//
// Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
// Copyright 2003-2008 Novell, Inc.
+// Copyright 2011 Xamarin Inc
//
//
using System;
+using System.Text;
+
+#if STATIC
+using MetaType = IKVM.Reflection.Type;
+using IKVM.Reflection;
+using IKVM.Reflection.Emit;
+#else
+using MetaType = System.Type;
using System.Reflection;
using System.Reflection.Emit;
-using System.Text;
-using System.Linq;
+#endif
namespace Mono.CSharp {
}
}
- /// <summary>
- /// Class for applying custom attributes on the implicit parameter type
- /// of the 'set' method in properties, and the 'add' and 'remove' methods in events.
- /// </summary>
- ///
- // TODO: should use more code from Parameter.ApplyAttributeBuilder
- public class ImplicitParameter : ParameterBase {
- public ImplicitParameter (MethodBuilder mb)
- {
- builder = mb.DefineParameter (1, ParameterAttributes.None, "value");
- }
-
- public override AttributeTargets AttributeTargets {
- get {
- return AttributeTargets.Parameter;
- }
- }
-
- /// <summary>
- /// Is never called
- /// </summary>
- public override string[] ValidAttributeTargets {
- get {
- return null;
- }
- }
- }
-
public class ImplicitLambdaParameter : Parameter
{
public ImplicitLambdaParameter (string name, Location loc)
var ac = parameter_type as ArrayContainer;
if (ac == null || ac.Rank != 1) {
- ec.Compiler.Report.Error (225, Location, "The params parameter must be a single dimensional array");
+ ec.Module.Compiler.Report.Error (225, Location, "The params parameter must be a single dimensional array");
return null;
}
[Flags]
public enum Modifier : byte {
NONE = 0,
- REF = REFMASK | ISBYREF,
- OUT = OUTMASK | ISBYREF,
- PARAMS = 4,
- // This is a flag which says that it's either REF or OUT.
- ISBYREF = 8,
- REFMASK = 32,
- OUTMASK = 64,
- This = 128
+ PARAMS = 1 << 0,
+ REF = 1 << 1,
+ OUT = 1 << 2,
+ This = 1 << 3,
+ CallerMemberName = 1 << 4,
+ CallerLineNumber = 1 << 5,
+ CallerFilePath = 1 << 6,
+
+ RefOutMask = REF | OUT,
+ ModifierMask = PARAMS | REF | OUT | This,
+ CallerMask = CallerMemberName | CallerLineNumber | CallerFilePath
}
- static string[] attribute_targets = new string [] { "param" };
+ static readonly string[] attribute_targets = new string[] { "param" };
FullNamedExpression texpr;
- readonly Modifier modFlags;
+ Modifier modFlags;
string name;
Expression default_expr;
protected TypeSpec parameter_type;
public bool HasAddressTaken;
TemporaryVariableReference expr_tree_variable;
- static TypeExpr parameter_expr_tree_type;
- HoistedVariable hoisted_variant;
+ HoistedParameter hoisted_variant;
public Parameter (FullNamedExpression type, string name, Modifier mod, Attributes attrs, Location loc)
{
#region Properties
- public Expression DefaultValue {
+ public Expression DefaultExpression {
get {
return default_expr;
}
+ }
+
+ public DefaultParameterValueExpression DefaultValue {
+ get {
+ return default_expr as DefaultParameterValueExpression;
+ }
set {
default_expr = value;
}
}
+ Expression IParameterData.DefaultValue {
+ get {
+ var expr = default_expr as DefaultParameterValueExpression;
+ return expr == null ? default_expr : expr.Child;
+ }
+ }
+
+ bool HasOptionalExpression {
+ get {
+ return default_expr is DefaultParameterValueExpression;
+ }
+ }
+
public Location Location {
get {
return loc;
}
}
+ public Modifier ParameterModifier {
+ get {
+ return modFlags;
+ }
+ }
+
public TypeSpec Type {
get {
