/// <remarks>
/// Base class for expressions
/// </remarks>
- public abstract class Expression {
+ public abstract class Expression
+ {
public ExprClass eclass;
protected TypeSpec type;
protected Location loc;
-
+
public TypeSpec Type {
get { return type; }
set { type = value; }
{
report.Error (201, loc, "Only assignment, call, increment, decrement, await, and new object expressions can be used as a statement");
}
-
+
public void Error_InvalidExpressionStatement (BlockContext bc)
{
Error_InvalidExpressionStatement (bc.Report, loc);
if (type == InternalType.ErrorType || target == InternalType.ErrorType)
return;
+ if (type.MemberDefinition.DeclaringAssembly.IsMissing ||
+ target.MemberDefinition.DeclaringAssembly.IsMissing)
+ return;
+
string from_type = type.GetSignatureForError ();
string to_type = target.GetSignatureForError ();
if (from_type == to_type) {
public static Expression MemberLookup (IMemberContext rc, bool errorMode, TypeSpec queried_type, string name, int arity, MemberLookupRestrictions restrictions, Location loc)
{
var members = MemberCache.FindMembers (queried_type, name, false);
- if (members == null)
- return null;
- Expression expr;
- do {
- expr = MemberLookupToExpression (rc, members, errorMode, queried_type, name, arity, restrictions, loc);
- if (expr != null)
- return expr;
+ if (members != null) {
+ Expression expr;
+ do {
+ expr = MemberLookupToExpression (rc, members, errorMode, queried_type, name, arity, restrictions, loc);
+ if (expr != null)
+ return expr;
- if (members [0].DeclaringType.BaseType == null)
- members = null;
- else
- members = MemberCache.FindMembers (members [0].DeclaringType.BaseType, name, false);
- } while (members != null);
+ if (members [0].DeclaringType.BaseType == null)
+ members = null;
+ else
+ members = MemberCache.FindMembers (members [0].DeclaringType.BaseType, name, false);
+ } while (members != null);
+ }
+
+ var tps = queried_type as TypeParameterSpec;
+ if (tps != null) {
+ members = MemberCache.FindInterfaceMembers (tps, name);
+ if (members != null)
+ return MemberLookupToExpression (rc, members, errorMode, queried_type, name, arity, restrictions, loc);
+ }
- return expr;
+ return null;
}
public static Expression MemberLookupToExpression (IMemberContext rc, IList<MemberSpec> members, bool errorMode, TypeSpec queried_type, string name, int arity, MemberLookupRestrictions restrictions, Location loc)
if ((restrictions & MemberLookupRestrictions.InvocableOnly) != 0) {
if (member is MethodSpec) {
- //
- // Interface members that are hidden by class members are removed from the set. This
- // step only has an effect if T is a type parameter and T has both an effective base
- // class other than object and a non-empty effective interface set
- //
- var tps = queried_type as TypeParameterSpec;
- if (tps != null && tps.HasTypeConstraint)
- members = RemoveHiddenTypeParameterMethods (members);
-
return new MethodGroupExpr (members, queried_type, loc);
}
return null;
}
- static IList<MemberSpec> RemoveHiddenTypeParameterMethods (IList<MemberSpec> members)
- {
- if (members.Count < 2)
- return members;
-
- //
- // If M is a method, then all non-method members declared in an interface declaration
- // are removed from the set, and all methods with the same signature as M declared in
- // an interface declaration are removed from the set
- //
-
- bool copied = false;
- for (int i = 0; i < members.Count; ++i) {
- var method = members[i] as MethodSpec;
- if (method == null) {
- if (!copied) {
- copied = true;
- members = new List<MemberSpec> (members);
- }
-
- members.RemoveAt (i--);
- continue;
- }
-
- if (!method.DeclaringType.IsInterface)
- continue;
-
- for (int ii = 0; ii < members.Count; ++ii) {
- var candidate = members[ii] as MethodSpec;
- if (candidate == null || !candidate.DeclaringType.IsClass)
- continue;
-
- if (!TypeSpecComparer.Override.IsEqual (candidate.Parameters, method.Parameters))
- continue;
-
- if (!AParametersCollection.HasSameParameterDefaults (candidate.Parameters, method.Parameters))
- continue;
-
- if (!copied) {
- copied = true;
- members = new List<MemberSpec> (members);
- }
-
- members.RemoveAt (i--);
- break;
- }
- }
-
- return members;
- }
-
protected static void Error_NamedArgument (NamedArgument na, Report Report)
{
Report.Error (1742, na.Location, "An element access expression cannot use named argument");
Report.Error (214, loc, "Pointers and fixed size buffers may only be used in an unsafe context");
}
+ public static void UnsafeInsideIteratorError (ResolveContext rc, Location loc)
+ {
+ UnsafeInsideIteratorError (rc.Report, loc);
+ }
+
+ public static void UnsafeInsideIteratorError (Report report, Location loc)
+ {
+ report.Error (1629, loc, "Unsafe code may not appear in iterators");
+ }
+
//
// Converts `source' to an int, uint, long or ulong.
