
type = r;
return true;
}
left = ForceConversion (ec, left, TypeManager.int32_type);
right = ForceConversion (ec, right, TypeManager.int32_type);
+ bool strConv =
+ Convert.ImplicitConversionExists (ec, lexpr, TypeManager.string_type) &&
+ Convert.ImplicitConversionExists (ec, rexpr, TypeManager.string_type);
+ if (strConv && left != null && right != null)
+ Error_OperatorAmbiguous (loc, oper, l, r);
+
type = TypeManager.int32_type;
}
static public void Error_OperatorCannotBeApplied (Location loc, string name, Type l, Type r)
{
- Report.Error (19, loc,
- "Operator " + name + " cannot be applied to operands of type `" +
- TypeManager.CSharpName (l) + "' and `" +
- TypeManager.CSharpName (r) + "'");
+ Error_OperatorCannotBeApplied (loc, name, TypeManager.CSharpName (l), TypeManager.CSharpName (r));
+ }
+
+ public static void Error_OperatorCannotBeApplied (Location loc, string name, string left, string right)
+ {
+ Report.Error (19, loc, "Operator `{0}' cannot be applied to operands of type `{1}' and `{2}'",
+ name, left, right);
}
void Error_OperatorCannotBeApplied ()
{
- Error_OperatorCannotBeApplied (loc, OperName (oper), left.Type, right.Type);
+ Error_OperatorCannotBeApplied (Location, OperName (oper), left.GetSignatureForError (), right.GetSignatureForError ());
}
static bool is_unsigned (Type t)
type = e.Type;
if (type == TypeManager.int32_type || type == TypeManager.uint32_type){
- right = new Binary (Binary.Operator.BitwiseAnd, right, new IntLiteral (31), loc);
+ right = new Binary (Binary.Operator.BitwiseAnd, right, new IntConstant (31, loc));
right = right.DoResolve (ec);
} else {
- right = new Binary (Binary.Operator.BitwiseAnd, right, new IntLiteral (63), loc);
+ right = new Binary (Binary.Operator.BitwiseAnd, right, new IntConstant (63, loc));
right = right.DoResolve (ec);
}
return null;
}
+ //
+ // This is used to check if a test 'x == null' can be optimized to a reference equals,
+ // i.e., not invoke op_Equality.
+ //
+ static bool EqualsNullIsReferenceEquals (Type t)
+ {
+ return t == TypeManager.object_type || t == TypeManager.string_type ||
+ t == TypeManager.delegate_type || t.IsSubclassOf (TypeManager.delegate_type);
+ }
+
+ static void Warning_UnintendedReferenceComparison (Location loc, string side, Type type)
+ {
+ Report.Warning ((side == "left" ? 252 : 253), 2, loc,
+ "Possible unintended reference comparison; to get a value comparison, " +
+ "cast the {0} hand side to type `{1}'.", side, TypeManager.CSharpName (type));
+ }
+
Expression ResolveOperator (EmitContext ec)
{
Type l = left.Type;
Type r = right.Type;
- //
- // Special cases: string comapred to null
- //
if (oper == Operator.Equality || oper == Operator.Inequality){
- if ((!TypeManager.IsValueType (l) && r == TypeManager.null_type) ||
- (!TypeManager.IsValueType (r) && l == TypeManager.null_type)) {
+ //
+ // Optimize out call to op_Equality in a few cases.
+ //
+ if ((l == TypeManager.null_type && EqualsNullIsReferenceEquals (r)) ||
+ (r == TypeManager.null_type && EqualsNullIsReferenceEquals (l))) {
+
Type = TypeManager.bool_type;
return this;
}
-
+
// IntPtr equality
if (l == TypeManager.intptr_type && r == TypeManager.intptr_type) {
Type = TypeManager.bool_type;
// Do not perform operator overload resolution when both sides are
// built-in types
//
- if (!(TypeManager.IsCLRType (l) && TypeManager.IsCLRType (r))){
+ Expression left_operators = null, right_operators = null;
+ if (!(TypeManager.IsPrimitiveType (l) && TypeManager.IsPrimitiveType (r))){
//
// Step 1: Perform Operator Overload location
//
- Expression left_expr, right_expr;
-
string op = oper_names [(int) oper];
MethodGroupExpr union;
- left_expr = MemberLookup (ec, l, op, MemberTypes.Method, AllBindingFlags, loc);
+ left_operators = MemberLookup (ec, l, op, MemberTypes.Method, AllBindingFlags, loc);
if (r != l){
- right_expr = MemberLookup (
+ right_operators = MemberLookup (
ec, r, op, MemberTypes.Method, AllBindingFlags, loc);
- union = Invocation.MakeUnionSet (left_expr, right_expr, loc);
+ union = Invocation.MakeUnionSet (left_operators, right_operators, loc);
} else
- union = (MethodGroupExpr) left_expr;
+ union = (MethodGroupExpr) left_operators;
if (union != null) {
ArrayList args = new ArrayList (2);
// Simple constant folding
if (left is StringConstant && right is StringConstant)
- return new StringConstant (((StringConstant) left).Value + ((StringConstant) right).Value);
+ return new StringConstant (((StringConstant) left).Value + ((StringConstant) right).Value, left.Location);
if (l == TypeManager.string_type || r == TypeManager.string_type) {
return this;
}
+ if (l.IsPointer || r.IsPointer) {
+ if (l.IsPointer && r.IsPointer) {
+ type = TypeManager.bool_type;
+ return this;
+ }
+
+ if (l.IsPointer && r == TypeManager.null_type) {
+ right = new EmptyCast (NullPointer.Null, l);
+ type = TypeManager.bool_type;
+ return this;
+ }
+
+ if (r.IsPointer && l == TypeManager.null_type) {
+ left = new EmptyCast (NullPointer.Null, r);
+ type = TypeManager.bool_type;
+ return this;
+ }
+ }
+
//
// operator != (object a, object b)
// operator == (object a, object b)
// For this to be used, both arguments have to be reference-types.
// Read the rationale on the spec (14.9.6)
//
- // Also, if at compile time we know that the classes do not inherit
- // one from the other, then we catch the error there.
- //
if (!(l.IsValueType || r.IsValueType)){
type = TypeManager.bool_type;
if (l == r)
return this;
- if (l.IsSubclassOf (r) || r.IsSubclassOf (l))
- return this;
-
//
// Also, a standard conversion must exist from either one
//
- if (!(Convert.ImplicitStandardConversionExists (ec, left, r) ||
- Convert.ImplicitStandardConversionExists (ec, right, l))){
+ bool left_to_right =
+ Convert.ImplicitStandardConversionExists (ec, left, r);
+ bool right_to_left = !left_to_right &&
+ Convert.ImplicitStandardConversionExists (ec, right, l);
+
+ if (!left_to_right && !right_to_left) {
Error_OperatorCannotBeApplied ();
return null;
}
+
+ if (left_to_right && left_operators != null &&
+ RootContext.WarningLevel >= 2) {
+ ArrayList args = new ArrayList (2);
+ args.Add (new Argument (left, Argument.AType.Expression));
+ args.Add (new Argument (left, Argument.AType.Expression));
+ MethodBase method = Invocation.OverloadResolve (
+ ec, (MethodGroupExpr) left_operators, args, true, Location.Null);
+ if (method != null)
+ Warning_UnintendedReferenceComparison (loc, "right", l);
+ }
+
+ if (right_to_left && right_operators != null &&
+ RootContext.WarningLevel >= 2) {
+ ArrayList args = new ArrayList (2);
+ args.Add (new Argument (right, Argument.AType.Expression));
+ args.Add (new Argument (right, Argument.AType.Expression));
+ MethodBase method = Invocation.OverloadResolve (
+ ec, (MethodGroupExpr) right_operators, args, true, Location.Null);
+ if (method != null)
+ Warning_UnintendedReferenceComparison (loc, "left", r);
+ }
+
//
// We are going to have to convert to an object to compare
//
if (oper == Operator.BitwiseAnd ||
oper == Operator.BitwiseOr ||
oper == Operator.ExclusiveOr){
+ if (left.Type != right.Type){
+ Error_OperatorCannotBeApplied ();
+ return null;
+ }
type = l;
return this;
}
// Pointer comparison
//
if (l.IsPointer && r.IsPointer){
- if (oper == Operator.Equality || oper == Operator.Inequality ||
- oper == Operator.LessThan || oper == Operator.LessThanOrEqual ||
+ if (oper == Operator.LessThan || oper == Operator.LessThanOrEqual ||
oper == Operator.GreaterThan || oper == Operator.GreaterThanOrEqual){
type = TypeManager.bool_type;
return this;
// This will leave left or right set to null if there is an error
//
bool check_user_conv = is_user_defined (l) && is_user_defined (r);
- DoNumericPromotions (ec, l, r, check_user_conv);
+ DoNumericPromotions (ec, l, r, left, right, check_user_conv);
if (left == null || right == null){
Error_OperatorCannotBeApplied (loc, OperName (oper), l, r);
return null;
return this;
}
+ Constant EnumLiftUp (EmitContext ec, Constant left, Constant right)
+ {
+ switch (oper) {
+ case Operator.BitwiseOr:
+ case Operator.BitwiseAnd:
+ case Operator.ExclusiveOr:
+ case Operator.Equality:
+ case Operator.Inequality:
+ case Operator.LessThan:
+ case Operator.LessThanOrEqual:
+ case Operator.GreaterThan:
+ case Operator.GreaterThanOrEqual:
+ if (left is EnumConstant)
+ return left;
+
+ if (left.IsZeroInteger)
+ return new EnumConstant (left, right.Type);
+
+ break;
+
+ case Operator.Addition:
+ case Operator.Subtraction:
+ return left;
+
+ case Operator.Multiply:
+ case Operator.Division:
+ case Operator.Modulus:
+ case Operator.LeftShift:
+ case Operator.RightShift:
+ if (right is EnumConstant || left is EnumConstant)
+ break;
+ return left;
+ }
+ Error_OperatorCannotBeApplied (loc, Binary.OperName (oper), left.Type, right.Type);
+ return null;
+ }
+
public override Expression DoResolve (EmitContext ec)
{
if ((oper == Operator.Subtraction) && (left is ParenthesizedExpression)) {
return null;
if (left.eclass == ExprClass.Type) {
- Error (75, "Casting a negative value needs to have the value in parentheses.");
+ Report.Error (75, loc, "To cast a negative value, you must enclose the value in parentheses");
return null;
}
} else
return null;
eclass = ExprClass.Value;
-
Constant rc = right as Constant;
- if (rc != null & lc != null){
+
+ // The conversion rules are ignored in enum context but why
+ if (!ec.InEnumContext && lc != null && rc != null && (TypeManager.IsEnumType (left.Type) || TypeManager.IsEnumType (right.Type))) {
+ left = lc = EnumLiftUp (ec, lc, rc);
+ if (lc == null)
+ return null;
+
+ right = rc = EnumLiftUp (ec, rc, lc);
+ if (rc == null)
+ return null;
+ }
+
+ if (oper == Operator.BitwiseAnd) {
+ if (rc != null && rc.IsZeroInteger) {
+ return lc is EnumConstant ?
