//
// Copyright 2001, 2002, 2003 Ximian, Inc.
// Copyright 2003-2008 Novell, Inc.
+// Copyright 2011 Xamarin Inc (http://www.xamarin.com)
//
using System;
using System.Collections.Generic;
-using System.Diagnostics;
-using System.Reflection;
+
+#if STATIC
+using IKVM.Reflection.Emit;
+#else
using System.Reflection.Emit;
+#endif
namespace Mono.CSharp {
//
// A container class for all the conversion operations
//
- static class Convert {
-
- static EmptyExpression MyEmptyExpr;
-
- static Convert ()
- {
- Reset ();
- }
-
- public static void Reset ()
- {
- MyEmptyExpr = null;
- }
-
+ static class Convert
+ {
//
// From a one-dimensional array-type S[] to System.Collections.IList<T> and base
// interfaces of this interface, provided there is an implicit reference conversion
//
static bool ArrayToIList (ArrayContainer array, TypeSpec list, bool isExplicit)
{
- if (array.Rank != 1 || !list.IsGeneric)
- return false;
-
- var open_version = list.GetDefinition ();
- if ((open_version != TypeManager.generic_ilist_type) &&
- (open_version != TypeManager.generic_icollection_type) &&
- (open_version != TypeManager.generic_ienumerable_type))
+ if (array.Rank != 1 || !list.IsGenericIterateInterface)
return false;
var arg_type = list.TypeArguments[0];
if (array.Element == arg_type)
return true;
+ //
+ // Reject conversion from T[] to IList<U> even if T has U dependency
+ //
+ if (arg_type.IsGenericParameter)
+ return false;
+
if (isExplicit)
return ExplicitReferenceConversionExists (array.Element, arg_type);
- if (MyEmptyExpr == null)
- MyEmptyExpr = new EmptyExpression (array.Element);
- else
- MyEmptyExpr.SetType (array.Element);
-
- return ImplicitReferenceConversionExists (MyEmptyExpr, arg_type);
+ return ImplicitReferenceConversionExists (array.Element, arg_type);
}
static bool IList_To_Array(TypeSpec list, ArrayContainer array)
{
- if (array.Rank != 1 || !list.IsGeneric)
- return false;
-
- var open_version = list.GetDefinition ();
- if ((open_version != TypeManager.generic_ilist_type) &&
- (open_version != TypeManager.generic_icollection_type) &&
- (open_version != TypeManager.generic_ienumerable_type))
+ if (array.Rank != 1 || !list.IsGenericIterateInterface)
return false;
var arg_type = list.TypeArguments[0];
if (array.Element == arg_type)
return true;
- if (MyEmptyExpr == null)
- MyEmptyExpr = new EmptyExpression (array.Element);
- else
- MyEmptyExpr.SetType (array.Element);
-
- return ImplicitReferenceConversionExists (MyEmptyExpr, arg_type) || ExplicitReferenceConversionExists (array.Element, arg_type);
+ return ImplicitReferenceConversionExists (array.Element, arg_type) || ExplicitReferenceConversionExists (array.Element, arg_type);
}
- static Expression ImplicitTypeParameterConversion (Expression expr, TypeSpec target_type)
+ public static Expression ImplicitTypeParameterConversion (Expression expr, TypeParameterSpec expr_type, TypeSpec target_type)
{
- var expr_type = (TypeParameterSpec) expr.Type;
-
//
// From T to a type parameter U, provided T depends on U
//
- var ttype = target_type as TypeParameterSpec;
- if (ttype != null) {
+ if (target_type.IsGenericParameter) {
if (expr_type.TypeArguments != null) {
foreach (var targ in expr_type.TypeArguments) {
- if (!TypeSpecComparer.Override.IsEqual (ttype, targ))
+ if (!TypeSpecComparer.Override.IsEqual (target_type, targ))
continue;
- if (expr_type.IsReferenceType && !ttype.IsReferenceType)
+ if (expr == null)
+ return EmptyExpression.Null;
+
+ if (expr_type.IsReferenceType && !((TypeParameterSpec)target_type).IsReferenceType)
return new BoxedCast (expr, target_type);
return new ClassCast (expr, target_type);
}
//
- // LAMESPEC: From T to dynamic type
+ // LAMESPEC: From T to dynamic type because it's like T to object
//
- if (target_type == InternalType.Dynamic) {
+ if (target_type.BuiltinType == BuiltinTypeSpec.Type.Dynamic) {
+ if (expr == null)
+ return EmptyExpression.Null;
+
if (expr_type.IsReferenceType)
return new ClassCast (expr, target_type);
//
// From T to its effective base class C
- // From T to any base class of C
+ // From T to any base class of C (it cannot contain dynamic or be of dynamic type)
// From T to any interface implemented by C
//
var base_type = expr_type.GetEffectiveBase ();
- if (base_type == target_type || TypeManager.IsSubclassOf (base_type, target_type) || base_type.ImplementsInterface (target_type)) {
+ if (base_type == target_type || TypeSpec.IsBaseClass (base_type, target_type, false) || base_type.ImplementsInterface (target_type, true)) {
+ if (expr == null)
+ return EmptyExpression.Null;
+
if (expr_type.IsReferenceType)
return new ClassCast (expr, target_type);
}
if (target_type.IsInterface && expr_type.IsConvertibleToInterface (target_type)) {
+ if (expr == null)
+ return EmptyExpression.Null;
+
if (expr_type.IsReferenceType)
return new ClassCast (expr, target_type);
return source == null ? EmptyExpression.Null : new ClassCast (source, target_type);
}
}
-
+/*
if (target_tp.Interfaces != null) {
foreach (TypeSpec iface in target_tp.Interfaces) {
if (!TypeManager.IsGenericParameter (iface))
return source == null ? EmptyExpression.Null : new ClassCast (source, target_type, true);
}
}
-
+*/
return null;
}
return null;
}
- static Expression ImplicitReferenceConversion (Expression expr, TypeSpec target_type, bool explicit_cast)
+ public static Expression ImplicitReferenceConversion (Expression expr, TypeSpec target_type, bool explicit_cast)
{
TypeSpec expr_type = expr.Type;
- if (expr_type == null && expr.eclass == ExprClass.MethodGroup){
- // if we are a method group, emit a warning
-
- expr.Emit (null);
- }
-
- if (expr_type == TypeManager.void_type)
- return null;
-
if (expr_type.Kind == MemberKind.TypeParameter)
- return ImplicitTypeParameterConversion (expr, target_type);
+ return ImplicitTypeParameterConversion (expr, (TypeParameterSpec) expr.Type, target_type);
//
// from the null type to any reference-type.
//
NullLiteral nl = expr as NullLiteral;
if (nl != null) {
- return nl.ConvertImplicitly (null, target_type);
+ return nl.ConvertImplicitly (target_type);
}
- if (ImplicitReferenceConversionExists (expr, target_type)) {
+ if (ImplicitReferenceConversionExists (expr_type, target_type)) {
//
// Avoid wrapping implicitly convertible reference type
//
return EmptyCast.Create (expr, target_type);
}
- return ImplicitBoxingConversion (expr, expr_type, target_type);
+ return null;
}
//
- // 6.1.6 Implicit reference conversions
+ // Implicit reference conversions
//
- public static bool ImplicitReferenceConversionExists (Expression expr, TypeSpec target_type)
+ public static bool ImplicitReferenceConversionExists (TypeSpec expr_type, TypeSpec target_type)
{
- if (TypeManager.IsStruct (target_type))
+ return ImplicitReferenceConversionExists (expr_type, target_type, true);
+ }
+
+ public static bool ImplicitReferenceConversionExists (TypeSpec expr_type, TypeSpec target_type, bool refOnlyTypeParameter)
+ {
+ // It's here only to speed things up
+ if (target_type.IsStruct)
return false;
- TypeSpec expr_type = expr.Type;
+ switch (expr_type.Kind) {
+ case MemberKind.TypeParameter:
+ return ImplicitTypeParameterConversion (null, (TypeParameterSpec) expr_type, target_type) != null &&
+ (!refOnlyTypeParameter || TypeSpec.IsReferenceType (expr_type));
- // from the null type to any reference-type.
- if (expr_type == TypeManager.null_type)
- return target_type != InternalType.AnonymousMethod;
-
- if (TypeManager.IsGenericParameter (expr_type))
- return ImplicitTypeParameterConversion (expr, target_type) != null;
+ case MemberKind.Class:
+ //
+ // From any class-type to dynamic (+object to speed up common path)
+ //
+ if (target_type.BuiltinType == BuiltinTypeSpec.Type.Object || target_type.BuiltinType == BuiltinTypeSpec.Type.Dynamic)
+ return true;
- // This code is kind of mirrored inside ImplicitStandardConversionExists
- // with the small distinction that we only probe there
- //
- // Always ensure that the code here and there is in sync
+ if (target_type.IsClass) {
+ //
+ // Identity conversion, including dynamic erasure
+ //
+ if (TypeSpecComparer.IsEqual (expr_type, target_type))
+ return true;
- // from any class-type S to any interface-type T.
- if (target_type.IsInterface) {
- if (expr_type.ImplementsInterface (target_type)){
- return !TypeManager.IsValueType (expr_type);
+ //
+ // From any class-type S to any class-type T, provided S is derived from T
+ //
+ return TypeSpec.IsBaseClass (expr_type, target_type, true);
}
- }
- //
- // notice that it is possible to write "ValueType v = 1", the ValueType here
- // is an abstract class, and not really a value type, so we apply the same rules.
- //
- if (target_type == TypeManager.object_type || target_type == InternalType.Dynamic) {
//
- // A pointer type cannot be converted to object
+ // From any class-type S to any interface-type T, provided S implements T
//
- if (expr_type.IsPointer)
- return false;
-
- if (TypeManager.IsValueType (expr_type))
- return false;
-
- if (expr_type.IsClass || expr_type.IsInterface || expr_type == TypeManager.enum_type || expr_type.IsDelegate || expr_type.Kind == MemberKind.ArrayType) {
- // No mcs internal types are convertible
- return true; // expr_type.MetaInfo.Module != typeof (Convert).Module;
- }
+ if (target_type.IsInterface)
+ return expr_type.ImplementsInterface (target_type, true);
- // From anything to dynamic
- if (target_type == InternalType.Dynamic)
- return true;
+ return false;
- // From dynamic to object
- if (expr_type == InternalType.Dynamic)
+ case MemberKind.ArrayType:
+ //
+ // Identity array conversion
+ //
+ if (expr_type == target_type)
return true;
- return false;
- } else if (target_type == TypeManager.value_type) {
- return expr_type == TypeManager.enum_type;
- } else if (TypeManager.IsSubclassOf (expr_type, target_type)) {
//
- // Special case: enumeration to System.Enum.