return parameter_type;
}
+ set {
+ parameter_type = value;
+ }
}
public FullNamedExpression TypeExpression {
return;
}
- if (a.Type == pa.Out && (ModFlags & Modifier.REF) == Modifier.REF &&
+ if (a.Type == pa.Out && (ModFlags & Modifier.REF) != 0 &&
!OptAttributes.Contains (pa.In)) {
a.Report.Error (662, a.Location,
"Cannot specify only `Out' attribute on a ref parameter. Use both `In' and `Out' attributes or neither");
if (a.Type == pa.CLSCompliant) {
a.Report.Warning (3022, 1, a.Location, "CLSCompliant attribute has no meaning when applied to parameters. Try putting it on the method instead");
- }
-
- if (HasDefaultValue && (a.Type == pa.DefaultParameterValue || a.Type == pa.OptionalParameter)) {
- a.Report.Error (1745, a.Location,
- "Cannot specify `{0}' attribute on optional parameter `{1}'",
- TypeManager.CSharpName (a.Type).Replace ("Attribute", ""), Name);
- return;
- }
-
- if (a.Type == pa.DefaultParameterValue) {
- TypeSpec arg_type;
- var c = a.GetParameterDefaultValue (out arg_type);
- if (c == null) {
- if (parameter_type == TypeManager.object_type) {
- a.Report.Error (1910, a.Location, "Argument of type `{0}' is not applicable for the DefaultParameterValue attribute",
- arg_type.GetSignatureForError ());
- } else {
- a.Report.Error (1909, a.Location, "The DefaultParameterValue attribute is not applicable on parameters of type `{0}'",
- parameter_type.GetSignatureForError ()); ;
- }
+ } else if (a.Type == pa.DefaultParameterValue || a.Type == pa.OptionalParameter) {
+ if (HasOptionalExpression) {
+ a.Report.Error (1745, a.Location,
+ "Cannot specify `{0}' attribute on optional parameter `{1}'",
+ TypeManager.CSharpName (a.Type).Replace ("Attribute", ""), Name);
+ }
+ if (a.Type == pa.DefaultParameterValue)
return;
+ } else if (a.Type == pa.CallerMemberNameAttribute) {
+ if ((modFlags & Modifier.CallerMemberName) == 0) {
+ a.Report.Error (4022, a.Location,
+ "The CallerMemberName attribute can only be applied to parameters with default value");
+ }
+ } else if (a.Type == pa.CallerLineNumberAttribute) {
+ if ((modFlags & Modifier.CallerLineNumber) == 0) {
+ a.Report.Error (4020, a.Location,
+ "The CallerLineNumber attribute can only be applied to parameters with default value");
+ }
+ } else if (a.Type == pa.CallerFilePathAttribute) {
+ if ((modFlags & Modifier.CallerFilePath) == 0) {
+ a.Report.Error (4021, a.Location,
+ "The CallerFilePath attribute can only be applied to parameters with default value");
}
-
- if (arg_type == parameter_type || parameter_type == TypeManager.object_type ||
- (c.IsNull && TypeManager.IsReferenceType (parameter_type) && !TypeManager.IsGenericParameter (parameter_type)))
- builder.SetConstant (c.GetValue ());
- else
- a.Report.Error (1908, a.Location, "The type of the default value should match the type of the parameter");
-
- return;
}
base.ApplyAttributeBuilder (a, ctor, cdata, pa);
return member.IsAccessibleAs (parameter_type);
}
- public static void Reset ()
- {
- parameter_expr_tree_type = null;
- }
-
// <summary>
// Resolve is used in method definitions
// </summary>
if (attributes != null)
attributes.AttachTo (this, rc);
- var expr = texpr.ResolveAsTypeTerminal (rc, false);
- if (expr == null)
+ parameter_type = texpr.ResolveAsType (rc);
+ if (parameter_type == null)
return null;
this.idx = index;
- texpr = expr;
- parameter_type = texpr.Type;
-
- if ((modFlags & Parameter.Modifier.ISBYREF) != 0 &&