+ new EnumConstant (rc, lc.Type):
+ rc;
+ }
+
+ if (lc != null && lc.IsZeroInteger) {
+ return rc is EnumConstant ?
+ new EnumConstant (lc, rc.Type):
+ lc;
+ }
+ }
+ else if (oper == Operator.BitwiseOr) {
+ if (lc is EnumConstant &&
+ rc != null && rc.IsZeroInteger)
+ return lc;
+ if (rc is EnumConstant &&
+ lc != null && lc.IsZeroInteger)
+ return rc;
+ }
+
+ if (rc != null && lc != null){
+ int prev_e = Report.Errors;
Expression e = ConstantFold.BinaryFold (
ec, oper, lc, rc, loc);
- if (e != null)
- return e;
+ if (e != null || Report.Errors != prev_e)
+ return e;
+ }
+
+ // Comparison warnings
+ if (oper == Operator.Equality || oper == Operator.Inequality ||
+ oper == Operator.LessThanOrEqual || oper == Operator.LessThan ||
+ oper == Operator.GreaterThanOrEqual || oper == Operator.GreaterThan){
+ if (left.Equals (right)) {
+ Report.Warning (1718, 3, loc, "Comparison made to same variable; did you mean to compare something else?");
+ }
+ CheckUselessComparison (lc, right.Type);
+ CheckUselessComparison (rc, left.Type);
}
return ResolveOperator (ec);
}
+ private void CheckUselessComparison (Constant c, Type type)
+ {
+ if (c == null || !IsTypeIntegral (type)
+ || c is StringConstant
+ || c is BoolConstant
+ || c is CharConstant
+ || c is FloatConstant
+ || c is DoubleConstant
+ || c is DecimalConstant
+ )
+ return;
+
+ long value = 0;
+
+ if (c is ULongConstant) {
+ ulong uvalue = ((ULongConstant) c).Value;
+ if (uvalue > long.MaxValue) {
+ if (type == TypeManager.byte_type ||
+ type == TypeManager.sbyte_type ||
+ type == TypeManager.short_type ||
+ type == TypeManager.ushort_type ||
+ type == TypeManager.int32_type ||
+ type == TypeManager.uint32_type ||
+ type == TypeManager.int64_type)
+ WarnUselessComparison (type);
+ return;
+ }
+ value = (long) uvalue;
+ }
+ else if (c is ByteConstant)
+ value = ((ByteConstant) c).Value;
+ else if (c is SByteConstant)
+ value = ((SByteConstant) c).Value;
+ else if (c is ShortConstant)
+ value = ((ShortConstant) c).Value;
+ else if (c is UShortConstant)
+ value = ((UShortConstant) c).Value;
+ else if (c is IntConstant)
+ value = ((IntConstant) c).Value;
+ else if (c is UIntConstant)
+ value = ((UIntConstant) c).Value;
+ else if (c is LongConstant)
+ value = ((LongConstant) c).Value;
+
+ if (value != 0) {
+ if (IsValueOutOfRange (value, type))
+ WarnUselessComparison (type);
+ return;
+ }
+ }
+
+ private bool IsValueOutOfRange (long value, Type type)
+ {
+ if (IsTypeUnsigned (type) && value < 0)
+ return true;
+ return type == TypeManager.sbyte_type && (value >= 0x80 || value < -0x80) ||
+ type == TypeManager.byte_type && value >= 0x100 ||
+ type == TypeManager.short_type && (value >= 0x8000 || value < -0x8000) ||
+ type == TypeManager.ushort_type && value >= 0x10000 ||
+ type == TypeManager.int32_type && (value >= 0x80000000 || value < -0x80000000) ||
+ type == TypeManager.uint32_type && value >= 0x100000000;
+ }
+
+ private static bool IsTypeIntegral (Type type)
+ {
+ return type == TypeManager.uint64_type ||
+ type == TypeManager.int64_type ||
+ type == TypeManager.uint32_type ||
+ type == TypeManager.int32_type ||
+ type == TypeManager.ushort_type ||
+ type == TypeManager.short_type ||
+ type == TypeManager.sbyte_type ||
+ type == TypeManager.byte_type;
+ }
+
+ private static bool IsTypeUnsigned (Type type)
+ {
+ return type == TypeManager.uint64_type ||
+ type == TypeManager.uint32_type ||
+ type == TypeManager.ushort_type ||
+ type == TypeManager.byte_type;
+ }
+
+ private void WarnUselessComparison (Type type)
+ {
+ Report.Warning (652, 2, loc, "Comparison to integral constant is useless; the constant is outside the range of type `{0}'",
+ TypeManager.CSharpName (type));
+ }
+
/// <remarks>
/// EmitBranchable is called from Statement.EmitBoolExpression in the
/// context of a conditional bool expression. This function will return
if (operand is StringConstant && operands.Count != 0) {
StringConstant last_operand = operands [operands.Count - 1] as StringConstant;
if (last_operand != null) {
- operands [operands.Count - 1] = new StringConstant (last_operand.Value + ((StringConstant) operand).Value);
+ operands [operands.Count - 1] = new StringConstant (last_operand.Value + ((StringConstant) operand).Value, last_operand.Location);
return;
}
}
protected void Error19 ()
{
- Binary.Error_OperatorCannotBeApplied (loc, is_and ? "&&" : "||", type, type);
+ Binary.Error_OperatorCannotBeApplied (loc, is_and ? "&&" : "||", left.GetSignatureForError (), right.GetSignatureForError ());
}
protected void Error218 ()
}
if (method.ReturnType != type) {
- Report.Error (217, loc, "In order to be applicable as a short circuit operator a user-defined logical operator ('{0}') " +
+ Report.Error (217, loc, "In order to be applicable as a short circuit operator a user-defined logical operator `{0}' " +
"must have the same return type as the type of its 2 parameters", TypeManager.CSharpSignature (method));
return null;
}
Constant right_const = right as Constant;
if (right_const != null && size != 0) {
- Expression ex = ConstantFold.BinaryFold (ec, Binary.Operator.Multiply, new IntConstant (size), right_const, loc);
+ Expression ex = ConstantFold.BinaryFold (ec, Binary.Operator.Multiply, new IntConstant (size, right.Location), right_const, loc);
if (ex == null)
return;
ex.Emit (ec);
public class Conditional : Expression {
Expression expr, trueExpr, falseExpr;
- public Conditional (Expression expr, Expression trueExpr, Expression falseExpr, Location l)
+ public Conditional (Expression expr, Expression trueExpr, Expression falseExpr)
{
this.expr = expr;
this.trueExpr = trueExpr;
this.falseExpr = falseExpr;
- this.loc = l;
+ this.loc = expr.Location;
}
public Expression Expr {
return null;
}
+ Assign ass = expr as Assign;
+ if (ass != null && ass.Source is Constant) {
+ Report.Warning (665, 3, loc, "Assignment in conditional expression is always constant; did you mean to use == instead of = ?");
+ }
+
trueExpr = trueExpr.Resolve (ec);
falseExpr = falseExpr.Resolve (ec);
type = true_type;
falseExpr = conv;
} else {
- Error (173, "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) + "'");
+ Report.Error (173, loc, "Type of conditional expression cannot be determined because there is no implicit conversion between `{0}' and `{1}'",
+ trueExpr.GetSignatureForError (), falseExpr.GetSignatureForError ());
return null;
}
}
}
}
+ public bool VerifyAssigned (EmitContext ec)
+ {
+ VariableInfo variable_info = local_info.VariableInfo;
+ return variable_info == null || variable_info.IsAssigned (ec, loc);
+ }
+
protected Expression DoResolveBase (EmitContext ec, Expression lvalue_right_side)
{
if (local_info == null) {
VariableInfo variable_info = local_info.VariableInfo;
if (lvalue_right_side != null){
if (is_readonly){
- Error (1604, "cannot assign to `" + Name + "' because it is readonly");
+ if (lvalue_right_side is LocalVariableReference || lvalue_right_side == EmptyExpression.Null)
+ Report.Error (1657, loc, "Cannot pass `{0}' as a ref or out argument because it is a `{1}'",
+ Name, local_info.GetReadOnlyContext ());
+ else
+ Report.Error (1656, loc, "Cannot assign to `{0}' because it is a `{1}'",
+ Name, local_info.GetReadOnlyContext ());
return null;
}
return e.Resolve (ec);
}
- if ((variable_info != null) && !variable_info.IsAssigned (ec, loc))
+ if (!VerifyAssigned (ec))
return null;
if (lvalue_right_side == null)
// If we are referencing a variable from the external block
// flag it for capturing
//
- if (local_info.Block.Toplevel != ec.CurrentBlock.Toplevel){
+ if ((local_info.Block.Toplevel != ec.CurrentBlock.Toplevel) ||
+ ec.CurrentAnonymousMethod.IsIterator)
+ {
if (local_info.AddressTaken){
AnonymousMethod.Error_AddressOfCapturedVar (local_info.Name, loc);
return null;
override public Expression DoResolveLValue (EmitContext ec, Expression right_side)
{
- Expression ret = DoResolveBase (ec, right_side);
- if (ret != null)
- CheckObsoleteAttribute (ret.Type);
-
- return ret;
+ return DoResolveBase (ec, right_side);
}
- public bool VerifyFixed (bool is_expression)
+ public bool VerifyFixed ()
{
- return !is_expression || local_info.IsFixed;
+ // A local Variable is always fixed.