- // System.Enum is not a value type, it is a class, so we need
- // a boxing conversion
+ // From any array-type to System.Array
//
- if (target_type == TypeManager.enum_type || TypeManager.IsGenericParameter (expr_type))
- return false;
-
- if (TypeManager.IsValueType (expr_type))
- return false;
-
- // Array type variance conversion
- //if (target_type.IsArray != expr_type.IsArray)
- // return false;
-
- return true;
- }
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.Array:
+ case BuiltinTypeSpec.Type.Object:
+ case BuiltinTypeSpec.Type.Dynamic:
+ return true;
+ }
- var expr_type_array = expr_type as ArrayContainer;
- if (expr_type_array != null) {
+ var expr_type_array = (ArrayContainer) expr_type;
var target_type_array = target_type as ArrayContainer;
- // from an array-type S to an array-type of type T
+
+ //
+ // From an array-type S to an array-type of type T
+ //
if (target_type_array != null && expr_type_array.Rank == target_type_array.Rank) {
//
- // Both SE and TE are reference-types
+ // Both SE and TE are reference-types. TE check is defered
+ // to ImplicitReferenceConversionExists
//
TypeSpec expr_element_type = expr_type_array.Element;
- if (!TypeManager.IsReferenceType (expr_element_type))
+ if (!TypeSpec.IsReferenceType (expr_element_type))
return false;
- TypeSpec target_element_type = target_type_array.Element;
- if (!TypeManager.IsReferenceType (target_element_type))
- return false;
+ //
+ // An implicit reference conversion exists from SE to TE
+ //
+ return ImplicitReferenceConversionExists (expr_element_type, target_type_array.Element);
+ }
- if (MyEmptyExpr == null)
- MyEmptyExpr = new EmptyExpression (expr_element_type);
- else
- MyEmptyExpr.SetType (expr_element_type);
+ //
+ // From any array-type to the interfaces it implements
+ //
+ if (target_type.IsInterface) {
+ if (expr_type.ImplementsInterface (target_type, false))
+ return true;
- return ImplicitStandardConversionExists (MyEmptyExpr, target_element_type);
+ // from an array-type of type T to IList<T>
+ if (ArrayToIList (expr_type_array, target_type, false))
+ return true;
}
- // from an array-type to System.Array
- if (target_type == TypeManager.array_type)
+ return false;
+
+ case MemberKind.Delegate:
+ //
+ // From any delegate-type to System.Delegate (and its base types)
+ //
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.Delegate:
+ case BuiltinTypeSpec.Type.MulticastDelegate:
+ case BuiltinTypeSpec.Type.Object:
+ case BuiltinTypeSpec.Type.Dynamic:
return true;
+ }
- // from an array-type of type T to IList<T>
- if (ArrayToIList (expr_type_array, target_type, false))
+ //
+ // Identity conversion, including dynamic erasure
+ //
+ if (TypeSpecComparer.IsEqual (expr_type, target_type))
return true;
- return false;
- }
+ //
+ // From any delegate-type to the interfaces it implements
+ // From any reference-type to an delegate type if is variance-convertible
+ //
+ return expr_type.ImplementsInterface (target_type, false) || TypeSpecComparer.Variant.IsEqual (expr_type, target_type);
- if (TypeSpecComparer.Variant.IsEqual (expr_type, target_type))
- return true;
+ case MemberKind.Interface:
+ //
+ // Identity conversion, including dynamic erasure
+ //
+ if (TypeSpecComparer.IsEqual (expr_type, target_type))
+ return true;
+
+ //
+ // From any interface type S to interface-type T
+ // From any reference-type to an interface if is variance-convertible
+ //
+ if (target_type.IsInterface)
+ return TypeSpecComparer.Variant.IsEqual (expr_type, target_type) || expr_type.ImplementsInterface (target_type, true);
- // from any interface type S to interface-type T.
- if (expr_type.IsInterface && target_type.IsInterface) {
- return expr_type.ImplementsInterface (target_type);
+ return target_type.BuiltinType == BuiltinTypeSpec.Type.Object || target_type.BuiltinType == BuiltinTypeSpec.Type.Dynamic;
}
- // from any delegate type to System.Delegate
- if (target_type == TypeManager.delegate_type &&
- (expr_type == TypeManager.delegate_type || expr_type.IsDelegate))
- return true;
+ //
+ // from the null literal to any reference-type.
+ //
+ if (expr_type == InternalType.NullLiteral) {
+ // Exlude internal compiler types
+ if (target_type.Kind == MemberKind.InternalCompilerType)
+ return target_type.BuiltinType == BuiltinTypeSpec.Type.Dynamic;
- if (TypeManager.IsEqual (expr_type, target_type))
- return true;
+ return TypeSpec.IsReferenceType (target_type);
+ }
return false;
}
public static Expression ImplicitBoxingConversion (Expression expr, TypeSpec expr_type, TypeSpec target_type)
{
+ switch (target_type.BuiltinType) {
//
- // From any value-type to the type object.
+ // From any non-nullable-value-type to the type object and dynamic
//
- if (target_type == TypeManager.object_type || target_type == InternalType.Dynamic) {
- //
- // A pointer type cannot be converted to object
- //
- if (expr_type.IsPointer)
- return null;
-
- if (!TypeManager.IsValueType (expr_type))
- return null;
-
- return expr == null ? EmptyExpression.Null : new BoxedCast (expr, target_type);
- }
-
+ case BuiltinTypeSpec.Type.Object:
+ case BuiltinTypeSpec.Type.Dynamic:
//
- // From any value-type to the type System.ValueType.
+ // From any non-nullable-value-type to the type System.ValueType
//
- if (target_type == TypeManager.value_type) {
- if (!TypeManager.IsValueType (expr_type))
+ case BuiltinTypeSpec.Type.ValueType:
+ //
+ // No ned to check for nullable type as underlying type is always convertible
+ //
+ if (!TypeSpec.IsValueType (expr_type))
return null;
return expr == null ? EmptyExpression.Null : new BoxedCast (expr, target_type);
- }
- if (target_type == TypeManager.enum_type) {
+ case BuiltinTypeSpec.Type.Enum:
//
// From any enum-type to the type System.Enum.
//
- if (TypeManager.IsEnumType (expr_type))
+ if (expr_type.IsEnum)
return expr == null ? EmptyExpression.Null : new BoxedCast (expr, target_type);
+
+ break;
}
//
// From a nullable-type to a reference type, if a boxing conversion exists from
// the underlying type to the reference type
//
- if (TypeManager.IsNullableType (expr_type)) {
- if (!TypeManager.IsReferenceType (target_type))
+ if (expr_type.IsNullableType) {
+ if (!TypeSpec.IsReferenceType (target_type))
return null;
var res = ImplicitBoxingConversion (expr, Nullable.NullableInfo.GetUnderlyingType (expr_type), target_type);
return res;
}
- if (TypeManager.IsSubclassOf (expr_type, target_type)) {
- //
- // Don't box same type arguments
- //
- if (TypeManager.IsGenericParameter (expr_type) && expr_type != target_type)
- return expr == null ? EmptyExpression.Null : new BoxedCast (expr, target_type);
-
- return null;
- }
-
- // This code is kind of mirrored inside ImplicitStandardConversionExists
- // with the small distinction that we only probe there
//
- // Always ensure that the code here and there is in sync
-
- // from any class-type S to any interface-type T.
- if (target_type.IsInterface) {
- if (expr_type.ImplementsInterface (target_type) &&
- (TypeManager.IsGenericParameter (expr_type) || TypeManager.IsValueType (expr_type))) {
- return expr == null ? EmptyExpression.Null : new BoxedCast (expr, target_type);
- }
+ // A value type has a boxing conversion to an interface type I if it has a boxing conversion
+ // to an interface or delegate type I0 and I0 is variance-convertible to I
+ //
+ if (target_type.IsInterface && TypeSpec.IsValueType (expr_type) && expr_type.ImplementsInterface (target_type, true)) {
+ return expr == null ? EmptyExpression.Null : new BoxedCast (expr, target_type);
}
return null;
//
// From null to any nullable type
//
- if (expr_type == TypeManager.null_type)
+ if (expr_type == InternalType.NullLiteral)
return ec == null ? EmptyExpression.Null : Nullable.LiftedNull.Create (target_type, expr.Location);
// S -> T?
TypeSpec t_el = Nullable.NullableInfo.GetUnderlyingType (target_type);
// S? -> T?
- if (TypeManager.IsNullableType (expr_type))
+ if (expr_type.IsNullableType)
expr_type = Nullable.NullableInfo.GetUnderlyingType (expr_type);
//
// conversion exists only mode
if (ec == null) {
- if (expr_type == t_el)
+ if (TypeSpecComparer.IsEqual (expr_type, t_el))
return EmptyExpression.Null;
if (expr is Constant)
- return ((Constant) expr).ConvertImplicitly (ec, t_el);
+ return ((Constant) expr).ConvertImplicitly (t_el);
return ImplicitNumericConversion (null, expr_type, t_el);
}
unwrap = expr;
Expression conv = unwrap;
- if (expr_type != t_el) {
+ if (!TypeSpecComparer.IsEqual (expr_type, t_el)) {
if (conv is Constant)
- conv = ((Constant)conv).ConvertImplicitly (ec, t_el);
+ conv = ((Constant)conv).ConvertImplicitly (t_el);
else
conv = ImplicitNumericConversion (conv, expr_type, t_el);
static Expression ImplicitNumericConversion (Expression expr, TypeSpec expr_type, TypeSpec target_type)
{
- if (expr_type == TypeManager.sbyte_type){
+ switch (expr_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.SByte:
//
// From sbyte to short, int, long, float, double, decimal
//
- if (target_type == TypeManager.int32_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.Int:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_I4);
- if (target_type == TypeManager.int64_type)
+ case BuiltinTypeSpec.Type.Long:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_I8);
- if (target_type == TypeManager.double_type)
+ case BuiltinTypeSpec.Type.Double:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_R8);
- if (target_type == TypeManager.float_type)
+ case BuiltinTypeSpec.Type.Float:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_R4);
- if (target_type == TypeManager.short_type)
+ case BuiltinTypeSpec.Type.Short:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_I2);
- if (target_type == TypeManager.decimal_type)
- return expr == null ? EmptyExpression.Null : new CastToDecimal (expr);
- } else if (expr_type == TypeManager.byte_type){
+ case BuiltinTypeSpec.Type.Decimal:
+ return expr == null ? EmptyExpression.Null : new OperatorCast (expr, target_type);
+
+ }
+
+ break;
+ case BuiltinTypeSpec.Type.Byte:
//
// From byte to short, ushort, int, uint, long, ulong, float, double, decimal
//
- if (target_type == TypeManager.int32_type || target_type == TypeManager.uint32_type ||
- target_type == TypeManager.short_type || target_type == TypeManager.ushort_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.Int:
+ case BuiltinTypeSpec.Type.UInt:
+ case BuiltinTypeSpec.Type.Short:
+ case BuiltinTypeSpec.Type.UShort:
return expr == null ? EmptyExpression.Null : EmptyCast.Create (expr, target_type);
-
- if (target_type == TypeManager.uint64_type)
+ case BuiltinTypeSpec.Type.ULong:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_U8);
- if (target_type == TypeManager.int64_type)
+ case BuiltinTypeSpec.Type.Long:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_I8);
- if (target_type == TypeManager.float_type)
+ case BuiltinTypeSpec.Type.Float:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_R4);
- if (target_type == TypeManager.double_type)
+ case BuiltinTypeSpec.Type.Double:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_R8);
- if (target_type == TypeManager.decimal_type)
- return expr == null ? EmptyExpression.Null : new CastToDecimal (expr);
-
- } else if (expr_type == TypeManager.short_type){
+ case BuiltinTypeSpec.Type.Decimal:
+ return expr == null ? EmptyExpression.Null : new OperatorCast (expr, target_type);
+ }
+ break;
+ case BuiltinTypeSpec.Type.Short:
//
// From short to int, long, float, double, decimal
//
- if (target_type == TypeManager.int32_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.Int:
return expr == null ? EmptyExpression.Null : EmptyCast.Create (expr, target_type);
- if (target_type == TypeManager.int64_type)
+ case BuiltinTypeSpec.Type.Long:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_I8);
- if (target_type == TypeManager.double_type)
+ case BuiltinTypeSpec.Type.Double:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_R8);
- if (target_type == TypeManager.float_type)
+ case BuiltinTypeSpec.Type.Float:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_R4);
- if (target_type == TypeManager.decimal_type)
- return expr == null ? EmptyExpression.Null : new CastToDecimal (expr);
-
- } else if (expr_type == TypeManager.ushort_type){
+ case BuiltinTypeSpec.Type.Decimal:
+ return expr == null ? EmptyExpression.Null : new OperatorCast (expr, target_type);
+ }
+ break;
+ case BuiltinTypeSpec.Type.UShort:
//
// From ushort to int, uint, long, ulong, float, double, decimal
//
- if (target_type == TypeManager.int32_type || target_type == TypeManager.uint32_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.Int:
+ case BuiltinTypeSpec.Type.UInt:
return expr == null ? EmptyExpression.Null : EmptyCast.Create (expr, target_type);
-
- if (target_type == TypeManager.uint64_type)
+ case BuiltinTypeSpec.Type.ULong:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_U8);
- if (target_type == TypeManager.int64_type)
+ case BuiltinTypeSpec.Type.Long:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_I8);
- if (target_type == TypeManager.double_type)
+ case BuiltinTypeSpec.Type.Double:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_R8);
- if (target_type == TypeManager.float_type)
+ case BuiltinTypeSpec.Type.Float:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_R4);
- if (target_type == TypeManager.decimal_type)
- return expr == null ? EmptyExpression.Null : new CastToDecimal (expr);
- } else if (expr_type == TypeManager.int32_type){
+ case BuiltinTypeSpec.Type.Decimal:
+ return expr == null ? EmptyExpression.Null : new OperatorCast (expr, target_type);
+ }
+ break;
+ case BuiltinTypeSpec.Type.Int:
//
// From int to long, float, double, decimal
//
- if (target_type == TypeManager.int64_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.Long:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_I8);
- if (target_type == TypeManager.double_type)
+ case BuiltinTypeSpec.Type.Double:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_R8);
- if (target_type == TypeManager.float_type)
+ case BuiltinTypeSpec.Type.Float:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_R4);
- if (target_type == TypeManager.decimal_type)
- return expr == null ? EmptyExpression.Null : new CastToDecimal (expr);
- } else if (expr_type == TypeManager.uint32_type){
+ case BuiltinTypeSpec.Type.Decimal:
+ return expr == null ? EmptyExpression.Null : new OperatorCast (expr, target_type);
+ }
+ break;
+ case BuiltinTypeSpec.Type.UInt:
//
// From uint to long, ulong, float, double, decimal
//
- if (target_type == TypeManager.int64_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.Long:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_U8);
- if (target_type == TypeManager.uint64_type)
+ case BuiltinTypeSpec.Type.ULong:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_U8);
- if (target_type == TypeManager.double_type)
- return expr == null ? EmptyExpression.Null : new OpcodeCast (new OpcodeCast (expr, target_type, OpCodes.Conv_R_Un), target_type, OpCodes.Conv_R8);
- if (target_type == TypeManager.float_type)
- return expr == null ? EmptyExpression.Null : new OpcodeCast (new OpcodeCast (expr, target_type, OpCodes.Conv_R_Un), target_type, OpCodes.Conv_R4);
- if (target_type == TypeManager.decimal_type)
- return expr == null ? EmptyExpression.Null : new CastToDecimal (expr);
- } else if (expr_type == TypeManager.int64_type){
+ case BuiltinTypeSpec.Type.Double:
+ return expr == null ? EmptyExpression.Null : new OpcodeCastDuplex (expr, target_type, OpCodes.Conv_R_Un, OpCodes.Conv_R8);
+ case BuiltinTypeSpec.Type.Float:
+ return expr == null ? EmptyExpression.Null : new OpcodeCastDuplex (expr, target_type, OpCodes.Conv_R_Un, OpCodes.Conv_R4);
+ case BuiltinTypeSpec.Type.Decimal:
+ return expr == null ? EmptyExpression.Null : new OperatorCast (expr, target_type);
+ }
+ break;
+ case BuiltinTypeSpec.Type.Long:
//
- // From long/ulong to float, double
+ // From long to float, double, decimal
//
- if (target_type == TypeManager.double_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.Double:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_R8);
- if (target_type == TypeManager.float_type)
+ case BuiltinTypeSpec.Type.Float:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_R4);
- if (target_type == TypeManager.decimal_type)
- return expr == null ? EmptyExpression.Null : new CastToDecimal (expr);
- } else if (expr_type == TypeManager.uint64_type){
- //
- // From ulong to float, double
- //
- if (target_type == TypeManager.double_type)
- return expr == null ? EmptyExpression.Null : new OpcodeCast (new OpcodeCast (expr, target_type, OpCodes.Conv_R_Un), target_type, OpCodes.Conv_R8);
- if (target_type == TypeManager.float_type)
- return expr == null ? EmptyExpression.Null : new OpcodeCast (new OpcodeCast (expr, target_type, OpCodes.Conv_R_Un), target_type, OpCodes.Conv_R4);
- if (target_type == TypeManager.decimal_type)
- return expr == null ? EmptyExpression.Null : new CastToDecimal (expr);
- } else if (expr_type == TypeManager.char_type){
+ case BuiltinTypeSpec.Type.Decimal:
+ return expr == null ? EmptyExpression.Null : new OperatorCast (expr, target_type);
+ }
+ break;
+ case BuiltinTypeSpec.Type.ULong:
+ //
+ // From ulong to float, double, decimal
+ //
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.Double:
+ return expr == null ? EmptyExpression.Null : new OpcodeCastDuplex (expr, target_type, OpCodes.Conv_R_Un, OpCodes.Conv_R8);
+ case BuiltinTypeSpec.Type.Float:
+ return expr == null ? EmptyExpression.Null : new OpcodeCastDuplex (expr, target_type, OpCodes.Conv_R_Un, OpCodes.Conv_R4);
+ case BuiltinTypeSpec.Type.Decimal:
+ return expr == null ? EmptyExpression.Null : new OperatorCast (expr, target_type);
+ }
+ break;
+ case BuiltinTypeSpec.Type.Char:
//
// From char to ushort, int, uint, long, ulong, float, double, decimal
//
- if ((target_type == TypeManager.ushort_type) ||
- (target_type == TypeManager.int32_type) ||
- (target_type == TypeManager.uint32_type))
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.UShort:
+ case BuiltinTypeSpec.Type.Int:
+ case BuiltinTypeSpec.Type.UInt:
return expr == null ? EmptyExpression.Null : EmptyCast.Create (expr, target_type);
- if (target_type == TypeManager.uint64_type)
+ case BuiltinTypeSpec.Type.ULong:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_U8);
- if (target_type == TypeManager.int64_type)
+ case BuiltinTypeSpec.Type.Long:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_I8);
- if (target_type == TypeManager.float_type)
+ case BuiltinTypeSpec.Type.Float:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_R4);
- if (target_type == TypeManager.double_type)
+ case BuiltinTypeSpec.Type.Double:
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_R8);
- if (target_type == TypeManager.decimal_type)
- return expr == null ? EmptyExpression.Null : new CastToDecimal (expr);
- } else if (expr_type == TypeManager.float_type){
+ case BuiltinTypeSpec.Type.Decimal:
+ return expr == null ? EmptyExpression.Null : new OperatorCast (expr, target_type);
+ }
+ break;
+ case BuiltinTypeSpec.Type.Float:
//
// float to double
//
- if (target_type == TypeManager.double_type)
+ if (target_type.BuiltinType == BuiltinTypeSpec.Type.Double)
return expr == null ? EmptyExpression.Null : new OpcodeCast (expr, target_type, OpCodes.Conv_R8);
+ break;
}
return null;
}
- /// <summary>
- /// Same as ImplicitStandardConversionExists except that it also looks at
- /// implicit user defined conversions - needed for overload resolution
- /// </summary>
+ //
+ // Full version of implicit conversion
+ //
public static bool ImplicitConversionExists (ResolveContext ec, Expression expr, TypeSpec target_type)
{
if (ImplicitStandardConversionExists (expr, target_type))
return true;
if (expr.Type == InternalType.AnonymousMethod) {
- if (!TypeManager.IsDelegateType (target_type) && target_type.GetDefinition () != TypeManager.expression_type)
+ if (!target_type.IsDelegate && !target_type.IsExpressionTreeType)
return false;
AnonymousMethodExpression ame = (AnonymousMethodExpression) expr;
}
if (expr.eclass == ExprClass.MethodGroup) {
- if (target_type.IsDelegate && RootContext.Version != LanguageVersion.ISO_1) {
+ if (target_type.IsDelegate && ec.Module.Compiler.Settings.Version != LanguageVersion.ISO_1) {
MethodGroupExpr mg = expr as MethodGroupExpr;
if (mg != null)
return DelegateCreation.ImplicitStandardConversionExists (ec, mg, target_type);
return false;
}
+ // Conversion from __arglist to System.ArgIterator
+ if (expr.Type == InternalType.Arglist)
+ return target_type == ec.Module.PredefinedTypes.ArgIterator.TypeSpec;
+
return ImplicitUserConversion (ec, expr, target_type, Location.Null) != null;
}
- /// <summary>
- /// Determines if a standard implicit conversion exists from
- /// expr_type to target_type
- ///
- /// ec should point to a real EmitContext if expr.Type is TypeManager.anonymous_method_type.
