//
// Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
// Copyright 2003-2008 Novell, Inc.
+// Copyright 2011 Xamarin Inc
//
//
using System;
[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 readonly string[] attribute_targets = new string[] { "param" };
FullNamedExpression texpr;
- readonly Modifier modFlags;
+ Modifier modFlags;
string name;
Expression default_expr;
protected TypeSpec parameter_type;
TemporaryVariableReference expr_tree_variable;
- HoistedVariable hoisted_variant;
+ HoistedParameter hoisted_variant;
public Parameter (FullNamedExpression type, string name, Modifier mod, Attributes attrs, Location loc)
{
#region Properties
+ public Expression DefaultExpression {
+ get {
+ return default_expr;
+ }
+ }
+
public DefaultParameterValueExpression DefaultValue {
get {
return default_expr as DefaultParameterValueExpression;
}
}
+ 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 (a.Type == pa.DefaultParameterValue || a.Type == pa.OptionalParameter) {
+ } 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}'",
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");
+ }
}
base.ApplyAttributeBuilder (a, ctor, cdata, pa);
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 && parameter_type.IsSpecialRuntimeType) {
+
+ 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) {
return parameter_type;
}
- if ((modFlags & Modifier.This) != 0 && (parameter_type.IsPointer || parameter_type.BuildinType == BuildinTypeSpec.Type.Dynamic)) {
+ 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)
{
//
//
if (default_expr != null) {
((DefaultParameterValueExpression)default_expr).Resolve (rc, this);
+ if (attributes != null)
+ ResolveCallerAttributes (rc);
+
return;
}
if (attributes == null)
return;
-
- var opt_attr = attributes.Search (rc.Module.PredefinedAttributes.OptionalParameter);
- var def_attr = attributes.Search (rc.Module.PredefinedAttributes.DefaultParameterValue);
+
+ var pa = rc.Module.PredefinedAttributes;
+ var def_attr = attributes.Search (pa.DefaultParameterValue);
if (def_attr != null) {
if (def_attr.Resolve () == null)
return;
Constant c = default_expr as Constant;
if (c == null) {
- if (parameter_type.BuildinType == BuildinTypeSpec.Type.Object) {
+ 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 ());
}
if (TypeSpecComparer.IsEqual (default_expr.Type, parameter_type) ||
- (default_expr is NullConstant && TypeManager.IsReferenceType (parameter_type) && !parameter_type.IsGenericParameter) ||
- parameter_type.BuildinType == BuildinTypeSpec.Type.Object) {
+ (default_expr is NullConstant && TypeSpec.IsReferenceType (parameter_type) && !parameter_type.IsGenericParameter) ||
+ parameter_type.BuiltinType == BuiltinTypeSpec.Type.Object) {
return;
}
return;
}
+ var opt_attr = attributes.Search (pa.OptionalParameter);
if (opt_attr != null) {
default_expr = EmptyExpression.MissingValue;
}
//
// Hoisted parameter variant
//
- public HoistedVariable HoistedVariant {
+ public HoistedParameter HoistedVariant {
get {
return hoisted_variant;
}
}
}
+ 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;
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.BuildinType == BuildinTypeSpec.Type.Decimal) {
+ if (c.Type.BuiltinType == BuiltinTypeSpec.Type.Decimal) {
pa.DecimalConstant.EmitAttribute (builder, (decimal) c.GetValue (), c.Location);
} else {
builder.SetConstant (c.GetValue ());
}
if (parameter_type != null) {
- if (parameter_type.BuildinType == BuildinTypeSpec.Type.Dynamic) {
+ if (parameter_type.BuiltinType == BuiltinTypeSpec.Type.Dynamic) {
pa.Dynamic.EmitAttribute (builder);
} else if (parameter_type.HasDynamicElement) {
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 (ec.BuildinTypes, 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)
{
- TypeSpec p_type = ec.Module.PredefinedTypes.ParameterExpression.Resolve (location);
+ TypeSpec p_type = ec.Module.PredefinedTypes.ParameterExpression.Resolve ();
return new TypeExpression (p_type, location);
}
}
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;
}
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);
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)
// 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);
//
// Default parameter value expression. We need this wrapper to handle
- // default parameter values of folded constants when for indexer parameters
+ // 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
}
}
- if (!expr.IsNull && TypeManager.IsReferenceType (parameter_type) && parameter_type.BuildinType != BuildinTypeSpec.Type.String) {
+ 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 ());
"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);
+ }
}
}
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