+ return true;
}
public override int GetHashCode()
//
if (local_info.LocalBuilder == null)
throw new Exception ("This should not happen: both Field and Local are null");
-
+
source.Emit (ec);
if (leave_copy)
ec.ig.Emit (OpCodes.Dup);
eclass = ExprClass.Variable;
}
+ public ParameterReference (InternalParameters pars, Block block, int idx, Location loc)
+ : this (pars.Parameters, block, idx, pars.ParameterName (idx), loc)
+ { }
+
public VariableInfo VariableInfo {
get { return vi; }
}
- public bool VerifyFixed (bool is_expression)
+ public bool VerifyFixed ()
{
- return !is_expression || TypeManager.IsValueType (type);
+ // A parameter is fixed if it's a value parameter (i.e., no modifier like out, ref, param).
+ return mod == Parameter.Modifier.NONE;
}
public bool IsAssigned (EmitContext ec, Location loc)
return true;
Report.Error (269, loc,
- "Use of unassigned out parameter '{0}'", name);
+ "Use of unassigned out parameter `{0}'", name);
return false;
}
if (ec.CurrentAnonymousMethod != null){
if (is_ref){
- Report.Error (1628, Location,
- "Can not reference a ref or out parameter in an anonymous method");
+ Report.Error (1628, Location, "Cannot use ref or out parameter `{0}' inside an anonymous method block",
+ name);
return;
}
-
+
//
// If we are referencing the parameter from the external block
// flag it for capturing
//
//Console.WriteLine ("Is parameter `{0}' local? {1}", name, block.IsLocalParameter (name));
- if (!block.IsLocalParameter (name)){
+ if (!block.Toplevel.IsLocalParameter (name)){
ec.CaptureParameter (name, type, idx);
}
}
{
DoResolveBase (ec);
- if (is_out && ec.DoFlowAnalysis && !IsAssigned (ec, loc))
+ if (is_out && ec.DoFlowAnalysis && (!ec.OmitStructFlowAnalysis || !vi.TypeInfo.IsStruct) && !IsAssigned (ec, loc))
return null;
- if (ec.RemapToProxy)
- return ec.RemapParameter (idx);
-
return this;
}
SetAssigned (ec);
- if (ec.RemapToProxy)
- return ec.RemapParameterLValue (idx, right_side);
-
return this;
}
if (!ec.MethodIsStatic)
arg_idx++;
-
EmitLdArg (ig, arg_idx);
//
public override void Emit (EmitContext ec)
{
- if (ec.HaveCaptureInfo && ec.IsParameterCaptured (name)){
- ec.EmitParameter (name);
- return;
- }
-
Emit (ec, false);
}
ILGenerator ig = ec.ig;
int arg_idx = idx;
+ if (ec.HaveCaptureInfo && ec.IsParameterCaptured (name)){
+ if (leave_copy)
+ throw new InternalErrorException ();
+
+ ec.EmitParameter (name);
+ return;
+ }
+
if (!ec.MethodIsStatic)
arg_idx++;
}
}
- public Parameter.Modifier GetParameterModifier ()
+ public Parameter.Modifier Modifier
{
- switch (ArgType) {
- case AType.Out:
- return Parameter.Modifier.OUT | Parameter.Modifier.ISBYREF;
+ get {
+ switch (ArgType) {
+ case AType.Out:
+ return Parameter.Modifier.OUT | Parameter.Modifier.ISBYREF;
- case AType.Ref:
- return Parameter.Modifier.REF | Parameter.Modifier.ISBYREF;
+ case AType.Ref:
+ return Parameter.Modifier.REF | Parameter.Modifier.ISBYREF;
- default:
- return Parameter.Modifier.NONE;
+ default:
+ return Parameter.Modifier.NONE;
+ }
}
}
void Error_LValueRequired (Location loc)
{
- Report.Error (1510, loc, "An lvalue is required as an argument to out or ref");
+ Report.Error (1510, loc, "A ref or out argument must be an assignable variable");
}
public bool Resolve (EmitContext ec, Location loc)
{
+ bool old_do_flow_analysis = ec.DoFlowAnalysis;
+ ec.DoFlowAnalysis = true;
+
if (ArgType == AType.Ref) {
+ ec.InRefOutArgumentResolving = true;
Expr = Expr.Resolve (ec);
- if (Expr == null)
+ ec.InRefOutArgumentResolving = false;
+ if (Expr == null) {
+ ec.DoFlowAnalysis = old_do_flow_analysis;
return false;
-
- if (!ec.IsConstructor) {
- FieldExpr fe = Expr as FieldExpr;
- if (fe != null && fe.FieldInfo.IsInitOnly) {
- if (fe.FieldInfo.IsStatic)
- Report.Error (199, loc, "A static readonly field cannot be passed ref or out (except in a static constructor)");
- else
- Report.Error (192, loc, "A readonly field cannot be passed ref or out (except in a constructor)");
- return false;
- }
}
+
Expr = Expr.DoResolveLValue (ec, Expr);
if (Expr == null)
Error_LValueRequired (loc);
} else if (ArgType == AType.Out) {
+ ec.InRefOutArgumentResolving = true;
Expr = Expr.DoResolveLValue (ec, EmptyExpression.Null);
+ ec.InRefOutArgumentResolving = false;
+
if (Expr == null)
Error_LValueRequired (loc);
}
else
Expr = Expr.Resolve (ec);
+ ec.DoFlowAnalysis = old_do_flow_analysis;
+
if (Expr == null)
return false;
if (instance.GetType () != typeof (This)){
if (fe.InstanceExpression.Type.IsSubclassOf (TypeManager.mbr_type)){
Report.SymbolRelatedToPreviousError (fe.InstanceExpression.Type);
- Report.Error (197, loc, "Cannot pass '{0}' as ref or out or take its address because it is a member of a marshal-by-reference class",
- fe.Name);
+ Report.Warning (197, 1, loc,
+ "Passing `{0}' as ref or out or taking its address may cause a runtime exception because it is a field of a marshal-by-reference class",
+ fe.GetSignatureForError ());
return false;
}
}
//
if (Expr.eclass == ExprClass.PropertyAccess ||
Expr.eclass == ExprClass.IndexerAccess){
- Report.Error (
- 206, loc,
- "A property or indexer can not be passed as an out or ref " +
- "parameter");
+ Report.Error (206, loc, "A property or indexer `{0}' may not be passed as an out or ref parameter",
+ Expr.GetSignatureForError ());
} else {
Error_LValueRequired (loc);
}
if (Expr is IMemoryLocation)
((IMemoryLocation) Expr).AddressOf (ec, mode);
else {
- Report.Error (
- 1510, Expr.Location,
- "An lvalue is required as an argument to out or ref");
+ Error_LValueRequired (Expr.Location);
return;
}
}
// FIXME: only allow expr to be a method invocation or a
// delegate invocation (7.5.5)
//
- public Invocation (Expression expr, ArrayList arguments, Location l)
+ public Invocation (Expression expr, ArrayList arguments)
{
this.expr = expr;
Arguments = arguments;
- loc = l;
+ loc = expr.Location;
}
public Expression Expr {
}
/// <summary>
- /// Determines "better conversion" as specified in 7.4.2.3
+ /// Determines "better conversion" as specified in 14.4.2.3
///
/// Returns : p if a->p is better,
/// q if a->q is better,
public static string FullMethodDesc (MethodBase mb)
{
- string ret_type = "";
-
- if (mb == null)
- return "";
+ if (mb == null)
+ return "";
- if (mb is MethodInfo)
- ret_type = TypeManager.CSharpName (((MethodInfo) mb).ReturnType);
-
- StringBuilder sb = new StringBuilder (ret_type);
- sb.Append (" ");
- sb.Append (mb.ReflectedType.ToString ());
- sb.Append (".");
- sb.Append (mb.Name);
-
- ParameterData pd = TypeManager.GetParameterData (mb);
-
- int count = pd.Count;
- sb.Append (" (");
-
- for (int i = count; i > 0; ) {
- i--;
-
- sb.Append (pd.ParameterDesc (count - i - 1));
- if (i != 0)
- sb.Append (", ");
+ StringBuilder sb;
+ if (mb is MethodInfo) {
+ sb = new StringBuilder (TypeManager.CSharpName (((MethodInfo) mb).ReturnType));
+ sb.Append (" ");
}
-
- sb.Append (")");
+ else
+ sb = new StringBuilder ();
+
+ sb.Append (TypeManager.CSharpSignature (mb));
return sb.ToString ();
}
Argument a = (Argument) arguments [i];
- Parameter.Modifier a_mod = a.GetParameterModifier () &
+ Parameter.Modifier a_mod = a.Modifier &
(unchecked (~(Parameter.Modifier.OUT | Parameter.Modifier.REF)));
Parameter.Modifier p_mod = pd.ParameterModifier (i) &
(unchecked (~(Parameter.Modifier.OUT | Parameter.Modifier.REF)));
Argument a = (Argument) arguments [i];
- Parameter.Modifier a_mod = a.GetParameterModifier () &
+ Parameter.Modifier a_mod = a.Modifier &
unchecked (~(Parameter.Modifier.OUT | Parameter.Modifier.REF));
Parameter.Modifier p_mod = pd.ParameterModifier (i) &
unchecked (~(Parameter.Modifier.OUT | Parameter.Modifier.REF));
-
if (a_mod == p_mod ||
(a_mod == Parameter.Modifier.NONE && p_mod == Parameter.Modifier.PARAMS)) {
if (a_mod == Parameter.Modifier.NONE) {
if (Arguments != null)
arg_count = Arguments.Count;
- if ((me.Name == "Invoke") &&
- TypeManager.IsDelegateType (me.DeclaringType)) {
- Error_InvokeOnDelegate (loc);
- return null;
- }
+ if ((me.Name == "Invoke") &&
+ TypeManager.IsDelegateType (me.DeclaringType)) {
+ Error_InvokeOnDelegate (loc);
+ return null;
+ }
MethodBase[] methods = me.Methods;
- //
- // First we construct the set of applicable methods
- //
+ //
+ // First we construct the set of applicable methods
+ //
bool is_sorted = true;
for (int i = 0; i < methods.Length; i++){
- Type decl_type = methods [i].DeclaringType;
-
- //
- // If we have already found an applicable method
- // we eliminate all base types (Section 14.5.5.1)
- //
- if ((applicable_type != null) &&
- IsAncestralType (decl_type, applicable_type))
+ Type decl_type = methods [i].DeclaringType;
+
+ //
+ // If we have already found an applicable method
+ // we eliminate all base types (Section 14.5.5.1)
+ //
+ if ((applicable_type != null) &&
+ IsAncestralType (decl_type, applicable_type))
continue;
//
// We avoid doing the 'applicable' test here, since it'll anyway be applied
// to the base virtual function, and IsOverride is much faster than IsApplicable.