- /// </summary>
+ //
+ // Implicit standard conversion (only core conversions are used here)
+ //
public static bool ImplicitStandardConversionExists (Expression expr, TypeSpec target_type)
{
- TypeSpec expr_type = expr.Type;
-
- if (expr_type == TypeManager.null_type) {
- NullLiteral nl = expr as NullLiteral;
- if (nl != null)
- return nl.ConvertImplicitly (null, target_type) != null;
- }
+ //
+ // Identity conversions
+ // Implicit numeric conversions
+ // Implicit nullable conversions
+ // Implicit reference conversions
+ // Boxing conversions
+ // Implicit constant expression conversions
+ // Implicit conversions involving type parameters
+ //
- if (expr_type == TypeManager.void_type)
- return false;
+ TypeSpec expr_type = expr.Type;
- if (TypeManager.IsEqual (expr_type, target_type))
+ if (expr_type == target_type)
return true;
- if (TypeManager.IsNullableType (target_type)) {
+ if (target_type.IsNullableType)
return ImplicitNulableConversion (null, expr, target_type) != null;
- }
- // First numeric conversions
if (ImplicitNumericConversion (null, expr_type, target_type) != null)
return true;
- if (ImplicitReferenceConversionExists (expr, target_type))
+ if (ImplicitReferenceConversionExists (expr_type, target_type, false))
return true;
if (ImplicitBoxingConversion (null, expr_type, target_type) != null)
return true;
-
+
//
// Implicit Constant Expression Conversions
//
if (expr is IntConstant){
int value = ((IntConstant) expr).Value;
-
- if (target_type == TypeManager.sbyte_type){
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.SByte:
if (value >= SByte.MinValue && value <= SByte.MaxValue)
return true;
- } else if (target_type == TypeManager.byte_type){
+ break;
+ case BuiltinTypeSpec.Type.Byte:
if (value >= 0 && value <= Byte.MaxValue)
return true;
- } else if (target_type == TypeManager.short_type){
+ break;
+ case BuiltinTypeSpec.Type.Short:
if (value >= Int16.MinValue && value <= Int16.MaxValue)
return true;
- } else if (target_type == TypeManager.ushort_type){
+ break;
+ case BuiltinTypeSpec.Type.UShort:
if (value >= UInt16.MinValue && value <= UInt16.MaxValue)
return true;
- } else if (target_type == TypeManager.uint32_type){
+ break;
+ case BuiltinTypeSpec.Type.UInt:
if (value >= 0)
return true;
- } else if (target_type == TypeManager.uint64_type){
+ break;
+ case BuiltinTypeSpec.Type.ULong:
//
// we can optimize this case: a positive int32
// always fits on a uint64. But we need an opcode
//
if (value >= 0)
return true;
+
+ break;
}
}
- if (expr is LongConstant && target_type == TypeManager.uint64_type){
+ if (expr is LongConstant && target_type.BuiltinType == BuiltinTypeSpec.Type.ULong){
//
// Try the implicit constant expression conversion
// from long to ulong, instead of a nice routine,
return true;
}
- if (expr is IntegralConstant && TypeManager.IsEnumType (target_type)) {
+ if (expr is IntegralConstant && target_type.IsEnum) {
var i = (IntegralConstant) expr;
//
// LAMESPEC: csc allows any constant like 0 values to be converted, including const float f = 0.0
return i.IsZeroInteger;
}
+ // Implicit dynamic conversion
+ if (expr_type.BuiltinType == BuiltinTypeSpec.Type.Dynamic) {
+ switch (target_type.Kind) {
+ case MemberKind.ArrayType:
+ case MemberKind.Class:
+ case MemberKind.Struct:
+ case MemberKind.Delegate:
+ case MemberKind.Enum:
+ case MemberKind.Interface:
+ case MemberKind.TypeParameter:
+ return true;
+ }
+
+ // dynamic to __arglist
+ if (target_type == InternalType.Arglist)
+ return true;
+
+ return false;
+ }
+
+ //
+ // In an unsafe context implicit conversions is extended to include
+ //
+ // From any pointer-type to the type void*
+ // From the null literal to any pointer-type.
//
- // If `expr_type' implements `target_type' (which is an iface)
- // see TryImplicitIntConversion
+ // LAMESPEC: The specification claims this conversion is allowed in implicit conversion but
+ // in reality implicit standard conversion uses it
//
- if (target_type.IsInterface && expr_type.ImplementsInterface (target_type))
+ if (target_type.IsPointer && expr.Type.IsPointer && ((PointerContainer) target_type).Element.Kind == MemberKind.Void)
return true;
- if (target_type == TypeManager.void_ptr_type && expr_type.IsPointer)
+ //
+ // Struct identity conversion, including dynamic erasure
+ //
+ if (expr_type.IsStruct && TypeSpecComparer.IsEqual (expr_type, target_type))
return true;
- // Conversion from __arglist to System.ArgIterator
- if (expr_type == InternalType.Arglist)
- return target_type == TypeManager.arg_iterator_type;
-
return false;
}
/// Finds "most encompassed type" according to the spec (13.4.2)
/// amongst the methods in the MethodGroupExpr
/// </summary>
- public static TypeSpec FindMostEncompassedType (IEnumerable<TypeSpec> types)
+ public static TypeSpec FindMostEncompassedType (IList<TypeSpec> types)
{
TypeSpec best = null;
- EmptyExpression expr = EmptyExpression.Grab ();
+ EmptyExpression expr;
foreach (TypeSpec t in types) {
if (best == null) {
continue;
}
- expr.SetType (t);
+ expr = new EmptyExpression (t);
if (ImplicitStandardConversionExists (expr, best))
best = t;
}
- expr.SetType (best);
+ expr = new EmptyExpression (best);
foreach (TypeSpec t in types) {
if (best == t)
continue;
}
}
- EmptyExpression.Release (expr);
-
return best;
}
- /// <summary>
- /// Finds "most encompassing type" according to the spec (13.4.2)
- /// amongst the types in the given set
- /// </summary>
+ //
+ // Finds the most encompassing type (type into which all other
+ // types can convert to) amongst the types in the given set
+ //
static TypeSpec FindMostEncompassingType (IList<TypeSpec> types)
{
- TypeSpec best = null;
-
if (types.Count == 0)
return null;
if (types.Count == 1)
return types [0];
- EmptyExpression expr = EmptyExpression.Grab ();
+ TypeSpec best = null;
+ for (int i = 0; i < types.Count; ++i) {
+ int ii = 0;
+ for (; ii < types.Count; ++ii) {
+ if (ii == i)
+ continue;
- foreach (TypeSpec t in types) {
- if (best == null) {
- best = t;
- continue;
+ var expr = new EmptyExpression (types[ii]);
+ if (!ImplicitStandardConversionExists (expr, types [i])) {
+ ii = 0;
+ break;
+ }
}
- expr.SetType (best);
- if (ImplicitStandardConversionExists (expr, t))
- best = t;
- }
+ if (ii == 0)
+ continue;
- foreach (TypeSpec t in types) {
- if (best == t)
+ if (best == null) {
+ best = types[i];
continue;
- expr.SetType (t);
- if (!ImplicitStandardConversionExists (expr, best)) {
- best = null;
- break;
}
- }
- EmptyExpression.Release (expr);
+ // Indicates multiple best types
+ return InternalType.FakeInternalType;
+ }
return best;
}
- /// <summary>
- /// Finds the most specific source Sx according to the rules of the spec (13.4.4)
- /// by making use of FindMostEncomp* methods. Applies the correct rules separately
- /// for explicit and implicit conversion operators.
- /// </summary>
- static TypeSpec FindMostSpecificSource (IList<MethodSpec> list,
- Expression source, bool apply_explicit_conv_rules)
+ //
+ // Finds the most specific source Sx according to the rules of the spec (13.4.4)
+ // by making use of FindMostEncomp* methods. Applies the correct rules separately
+ // for explicit and implicit conversion operators.
+ //
+ static TypeSpec FindMostSpecificSource (List<MethodSpec> list, TypeSpec sourceType, Expression source, bool apply_explicit_conv_rules)
{
- var src_types_set = new List<TypeSpec> ();
+ var src_types_set = new TypeSpec [list.Count];
//
- // If any operator converts from S then Sx = S
+ // Try exact match first, if any operator converts from S then Sx = S
//
- TypeSpec source_type = source.Type;
- foreach (var mb in list){
- TypeSpec param_type = mb.Parameters.Types [0];
+ for (int i = 0; i < src_types_set.Length; ++i) {
+ TypeSpec param_type = list [i].Parameters.Types [0];
- if (param_type == source_type)
+ if (param_type == sourceType)
return param_type;
- src_types_set.Add (param_type);
+ src_types_set [i] = param_type;
}
//
if (apply_explicit_conv_rules) {
var candidate_set = new List<TypeSpec> ();
- EmptyExpression expr = EmptyExpression.Grab ();
-
- foreach (TypeSpec ret_type in tgt_types_set){
- expr.SetType (ret_type);
+ foreach (TypeSpec ret_type in tgt_types_set) {
+ var expr = new EmptyExpression (ret_type);
if (ImplicitStandardConversionExists (expr, target))
candidate_set.Add (ret_type);
}
- EmptyExpression.Release (expr);
-
if (candidate_set.Count != 0)
return FindMostEncompassingType (candidate_set);
}
static void FindApplicableUserDefinedConversionOperators (IList<MemberSpec> operators, Expression source, TypeSpec target, bool implicitOnly, ref List<MethodSpec> candidates)
{
- //
- // LAMESPEC: Undocumented IntPtr/UIntPtr conversions
- // IntPtr -> uint uses int
- // UIntPtr -> long uses ulong
- //
- if (source.Type == TypeManager.intptr_type) {
- if (target == TypeManager.uint32_type)
- target = TypeManager.int32_type;
- } else if (source.Type == TypeManager.uintptr_type) {
- if (target == TypeManager.int64_type)
- target = TypeManager.uint64_type;
+ if (source.Type.IsInterface) {
+ // Neither A nor B are interface-types
+ return;
}
// For a conversion operator to be applicable, it must be possible
t = op.ReturnType;
- // LAMESPEC: Exclude UIntPtr -> int conversion
- if (t == TypeManager.uint32_type && source.Type == TypeManager.uintptr_type)
+ if (t.IsInterface)
continue;
- if (target != t && !ImplicitStandardConversionExists (new EmptyExpression (t), target)) {
- if (implicitOnly)
- continue;
+ if (target != t) {
+ if (t.IsNullableType)
+ t = Nullable.NullableInfo.GetUnderlyingType (t);
- if (texpr == null)
- texpr = new EmptyExpression (target);
+ if (!ImplicitStandardConversionExists (new EmptyExpression (t), target)) {
+ if (implicitOnly)
+ continue;
- if (!ImplicitStandardConversionExists (texpr, t))
- continue;
+ if (texpr == null)
+ texpr = new EmptyExpression (target);
+
+ if (!ImplicitStandardConversionExists (texpr, t))
+ continue;
+ }
}
if (candidates == null)
List<MethodSpec> candidates = null;
//
- // If S or T are nullable types, S0 and T0 are their underlying types
- // otherwise S0 and T0 are equal to S and T respectively.
+ // If S or T are nullable types, source_type and target_type are their underlying types
+ // otherwise source_type and target_type are equal to S and T respectively.