- TypeManager.IsSpecialType (parameter_type)) {
- rc.Compiler.Report.Error (1601, Location, "Method or delegate parameter cannot be of type `{0}'",
+
+ if ((modFlags & Parameter.Modifier.RefOutMask) != 0 && parameter_type.IsSpecialRuntimeType) {
+ rc.Module.Compiler.Report.Error (1601, Location, "Method or delegate parameter cannot be of type `{0}'",
GetSignatureForError ());
return null;
}
TypeManager.CheckTypeVariance (parameter_type,
- (modFlags & Parameter.Modifier.ISBYREF) != 0 ? Variance.None : Variance.Contravariant,
+ (modFlags & Parameter.Modifier.RefOutMask) != 0 ? Variance.None : Variance.Contravariant,
rc);
if (parameter_type.IsStatic) {
- rc.Compiler.Report.Error (721, Location, "`{0}': static types cannot be used as parameters",
+ rc.Module.Compiler.Report.Error (721, Location, "`{0}': static types cannot be used as parameters",
texpr.GetSignatureForError ());
return parameter_type;
}
- if ((modFlags & Modifier.This) != 0 && (parameter_type.IsPointer || parameter_type == InternalType.Dynamic)) {
- rc.Compiler.Report.Error (1103, Location, "The extension method cannot be of type `{0}'",
+ if ((modFlags & Modifier.This) != 0 && (parameter_type.IsPointer || parameter_type.BuiltinType == BuiltinTypeSpec.Type.Dynamic)) {
+ rc.Module.Compiler.Report.Error (1103, Location, "The extension method cannot be of type `{0}'",
TypeManager.CSharpName (parameter_type));
}
return parameter_type;
}
+ void ResolveCallerAttributes (ResolveContext rc)
+ {
+ var pa = rc.Module.PredefinedAttributes;
+ TypeSpec caller_type;
+
+ foreach (var attr in attributes.Attrs) {
+ var atype = attr.ResolveType ();
+ if (atype == null)
+ continue;
+
+ if (atype == pa.CallerMemberNameAttribute) {
+ caller_type = rc.BuiltinTypes.String;
+ if (caller_type != parameter_type && !Convert.ImplicitReferenceConversionExists (caller_type, parameter_type)) {
+ rc.Report.Error (4019, attr.Location,
+ "The CallerMemberName attribute cannot be applied because there is no standard conversion from `{0}' to `{1}'",
+ caller_type.GetSignatureForError (), parameter_type.GetSignatureForError ());
+ }
+
+ modFlags |= Modifier.CallerMemberName;
+ continue;
+ }
+
+ if (atype == pa.CallerLineNumberAttribute) {
+ caller_type = rc.BuiltinTypes.Int;
+ if (caller_type != parameter_type && !Convert.ImplicitNumericConversionExists (caller_type, parameter_type)) {
+ rc.Report.Error (4017, attr.Location,
+ "The CallerMemberName attribute cannot be applied because there is no standard conversion from `{0}' to `{1}'",
+ caller_type.GetSignatureForError (), parameter_type.GetSignatureForError ());
+ }
+
+ modFlags |= Modifier.CallerLineNumber;
+ continue;
+ }
+
+ if (atype == pa.CallerFilePathAttribute) {
+ caller_type = rc.BuiltinTypes.String;
+ if (caller_type != parameter_type && !Convert.ImplicitReferenceConversionExists (caller_type, parameter_type)) {
+ rc.Report.Error (4018, attr.Location,
+ "The CallerFilePath attribute cannot be applied because there is no standard conversion from `{0}' to `{1}'",
+ caller_type.GetSignatureForError (), parameter_type.GetSignatureForError ());
+ }
+
+ modFlags |= Modifier.CallerFilePath;
+ continue;
+ }
+ }
+ }
+
public void ResolveDefaultValue (ResolveContext rc)
{
//
// Default value was specified using an expression
//
if (default_expr != null) {
- default_expr = ResolveDefaultExpression (rc);