//
- if (!me.IsBase &&
- methods [i].IsVirtual &&
- (methods [i].Attributes & MethodAttributes.NewSlot) == 0) {
+ if (!me.IsBase && TypeManager.IsOverride (methods [i])) {
if (candidate_overrides == null)
candidate_overrides = new ArrayList ();
candidate_overrides.Add (methods [i]);
ec, me, Arguments, arg_count, ref methods [i]);
if (!is_applicable &&
- (IsParamsMethodApplicable (
- ec, me, Arguments, arg_count, ref methods [i]))) {
+ (IsParamsMethodApplicable (
+ ec, me, Arguments, arg_count, ref methods [i]))) {
MethodBase candidate = methods [i];
if (candidate_to_form == null)
candidate_to_form = new PtrHashtable ();
// Okay so we have failed to find anything so we
// return by providing info about the closest match
//
+ int errors = Report.Errors;
for (int i = 0; i < methods.Length; ++i) {
MethodBase c = (MethodBase) methods [i];
ParameterData pd = TypeManager.GetParameterData (c);
continue;
VerifyArgumentsCompat (ec, Arguments, arg_count,
- c, false, null, may_fail, loc);
+ c, false, null, may_fail, loc);
+
+ if (!may_fail && errors == Report.Errors)
+ throw new InternalErrorException (
+ "VerifyArgumentsCompat and IsApplicable do not agree; " +
+ "likely reason: ImplicitConversion and ImplicitConversionExists have gone out of sync");
+
break;
}
- if (!may_fail) {
- string report_name = me.Name;
- if (report_name == ".ctor")
- report_name = me.DeclaringType.ToString ();
-
- Error_WrongNumArguments (
- loc, report_name, arg_count);
- return null;
- }
+ if (!may_fail && errors == Report.Errors) {
+ string report_name = me.Name;
+ if (report_name == ".ctor")
+ report_name = me.DeclaringType.ToString ();
+ Error_WrongNumArguments (loc, report_name, arg_count);
+ }
return null;
}
method_params = cand_params;
}
}
-
//
// Now check that there are no ambiguities i.e the selected method
// should be better than all the others
//
- bool ambiguous = false;
+ MethodBase ambiguous = null;
for (int ix = 0; ix < candidate_top; ix++){
MethodBase candidate = (MethodBase) candidates [ix];
candidate, cand_params,
loc)) {
Report.SymbolRelatedToPreviousError (candidate);
- ambiguous = true;
+ ambiguous = candidate;
}
}
- if (ambiguous) {
+ if (ambiguous != null) {
Report.SymbolRelatedToPreviousError (method);
- Report.Error (121, loc, "Ambiguous call when selecting function due to implicit casts");
+ Report.Error (121, loc, "The call is ambiguous between the following methods or properties: `{0}' and `{1}'",
+ TypeManager.CSharpSignature (ambiguous), TypeManager.CSharpSignature (method));
return null;
}
// If the method is a virtual function, pick an override closer to the LHS type.
//
if (!me.IsBase && method.IsVirtual) {
- if ((method.Attributes & MethodAttributes.NewSlot) != MethodAttributes.NewSlot)
+ if (TypeManager.IsOverride (method))
throw new InternalErrorException (
"Should not happen. An 'override' method took part in overload resolution: " + method);
-
+
if (candidate_overrides != null)
foreach (MethodBase candidate in candidate_overrides) {
if (IsOverride (candidate, method))
method_params, null, may_fail, loc))
return null;
+ if (method != null) {
+ IMethodData data = TypeManager.GetMethod (method);
+ if (data != null)
+ data.SetMemberIsUsed ();
+ }
return method;
}
- static void Error_WrongNumArguments (Location loc, String name, int arg_count)
+ public static void Error_WrongNumArguments (Location loc, String name, int arg_count)
{
- if (name == "Finalize" && arg_count == 0) {
- Report.Error (245, loc, "Destructors and object.Finalize cannot be called directly. Consider calling IDisposable.Dispose if available");
- }
- else {
- Report.Error (1501, loc,
- "No overload for method `" + name + "' takes `" +
- arg_count + "' arguments");
- }
+ Report.Error (1501, loc, "No overload for method `{0}' takes `{1}' arguments",
+ name, arg_count);
}
static void Error_InvokeOnDelegate (Location loc)
}
static void Error_InvalidArguments (Location loc, int idx, MethodBase method,
- Type delegate_type, string arg_sig, string par_desc)
+ Type delegate_type, Argument a, ParameterData expected_par)
{
if (delegate_type == null)
- Report.Error (1502, loc,
- "The best overloaded match for method '" +
- FullMethodDesc (method) +
- "' has some invalid arguments");
+ Report.Error (1502, loc, "The best overloaded method match for `{0}' has some invalid arguments",
+ TypeManager.CSharpSignature (method));
else
- Report.Error (1594, loc,
- "Delegate '" + delegate_type.ToString () +
- "' has some invalid arguments.");
- Report.Error (1503, loc,
- String.Format ("Argument {0}: Cannot convert from '{1}' to '{2}'",
- idx, arg_sig, par_desc));
+ Report.Error (1594, loc, "Delegate `{0}' has some invalid arguments",
+ TypeManager.CSharpName (delegate_type));
+
+ Parameter.Modifier mod = expected_par.ParameterModifier (idx);
+
+ if (mod != Parameter.Modifier.ARGLIST && mod != a.Modifier) {
+ if ((mod & (Parameter.Modifier.REF | Parameter.Modifier.OUT)) == 0)
+ Report.Error (1615, loc, "Argument `{0}' should not be passed with the `{1}' keyword",
+ idx + 1, Parameter.GetModifierSignature (a.Modifier));
+ else
+ Report.Error (1620, loc, "Argument `{0}' must be passed with the `{1}' keyword",
+ idx + 1, Parameter.GetModifierSignature (mod));
+ } else {
+ Report.Error (1503, loc, "Argument {0}: Cannot convert from `{1}' to `{2}'",
+ idx + 1, Argument.FullDesc (a), expected_par.ParameterDesc (idx));
+ }
}
public static bool VerifyArgumentsCompat (EmitContext ec, ArrayList Arguments,
Parameter.Modifier pm = pd.ParameterModifier (j);
if (pm == Parameter.Modifier.PARAMS){
- if ((pm & ~Parameter.Modifier.PARAMS) != a.GetParameterModifier ()) {
+ if ((pm & ~Parameter.Modifier.PARAMS) != a.Modifier) {
if (!may_fail)
- Error_InvalidArguments (
- loc, j, method, delegate_type,
- Argument.FullDesc (a), pd.ParameterDesc (j));
+ Error_InvalidArguments (loc, j, method, delegate_type, a, pd);
return false;
}
if (chose_params_expanded)
parameter_type = TypeManager.GetElementType (parameter_type);
- } else if (pm == Parameter.Modifier.ARGLIST){
+ } else if (pm == Parameter.Modifier.ARGLIST) {
+ if (!(a.Expr is Arglist)) {
+ if (!may_fail)
+ Error_InvalidArguments (loc, j, method, delegate_type, a, pd);
+ return false;
+ }
continue;
} else {
//
// Check modifiers
//
- if (pd.ParameterModifier (j) != a.GetParameterModifier ()){
+ if (pd.ParameterModifier (j) != a.Modifier){
if (!may_fail)
- Error_InvalidArguments (
- loc, j, method, delegate_type,
- Argument.FullDesc (a), pd.ParameterDesc (j));
+ Error_InvalidArguments (loc, j, method, delegate_type, a, pd);
return false;
}
}
if (conv == null) {
if (!may_fail)
- Error_InvalidArguments (
- loc, j, method, delegate_type,
- Argument.FullDesc (a), pd.ParameterDesc (j));
+ Error_InvalidArguments (loc, j, method, delegate_type, a, pd);
return false;
}
}
}
- Parameter.Modifier a_mod = a.GetParameterModifier () &
+ Parameter.Modifier a_mod = a.Modifier &
unchecked (~(Parameter.Modifier.OUT | Parameter.Modifier.REF));
Parameter.Modifier p_mod = pd.ParameterModifier (j) &
unchecked (~(Parameter.Modifier.OUT | Parameter.Modifier.REF));
if (a_mod != p_mod &&
pd.ParameterModifier (pd_count - 1) != Parameter.Modifier.PARAMS) {
if (!may_fail) {
- Report.Error (1502, loc,
- "The best overloaded match for method '" + FullMethodDesc (method)+
- "' has some invalid arguments");
- Report.Error (1503, loc,
- "Argument " + (j+1) +
- ": Cannot convert from '" + Argument.FullDesc (a)
- + "' to '" + pd.ParameterDesc (j) + "'");
+ Invocation.Error_InvalidArguments (loc, j, method, null, a, pd);
}
return false;
mg.IdenticalTypeName) {
mg.InstanceExpression = null;
} else {
- MemberExpr.error176 (loc, mi.Name);
+ MemberExpr.error176 (loc, TypeManager.CSharpSignature (mi));
return null;
}
} else {
if (iexpr == null || iexpr is EmptyExpression) {
- SimpleName.Error_ObjectRefRequired (ec, loc, mi.Name);
+ SimpleName.Error_ObjectRefRequired (ec, loc, TypeManager.CSharpSignature (mi));
return null;
}
}
// Only base will allow this invocation to happen.
//
if (mg.IsBase && method.IsAbstract){
- Report.Error (205, loc, "Cannot call an abstract base member: " +
- FullMethodDesc (method));
+ Error_CannotCallAbstractBase (TypeManager.CSharpSignature (method));
return null;
}
- if (method.Name == "Finalize" && Arguments == null) {
- Report.Error (250, loc, "Do not directly call your base class Finalize method. It is called automatically from your destructor");
+ if (Arguments == null && method.Name == "Finalize") {
+ if (mg.IsBase)
+ Report.Error (250, loc, "Do not directly call your base class Finalize method. It is called automatically from your destructor");
+ else
+ Report.Error (245, loc, "Destructors and object.Finalize cannot be called directly. Consider calling IDisposable.Dispose if available");
return null;
}
- if ((method.Attributes & MethodAttributes.SpecialName) != 0) {
- if (TypeManager.LookupDeclSpace (method.DeclaringType) != null || TypeManager.IsSpecialMethod (method)) {
- Report.Error (571, loc, TypeManager.CSharpSignature (method) + ": can not call operator or accessor");
- return null;
- }
+ if ((method.Attributes & MethodAttributes.SpecialName) != 0 && IsSpecialMethodInvocation (method)) {
+ return null;
}
if (mg.InstanceExpression != null)
return this;
}
+ bool IsSpecialMethodInvocation (MethodBase method)
+ {
+ IMethodData md = TypeManager.GetMethod (method);
+ if (md != null) {
+ if (!(md is AbstractPropertyEventMethod) && !(md is Operator))
+ return false;
+ } else {
+ if (!TypeManager.IsSpecialMethod (method))
+ return false;
+
+ int args = TypeManager.GetParameterData (method).Count;
+ if (method.Name.StartsWith ("get_") && args > 0)
+ return false;
+ else if (method.Name.StartsWith ("set_") && args > 2)
+ return false;
+
+ // TODO: check operators and events as well ?