//
return null;
}
- public bool IsPossibleTypeOrNamespace (IMemberContext mc)
+ bool IsPossibleTypeOrNamespace (IMemberContext mc)
{
- return mc.LookupNamespaceOrType (Name, Arity, LookupMode.Probing, loc) != null;
+ //
+ // Has to ignore static usings because we are looking for any member not just type
+ // in this context
+ //
+ return mc.LookupNamespaceOrType (Name, Arity, LookupMode.Probing | LookupMode.IgnoreStaticUsing, loc) != null;
}
public bool IsPossibleType (IMemberContext mc)
// introduce redundant storey but with `this' only but it's tricky to avoid
// at this stage as we don't know what expressions follow base
//
+ // TODO: It's needed only when the method with base call is moved to a storey
+ //
if (rc.CurrentAnonymousMethod != null) {
if (targs == null && method.IsGeneric) {
targs = method.TypeArguments;
CheckProtectedMemberAccess (rc, member);
}
- if (member.MemberType.IsPointer && !rc.IsUnsafe) {
- UnsafeError (rc, loc);
+ if (member.MemberType.IsPointer) {
+ if (rc.CurrentIterator != null) {
+ UnsafeInsideIteratorError (rc, loc);
+ } else if (!rc.IsUnsafe) {
+ UnsafeError (rc, loc);
+ }
}
var dep = member.GetMissingDependencies ();
return this;
}
+ public virtual void ResolveNameOf (ResolveContext rc, ATypeNameExpression expr)
+ {
+
+ }
+
protected void EmitInstance (EmitContext ec, bool prepare_for_load)
{
var inst = new InstanceEmitter (InstanceExpression, TypeSpec.IsValueType (InstanceExpression.Type));
// For extension methodgroup we are not looking for base members but parent
// namespace extension methods
//
- public override IList<MemberSpec> GetBaseMembers (TypeSpec baseType)
+ public override IList<MemberSpec> GetBaseMembers (TypeSpec type)
{
// TODO: candidates are null only when doing error reporting, that's
// incorrect. We have to discover same extension methods in error mode
Convert.ImplicitBoxingConversion (null, argType, extensionType) != null;
}
- public bool ResolveNameOf (ResolveContext rc, MemberAccess ma)
+ public override void ResolveNameOf (ResolveContext rc, ATypeNameExpression expr)
{
- rc.Report.Error (8093, ma.Location, "An argument to nameof operator cannot be extension method group");
-
- // Not included in C#6
- /*
- ExtensionExpression = ExtensionExpression.Resolve (rc);
- if (ExtensionExpression == null)
- return false;
-
- var argType = ExtensionExpression.Type;
- foreach (MethodSpec candidate in Candidates) {
- if (ExtensionMethodGroupExpr.IsExtensionTypeCompatible (argType, candidate.Parameters.ExtensionMethodType))
- return true;
- }
-
- // TODO: Scan full hierarchy
-
- ma.Error_TypeDoesNotContainDefinition (rc, argType, ma.Name);
- */
- return false;
+ rc.Report.Error (8093, expr.Location, "An argument to nameof operator cannot be extension method group");
}
public override MethodGroupExpr LookupExtensionMethod (ResolveContext rc)
return base.ResolveMemberAccess (ec, left, original);
}
+ public override void ResolveNameOf (ResolveContext rc, ATypeNameExpression expr)
+ {
+ if (!HasAccessibleCandidate (rc)) {
+ ErrorIsInaccesible (rc, expr.GetSignatureForError (), loc);
+ }
+
+ if (expr.HasTypeArguments) {
+ rc.Report.Error (8084, expr.Location, "An argument to nameof operator cannot be method group with type arguments");
+ }
+ }
+
public override void SetTypeArguments (ResolveContext ec, TypeArguments ta)
{
type_arguments = ta;
#region IBaseMembersProvider Members
- public virtual IList<MemberSpec> GetBaseMembers (TypeSpec baseType)
+ public virtual IList<MemberSpec> GetBaseMembers (TypeSpec type)
