//
// 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,
- SignatureMask = REFMASK | OUTMASK,
- 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;
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);
return null;
this.idx = index;
-
- 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;
}
+ 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;
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 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);
public void EmitAddressOf (EmitContext ec)
{
- if ((ModFlags & Modifier.ISBYREF) != 0) {
+ if ((ModFlags & Modifier.RefOutMask) != 0) {
ec.EmitArgumentLoad (idx);
} else {
ec.EmitArgumentAddress (idx);
}
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
sb.Append (types [i].GetSignatureForDocumentation ());
- if ((parameters[i].ModFlags & Parameter.Modifier.ISBYREF) != 0)
+ if ((parameters[i].ModFlags & Parameter.Modifier.RefOutMask) != 0)
sb.Append ("@");
}
sb.Append (")");
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;
// 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
"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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