+ ((DefaultParameterValueExpression)default_expr).Resolve (rc, this);
+ if (attributes != null)
+ ResolveCallerAttributes (rc);
+
return;
}
if (attributes == null)
return;
-
- var pa = attributes.Search (rc.Compiler.PredefinedAttributes.OptionalParameter);
- if (pa == null)
- return;
-
- //
- // Default value was specified using an attribute
- //
- attributes.Attrs.Remove (pa);
-
- TypeSpec expr_type = null;
- pa = attributes.Search (rc.Compiler.PredefinedAttributes.DefaultParameterValue);
- if (pa != null) {
- attributes.Attrs.Remove (pa);
- default_expr = pa.GetParameterDefaultValue (out expr_type);
- } else {
- default_expr = EmptyExpression.MissingValue;
- }
-
- if (default_expr == null) {
- if (expr_type == null)
- expr_type = parameter_type;
-
- default_expr = new DefaultValueExpression (new TypeExpression (expr_type, Location), Location);
- }
- default_expr = default_expr.Resolve (rc);
- }
-
- Expression ResolveDefaultExpression (ResolveContext rc)
- {
- default_expr = default_expr.Resolve (rc);
- if (default_expr == null)
- return null;
+ var pa = rc.Module.PredefinedAttributes;
+ var def_attr = attributes.Search (pa.DefaultParameterValue);
+ if (def_attr != null) {
+ if (def_attr.Resolve () == null)
+ return;
- if (!(default_expr is Constant || default_expr is DefaultValueExpression || (default_expr is New && ((New)default_expr).IsDefaultStruct))) {
- rc.Compiler.Report.Error (1736, default_expr.Location,
- "The expression being assigned to optional parameter `{0}' must be a constant or default value",
- Name);
+ var default_expr_attr = def_attr.GetParameterDefaultValue ();
+ if (default_expr_attr == null)
+ return;
- return null;
- }
+ var dpa_rc = def_attr.CreateResolveContext ();
+ default_expr = default_expr_attr.Resolve (dpa_rc);
- if (default_expr.Type == parameter_type)
- return default_expr;
+ if (default_expr is BoxedCast)
+ default_expr = ((BoxedCast) default_expr).Child;
- var res = Convert.ImplicitConversionStandard (rc, default_expr, parameter_type, default_expr.Location);
- if (res != null) {
- if (TypeManager.IsNullableType (parameter_type) && res is Nullable.Wrap) {
- Nullable.Wrap wrap = (Nullable.Wrap) res;
- res = wrap.Child;
- if (!(res is Constant)) {
- rc.Compiler.Report.Error (1770, default_expr.Location,
- "The expression being assigned to nullable optional parameter `{0}' must be default value",
- Name);
- return null;
+ Constant c = default_expr as Constant;
+ if (c == null) {
+ if (parameter_type.BuiltinType == BuiltinTypeSpec.Type.Object) {
+ rc.Report.Error (1910, default_expr.Location,
+ "Argument of type `{0}' is not applicable for the DefaultParameterValue attribute",
+ default_expr.Type.GetSignatureForError ());
+ } else {
+ rc.Report.Error (1909, default_expr.Location,
+ "The DefaultParameterValue attribute is not applicable on parameters of type `{0}'",
+ default_expr.Type.GetSignatureForError ()); ;
}
- }
- if (!default_expr.IsNull && TypeManager.IsReferenceType (parameter_type) && parameter_type != TypeManager.string_type) {
- rc.Compiler.Report.Error (1763, default_expr.Location,
- "Optional parameter `{0}' of type `{1}' can only be initialized with `null'",
- Name, GetSignatureForError ());
+ default_expr = null;
+ return;
+ }
- return null;
+ if (TypeSpecComparer.IsEqual (default_expr.Type, parameter_type) ||
+ (default_expr is NullConstant && TypeSpec.IsReferenceType (parameter_type) && !parameter_type.IsGenericParameter) ||