+ }
+
+ Report.SymbolRelatedToPreviousError (method);
+ Report.Error (571, loc, "`{0}': cannot explicitly call operator or accessor",
+ TypeManager.CSharpSignature (method, true));
+
+ return true;
+ }
+
// <summary>
// Emits the list of arguments as an array
// </summary>
/// </summary>
public static void EmitArguments (EmitContext ec, MethodBase mb, ArrayList arguments, bool dup_args, LocalTemporary this_arg)
{
- ParameterData pd;
- if (mb != null)
- pd = TypeManager.GetParameterData (mb);
- else
- pd = null;
-
+ ParameterData pd = mb == null ? null : TypeManager.GetParameterData (mb);
+ int top = arguments == null ? 0 : arguments.Count;
LocalTemporary [] temps = null;
- if (dup_args)
- temps = new LocalTemporary [arguments.Count];
-
- //
- // If we are calling a params method with no arguments, special case it
- //
- if (arguments == null){
- if (pd != null && pd.Count > 0 &&
- pd.ParameterModifier (0) == Parameter.Modifier.PARAMS){
- ILGenerator ig = ec.ig;
-
- IntConstant.EmitInt (ig, 0);
- ig.Emit (OpCodes.Newarr, TypeManager.GetElementType (pd.ParameterType (0)));
- }
-
- return;
- }
-
- int top = arguments.Count;
+ if (dup_args && top != 0)
+ temps = new LocalTemporary [top];
for (int i = 0; i < top; i++){
Argument a = (Argument) arguments [i];
}
if (IsMethodExcluded (method, ec))
- return;
+ return;
if (!is_static){
- this_call = instance_expr == null;
+ if (instance_expr == EmptyExpression.Null) {
+ SimpleName.Error_ObjectRefRequired (ec, loc, TypeManager.CSharpSignature (method));
+ return;
+ }
+
+ this_call = instance_expr is This;
if (decl_type.IsValueType || (!this_call && instance_expr.Type.IsValueType))
struct_call = true;
- //
- // If this is ourselves, push "this"
- //
if (!omit_args) {
- Type t = null;
- if (this_call) {
- ig.Emit (OpCodes.Ldarg_0);
- t = decl_type;
- } else {
+ Type t = null;
//
// Push the instance expression
//
instance_expr.Emit (ec);
t = instance_expr.Type;
}
- }
-
- if (dup_args) {
- this_arg = new LocalTemporary (ec, t);
- ig.Emit (OpCodes.Dup);
- this_arg.Store (ec);
- }
+
+ if (dup_args) {
+ ig.Emit (OpCodes.Dup);
+ if (Arguments != null && Arguments.Count != 0) {
+ this_arg = new LocalTemporary (ec, t);
+ this_arg.Store (ec);
+ }
+ }
}
}
Expression expr;
Expression argument;
- public InvocationOrCast (Expression expr, Expression argument, Location loc)
+ public InvocationOrCast (Expression expr, Expression argument)
{
this.expr = expr;
this.argument = argument;
- this.loc = loc;
+ this.loc = expr.Location;
}
public override Expression DoResolve (EmitContext ec)
value_target = value;
value_target_set = true;
if (!(value_target is IMemoryLocation)){
- Error_UnexpectedKind ("variable", loc);
+ Error_UnexpectedKind (null, "variable", loc);
return false;
}
return true;
/// <summary>
/// Converts complex core type syntax like 'new int ()' to simple constant
/// </summary>
- Expression Constantify (Type t)
+ public static Constant Constantify (Type t)
{
if (t == TypeManager.int32_type)
- return new IntConstant (0);
+ return new IntConstant (0, Location.Null);
if (t == TypeManager.uint32_type)
- return new UIntConstant (0);
+ return new UIntConstant (0, Location.Null);
if (t == TypeManager.int64_type)
- return new LongConstant (0);
+ return new LongConstant (0, Location.Null);
if (t == TypeManager.uint64_type)
- return new ULongConstant (0);
+ return new ULongConstant (0, Location.Null);
if (t == TypeManager.float_type)
- return new FloatConstant (0);
+ return new FloatConstant (0, Location.Null);
if (t == TypeManager.double_type)
- return new DoubleConstant (0);
+ return new DoubleConstant (0, Location.Null);
if (t == TypeManager.short_type)
- return new ShortConstant (0);
+ return new ShortConstant (0, Location.Null);
if (t == TypeManager.ushort_type)
- return new UShortConstant (0);
+ return new UShortConstant (0, Location.Null);
if (t == TypeManager.sbyte_type)
- return new SByteConstant (0);
+ return new SByteConstant (0, Location.Null);
if (t == TypeManager.byte_type)
- return new ByteConstant (0);
+ return new ByteConstant (0, Location.Null);
if (t == TypeManager.char_type)
- return new CharConstant ('\0');
+ return new CharConstant ('\0', Location.Null);
if (t == TypeManager.bool_type)
- return new BoolConstant (false);
+ return new BoolConstant (false, Location.Null);
if (t == TypeManager.decimal_type)
- return new DecimalConstant (0);
+ return new DecimalConstant (0, Location.Null);
return null;
}
return RequestedType;
return this;
}
-
+
TypeExpr texpr = RequestedType.ResolveAsTypeTerminal (ec, false);
if (texpr == null)
return null;
if (c != null)
return c;
}
-
- CheckObsoleteAttribute (type);
- bool IsDelegate = TypeManager.IsDelegateType (type);
-
- if (IsDelegate){
+ if (TypeManager.IsDelegateType (type)) {
RequestedType = (new NewDelegate (type, Arguments, loc)).Resolve (ec);
if (RequestedType != null)
if (!(RequestedType is DelegateCreation))
}
if (type.IsAbstract && type.IsSealed) {
- Report.Error (712, loc, "Cannot create an instance of the static class '{0}'", TypeManager.CSharpName (type));
+ Report.SymbolRelatedToPreviousError (type);
+ Report.Error (712, loc, "Cannot create an instance of the static class `{0}'", TypeManager.CSharpName (type));
return null;
}
if (type.IsInterface || type.IsAbstract){
- Error (144, "It is not possible to create instances of interfaces or abstract classes");
+ Report.SymbolRelatedToPreviousError (type);
+ Report.Error (144, loc, "Cannot create an instance of the abstract class or interface `{0}'", TypeManager.CSharpName (type));
return null;
}
-
+
bool is_struct = type.IsValueType;
eclass = ExprClass.Value;
//
if (is_struct && Arguments == null)
return this;
-
- Expression ml;
+
// For member-lookup, treat 'new Foo (bar)' as call to 'foo.ctor (bar)', where 'foo' is of type 'Foo'.
- ml = MemberLookupFinal (ec, type, type, ".ctor",
- MemberTypes.Constructor,
- AllBindingFlags | BindingFlags.DeclaredOnly, loc);
+ Expression ml = MemberLookupFinal (ec, type, type, ".ctor",
+ MemberTypes.Constructor, AllBindingFlags | BindingFlags.DeclaredOnly, loc);
if (ml == null)
return null;
-
- if (! (ml is MethodGroupExpr)){
- if (!is_struct){
- ml.Error_UnexpectedKind ("method group", loc);
- return null;
- }
+
+ MethodGroupExpr mg = ml as MethodGroupExpr;
+
+ if (mg == null) {
+ ml.Error_UnexpectedKind (ec, "method group", loc);
+ return null;
}
- if (ml != null) {
- if (Arguments != null){
- foreach (Argument a in Arguments){
- if (!a.Resolve (ec, loc))
- return null;
- }
+ if (Arguments != null){
+ foreach (Argument a in Arguments){
+ if (!a.Resolve (ec, loc))
+ return null;
}
-
- method = Invocation.OverloadResolve (
- ec, (MethodGroupExpr) ml, Arguments, true, loc);
-
}
+ method = Invocation.OverloadResolve (ec, mg, Arguments, false, loc);
if (method == null) {
- if (almostMatchedMembers.Count != 0) {
+ if (almostMatchedMembers.Count != 0)
MemberLookupFailed (ec, type, type, ".ctor", null, true, loc);
- return null;
- }
-
- if (!is_struct || Arguments.Count > 0) {
- Error (1501, String.Format (
- "New invocation: Can not find a constructor in `{0}' for this argument list",
- TypeManager.CSharpName (type)));
- return null;
- }
+ return null;
}
return this;
void Error_IncorrectArrayInitializer ()
{
- Error (178, "Incorrectly structured array initializer");
+ Error (178, "Invalid rank specifier: expected `,' or `]'");
}
public bool CheckIndices (EmitContext ec, ArrayList probe, int idx, bool specified_dims)
}
int child_bounds = -1;
- foreach (object o in probe) {
+ for (int i = 0; i < probe.Count; ++i) {
+ object o = probe [i];
if (o is ArrayList) {
- int current_bounds = ((ArrayList) o).Count;
+ ArrayList sub_probe = o as ArrayList;
+ int current_bounds = sub_probe.Count;
if (child_bounds == -1)
child_bounds = current_bounds;
return false;
}
if (specified_dims && (idx + 1 >= arguments.Count)){
- Error (623, "Array initializers can only be used in a variable or field initializer, try using the new expression");
+ Error (623, "Array initializers can only be used in a variable or field initializer. Try using a new expression instead");
return false;
}
- bool ret = CheckIndices (ec, (ArrayList) o, idx + 1, specified_dims);
+ bool ret = CheckIndices (ec, sub_probe, idx + 1, specified_dims);
if (!ret)
return false;
} else {
Expression tmp = (Expression) o;
tmp = tmp.Resolve (ec);
+ probe [i] = tmp;
if (tmp == null)
return false;
int i = 0;
for (ArrayList probe = initializers; probe != null;) {
if (probe.Count > 0 && probe [0] is ArrayList) {
- Expression e = new IntConstant (probe.Count);
+ Expression e = new IntConstant (probe.Count, Location.Null);
arguments.Add (new Argument (e, Argument.AType.Expression));
bounds [i++] = probe.Count;
probe = (ArrayList) probe [0];
} else {
- Expression e = new IntConstant (probe.Count);
+ Expression e = new IntConstant (probe.Count, Location.Null);
arguments.Add (new Argument (e, Argument.AType.Expression));
bounds [i++] = probe.Count;
}
}
- //
- // Converts `source' to an int, uint, long or ulong.