//
TypeSpec source_type = source.Type;
TypeSpec target_type = target;
- Expression unwrap;
+ Expression source_type_expr;
- if (TypeManager.IsNullableType (source_type)) {
+ if (source_type.IsNullableType) {
// No implicit conversion S? -> T for non-reference types
- if (implicitOnly && !TypeManager.IsReferenceType (target_type) && !TypeManager.IsNullableType (target_type))
+ if (implicitOnly && !TypeSpec.IsReferenceType (target_type) && !target_type.IsNullableType)
return null;
- unwrap = source = Nullable.Unwrap.Create (source);
- source_type = source.Type;
+ source_type_expr = Nullable.Unwrap.Create (source);
+ source_type = source_type_expr.Type;
} else {
- unwrap = null;
+ source_type_expr = source;
}
- if (TypeManager.IsNullableType (target_type))
+ if (target_type.IsNullableType)
target_type = Nullable.NullableInfo.GetUnderlyingType (target_type);
// Only these containers can contain a user defined implicit or explicit operators
const MemberKind user_conversion_kinds = MemberKind.Class | MemberKind.Struct | MemberKind.TypeParameter;
- if ((source_type.Kind & user_conversion_kinds) != 0 && source_type != TypeManager.decimal_type) {
+ if ((source_type.Kind & user_conversion_kinds) != 0 && source_type.BuiltinType != BuiltinTypeSpec.Type.Decimal) {
bool declared_only = source_type.IsStruct;
var operators = MemberCache.GetUserOperator (source_type, Operator.OpType.Implicit, declared_only);
if (operators != null) {
- FindApplicableUserDefinedConversionOperators (operators, source, target_type, implicitOnly, ref candidates);
+ FindApplicableUserDefinedConversionOperators (operators, source_type_expr, target_type, implicitOnly, ref candidates);
}
if (!implicitOnly) {
operators = MemberCache.GetUserOperator (source_type, Operator.OpType.Explicit, declared_only);
if (operators != null) {
- FindApplicableUserDefinedConversionOperators (operators, source, target_type, false, ref candidates);
+ FindApplicableUserDefinedConversionOperators (operators, source_type_expr, target_type, false, ref candidates);
}
}
}
- if ((target.Kind & user_conversion_kinds) != 0 && target != TypeManager.decimal_type) {
+ if ((target.Kind & user_conversion_kinds) != 0 && target_type.BuiltinType != BuiltinTypeSpec.Type.Decimal) {
bool declared_only = target.IsStruct || implicitOnly;
var operators = MemberCache.GetUserOperator (target_type, Operator.OpType.Implicit, declared_only);
if (operators != null) {
- FindApplicableUserDefinedConversionOperators (operators, source, target_type, implicitOnly, ref candidates);
+ FindApplicableUserDefinedConversionOperators (operators, source_type_expr, target_type, implicitOnly, ref candidates);
}
if (!implicitOnly) {
operators = MemberCache.GetUserOperator (target_type, Operator.OpType.Explicit, declared_only);
if (operators != null) {
- FindApplicableUserDefinedConversionOperators (operators, source, target_type, false, ref candidates);
+ FindApplicableUserDefinedConversionOperators (operators, source_type_expr, target_type, false, ref candidates);
}
}
}
s_x = most_specific_operator.Parameters.Types[0];
t_x = most_specific_operator.ReturnType;
} else {
- s_x = FindMostSpecificSource (candidates, source, !implicitOnly);
+ //
+ // Pass original source type to find the best match against input type and
+ // not the unwrapped expression
+ //
+ s_x = FindMostSpecificSource (candidates, source.Type, source_type_expr, !implicitOnly);
if (s_x == null)
return null;
if (t_x == null)
return null;
- most_specific_operator = candidates[0];
-
- for (int i = 1; i < candidates.Count; ++i) {
+ most_specific_operator = null;
+ for (int i = 0; i < candidates.Count; ++i) {
if (candidates[i].ReturnType == t_x && candidates[i].Parameters.Types[0] == s_x) {
most_specific_operator = candidates[i];
break;
}
}
+
+ if (most_specific_operator == null) {
+ MethodSpec ambig_arg = null;
+ foreach (var candidate in candidates) {
+ if (candidate.ReturnType == t_x)
+ most_specific_operator = candidate;
+ else if (candidate.Parameters.Types[0] == s_x)
+ ambig_arg = candidate;
+ }
+
+ ec.Report.Error (457, loc,
+ "Ambiguous user defined operators `{0}' and `{1}' when converting from `{2}' to `{3}'",
+ ambig_arg.GetSignatureForError (), most_specific_operator.GetSignatureForError (),
+ source.Type.GetSignatureForError (), target.GetSignatureForError ());
+
+ return ErrorExpression.Instance;
+ }
}
//
// Convert input type when it's different to best operator argument
//
- if (s_x != source.Type)
- source = implicitOnly ?
- ImplicitConversionStandard (ec, source, s_x, loc) :
- ExplicitConversionStandard (ec, source, s_x, loc);
+ if (s_x != source_type) {
+ var c = source as Constant;
+ if (c != null) {
+ source = c.TryReduce (ec, s_x, loc);
+ } else {
+ source = implicitOnly ?
+ ImplicitConversionStandard (ec, source_type_expr, s_x, loc) :
+ ExplicitConversionStandard (ec, source_type_expr, s_x, loc);
+ }
+ } else {
+ source = source_type_expr;
+ }
source = new UserCast (most_specific_operator, source, loc).Resolve (ec);
//
// User operator is of T?, no need to lift it
//
- if (TypeManager.IsNullableType (t_x) && t_x == target)
+ if (t_x == target && t_x.IsNullableType)
return source;
source = implicitOnly ?
ImplicitConversionStandard (ec, source, target_type, loc) :
ExplicitConversionStandard (ec, source, target_type, loc);
+
+ if (source == null)
+ return null;
}
//
- // Source expression is of nullable type, lift the result in case of it's null
+ // Source expression is of nullable type, lift the result in the case it's null and
+ // not nullable/lifted user operator is used
//
- if (unwrap != null && (TypeManager.IsReferenceType (target) || target_type != target))
- source = new Nullable.Lifted (source, unwrap, target).Resolve (ec);
+ if (source_type_expr is Nullable.Unwrap && !s_x.IsNullableType && (TypeSpec.IsReferenceType (target) || target_type != target))
+ source = new Nullable.Lifted (source, source_type_expr, target).Resolve (ec);
else if (target_type != target)
source = Nullable.Wrap.Create (source, target);
static Expression ImplicitConversionStandard (ResolveContext ec, Expression expr, TypeSpec target_type, Location loc, bool explicit_cast)
{
if (expr.eclass == ExprClass.MethodGroup){
- if (!TypeManager.IsDelegateType (target_type)){
+ if (!target_type.IsDelegate){
return null;
}
//
// Only allow anonymous method conversions on post ISO_1
//
- if (RootContext.Version != LanguageVersion.ISO_1){
+ if (ec.Module.Compiler.Settings.Version != LanguageVersion.ISO_1){
MethodGroupExpr mg = expr as MethodGroupExpr;
if (mg != null)
return ImplicitDelegateCreation.Create (
TypeSpec expr_type = expr.Type;
Expression e;
- if (expr_type.Equals (target_type)) {
- if (expr_type != TypeManager.null_type && expr_type != InternalType.AnonymousMethod)
+ if (expr_type == target_type) {
+ if (expr_type != InternalType.NullLiteral && expr_type != InternalType.AnonymousMethod)
return expr;
return null;
}
- if (TypeSpecComparer.Variant.IsEqual (expr_type, target_type)) {
- return expr;
+ if (expr_type.BuiltinType == BuiltinTypeSpec.Type.Dynamic) {
+ switch (target_type.Kind) {
+ case MemberKind.ArrayType:
+ case MemberKind.Class:
+ if (target_type.BuiltinType == BuiltinTypeSpec.Type.Object)
+ return EmptyCast.Create (expr, target_type);
+
+ goto case MemberKind.Struct;
+ case MemberKind.Struct:
+ case MemberKind.Delegate:
+ case MemberKind.Enum:
+ case MemberKind.Interface:
+ case MemberKind.TypeParameter:
+ Arguments args = new Arguments (1);
+ args.Add (new Argument (expr));
+ return new DynamicConversion (target_type, explicit_cast ? CSharpBinderFlags.ConvertExplicit : 0, args, loc).Resolve (ec);
+ }
+
+ return null;
}
- if (TypeManager.IsNullableType (target_type))
+ if (target_type.IsNullableType)
return ImplicitNulableConversion (ec, expr, target_type);
//
Constant c = expr as Constant;
if (c != null) {
try {
- c = c.ConvertImplicitly (ec, target_type);
+ c = c.ConvertImplicitly (target_type);
} catch {
Console.WriteLine ("Conversion error happened in line {0}", loc);
throw;
if (e != null)
return e;
- if (expr is IntegralConstant && TypeManager.IsEnumType (target_type)){
+ e = ImplicitBoxingConversion (expr, expr_type, target_type);
+ if (e != null)
+ return e;
+
+ if (expr is IntegralConstant && target_type.IsEnum){
var i = (IntegralConstant) expr;
//
// LAMESPEC: csc allows any constant like 0 values to be converted, including const float f = 0.0
//
if (i.IsZeroInteger) {
// Recreate 0 literal to remove any collected conversions
- return new EnumConstant (new IntLiteral (0, i.Location), target_type).Resolve (ec);
+ return new EnumConstant (new IntLiteral (ec.BuiltinTypes, 0, i.Location), target_type);
}
}
if (ec.IsUnsafe) {
- if (expr_type.IsPointer){
- if (target_type == TypeManager.void_ptr_type)
- return EmptyCast.Create (expr, target_type);
-
- //
- // yep, comparing pointer types cant be done with
- // t1 == t2, we have to compare their element types.