+ parameter_type.BuiltinType == BuiltinTypeSpec.Type.Object) {
+ return;
}
- return res;
+ //
+ // LAMESPEC: Some really weird csc behaviour which we have to mimic
+ // User operators returning same type as parameter type are considered
+ // valid for this attribute only
+ //
+ // struct S { public static implicit operator S (int i) {} }
+ //
+ // void M ([DefaultParameterValue (3)]S s)
+ //
+ var expr = Convert.ImplicitUserConversion (dpa_rc, default_expr, parameter_type, loc);
+ if (expr != null && TypeSpecComparer.IsEqual (expr.Type, parameter_type)) {
+ return;
+ }
+
+ rc.Report.Error (1908, default_expr.Location, "The type of the default value should match the type of the parameter");
+ return;
}
- rc.Compiler.Report.Error (1750, Location,
- "Optional parameter expression of type `{0}' cannot be converted to parameter type `{1}'",
- TypeManager.CSharpName (default_expr.Type), GetSignatureForError ());
-
- return null;
+ var opt_attr = attributes.Search (pa.OptionalParameter);
+ if (opt_attr != null) {
+ default_expr = EmptyExpression.MissingValue;
+ }
}
public bool HasDefaultValue {
//
// Hoisted parameter variant
//
- public HoistedVariable HoistedVariant {
+ public HoistedParameter HoistedVariant {
get {
return hoisted_variant;
}
set { name = value; }
}
- ParameterAttributes Attributes {
- get { return ParametersCompiled.GetParameterAttribute (modFlags) |
- (HasDefaultValue ? ParameterAttributes.Optional : ParameterAttributes.None); }
- }
-
public override AttributeTargets AttributeTargets {
get {
return AttributeTargets.Parameter;
}
}
+ public void Error_DuplicateName (Report r)
+ {
+ r.Error (100, Location, "The parameter name `{0}' is a duplicate", Name);
+ }
+
public virtual string GetSignatureForError ()
{
string type_name;
if (parameter_type.IsCLSCompliant ())
return;
- ctx.Compiler.Report.Warning (3001, 1, Location,
+ ctx.Module.Compiler.Report.Warning (3001, 1, Location,
"Argument type `{0}' is not CLS-compliant", parameter_type.GetSignatureForError ());
}
if (builder != null)
throw new InternalErrorException ("builder already exists");
+ var pattrs = ParametersCompiled.GetParameterAttribute (modFlags);
+ if (HasOptionalExpression)
+ pattrs |= ParameterAttributes.Optional;
+
if (mb == null)
- builder = cb.DefineParameter (index, Attributes, Name);
+ builder = cb.DefineParameter (index, pattrs, Name);
else
- builder = mb.DefineParameter (index, Attributes, Name);
+ builder = mb.DefineParameter (index, pattrs, Name);
if (OptAttributes != null)
OptAttributes.Emit ();
// Emit constant values for true constants only, the other
// constant-like expressions will rely on default value expression
//
- Constant c = default_expr as Constant;
+ var def_value = DefaultValue;
+ Constant c = def_value != null ? def_value.Child as Constant : default_expr as Constant;
if (c != null) {
- if (default_expr.Type == TypeManager.decimal_type) {
- builder.SetCustomAttribute (Const.CreateDecimalConstantAttribute (c, pa));
+ if (c.Type.BuiltinType == BuiltinTypeSpec.Type.Decimal) {
+ pa.DecimalConstant.EmitAttribute (builder, (decimal) c.GetValue (), c.Location);
} else {
- builder.SetConstant (c.GetTypedValue ());
+ builder.SetConstant (c.GetValue ());
}
+ } else if (default_expr.Type.IsStruct) {
+ //
+ // Handles special case where default expression is used with value-type
+ //
+ // void Foo (S s = default (S)) {}
+ //