- //
- Expression ExpressionToArrayArgument (EmitContext ec, Expression source)
- {
- Expression target;
-
- bool old_checked = ec.CheckState;
- ec.CheckState = true;
-
- target = Convert.ImplicitConversion (ec, source, TypeManager.int32_type, loc);
- if (target == null){
- target = Convert.ImplicitConversion (ec, source, TypeManager.uint32_type, loc);
- if (target == null){
- target = Convert.ImplicitConversion (ec, source, TypeManager.int64_type, loc);
- if (target == null){
- target = Convert.ImplicitConversion (ec, source, TypeManager.uint64_type, loc);
- if (target == null)
- Convert.Error_CannotImplicitConversion (loc, source.Type, TypeManager.int32_type);
- }
- }
- }
- ec.CheckState = old_checked;
-
- //
- // Only positive constants are allowed at compile time
- //
- if (target is Constant){
- if (target is IntConstant){
- if (((IntConstant) target).Value < 0){
- Expression.Error_NegativeArrayIndex (loc);
- return null;
- }
- }
-
- if (target is LongConstant){
- if (((LongConstant) target).Value < 0){
- Expression.Error_NegativeArrayIndex (loc);
- return null;
- }
- }
-
- }
-
- return target;
- }
-
//
// Creates the type of the array
//
array_element_type = TypeManager.GetElementType (type);
if (array_element_type.IsAbstract && array_element_type.IsSealed) {
- Report.Error (719, loc, "'{0}': array elements cannot be of static type", TypeManager.CSharpName (array_element_type));
+ Report.Error (719, loc, "`{0}': array elements cannot be of static type", TypeManager.CSharpName (array_element_type));
return null;
}
AllBindingFlags, loc);
if (!(ml is MethodGroupExpr)) {
- ml.Error_UnexpectedKind ("method group", loc);
+ ml.Error_UnexpectedKind (ec, "method group", loc);
return null;
}
if (e is StringConstant || e is DecimalConstant || !(e is Constant) ||
num_automatic_initializers <= max_automatic_initializers) {
Type etype = e.Type;
-
+
ig.Emit (OpCodes.Dup);
for (int idx = 0; idx < dims; idx++)
// address of it, so we can store it.
//
if ((dims == 1) &&
- etype.IsSubclassOf (TypeManager.value_type) &&
+ TypeManager.IsValueType (etype) &&
(!TypeManager.IsBuiltinOrEnum (etype) ||
etype == TypeManager.decimal_type)) {
if (e is New){
get { return variable_info; }
}
- public bool VerifyFixed (bool is_expression)
+ public bool VerifyFixed ()
{
- if ((variable_info == null) || (variable_info.LocalInfo == null))
- return false;
- else
- return variable_info.LocalInfo.IsFixed;
+ return !TypeManager.IsValueType (Type);
}
public bool ResolveBase (EmitContext ec)
type = ec.ContainerType;
if (ec.IsStatic) {
- Error (26, "Keyword this not valid in static code");
+ Error (26, "Keyword `this' is not valid in a static property, static method, or static field initializer");
return false;
}
- if ((block != null) && (block.ThisVariable != null))
- variable_info = block.ThisVariable.VariableInfo;
+ if (block != null && block.Toplevel.ThisVariable != null)
+ variable_info = block.Toplevel.ThisVariable.VariableInfo;
if (ec.CurrentAnonymousMethod != null)
ec.CaptureThis ();
if (!ResolveBase (ec))
return null;
- if ((variable_info != null) && !variable_info.IsAssigned (ec)) {
- Error (188, "The this object cannot be used before all " +
- "of its fields are assigned to");
+ if ((variable_info != null) && !(type.IsValueType && ec.OmitStructFlowAnalysis) && !variable_info.IsAssigned (ec)) {
+ Error (188, "The `this' object cannot be used before all of its fields are assigned to");
variable_info.SetAssigned (ec);
return this;
}
if (ec.IsFieldInitializer) {
- Error (27, "Keyword `this' can't be used outside a constructor, " +
- "a method or a property.");
+ Error (27, "Keyword `this' is not available in the current context");
return null;
}
if (!ResolveBase (ec))
return null;
- if (ec.IsFieldInitializer || !ec.CurrentBlock.HasVarargs) {
+ if (ec.IsFieldInitializer || !ec.CurrentBlock.Toplevel.HasVarargs) {
Error (190, "The __arglist construct is valid only within " +
"a variable argument method.");
return null;
typearg = texpr.ResolveType (ec);
if (typearg == TypeManager.void_type) {
- Error (673, "System.Void cannot be used from C# - " +
- "use typeof (void) to get the void type object");
+ Error (673, "System.Void cannot be used from C#. Use typeof (void) to get the void type object");
return null;
}
UnsafeError (loc);
return null;
}
- CheckObsoleteAttribute (typearg);
type = TypeManager.type_type;
- eclass = ExprClass.Type;
+ // Even though what is returned is a type object, it's treated as a value by the compiler.
+ // In particular, 'typeof (Foo).X' is something totally different from 'Foo.X'.
+ eclass = ExprClass.Value;
return this;
}
{
type = TypeManager.type_type;
typearg = TypeManager.void_type;
- eclass = ExprClass.Type;
+ // See description in TypeOf.
+ eclass = ExprClass.Value;
return this;
}
}
int size_of = GetTypeSize (type_queried);
if (size_of > 0) {
- return new IntConstant (size_of);
+ return new IntConstant (size_of, loc);
}
if (!ec.InUnsafe) {
- Report.Error (233, loc, "'{0}' does not have a predefined size, therefore sizeof can only be used in an unsafe context (consider using System.Runtime.InteropServices.Marshal.SizeOf)",
+ Report.Error (233, loc, "`{0}' does not have a predefined size, therefore sizeof can only be used in an unsafe context (consider using System.Runtime.InteropServices.Marshal.SizeOf)",
TypeManager.CSharpName (type_queried));
return null;
}
- CheckObsoleteAttribute (type_queried);
-
- if (!TypeManager.IsUnmanagedType (type_queried)){
- Report.Error (208, loc, "Cannot take the size of an unmanaged type (" + TypeManager.CSharpName (type_queried) + ")");
+ if (!TypeManager.VerifyUnManaged (type_queried, loc)){
return null;
}
}
}
+ /// <summary>
+ /// Implements the qualified-alias-member (::) expression.
+ /// </summary>
+ public class QualifiedAliasMember : Expression
+ {
+ string alias, identifier;
+
+ public QualifiedAliasMember (string alias, string identifier, Location l)
+ {
+ this.alias = alias;
+ this.identifier = identifier;
+ loc = l;
+ }
+
+ public override FullNamedExpression ResolveAsTypeStep (EmitContext ec, bool silent)
+ {
+ if (alias == "global")
+ return new MemberAccess (RootNamespace.Global, identifier, loc).ResolveAsTypeStep (ec, silent);
+
+ int errors = Report.Errors;
+ FullNamedExpression fne = ec.DeclSpace.NamespaceEntry.LookupAlias (alias);
+ if (fne == null) {
+ if (errors == Report.Errors)
+ Report.Error (432, loc, "Alias `{0}' not found", alias);
+ return null;
+ }
+ if (fne.eclass != ExprClass.Namespace) {
+ if (!silent)
+ Report.Error (431, loc, "`{0}' cannot be used with '::' since it denotes a type", alias);
+ return null;
+ }
+ return new MemberAccess (fne, identifier, loc).ResolveAsTypeStep (ec, silent);
+ }
+
+ public override Expression DoResolve (EmitContext ec)
+ {
+ FullNamedExpression fne;
+ if (alias == "global") {
+ fne = RootNamespace.Global;
+ } else {
+ int errors = Report.Errors;
+ fne = ec.DeclSpace.NamespaceEntry.LookupAlias (alias);
+ if (fne == null) {
+ if (errors == Report.Errors)
+ Report.Error (432, loc, "Alias `{0}' not found", alias);
+ return null;
+ }
+ }
+
+ Expression retval = new MemberAccess (fne, identifier, loc).DoResolve (ec);
+ if (retval == null)
+ return null;
+
+ if (!(retval is FullNamedExpression)) {
+ Report.Error (687, loc, "The expression `{0}::{1}' did not resolve to a namespace or a type", alias, identifier);
+ return null;
+ }
+
+ // We defer this check till the end to match the behaviour of CSC
+ if (fne.eclass != ExprClass.Namespace) {
+ Report.Error (431, loc, "`{0}' cannot be used with '::' since it denotes a type", alias);
+ return null;
+ }
+ return retval;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ throw new InternalErrorException ("QualifiedAliasMember found in resolved tree");
+ }
+
+
+ public override string ToString ()
+ {
+ return alias + "::" + identifier;
+ }
+
+ public override string GetSignatureForError ()
+ {
+ return ToString ();
+ }
+ }
+
/// <summary>
/// Implements the member access expression
/// </summary>
public readonly string Identifier;
Expression expr;
+ // TODO: Location can be removed
public MemberAccess (Expression expr, string id, Location l)
{
this.expr = expr;
Identifier = id;
- loc = l;
+ loc = expr.Location;
}
public Expression Expr {
- get {
- return expr;
- }
+ get { return expr; }
}
- public Expression DoResolve (EmitContext ec, Expression right_side, ResolveFlags flags)
+ // TODO: this method has very poor performace for Enum fields and
+ // probably for other constants as well
+ Expression DoResolve (EmitContext ec, Expression right_side)
{
if (type != null)
throw new Exception ();
//
SimpleName original = expr as SimpleName;
- expr = expr.Resolve (ec, flags | ResolveFlags.Intermediate | ResolveFlags.DisableFlowAnalysis);
- if (expr == null)
+ Expression new_expr = expr.Resolve (ec,
+ ResolveFlags.VariableOrValue | ResolveFlags.Type |
+ ResolveFlags.Intermediate | ResolveFlags.DisableStructFlowAnalysis);
+
+ if (new_expr == null)
return null;
- if (expr is Namespace) {
- Namespace ns = (Namespace) expr;
+ if (new_expr is Namespace) {
+ Namespace ns = (Namespace) new_expr;
FullNamedExpression retval = ns.Lookup (ec.DeclSpace, Identifier, loc);
if (retval == null)
- Report.Error (234, loc, "The type or namespace name `{0}' could not be found in namespace `{1}'", Identifier, ns.FullName);
+ Report.Error (234, loc, "The type or namespace name `{0}' does not exist in the namespace `{1}'. Are you missing an assembly reference?",
+ Identifier, ns.FullName);
return retval;
}
-
- //
- // TODO: I mailed Ravi about this, and apparently we can get rid
- // of this and put it in the right place.