{
- return baseType == null ? null : MemberCache.FindMembers (baseType, Methods [0].Name, false);
+ var baseType = type.BaseType;
+
+ IList<MemberSpec> members = baseType == null ? null : MemberCache.FindMembers (baseType, Methods [0].Name, false);
+
+ if (members == null && !type.IsInterface) {
+ var tps = queried_type as TypeParameterSpec;
+ if (tps != null)
+ members = MemberCache.FindInterfaceMembers (tps, Methods [0].Name);
+ }
+
+ return members;
}
public IParametersMember GetOverrideMemberParameters (MemberSpec member)
{
TypeSpec argument_type = a.Type;
+ //
+ // Exactly matching Expression phase
+ //
+
//
// If argument is an anonymous function
//
if (q != p) {
//
- // An inferred return type X exists for E in the context of that parameter list, and
- // the conversion from X to Y1 is better than the conversion from X to Y2
+ // An inferred return type X exists for E in the context of the parameter list, and
+ // an identity conversion exists from X to the return type of D
//
- argument_type = am.InferReturnType (ec, null, orig_q);
- if (argument_type == null) {
- // TODO: Can this be hit?
- return 1;
- }
+ var inferred_type = am.InferReturnType (ec, null, orig_q);
+ if (inferred_type != null) {
+ if (inferred_type.BuiltinType == BuiltinTypeSpec.Type.Dynamic)
+ inferred_type = ec.BuiltinTypes.Object;
- if (argument_type.BuiltinType == BuiltinTypeSpec.Type.Dynamic)
- argument_type = ec.BuiltinTypes.Object;
+ if (inferred_type == p)
+ return 1;
+
+ if (inferred_type == q)
+ return 2;
+ }
}
}
return IsBetterConversionTarget (rc, p, q);
}
+ var p_orig = p;
if (p.IsNullableType) {
p = Nullable.NullableInfo.GetUnderlyingType (p);
if (!BuiltinTypeSpec.IsPrimitiveTypeOrDecimal (p))
- return 0;
+ return BetterTypeConversionImplicitConversion (rc, p_orig, q);
//
// Spec expects implicit conversion check between p and q, q and p
return 2;
}
+ var q_orig = q;
if (q.IsNullableType) {
q = Nullable.NullableInfo.GetUnderlyingType (q);
if (!BuiltinTypeSpec.IsPrimitiveTypeOrDecimal (q))
- return 0;
+ return BetterTypeConversionImplicitConversion (rc, p_orig, q_orig);
if (q == p)
return 1;
break;
}
+ return BetterTypeConversionImplicitConversion (ec, p, q);
+ }
+
+ static int BetterTypeConversionImplicitConversion (ResolveContext rc, TypeSpec p, TypeSpec q)
+ {
// TODO: this is expensive
Expression p_tmp = new EmptyExpression (p);
Expression q_tmp = new EmptyExpression (q);
- bool p_to_q = Convert.ImplicitConversionExists (ec, p_tmp, q);
- bool q_to_p = Convert.ImplicitConversionExists (ec, q_tmp, p);
+ bool p_to_q = Convert.ImplicitConversionExists (rc, p_tmp, q);
+ bool q_to_p = Convert.ImplicitConversionExists (rc, q_tmp, p);
if (p_to_q && !q_to_p)
return 1;
//
// A candidate with no default parameters is still better when there
- // is no better expression conversion
+ // is no better expression conversion and does not have more parameters
//
if (candidate_pd.Count < best_pd.Count) {
- if (!candidate_params && !candidate_pd.FixedParameters [j - j].HasDefaultValue) {
+ if (candidate_params)
+ return false;
+
+ if (!candidate_pd.FixedParameters [j - 1].HasDefaultValue)
return true;
- }
+
+ if (best_pd.FixedParameters [j].HasDefaultValue)
+ return true;
+
} else if (candidate_pd.Count == best_pd.Count) {
if (candidate_params)
return false;
// The slot has been taken by positional argument
if (temp != null && !(temp is NamedArgument))
- break;
+ return NamedArgumentsMismatch - i - 1;
}
if (!arg_moved) {