+ builder.SetConstant (null);
}
}
if (parameter_type != null) {
- if (parameter_type == InternalType.Dynamic) {
+ if (parameter_type.BuiltinType == BuiltinTypeSpec.Type.Dynamic) {
pa.Dynamic.EmitAttribute (builder);
} else if (parameter_type.HasDynamicElement) {
- pa.Dynamic.EmitAttribute (builder, parameter_type);
+ pa.Dynamic.EmitAttribute (builder, parameter_type, Location);
}
}
}
public ExpressionStatement CreateExpressionTreeVariable (BlockContext ec)
{
- if ((modFlags & Modifier.ISBYREF) != 0)
+ if ((modFlags & Modifier.RefOutMask) != 0)
ec.Report.Error (1951, Location, "An expression tree parameter cannot use `ref' or `out' modifier");
expr_tree_variable = TemporaryVariableReference.Create (ResolveParameterExpressionType (ec, Location).Type, ec.CurrentBlock.ParametersBlock, Location);
expr_tree_variable = (TemporaryVariableReference) expr_tree_variable.Resolve (ec);
Arguments arguments = new Arguments (2);
- arguments.Add (new Argument (new TypeOf (
- new TypeExpression (parameter_type, Location), Location)));
- arguments.Add (new Argument (new StringConstant (Name, Location)));
+ arguments.Add (new Argument (new TypeOf (parameter_type, Location)));
+ arguments.Add (new Argument (new StringConstant (ec.BuiltinTypes, Name, Location)));
return new SimpleAssign (ExpressionTreeVariableReference (),
Expression.CreateExpressionFactoryCall (ec, "Parameter", null, arguments, Location));
}
public void Emit (EmitContext ec)
{
- int arg_idx = idx;
- if (!ec.IsStatic)
- arg_idx++;
-
- ParameterReference.EmitLdArg (ec, arg_idx);
+ ec.EmitArgumentLoad (idx);
}
public void EmitAssign (EmitContext ec)
{
- int arg_idx = idx;
- if (!ec.IsStatic)
- arg_idx++;
-
- if (arg_idx <= 255)
- ec.Emit (OpCodes.Starg_S, (byte) arg_idx);
- else
- ec.Emit (OpCodes.Starg, arg_idx);
+ ec.EmitArgumentStore (idx);
}
public void EmitAddressOf (EmitContext ec)
{
- int arg_idx = idx;
-
- if (!ec.IsStatic)
- arg_idx++;
-
- bool is_ref = (ModFlags & Modifier.ISBYREF) != 0;
- if (is_ref) {
- ParameterReference.EmitLdArg (ec, arg_idx);
+ if ((ModFlags & Modifier.RefOutMask) != 0) {
+ ec.EmitArgumentLoad (idx);
} else {
- if (arg_idx <= 255)
- ec.Emit (OpCodes.Ldarga_S, (byte) arg_idx);
- else
- ec.Emit (OpCodes.Ldarga, arg_idx);
+ ec.EmitArgumentAddress (idx);
}
}
//
public static TypeExpr ResolveParameterExpressionType (IMemberContext ec, Location location)
{
- if (parameter_expr_tree_type != null)
- return parameter_expr_tree_type;
-
- TypeSpec p_type = TypeManager.parameter_expression_type;
- if (p_type == null) {
- p_type = TypeManager.CoreLookupType (ec.Compiler, "System.Linq.Expressions", "ParameterExpression", MemberKind.Class, true);
- TypeManager.parameter_expression_type = p_type;
- }
-
- parameter_expr_tree_type = new TypeExpression (p_type, location).
- ResolveAsTypeTerminal (ec, false);
-
- return parameter_expr_tree_type;
+ TypeSpec p_type = ec.Module.PredefinedTypes.ParameterExpression.Resolve ();
+ return new TypeExpression (p_type, location);
}
public void Warning_UselessOptionalParameter (Report Report)
}
public Parameter.Modifier ModFlags {
- get { return modifiers & ~Parameter.Modifier.This; }
+ get { return modifiers; }
}
public string Name {
public static ParameterAttributes GetParameterAttribute (Parameter.Modifier modFlags)
{
- return (modFlags & Parameter.Modifier.OUT) == Parameter.Modifier.OUT ?
+ return (modFlags & Parameter.Modifier.OUT) != 0 ?