- //
- // Handle enums here when they are in transit.
- // Note that we cannot afford to hit MemberLookup in this case because
- // it will fail to find any members at all
- //
-
- Type expr_type = expr.Type;
- if (expr is TypeExpr){
- if (!ec.DeclSpace.CheckAccessLevel (expr_type)){
- Report.Error (122, loc, "'{0}' is inaccessible due to its protection level", expr_type);
- return null;
- }
-
- if (expr_type == TypeManager.enum_type || expr_type.IsSubclassOf (TypeManager.enum_type)){
- Enum en = TypeManager.LookupEnum (expr_type);
-
- if (en != null) {
- object value = en.LookupEnumValue (Identifier, loc);
-
- if (value != null){
- MemberCore mc = en.GetDefinition (Identifier);
- ObsoleteAttribute oa = mc.GetObsoleteAttribute (en);
- if (oa != null) {
- AttributeTester.Report_ObsoleteMessage (oa, mc.GetSignatureForError (), Location);
- }
- oa = en.GetObsoleteAttribute (en);
- if (oa != null) {
- AttributeTester.Report_ObsoleteMessage (oa, en.GetSignatureForError (), Location);
- }
-
- Constant c = Constantify (value, en.UnderlyingType);
- return new EnumConstant (c, expr_type);
- }
- } else {
- CheckObsoleteAttribute (expr_type);
- FieldInfo fi = expr_type.GetField (Identifier);
- if (fi != null) {
- ObsoleteAttribute oa = AttributeTester.GetMemberObsoleteAttribute (fi);
- if (oa != null)
- AttributeTester.Report_ObsoleteMessage (oa, TypeManager.GetFullNameSignature (fi), Location);
- }
- }
- }
- }
-
+ Type expr_type = new_expr.Type;
if (expr_type.IsPointer){
Error (23, "The `.' operator can not be applied to pointer operands (" +
TypeManager.CSharpName (expr_type) + ")");
return null;
if (member_lookup is TypeExpr) {
- if (!(expr is TypeExpr) &&
- (original == null || !original.IdenticalNameAndTypeName (ec, expr, loc))) {
- Error (572, "Can't reference type `" + Identifier + "' through an expression; try `" +
- member_lookup.Type + "' instead");
+ if (!(new_expr is TypeExpr) &&
+ (original == null || !original.IdenticalNameAndTypeName (ec, new_expr, loc))) {
+ Report.Error (572, loc, "`{0}': cannot reference a type through an expression; try `{1}' instead",
+ Identifier, member_lookup.GetSignatureForError ());
return null;
}
}
MemberExpr me = (MemberExpr) member_lookup;
- member_lookup = me.ResolveMemberAccess (ec, expr, loc, original);
+ member_lookup = me.ResolveMemberAccess (ec, new_expr, loc, original);
if (member_lookup == null)
return null;
+ if (original != null && !TypeManager.IsValueType (expr_type)) {
+ me = member_lookup as MemberExpr;
+ if (me != null && me.IsInstance) {
+ LocalVariableReference var = new_expr as LocalVariableReference;
+ if (var != null && !var.VerifyAssigned (ec))
+ return null;
+ }
+ }
+
// The following DoResolve/DoResolveLValue will do the definite assignment
// check.
if (right_side != null)
- member_lookup = member_lookup.DoResolveLValue (ec, right_side);
+ return member_lookup.DoResolveLValue (ec, right_side);
else
- member_lookup = member_lookup.DoResolve (ec);
-
- return member_lookup;
+ return member_lookup.DoResolve (ec);
}
public override Expression DoResolve (EmitContext ec)
{
- return DoResolve (ec, null, ResolveFlags.VariableOrValue | ResolveFlags.Type);
+ return DoResolve (ec, null);
}
public override Expression DoResolveLValue (EmitContext ec, Expression right_side)
{
- return DoResolve (ec, right_side, ResolveFlags.VariableOrValue | ResolveFlags.Type);
+ return DoResolve (ec, right_side);
}
- public override FullNamedExpression ResolveAsTypeStep (EmitContext ec)
+ public override FullNamedExpression ResolveAsTypeStep (EmitContext ec, bool silent)
{
- return ResolveNamespaceOrType (ec, false);
+ return ResolveNamespaceOrType (ec, silent);
}
public FullNamedExpression ResolveNamespaceOrType (EmitContext ec, bool silent)
{
- FullNamedExpression new_expr = expr.ResolveAsTypeStep (ec);
+ FullNamedExpression new_expr = expr.ResolveAsTypeStep (ec, silent);
- if (new_expr == null)
+ if (new_expr == null) {
+ Report.Error (234, "No such name or typespace {0}", expr);
return null;
+ }
if (new_expr is Namespace) {
Namespace ns = (Namespace) new_expr;
FullNamedExpression retval = ns.Lookup (ec.DeclSpace, Identifier, loc);
if (!silent && retval == null)
- Report.Error (234, loc, "The type or namespace name `{0}' could not be found in namespace `{1}'", Identifier, ns.FullName);
+ Report.Error (234, loc, "The type or namespace name `{0}' does not exist in the namespace `{1}'. Are you missing an assembly reference?",
+ Identifier, ns.FullName);
return retval;
}
int errors = Report.Errors;
MemberLookupFailed (ec, expr_type, expr_type, Identifier, null, false, loc);
- if (!silent && errors == Report.Errors)
- Report.Error (234, loc, "The type name `{0}' could not be found in type `{1}'",
- Identifier, new_expr.FullName);
+ if (!silent && errors == Report.Errors) {
+ Report.Error (426, loc, "The nested type `{0}' does not exist in the type `{1}'",
+ Identifier, new_expr.GetSignatureForError ());
+ }
return null;
}
if (!(member_lookup is TypeExpr)) {
- Report.Error (118, loc, "'{0}.{1}' denotes a '{2}', where a type was expected",
- new_expr.FullName, Identifier, member_lookup.ExprClassName ());
+ new_expr.Error_UnexpectedKind (ec, "type", loc);
return null;
}
{
return expr + "." + Identifier;
}
+
+ public override string GetSignatureForError ()
+ {
+ return expr.GetSignatureForError () + "." + Identifier;
+ }
}
/// <summary>
public ArrayList Arguments;
public Expression Expr;
- public ElementAccess (Expression e, ArrayList e_list, Location l)
+ public ElementAccess (Expression e, ArrayList e_list)
{
Expr = e;
- loc = l;
+ loc = e.Location;
if (e_list == null)
return;
Expression MakePointerAccess (EmitContext ec, Type t)
{
if (t == TypeManager.void_ptr_type){
- Error (242, "The array index operation is not valid for void pointers");
+ Error (242, "The array index operation is not valid on void pointers");
return null;
}
if (Arguments.Count != 1){
- Error (196, "A pointer must be indexed by a single value");
+ Error (196, "A pointer must be indexed by only one value");
return null;
}
Expression p;
Type t = Expr.Type;
if (t == TypeManager.array_type){
- Report.Error (21, loc, "Cannot use indexer on System.Array");
+ Report.Error (21, loc, "Cannot apply indexing with [] to an expression of type `System.Array'");
return null;
}
Type t = Expr.Type;
if (t.IsArray)
- return (new ArrayAccess (this, loc)).ResolveLValue (ec, right_side);
+ return (new ArrayAccess (this, loc)).DoResolveLValue (ec, right_side);
if (t.IsPointer)
return MakePointerAccess (ec, Expr.Type);
if (ff != null) {
if (!(fe.InstanceExpression is LocalVariableReference) &&
!(fe.InstanceExpression is This)) {
- Error (1708, "Fixed buffers can only be accessed through locals or fields");
+ Report.Error (1708, loc, "Fixed size buffers can only be accessed through locals or fields");
return null;
}
// TODO: not sure whether it is correct
return MakePointerAccess (ec, ff.ElementType);
}
}
- return (new IndexerAccess (this, loc)).ResolveLValue (ec, right_side);
+ return (new IndexerAccess (this, loc)).DoResolveLValue (ec, right_side);
}
public override void Emit (EmitContext ec)
Type t = ea.Expr.Type;
if (t.GetArrayRank () != ea.Arguments.Count){
- ea.Error (22,
- "Incorrect number of indexes for array " +
- " expected: " + t.GetArrayRank () + " got: " +
- ea.Arguments.Count);
+ Report.Error (22, ea.Location, "Wrong number of indexes `{0}' inside [], expected `{1}'",
+ ea.Arguments.Count, t.GetArrayRank ());
return null;
}
argtype == TypeManager.uint64_type) {
Constant c = a.Expr as Constant;
if (c != null && c.IsNegative) {
- Report.Warning (251, 2, a.Expr.Location, "Indexing an array with a negative index (array indices always start at zero)");
+ Report.Warning (251, 2, ea.Location, "Indexing an array with a negative index (array indices always start at zero)");
}
continue;
}
} else if (type.IsValueType){
ig.Emit (OpCodes.Ldelema, type);
ig.Emit (OpCodes.Ldobj, type);
- } else
+ } else if (type.IsPointer)
+ ig.Emit (OpCodes.Ldelem_I);
+ else
ig.Emit (OpCodes.Ldelem_Ref);
}
} else if (t.IsValueType) {
is_stobj = true;
return OpCodes.Stobj;
- } else
+ } else if (t.IsPointer)
+ return OpCodes.Stelem_I;
+ else
return OpCodes.Stelem_Ref;
}
ig.Emit (OpCodes.Call, address);
}
}
- }
+ public void EmitGetLength (EmitContext ec, int dim)
+ {
+ int rank = ea.Expr.Type.GetArrayRank ();
+ ILGenerator ig = ec.ig;
+
+ ea.Expr.Emit (ec);
+ if (rank == 1) {
+ ig.Emit (OpCodes.Ldlen);
+ ig.Emit (OpCodes.Conv_I4);
+ } else {
+ IntLiteral.EmitInt (ig, dim);
+ ig.Emit (OpCodes.Callvirt, TypeManager.int_getlength_int);
+ }
+ }
+ }
class Indexers {
- public ArrayList Properties;
- static Hashtable map;
+ // note that the ArrayList itself in mutable. We just can't assign to 'Properties' again.