- //
- if (target_type.IsPointer){
- if (TypeManager.GetElementType(target_type) == TypeManager.GetElementType(expr_type))
+ var target_pc = target_type as PointerContainer;
+ if (target_pc != null) {
+ if (expr_type.IsPointer) {
+ //
+ // Pointer types are same when they have same element types
+ //
+ if (expr_type == target_pc)
return expr;
+ if (target_pc.Element.Kind == MemberKind.Void)
+ return EmptyCast.Create (expr, target_type);
+
//return null;
}
- }
- if (expr_type == TypeManager.null_type && target_type.IsPointer)
- return EmptyCast.Create (new NullPointer (loc), target_type);
+ if (expr_type == InternalType.NullLiteral)
+ return new NullPointer (target_type, loc);
+ }
}
if (expr_type == InternalType.AnonymousMethod){
return am.Resolve (ec);
}
- if (expr_type == InternalType.Arglist && target_type == TypeManager.arg_iterator_type)
+ if (expr_type == InternalType.Arglist && target_type == ec.Module.PredefinedTypes.ArgIterator.TypeSpec)
return expr;
+ //
+ // dynamic erasure conversion on value types
+ //
+ if (expr_type.IsStruct && TypeSpecComparer.IsEqual (expr_type, target_type))
+ return expr_type == target_type ? expr : EmptyCast.Create (expr, target_type);
+
return null;
}
if (e != null)
return e;
- if (source.Type == InternalType.Dynamic) {
- Arguments args = new Arguments (1);
- args.Add (new Argument (source));
- return new DynamicConversion (target_type, 0, args, loc).Resolve (ec);
- }
-
source.Error_ValueCannotBeConverted (ec, loc, target_type, false);
return null;
}
/// Int16->UIntPtr
///
/// </summary>
- public static Expression ExplicitNumericConversion (Expression expr, TypeSpec target_type)
+ public static Expression ExplicitNumericConversion (ResolveContext rc, Expression expr, TypeSpec target_type)
{
- TypeSpec expr_type = expr.Type;
- TypeSpec real_target_type = target_type;
+ // Not all predefined explicit numeric conversion are
+ // defined here, for some of them (mostly IntPtr/UIntPtr) we
+ // defer to user-operator handling which is now perfect but
+ // works for now
+ //
+ // LAMESPEC: Undocumented IntPtr/UIntPtr conversions
+ // IntPtr -> uint uses int
+ // UIntPtr -> long uses ulong
+ //
- if (expr_type == TypeManager.sbyte_type){
+ switch (expr.Type.BuiltinType) {
+ case BuiltinTypeSpec.Type.SByte:
//
// From sbyte to byte, ushort, uint, ulong, char, uintptr
//
- if (real_target_type == TypeManager.byte_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.Byte:
return new ConvCast (expr, target_type, ConvCast.Mode.I1_U1);
- if (real_target_type == TypeManager.ushort_type)
+ case BuiltinTypeSpec.Type.UShort:
return new ConvCast (expr, target_type, ConvCast.Mode.I1_U2);
- if (real_target_type == TypeManager.uint32_type)
+ case BuiltinTypeSpec.Type.UInt:
return new ConvCast (expr, target_type, ConvCast.Mode.I1_U4);
- if (real_target_type == TypeManager.uint64_type)
+ case BuiltinTypeSpec.Type.ULong:
return new ConvCast (expr, target_type, ConvCast.Mode.I1_U8);
- if (real_target_type == TypeManager.char_type)
+ case BuiltinTypeSpec.Type.Char:
return new ConvCast (expr, target_type, ConvCast.Mode.I1_CH);
// One of the built-in conversions that belonged in the class library
- if (real_target_type == TypeManager.uintptr_type){
- Expression u8e = new ConvCast (expr, TypeManager.uint64_type, ConvCast.Mode.I1_U8);
-
- return new OperatorCast (u8e, TypeManager.uintptr_type, true);
+ case BuiltinTypeSpec.Type.UIntPtr:
+ return new OperatorCast (new ConvCast (expr, rc.BuiltinTypes.ULong, ConvCast.Mode.I1_U8), target_type, target_type, true);
}
- } else if (expr_type == TypeManager.byte_type){
+ break;
+ case BuiltinTypeSpec.Type.Byte:
//
// From byte to sbyte and char
//
- if (real_target_type == TypeManager.sbyte_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.SByte:
return new ConvCast (expr, target_type, ConvCast.Mode.U1_I1);
- if (real_target_type == TypeManager.char_type)
+ case BuiltinTypeSpec.Type.Char:
return new ConvCast (expr, target_type, ConvCast.Mode.U1_CH);
- } else if (expr_type == TypeManager.short_type){
+ }
+ break;
+ case BuiltinTypeSpec.Type.Short:
//
// From short to sbyte, byte, ushort, uint, ulong, char, uintptr
//
- if (real_target_type == TypeManager.sbyte_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.SByte:
return new ConvCast (expr, target_type, ConvCast.Mode.I2_I1);
- if (real_target_type == TypeManager.byte_type)
+ case BuiltinTypeSpec.Type.Byte:
return new ConvCast (expr, target_type, ConvCast.Mode.I2_U1);
- if (real_target_type == TypeManager.ushort_type)
+ case BuiltinTypeSpec.Type.UShort:
return new ConvCast (expr, target_type, ConvCast.Mode.I2_U2);
- if (real_target_type == TypeManager.uint32_type)
+ case BuiltinTypeSpec.Type.UInt:
return new ConvCast (expr, target_type, ConvCast.Mode.I2_U4);
- if (real_target_type == TypeManager.uint64_type)
+ case BuiltinTypeSpec.Type.ULong:
return new ConvCast (expr, target_type, ConvCast.Mode.I2_U8);
- if (real_target_type == TypeManager.char_type)
+ case BuiltinTypeSpec.Type.Char:
return new ConvCast (expr, target_type, ConvCast.Mode.I2_CH);
// One of the built-in conversions that belonged in the class library
- if (real_target_type == TypeManager.uintptr_type){
- Expression u8e = new ConvCast (expr, TypeManager.uint64_type, ConvCast.Mode.I2_U8);
-
- return new OperatorCast (u8e, TypeManager.uintptr_type, true);
+ case BuiltinTypeSpec.Type.UIntPtr:
+ return new OperatorCast (new ConvCast (expr, rc.BuiltinTypes.ULong, ConvCast.Mode.I2_U8), target_type, target_type, true);
}
- } else if (expr_type == TypeManager.ushort_type){
+ break;
+ case BuiltinTypeSpec.Type.UShort:
//
// From ushort to sbyte, byte, short, char
//
- if (real_target_type == TypeManager.sbyte_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.SByte:
return new ConvCast (expr, target_type, ConvCast.Mode.U2_I1);
- if (real_target_type == TypeManager.byte_type)
+ case BuiltinTypeSpec.Type.Byte:
return new ConvCast (expr, target_type, ConvCast.Mode.U2_U1);
- if (real_target_type == TypeManager.short_type)
+ case BuiltinTypeSpec.Type.Short:
return new ConvCast (expr, target_type, ConvCast.Mode.U2_I2);
- if (real_target_type == TypeManager.char_type)
+ case BuiltinTypeSpec.Type.Char:
return new ConvCast (expr, target_type, ConvCast.Mode.U2_CH);
- } else if (expr_type == TypeManager.int32_type){
+ }
+ break;
+ case BuiltinTypeSpec.Type.Int:
//
// From int to sbyte, byte, short, ushort, uint, ulong, char, uintptr
//
- if (real_target_type == TypeManager.sbyte_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.SByte:
return new ConvCast (expr, target_type, ConvCast.Mode.I4_I1);
- if (real_target_type == TypeManager.byte_type)
+ case BuiltinTypeSpec.Type.Byte:
return new ConvCast (expr, target_type, ConvCast.Mode.I4_U1);
- if (real_target_type == TypeManager.short_type)
+ case BuiltinTypeSpec.Type.Short:
return new ConvCast (expr, target_type, ConvCast.Mode.I4_I2);
- if (real_target_type == TypeManager.ushort_type)
+ case BuiltinTypeSpec.Type.UShort:
return new ConvCast (expr, target_type, ConvCast.Mode.I4_U2);
- if (real_target_type == TypeManager.uint32_type)
+ case BuiltinTypeSpec.Type.UInt:
return new ConvCast (expr, target_type, ConvCast.Mode.I4_U4);
- if (real_target_type == TypeManager.uint64_type)
+ case BuiltinTypeSpec.Type.ULong:
return new ConvCast (expr, target_type, ConvCast.Mode.I4_U8);
- if (real_target_type == TypeManager.char_type)
+ case BuiltinTypeSpec.Type.Char:
return new ConvCast (expr, target_type, ConvCast.Mode.I4_CH);
// One of the built-in conversions that belonged in the class library
- if (real_target_type == TypeManager.uintptr_type){
- Expression u8e = new ConvCast (expr, TypeManager.uint64_type, ConvCast.Mode.I2_U8);
-
- return new OperatorCast (u8e, TypeManager.uintptr_type, true);
+ case BuiltinTypeSpec.Type.UIntPtr:
+ return new OperatorCast (new ConvCast (expr, rc.BuiltinTypes.ULong, ConvCast.Mode.I2_U8), target_type, target_type, true);
}
- } else if (expr_type == TypeManager.uint32_type){
+ break;
+ case BuiltinTypeSpec.Type.UInt:
//
// From uint to sbyte, byte, short, ushort, int, char
//
- if (real_target_type == TypeManager.sbyte_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.SByte:
return new ConvCast (expr, target_type, ConvCast.Mode.U4_I1);
- if (real_target_type == TypeManager.byte_type)
+ case BuiltinTypeSpec.Type.Byte:
return new ConvCast (expr, target_type, ConvCast.Mode.U4_U1);
- if (real_target_type == TypeManager.short_type)
+ case BuiltinTypeSpec.Type.Short:
return new ConvCast (expr, target_type, ConvCast.Mode.U4_I2);
- if (real_target_type == TypeManager.ushort_type)
+ case BuiltinTypeSpec.Type.UShort:
return new ConvCast (expr, target_type, ConvCast.Mode.U4_U2);
- if (real_target_type == TypeManager.int32_type)
+ case BuiltinTypeSpec.Type.Int:
return new ConvCast (expr, target_type, ConvCast.Mode.U4_I4);
- if (real_target_type == TypeManager.char_type)
+ case BuiltinTypeSpec.Type.Char:
return new ConvCast (expr, target_type, ConvCast.Mode.U4_CH);
- } else if (expr_type == TypeManager.int64_type){
+ }
+ break;
+ case BuiltinTypeSpec.Type.Long:
//
// From long to sbyte, byte, short, ushort, int, uint, ulong, char
//
- if (real_target_type == TypeManager.sbyte_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.SByte:
return new ConvCast (expr, target_type, ConvCast.Mode.I8_I1);
- if (real_target_type == TypeManager.byte_type)
+ case BuiltinTypeSpec.Type.Byte:
return new ConvCast (expr, target_type, ConvCast.Mode.I8_U1);
- if (real_target_type == TypeManager.short_type)
+ case BuiltinTypeSpec.Type.Short:
return new ConvCast (expr, target_type, ConvCast.Mode.I8_I2);
- if (real_target_type == TypeManager.ushort_type)
+ case BuiltinTypeSpec.Type.UShort:
return new ConvCast (expr, target_type, ConvCast.Mode.I8_U2);
- if (real_target_type == TypeManager.int32_type)
+ case BuiltinTypeSpec.Type.Int:
return new ConvCast (expr, target_type, ConvCast.Mode.I8_I4);
- if (real_target_type == TypeManager.uint32_type)
+ case BuiltinTypeSpec.Type.UInt:
return new ConvCast (expr, target_type, ConvCast.Mode.I8_U4);
- if (real_target_type == TypeManager.uint64_type)
+ case BuiltinTypeSpec.Type.ULong:
return new ConvCast (expr, target_type, ConvCast.Mode.I8_U8);
- if (real_target_type == TypeManager.char_type)
+ case BuiltinTypeSpec.Type.Char:
return new ConvCast (expr, target_type, ConvCast.Mode.I8_CH);
- } else if (expr_type == TypeManager.uint64_type){
+ }
+ break;
+ case BuiltinTypeSpec.Type.ULong:
//
// From ulong to sbyte, byte, short, ushort, int, uint, long, char
//
- if (real_target_type == TypeManager.sbyte_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.SByte:
return new ConvCast (expr, target_type, ConvCast.Mode.U8_I1);
- if (real_target_type == TypeManager.byte_type)
+ case BuiltinTypeSpec.Type.Byte:
return new ConvCast (expr, target_type, ConvCast.Mode.U8_U1);
- if (real_target_type == TypeManager.short_type)
+ case BuiltinTypeSpec.Type.Short:
return new ConvCast (expr, target_type, ConvCast.Mode.U8_I2);
- if (real_target_type == TypeManager.ushort_type)
+ case BuiltinTypeSpec.Type.UShort:
return new ConvCast (expr, target_type, ConvCast.Mode.U8_U2);
- if (real_target_type == TypeManager.int32_type)
+ case BuiltinTypeSpec.Type.Int:
return new ConvCast (expr, target_type, ConvCast.Mode.U8_I4);
- if (real_target_type == TypeManager.uint32_type)
+ case BuiltinTypeSpec.Type.UInt:
return new ConvCast (expr, target_type, ConvCast.Mode.U8_U4);
- if (real_target_type == TypeManager.int64_type)
+ case BuiltinTypeSpec.Type.Long:
return new ConvCast (expr, target_type, ConvCast.Mode.U8_I8);
- if (real_target_type == TypeManager.char_type)
+ case BuiltinTypeSpec.Type.Char:
return new ConvCast (expr, target_type, ConvCast.Mode.U8_CH);
// One of the built-in conversions that belonged in the class library
- if (real_target_type == TypeManager.intptr_type){
- return new OperatorCast (EmptyCast.Create (expr, TypeManager.int64_type),
- TypeManager.intptr_type, true);
+ case BuiltinTypeSpec.Type.IntPtr:
+ return new OperatorCast (EmptyCast.Create (expr, rc.BuiltinTypes.Long), target_type, true);
}
- } else if (expr_type == TypeManager.char_type){
+ break;
+ case BuiltinTypeSpec.Type.Char:
//
// From char to sbyte, byte, short
//
- if (real_target_type == TypeManager.sbyte_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.SByte:
return new ConvCast (expr, target_type, ConvCast.Mode.CH_I1);
- if (real_target_type == TypeManager.byte_type)
+ case BuiltinTypeSpec.Type.Byte:
return new ConvCast (expr, target_type, ConvCast.Mode.CH_U1);
- if (real_target_type == TypeManager.short_type)
+ case BuiltinTypeSpec.Type.Short:
return new ConvCast (expr, target_type, ConvCast.Mode.CH_I2);
- } else if (expr_type == TypeManager.float_type){
+ }
+ break;
+ case BuiltinTypeSpec.Type.Float:
//
// From float to sbyte, byte, short,
// ushort, int, uint, long, ulong, char
// or decimal
//
- if (real_target_type == TypeManager.sbyte_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.SByte:
return new ConvCast (expr, target_type, ConvCast.Mode.R4_I1);
- if (real_target_type == TypeManager.byte_type)
+ case BuiltinTypeSpec.Type.Byte:
return new ConvCast (expr, target_type, ConvCast.Mode.R4_U1);
- if (real_target_type == TypeManager.short_type)
+ case BuiltinTypeSpec.Type.Short:
return new ConvCast (expr, target_type, ConvCast.Mode.R4_I2);
- if (real_target_type == TypeManager.ushort_type)
+ case BuiltinTypeSpec.Type.UShort:
return new ConvCast (expr, target_type, ConvCast.Mode.R4_U2);
- if (real_target_type == TypeManager.int32_type)
+ case BuiltinTypeSpec.Type.Int:
return new ConvCast (expr, target_type, ConvCast.Mode.R4_I4);
- if (real_target_type == TypeManager.uint32_type)
+ case BuiltinTypeSpec.Type.UInt:
return new ConvCast (expr, target_type, ConvCast.Mode.R4_U4);
- if (real_target_type == TypeManager.int64_type)
+ case BuiltinTypeSpec.Type.Long:
return new ConvCast (expr, target_type, ConvCast.Mode.R4_I8);
- if (real_target_type == TypeManager.uint64_type)
+ case BuiltinTypeSpec.Type.ULong:
return new ConvCast (expr, target_type, ConvCast.Mode.R4_U8);
- if (real_target_type == TypeManager.char_type)
+ case BuiltinTypeSpec.Type.Char:
return new ConvCast (expr, target_type, ConvCast.Mode.R4_CH);
- if (real_target_type == TypeManager.decimal_type)
- return new CastToDecimal (expr, true);
- } else if (expr_type == TypeManager.double_type){
+ case BuiltinTypeSpec.Type.Decimal:
+ return new OperatorCast (expr, target_type, true);
+ }
+ break;
+ case BuiltinTypeSpec.Type.Double:
//
// From double to sbyte, byte, short,
// ushort, int, uint, long, ulong,
// char, float or decimal
//
- if (real_target_type == TypeManager.sbyte_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.SByte:
return new ConvCast (expr, target_type, ConvCast.Mode.R8_I1);
- if (real_target_type == TypeManager.byte_type)
+ case BuiltinTypeSpec.Type.Byte:
return new ConvCast (expr, target_type, ConvCast.Mode.R8_U1);
- if (real_target_type == TypeManager.short_type)
+ case BuiltinTypeSpec.Type.Short:
return new ConvCast (expr, target_type, ConvCast.Mode.R8_I2);
- if (real_target_type == TypeManager.ushort_type)
+ case BuiltinTypeSpec.Type.UShort:
return new ConvCast (expr, target_type, ConvCast.Mode.R8_U2);
- if (real_target_type == TypeManager.int32_type)
+ case BuiltinTypeSpec.Type.Int:
return new ConvCast (expr, target_type, ConvCast.Mode.R8_I4);
- if (real_target_type == TypeManager.uint32_type)
+ case BuiltinTypeSpec.Type.UInt:
return new ConvCast (expr, target_type, ConvCast.Mode.R8_U4);
- if (real_target_type == TypeManager.int64_type)
+ case BuiltinTypeSpec.Type.Long:
return new ConvCast (expr, target_type, ConvCast.Mode.R8_I8);
- if (real_target_type == TypeManager.uint64_type)
+ case BuiltinTypeSpec.Type.ULong:
return new ConvCast (expr, target_type, ConvCast.Mode.R8_U8);
- if (real_target_type == TypeManager.char_type)
+ case BuiltinTypeSpec.Type.Char:
return new ConvCast (expr, target_type, ConvCast.Mode.R8_CH);
- if (real_target_type == TypeManager.float_type)
+ case BuiltinTypeSpec.Type.Float:
return new ConvCast (expr, target_type, ConvCast.Mode.R8_R4);
- if (real_target_type == TypeManager.decimal_type)
- return new CastToDecimal (expr, true);
- } else if (expr_type == TypeManager.uintptr_type){
+ case BuiltinTypeSpec.Type.Decimal:
+ return new OperatorCast (expr, target_type, true);
+ }
+ break;
+ case BuiltinTypeSpec.Type.UIntPtr:
//
// Various built-in conversions that belonged in the class library
//
// from uintptr to sbyte, short, int32
//
- if (real_target_type == TypeManager.sbyte_type){
- Expression uint32e = new OperatorCast (expr, TypeManager.uint32_type, true);
- return new ConvCast (uint32e, TypeManager.sbyte_type, ConvCast.Mode.U4_I1);
- }
- if (real_target_type == TypeManager.short_type){
- Expression uint32e = new OperatorCast (expr, TypeManager.uint32_type, true);
- return new ConvCast (uint32e, TypeManager.sbyte_type, ConvCast.Mode.U4_I2);
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.SByte:
+ return new ConvCast (new OperatorCast (expr, expr.Type, rc.BuiltinTypes.UInt, true), target_type, ConvCast.Mode.U4_I1);
+ case BuiltinTypeSpec.Type.Short:
+ return new ConvCast (new OperatorCast (expr, expr.Type, rc.BuiltinTypes.UInt, true), target_type, ConvCast.Mode.U4_I2);
+ case BuiltinTypeSpec.Type.Int:
+ return EmptyCast.Create (new OperatorCast (expr, expr.Type, rc.BuiltinTypes.UInt, true), target_type);
+ case BuiltinTypeSpec.Type.UInt:
+ return new OperatorCast (expr, expr.Type, target_type, true);
+ case BuiltinTypeSpec.Type.Long:
+ return EmptyCast.Create (new OperatorCast (expr, expr.Type, rc.BuiltinTypes.ULong, true), target_type);
}
- if (real_target_type == TypeManager.int32_type){
- return EmptyCast.Create (new OperatorCast (expr, TypeManager.uint32_type, true),
- TypeManager.int32_type);
- }
- } else if (expr_type == TypeManager.intptr_type){
- if (real_target_type == TypeManager.uint64_type){
- return EmptyCast.Create (new OperatorCast (expr, TypeManager.int64_type, true),
- TypeManager.uint64_type);
+ break;
+ case BuiltinTypeSpec.Type.IntPtr:
+ if (target_type.BuiltinType == BuiltinTypeSpec.Type.UInt)
+ return EmptyCast.Create (new OperatorCast (expr, expr.Type, rc.BuiltinTypes.Int, true), target_type);
+ if (target_type.BuiltinType == BuiltinTypeSpec.Type.ULong)
+ return EmptyCast.Create (new OperatorCast (expr, expr.Type, rc.BuiltinTypes.Long, true), target_type);
+
+ break;
+ case BuiltinTypeSpec.Type.Decimal:
+ // From decimal to sbyte, byte, short,
+ // ushort, int, uint, long, ulong, char,
+ // float, or double
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.SByte:
+ case BuiltinTypeSpec.Type.Byte:
+ case BuiltinTypeSpec.Type.Short:
+ case BuiltinTypeSpec.Type.UShort:
+ case BuiltinTypeSpec.Type.Int:
+ case BuiltinTypeSpec.Type.UInt:
+ case BuiltinTypeSpec.Type.Long:
+ case BuiltinTypeSpec.Type.ULong:
+ case BuiltinTypeSpec.Type.Char:
+ case BuiltinTypeSpec.Type.Float:
+ case BuiltinTypeSpec.Type.Double:
+ return new OperatorCast (expr, expr.Type, target_type, true);
}
- } else if (expr_type == TypeManager.decimal_type) {
- return new CastFromDecimal (expr, target_type).Resolve ();
+
+ break;
}
+
return null;
}
//
// From object to a generic parameter
//
- if (source_type == TypeManager.object_type && TypeManager.IsGenericParameter (target_type))
+ if (source_type.BuiltinType == BuiltinTypeSpec.Type.Object && TypeManager.IsGenericParameter (target_type))
return source == null ? EmptyExpression.Null : new UnboxCast (source, target_type);
//
if (source_type.Kind == MemberKind.TypeParameter)
return ExplicitTypeParameterConversion (source, source_type, target_type);
- bool target_is_value_type = TypeManager.IsStruct (target_type) || TypeManager.IsEnumType (target_type);
+ bool target_is_value_type = target_type.Kind == MemberKind.Struct || target_type.Kind == MemberKind.Enum;
//
// Unboxing conversion from System.ValueType to any non-nullable-value-type
//
- if (source_type == TypeManager.value_type && target_is_value_type)
+ if (source_type.BuiltinType == BuiltinTypeSpec.Type.ValueType && target_is_value_type)
return source == null ? EmptyExpression.Null : new UnboxCast (source, target_type);
//
- // From object to any reference type or value type (unboxing)
+ // From object or dynamic to any reference type or value type (unboxing)
//
- if (source_type == TypeManager.object_type)
+ if (source_type.BuiltinType == BuiltinTypeSpec.Type.Object || source_type.BuiltinType == BuiltinTypeSpec.Type.Dynamic) {
+ if (target_type.IsPointer)
+ return null;
+
return
source == null ? EmptyExpression.Null :
target_is_value_type ? new UnboxCast (source, target_type) :
source is Constant ? (Expression) new EmptyConstantCast ((Constant) source, target_type) :
new ClassCast (source, target_type);
+ }
//
// From any class S to any class-type T, provided S is a base class of T
//
- if (TypeManager.IsSubclassOf (target_type, source_type))
+ if (source_type.Kind == MemberKind.Class && TypeSpec.IsBaseClass (target_type, source_type, true))
return source == null ? EmptyExpression.Null : new ClassCast (source, target_type);
//
// From any interface-type S to to any class type T, provided T is not
// sealed, or provided T implements S.
//
- if (source_type.IsInterface) {
- if (!target_type.IsSealed || target_type.ImplementsInterface (source_type)) {
- if (target_type.IsClass)
- return source == null ? EmptyExpression.Null : new ClassCast (source, target_type);
+ if (source_type.Kind == MemberKind.Interface) {
+ if (!target_type.IsSealed || target_type.ImplementsInterface (source_type, true)) {
+ if (source == null)
+ return EmptyExpression.Null;
//
// Unboxing conversion from any interface-type to any non-nullable-value-type that
// implements the interface-type
//
- return source == null ? EmptyExpression.Null : new UnboxCast (source, target_type);
+ return target_is_value_type ? new UnboxCast (source, target_type) : (Expression) new ClassCast (source, target_type);
}
//
//
// From System.Array to any array-type
//
- if (source_type == TypeManager.array_type)
+ if (source_type.BuiltinType == BuiltinTypeSpec.Type.Array)
return source == null ? EmptyExpression.Null : new ClassCast (source, target_type);
//
if (source_array.Rank == target_array.Rank) {
source_type = source_array.Element;
- if (!TypeManager.IsReferenceType (source_type))
+ if (!TypeSpec.IsReferenceType (source_type))
return null;
var target_element = target_array.Element;
- if (!TypeManager.IsReferenceType (target_element))
+ if (!TypeSpec.IsReferenceType (target_element))
return null;
if (ExplicitReferenceConversionExists (source_type, target_element))
// From any class type S to any interface T, provides S is not sealed
// and provided S does not implement T.