ParameterAttributes.Out : ParameterAttributes.None;
}
// Very expensive operation
- public Type[] GetMetaInfo ()
+ public MetaType[] GetMetaInfo ()
{
- Type[] types;
+ MetaType[] types;
if (has_arglist) {
if (Count == 1)
- return Type.EmptyTypes;
+ return MetaType.EmptyTypes;
- types = new Type [Count - 1];
+ types = new MetaType[Count - 1];
} else {
if (Count == 0)
- return Type.EmptyTypes;
+ return MetaType.EmptyTypes;
- types = new Type [Count];
+ types = new MetaType[Count];
}
for (int i = 0; i < types.Length; ++i) {
types[i] = Types[i].GetMetaInfo ();
- if ((FixedParameters [i].ModFlags & Parameter.Modifier.ISBYREF) == 0)
+ if ((FixedParameters[i].ModFlags & Parameter.Modifier.RefOutMask) == 0)
continue;
// TODO MemberCache: Should go to MetaInfo getter
return -1;
}
+ public string GetSignatureForDocumentation ()
+ {
+ if (IsEmpty)
+ return string.Empty;
+
+ StringBuilder sb = new StringBuilder ("(");
+ for (int i = 0; i < Count; ++i) {
+ if (i != 0)
+ sb.Append (",");
+
+ sb.Append (types [i].GetSignatureForDocumentation ());
+
+ if ((parameters[i].ModFlags & Parameter.Modifier.RefOutMask) != 0)
+ sb.Append ("@");
+ }
+ sb.Append (")");
+
+ return sb.ToString ();
+ }
+
public string GetSignatureForError ()
{
return GetSignatureForError ("(", ")", Count);
// TODO: This does not fit here, it should go to different version of AParametersCollection
// as the underlying type is not Parameter and some methods will fail to cast
//
- public static AParametersCollection CreateFullyResolved (TypeSpec[] types)
+ public static AParametersCollection CreateFullyResolved (params TypeSpec[] types)
{
var pd = new ParameterData [types.Length];
for (int i = 0; i < pd.Length; ++i)
null);
}
+ public void CheckConstraints (IMemberContext mc)
+ {
+ foreach (Parameter p in parameters) {
+ //
+ // It's null for compiler generated types or special types like __arglist
+ //
+ if (p.TypeExpression != null)
+ ConstraintChecker.Check (mc, p.Type, p.TypeExpression.Location);
+ }
+ }
+
//
// Returns non-zero value for equal CLS parameter signatures
//
var a_type = a.Types[i];
var b_type = b.Types[i];
if (TypeSpecComparer.Override.IsEqual (a_type, b_type)) {
- const Parameter.Modifier ref_out = Parameter.Modifier.REF | Parameter.Modifier.OUT;
- if ((a.FixedParameters[i].ModFlags & ref_out) != (b.FixedParameters[i].ModFlags & ref_out))
+ if ((a.FixedParameters[i].ModFlags & Parameter.Modifier.RefOutMask) != (b.FixedParameters[i].ModFlags & Parameter.Modifier.RefOutMask))
res |= 1;
continue;
return parameters;
}
+ //
+ // Parameters checks for members which don't have a block
+ //
+ public void CheckParameters (MemberCore member)
+ {
+ for (int i = 0; i < parameters.Length; ++i) {
+ var name = parameters[i].Name;
+ for (int ii = i + 1; ii < parameters.Length; ++ii) {
+ if (parameters[ii].Name == name)
+ this[ii].Error_DuplicateName (member.Compiler.Report);
+ }
+ }
+ }
+
public bool Resolve (IMemberContext ec)
{
if (types != null)
public void ResolveDefaultValues (MemberCore m)
{
- var count = parameters.Length;
+ ResolveContext rc = null;
+ for (int i = 0; i < parameters.Length; ++i) {
+ Parameter p = (Parameter) parameters [i];
- //
- // Try not to enter default values resolution if there are not any
- //
- if (parameters[count - 1].HasDefaultValue || (HasParams && count > 1 && parameters[count - 2].HasDefaultValue) ||
- ((Parameter) parameters[count - 1]).OptAttributes != null) {
- var rc = new ResolveContext (m);
- for (int i = 0; i < count; ++i) {
- this [i].ResolveDefaultValue (rc);
+ //
+ // Try not to enter default values resolution if there are is not any default value possible
+ //
+ if (p.HasDefaultValue || p.OptAttributes != null) {
+ if (rc == null)
+ rc = new ResolveContext (m);
+
+ p.ResolveDefaultValue (rc);
}
}
}
MethodBuilder mb = builder as MethodBuilder;
ConstructorBuilder cb = builder as ConstructorBuilder;
- var pa = mc.Compiler.PredefinedAttributes;
+ var pa = mc.Module.PredefinedAttributes;
for (int i = 0; i < Count; i++) {
this [i].ApplyAttributes (mb, cb, i + 1, pa);
// Each parameter expression is stored to local variable
// to save some memory when referenced later.