+ public readonly ArrayList Properties;
+ static Indexers empty;
public struct Indexer {
- public readonly Type Type;
+ public readonly PropertyInfo PropertyInfo;
public readonly MethodInfo Getter, Setter;
- public Indexer (Type type, MethodInfo get, MethodInfo set)
+ public Indexer (PropertyInfo property_info, MethodInfo get, MethodInfo set)
{
- this.Type = type;
+ this.PropertyInfo = property_info;
this.Getter = get;
this.Setter = set;
}
static Indexers ()
{
- map = new Hashtable ();
+ empty = new Indexers (null);
}
- Indexers ()
+ Indexers (ArrayList array)
{
- Properties = new ArrayList ();
+ Properties = array;
}
-
- void Append (MemberInfo [] mi)
+
+ static void Append (ref Indexers ix, Type caller_type, MemberInfo [] mi)
{
+ bool dummy;
+ if (mi == null)
+ return;
foreach (PropertyInfo property in mi){
MethodInfo get, set;
get = property.GetGetMethod (true);
set = property.GetSetMethod (true);
- Properties.Add (new Indexer (property.PropertyType, get, set));
+ if (get != null && !Expression.IsAccessorAccessible (caller_type, get, out dummy))
+ get = null;
+ if (set != null && !Expression.IsAccessorAccessible (caller_type, set, out dummy))
+ set = null;
+ if (get != null || set != null) {
+ if (ix == empty)
+ ix = new Indexers (new ArrayList ());
+ ix.Properties.Add (new Indexer (property, get, set));
+ }
}
}
{
string p_name = TypeManager.IndexerPropertyName (lookup_type);
- MemberInfo [] mi = TypeManager.MemberLookup (
+ return TypeManager.MemberLookup (
caller_type, caller_type, lookup_type, MemberTypes.Property,
BindingFlags.Public | BindingFlags.Instance |
BindingFlags.DeclaredOnly, p_name, null);
-
- if (mi == null || mi.Length == 0)
- return null;
-
- return mi;
}
static public Indexers GetIndexersForType (Type caller_type, Type lookup_type, Location loc)
{
- Indexers ix = (Indexers) map [lookup_type];
-
- if (ix != null)
- return ix;
+ Indexers ix = empty;
Type copy = lookup_type;
while (copy != TypeManager.object_type && copy != null){
- MemberInfo [] mi = GetIndexersForTypeOrInterface (caller_type, copy);
-
- if (mi != null){
- if (ix == null)
- ix = new Indexers ();
-
- ix.Append (mi);
- }
-
+ Append (ref ix, caller_type, GetIndexersForTypeOrInterface (caller_type, copy));
copy = copy.BaseType;
}
- if (!lookup_type.IsInterface)
- return ix;
-
- Type [] ifaces = TypeManager.GetInterfaces (lookup_type);
- if (ifaces != null) {
- foreach (Type itype in ifaces) {
- MemberInfo [] mi = GetIndexersForTypeOrInterface (caller_type, itype);
- if (mi != null){
- if (ix == null)
- ix = new Indexers ();
-
- ix.Append (mi);
- }
+ if (lookup_type.IsInterface) {
+ Type [] ifaces = TypeManager.GetInterfaces (lookup_type);
+ if (ifaces != null) {
+ foreach (Type itype in ifaces)
+ Append (ref ix, caller_type, GetIndexersForTypeOrInterface (caller_type, itype));
}
}
bool found_any = false, found_any_getters = false;
Type lookup_type = indexer_type;
- Indexers ilist;
- ilist = Indexers.GetIndexersForType (current_type, lookup_type, loc);
- if (ilist != null) {
+ Indexers ilist = Indexers.GetIndexersForType (current_type, lookup_type, loc);
+ if (ilist.Properties != null) {
found_any = true;
- if (ilist.Properties != null) {
- foreach (Indexers.Indexer ix in ilist.Properties) {
- if (ix.Getter != null)
- AllGetters.Add(ix.Getter);
- }
+ foreach (Indexers.Indexer ix in ilist.Properties) {
+ if (ix.Getter != null)
+ AllGetters.Add (ix.Getter);
}
}
}
if (!found_any) {
- Report.Error (21, loc,
- "Type `" + TypeManager.CSharpName (indexer_type) +
- "' does not have any indexers defined");
+ Report.Error (21, loc, "Cannot apply indexing with [] to an expression of type `{0}'",
+ TypeManager.CSharpName (indexer_type));
return null;
}
if (!found_any_getters) {
- Error (154, "indexer can not be used in this context, because " +
- "it lacks a `get' accessor");
+ Report.Error (154, loc, "The property or indexer `{0}' cannot be used in this context because it lacks the `get' accessor",
+ "XXXXXXXX");
return null;
}
if (get == null) {
- Error (1501, "No Overload for method `this' takes `" +
- arguments.Count + "' arguments");
+ Invocation.Error_WrongNumArguments (loc, "this", arguments.Count);
return null;
}
// Only base will allow this invocation to happen.
//
if (get.IsAbstract && this is BaseIndexerAccess){
- Report.Error (205, loc, "Cannot call an abstract base indexer: " + Invocation.FullMethodDesc (get));
+ Error_CannotCallAbstractBase (TypeManager.CSharpSignature (get));
return null;
}
bool found_any = false, found_any_setters = false;
Indexers ilist = Indexers.GetIndexersForType (current_type, indexer_type, loc);
- if (ilist != null) {
+ if (ilist.Properties != null) {
found_any = true;
- if (ilist.Properties != null) {
- foreach (Indexers.Indexer ix in ilist.Properties) {
- if (ix.Setter != null)
- AllSetters.Add(ix.Setter);
- }
+ foreach (Indexers.Indexer ix in ilist.Properties) {
+ if (ix.Setter != null)
+ AllSetters.Add (ix.Setter);
}
}
if (AllSetters.Count > 0) {
}
if (!found_any) {
- Report.Error (21, loc,
- "Type `" + TypeManager.CSharpName (indexer_type) +
- "' does not have any indexers defined");
+ Report.Error (21, loc, "Cannot apply indexing with [] to an expression of type `{0}'",
+ TypeManager.CSharpName (indexer_type));
return null;
}
}
if (set == null) {
- Error (1501, "No Overload for method `this' takes `" +
- arguments.Count + "' arguments");
+ Invocation.Error_WrongNumArguments (loc, "this", arguments.Count);
return null;
}
// Only base will allow this invocation to happen.
//
if (set.IsAbstract && this is BaseIndexerAccess){
- Report.Error (205, loc, "Cannot call an abstract base indexer: " + Invocation.FullMethodDesc (set));
+ Error_CannotCallAbstractBase (TypeManager.CSharpSignature (set));
return null;
}
type = TypeManager.void_type; // default value
foreach (Indexers.Indexer ix in ilist.Properties){
if (ix.Setter == set){
- type = ix.Type;
+ type = ix.PropertyInfo.PropertyType;
break;
}
}
-
+
instance_expr.CheckMarshallByRefAccess (ec.ContainerType);
eclass = ExprClass.IndexerAccess;
Type base_type = current_type.BaseType;
if (ec.IsStatic){
- Error (1511, "Keyword base is not allowed in static method");
+ Error (1511, "Keyword `base' is not available in a static method");
return null;
}
if (ec.IsFieldInitializer){
- Error (1512, "Keyword base is not available in the current context");
+ Error (1512, "Keyword `base' is not available in the current context");
return null;
}
public class EmptyExpression : Expression {
public static readonly EmptyExpression Null = new EmptyExpression ();
+ static EmptyExpression temp = new EmptyExpression ();
+ public static EmptyExpression Grab ()
+ {
+ if (temp == null)
+ throw new InternalErrorException ("Nested Grab");
+ EmptyExpression retval = temp;
+ temp = null;
+ return retval;
+ }
+
+ public static void Release (EmptyExpression e)
+ {
+ if (temp != null)
+ throw new InternalErrorException ("Already released");
+ temp = e;
+ }
+
// TODO: should be protected
public EmptyExpression ()
{
Expression left;
string dim;
+ public ComposedCast (Expression left, string dim)
+ : this (left, dim, left.Location)
+ {
+ }
+
public ComposedCast (Expression left, string dim, Location l)
{
this.left = left;
if (lexpr == null)
return null;
+ bool old = ec.TestObsoleteMethodUsage;
+ ec.TestObsoleteMethodUsage = false;
Type ltype = lexpr.ResolveType (ec);
+ ec.TestObsoleteMethodUsage = old;
if ((ltype == TypeManager.void_type) && (dim != "*")) {
Report.Error (1547, Location,
return null;
}
+ if (dim == "*" && !TypeManager.VerifyUnManaged (ltype, loc)) {
+ return null;
+ }
+
type = TypeManager.GetConstructedType (ltype, dim);
if (type == null) {
throw new InternalErrorException ("Couldn't create computed type " + ltype + dim);
if (type.IsArray && (type.GetElementType () == TypeManager.arg_iterator_type ||
type.GetElementType () == TypeManager.typed_reference_type)) {
- Report.Error (611, loc, "Array elements cannot be of type '{0}'", TypeManager.CSharpName (type.GetElementType ()));
+ Report.Error (611, loc, "Array elements cannot be of type `{0}'", TypeManager.CSharpName (type.GetElementType ()));
return null;
}
}
}
- public class FixedBufferPtr: Expression {
+ public class FixedBufferPtr : Expression {
Expression array;
public FixedBufferPtr (Expression array, Type array_type, Location l)
return null;
}
- if (ec.CurrentBranching.InCatch () ||
- ec.CurrentBranching.InFinally (true)) {
- Error (255,
- "stackalloc can not be used in a catch or finally block");
+ if (ec.InCatch || ec.InFinally) {
+ Error (255, "Cannot use stackalloc in finally or catch");
return null;
}
projects / mono.git / blobdiff