//
- if (target_type.IsInterface && !source_type.IsSealed && !source_type.ImplementsInterface (target_type)) {
+ if (target_type.IsInterface && !source_type.IsSealed && !source_type.ImplementsInterface (target_type, true)) {
return source == null ? EmptyExpression.Null : new ClassCast (source, target_type);
}
//
// From System delegate to any delegate-type
//
- if (source_type == TypeManager.delegate_type && TypeManager.IsDelegateType (target_type))
+ if (source_type.BuiltinType == BuiltinTypeSpec.Type.Delegate && target_type.IsDelegate)
return source == null ? EmptyExpression.Null : new ClassCast (source, target_type);
+ //
+ // From variant generic delegate to same variant generic delegate type
+ //
+ if (source_type.IsDelegate && target_type.IsDelegate && source_type.MemberDefinition == target_type.MemberDefinition) {
+ var tparams = source_type.MemberDefinition.TypeParameters;
+ var targs_src = source_type.TypeArguments;
+ var targs_dst = target_type.TypeArguments;
+ int i;
+ for (i = 0; i < tparams.Length; ++i) {
+ //
+ // If TP is invariant, types have to be identical
+ //
+ if (TypeSpecComparer.IsEqual (targs_src[i], targs_dst[i]))
+ continue;
+
+ if (tparams[i].Variance == Variance.Covariant) {
+ //
+ //If TP is covariant, an implicit or explicit identity or reference conversion is required
+ //
+ if (ImplicitReferenceConversionExists (targs_src[i], targs_dst[i]))
+ continue;
+
+ if (ExplicitReferenceConversionExists (targs_src[i], targs_dst[i]))
+ continue;
+
+ } else if (tparams[i].Variance == Variance.Contravariant) {
+ //
+ //If TP is contravariant, both are either identical or reference types
+ //
+ if (TypeSpec.IsReferenceType (targs_src[i]) && TypeSpec.IsReferenceType (targs_dst[i]))
+ continue;
+ }
+
+ break;
+ }
+
+ if (i == tparams.Length)
+ return source == null ? EmptyExpression.Null : new ClassCast (source, target_type);
+ }
+
return null;
}
if (ne != null)
return ne;
- if (TypeManager.IsEnumType (expr_type)) {
- TypeSpec real_target = TypeManager.IsEnumType (target_type) ? EnumSpec.GetUnderlyingType (target_type) : target_type;
+ if (expr_type.IsEnum) {
+ TypeSpec real_target = target_type.IsEnum ? EnumSpec.GetUnderlyingType (target_type) : target_type;
Expression underlying = EmptyCast.Create (expr, EnumSpec.GetUnderlyingType (expr_type));
if (underlying.Type == real_target)
ne = underlying;
ne = ImplicitNumericConversion (underlying, real_target);
if (ne == null)
- ne = ExplicitNumericConversion (underlying, real_target);
+ ne = ExplicitNumericConversion (ec, underlying, real_target);
//
// LAMESPEC: IntPtr and UIntPtr conversion to any Enum is allowed
//
- if (ne == null && (real_target == TypeManager.intptr_type || real_target == TypeManager.uintptr_type))
+ if (ne == null && (real_target.BuiltinType == BuiltinTypeSpec.Type.IntPtr || real_target.BuiltinType == BuiltinTypeSpec.Type.UIntPtr))
ne = ExplicitUserConversion (ec, underlying, real_target, loc);
return ne != null ? EmptyCast.Create (ne, target_type) : null;
}
- if (TypeManager.IsEnumType (target_type)) {
+ if (target_type.IsEnum) {
//
// System.Enum can be unboxed to any enum-type
//
- if (expr_type == TypeManager.enum_type)
+ if (expr_type.BuiltinType == BuiltinTypeSpec.Type.Enum)
return new UnboxCast (expr, target_type);
- TypeSpec real_target = TypeManager.IsEnumType (target_type) ? EnumSpec.GetUnderlyingType (target_type) : target_type;
+ TypeSpec real_target = target_type.IsEnum ? EnumSpec.GetUnderlyingType (target_type) : target_type;
if (expr_type == real_target)
return EmptyCast.Create (expr, target_type);
if (ne != null)
return EmptyCast.Create (ne, target_type);
- ne = ExplicitNumericConversion (expr, real_target);
+ ne = ExplicitNumericConversion (ec, expr, real_target);
if (ne != null)
return EmptyCast.Create (ne, target_type);
//
// LAMESPEC: IntPtr and UIntPtr conversion to any Enum is allowed
//
- if (expr_type == TypeManager.intptr_type || expr_type == TypeManager.uintptr_type) {
+ if (expr_type.BuiltinType == BuiltinTypeSpec.Type.IntPtr || expr_type.BuiltinType == BuiltinTypeSpec.Type.UIntPtr) {
ne = ExplicitUserConversion (ec, expr, real_target, loc);
if (ne != null)
return ExplicitConversionCore (ec, ne, target_type, loc);
}
} else {
- ne = ExplicitNumericConversion (expr, target_type);
+ ne = ExplicitNumericConversion (ec, expr, target_type);
if (ne != null)
return ne;
}
// from Null to a ValueType, and ExplicitReference wont check against
// null literal explicitly
//
- if (expr_type != TypeManager.null_type){
+ if (expr_type != InternalType.NullLiteral) {
ne = ExplicitReferenceConversion (expr, expr_type, target_type);
if (ne != null)
return ne;
if (expr_type.IsPointer)
return EmptyCast.Create (expr, target_type);
- if (expr_type == TypeManager.sbyte_type ||
- expr_type == TypeManager.short_type ||
- expr_type == TypeManager.int32_type)
+ switch (expr_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.SByte:
+ case BuiltinTypeSpec.Type.Short:
+ case BuiltinTypeSpec.Type.Int:
return new OpcodeCast (expr, target_type, OpCodes.Conv_I);
- if (expr_type == TypeManager.ushort_type ||
- expr_type == TypeManager.uint32_type ||
- expr_type == TypeManager.byte_type)
+ case BuiltinTypeSpec.Type.UShort:
+ case BuiltinTypeSpec.Type.UInt:
+ case BuiltinTypeSpec.Type.Byte:
return new OpcodeCast (expr, target_type, OpCodes.Conv_U);
- if (expr_type == TypeManager.int64_type)
+ case BuiltinTypeSpec.Type.Long:
return new ConvCast (expr, target_type, ConvCast.Mode.I8_I);
- if (expr_type == TypeManager.uint64_type)
+ case BuiltinTypeSpec.Type.ULong:
return new ConvCast (expr, target_type, ConvCast.Mode.U8_I);
+ }
}
if (expr_type.IsPointer){
- if (target_type == TypeManager.sbyte_type)
+ switch (target_type.BuiltinType) {
+ case BuiltinTypeSpec.Type.SByte:
return new OpcodeCast (expr, target_type, OpCodes.Conv_I1);
- if (target_type == TypeManager.byte_type)
+ case BuiltinTypeSpec.Type.Byte:
return new OpcodeCast (expr, target_type, OpCodes.Conv_U1);
- if (target_type == TypeManager.short_type)
+ case BuiltinTypeSpec.Type.Short:
return new OpcodeCast (expr, target_type, OpCodes.Conv_I2);
- if (target_type == TypeManager.ushort_type)
+ case BuiltinTypeSpec.Type.UShort:
return new OpcodeCast (expr, target_type, OpCodes.Conv_U2);
- if (target_type == TypeManager.int32_type)
+ case BuiltinTypeSpec.Type.Int:
return new OpcodeCast (expr, target_type, OpCodes.Conv_I4);
- if (target_type == TypeManager.uint32_type)
+ case BuiltinTypeSpec.Type.UInt:
return new OpcodeCast (expr, target_type, OpCodes.Conv_U4);
- if (target_type == TypeManager.int64_type)
+ case BuiltinTypeSpec.Type.Long:
return new ConvCast (expr, target_type, ConvCast.Mode.I_I8);
- if (target_type == TypeManager.uint64_type)
+ case BuiltinTypeSpec.Type.ULong:
return new OpcodeCast (expr, target_type, OpCodes.Conv_U8);
+ }
}
return null;
}
if (ne != null)
return ne;
- ne = ExplicitNumericConversion (expr, target_type);
+ ne = ExplicitNumericConversion (ec, expr, target_type);
if (ne != null)
return ne;
if (ne != null)
return ne;
- if (ec.IsUnsafe && expr.Type == TypeManager.void_ptr_type && target_type.IsPointer)
+ if (ec.IsUnsafe && expr.Type.IsPointer && target_type.IsPointer && ((PointerContainer)expr.Type).Element.Kind == MemberKind.Void)
return EmptyCast.Create (expr, target_type);
expr.Error_ValueCannotBeConverted (ec, l, target_type, true);
// Don't eliminate explicit precission casts
//
if (e == expr) {
- if (target_type == TypeManager.float_type)
+ if (target_type.BuiltinType == BuiltinTypeSpec.Type.Float)
return new OpcodeCast (expr, target_type, OpCodes.Conv_R4);
- if (target_type == TypeManager.double_type)
+ if (target_type.BuiltinType == BuiltinTypeSpec.Type.Double)
return new OpcodeCast (expr, target_type, OpCodes.Conv_R8);
}
}
TypeSpec expr_type = expr.Type;
- if (TypeManager.IsNullableType (target_type)) {
- if (TypeManager.IsNullableType (expr_type)) {
- TypeSpec target = Nullable.NullableInfo.GetUnderlyingType (target_type);
+ if (target_type.IsNullableType) {
+ TypeSpec target;
+
+ if (expr_type.IsNullableType) {
+ target = Nullable.NullableInfo.GetUnderlyingType (target_type);
Expression unwrap = Nullable.Unwrap.Create (expr);
e = ExplicitConversion (ec, unwrap, target, expr.Location);
if (e == null)
return null;
return new Nullable.Lifted (e, unwrap, target_type).Resolve (ec);
- } else if (expr_type == TypeManager.object_type) {
+ }
+ if (expr_type.BuiltinType == BuiltinTypeSpec.Type.Object) {
return new UnboxCast (expr, target_type);
- } else {
- TypeSpec target = TypeManager.GetTypeArguments (target_type) [0];
-
- e = ExplicitConversionCore (ec, expr, target, loc);
- if (e != null)
- return Nullable.Wrap.Create (e, target_type);
}
- } else if (TypeManager.IsNullableType (expr_type)) {
+
+ target = TypeManager.GetTypeArguments (target_type) [0];
+ e = ExplicitConversionCore (ec, expr, target, loc);
+ if (e != null)
+ return Nullable.Wrap.Create (e, target_type);
+ } else if (expr_type.IsNullableType) {
e = ImplicitBoxingConversion (expr, Nullable.NullableInfo.GetUnderlyingType (expr_type), target_type);
if (e != null)
return e;
projects / mono.git / blobdiff