//
- StatementExpression se = new StatementExpression (p.CreateExpressionTreeVariable (ec));
+ StatementExpression se = new StatementExpression (p.CreateExpressionTreeVariable (ec), Location.Null);
if (se.Resolve (ec)) {
ec.CurrentBlock.AddScopeStatement (new TemporaryVariableReference.Declarator (p.ExpressionTreeVariableReference ()));
ec.CurrentBlock.AddScopeStatement (se);
return p;
}
}
+
+ //
+ // Default parameter value expression. We need this wrapper to handle
+ // default parameter values of folded constants (e.g. indexer parameters).
+ // The expression is resolved only once but applied to two methods which
+ // both share reference to this expression and we ensure that resolving
+ // this expression always returns same instance
+ //
+ public class DefaultParameterValueExpression : CompositeExpression
+ {
+ public DefaultParameterValueExpression (Expression expr)
+ : base (expr)
+ {
+ }
+
+ protected override Expression DoResolve (ResolveContext rc)
+ {
+ return base.DoResolve (rc);
+ }
+
+ public void Resolve (ResolveContext rc, Parameter p)
+ {
+ var expr = Resolve (rc);
+ if (expr == null)
+ return;
+
+ expr = Child;
+
+ if (!(expr is Constant || expr is DefaultValueExpression || (expr is New && ((New) expr).IsDefaultStruct))) {
+ rc.Report.Error (1736, Location,
+ "The expression being assigned to optional parameter `{0}' must be a constant or default value",
+ p.Name);
+
+ return;
+ }
+
+ var parameter_type = p.Type;
+ if (type == parameter_type)
+ return;
+
+ var res = Convert.ImplicitConversionStandard (rc, expr, parameter_type, Location);
+ if (res != null) {
+ if (parameter_type.IsNullableType && res is Nullable.Wrap) {
+ Nullable.Wrap wrap = (Nullable.Wrap) res;
+ res = wrap.Child;
+ if (!(res is Constant)) {
+ rc.Report.Error (1770, Location,
+ "The expression being assigned to nullable optional parameter `{0}' must be default value",
+ p.Name);
+ return;
+ }
+ }
+
+ if (!expr.IsNull && TypeSpec.IsReferenceType (parameter_type) && parameter_type.BuiltinType != BuiltinTypeSpec.Type.String) {
+ rc.Report.Error (1763, Location,
+ "Optional parameter `{0}' of type `{1}' can only be initialized with `null'",
+ p.Name, parameter_type.GetSignatureForError ());
+
+ return;
+ }
+
+ this.expr = res;
+ return;
+ }
+
+ rc.Report.Error (1750, Location,
+ "Optional parameter expression of type `{0}' cannot be converted to parameter type `{1}'",
+ type.GetSignatureForError (), parameter_type.GetSignatureForError ());
+ }
+
+ public override object Accept (StructuralVisitor visitor)
+ {
+ return visitor.Visit (this);
+ }
+ }
}
projects / mono.git / blobdiff