if ((fp.ModFlags & Parameter.Modifier.CallerLineNumber) != 0) {
e = new IntLiteral (ec.BuiltinTypes, loc.Row, loc);
} else if ((fp.ModFlags & Parameter.Modifier.CallerFilePath) != 0) {
- e = new StringLiteral (ec.BuiltinTypes, loc.NameFullPath, loc);
+ e = new StringLiteral (ec.BuiltinTypes, loc.SourceFile.GetFullPathName (ec.Module.Compiler.Settings.PathMap), loc);
} else if (ec.MemberContext.CurrentMemberDefinition != null) {
e = new StringLiteral (ec.BuiltinTypes, ec.MemberContext.CurrentMemberDefinition.GetCallerMemberName (), loc);
}
static TypeSpec MoreSpecific (TypeSpec p, TypeSpec q)
{
- if (TypeManager.IsGenericParameter (p) && !TypeManager.IsGenericParameter (q))
- return q;
- if (!TypeManager.IsGenericParameter (p) && TypeManager.IsGenericParameter (q))
- return p;
+ if (p.IsGenericParameter != q.IsGenericParameter)
+ return p.IsGenericParameter ? q : p;
var ac_p = p as ArrayContainer;
if (ac_p != null) {
return p;
if (specific == ac_q.Element)
return q;
- } else if (p.IsGeneric && q.IsGeneric) {
- var pargs = TypeManager.GetTypeArguments (p);
- var qargs = TypeManager.GetTypeArguments (q);
+
+ return null;
+ }
+
+ if (p.IsGeneric && q.IsGeneric) {
+ var pargs = p.TypeArguments;
+ var qargs = q.TypeArguments;
bool p_specific_at_least_once = false;
bool q_specific_at_least_once = false;
for (int i = 0; i < pargs.Length; i++) {
- TypeSpec specific = MoreSpecific (pargs[i], qargs[i]);
- if (specific == pargs[i])
+ TypeSpec specific = MoreSpecific (pargs [i], qargs [i]);
+ if (specific == pargs [i])
p_specific_at_least_once = true;
- if (specific == qargs[i])
+ if (specific == qargs [i])
q_specific_at_least_once = true;
}
// Restore expanded arguments
candidate_args = args;
}
- } while (best_candidate_rate != 0 && (type_members = base_provider.GetBaseMembers (type_members[0].DeclaringType.BaseType)) != null);
+ } while (best_candidate_rate != 0 && (type_members = base_provider.GetBaseMembers (type_members[0].DeclaringType)) != null);
//
// We've found exact match
arg_count++;
}
- if (has_unsafe_arg && !ec.IsUnsafe) {
- Expression.UnsafeError (ec, loc);
+ if (has_unsafe_arg) {
+ if (ec.CurrentIterator != null) {
+ Expression.UnsafeInsideIteratorError (ec, loc);
+ } else if (!ec.IsUnsafe) {
+ Expression.UnsafeError (ec, loc);
+ }
}
//
return constant.GetSignatureForError ();
}
+ public override void ResolveNameOf (ResolveContext rc, ATypeNameExpression expr)
+ {
+ constant.CheckObsoleteness (rc, expr.Location);
+ }
+
public override void SetTypeArguments (ResolveContext ec, TypeArguments ta)
{
Error_TypeArgumentsCannotBeUsed (ec, "constant", GetSignatureForError (), loc);
return this;
}
+ public override void ResolveNameOf (ResolveContext rc, ATypeNameExpression expr)
+ {
+ spec.CheckObsoleteness (rc, expr.Location);
+ }
+
public void SetFieldAssigned (FlowAnalysisContext fc)
{
if (!IsInstance)
public override void EmitAssign (EmitContext ec, Expression source, bool leave_copy, bool isCompound)
{
if (backing_field != null) {
- backing_field.EmitAssign (ec, source, false, false);
+ backing_field.EmitAssign (ec, source, leave_copy, false);
return;
}
return true;
}
+ public override void ResolveNameOf (ResolveContext rc, ATypeNameExpression expr)
+ {
+ if (!best_candidate.IsAccessible (rc))
+ ErrorIsInaccesible (rc, best_candidate.GetSignatureForError (), expr.Location);
+
+ best_candidate.CheckObsoleteness (rc, expr.Location);
+ }
+
public void SetBackingFieldAssigned (FlowAnalysisContext fc)
{
if (backing_field != null) {
return TypeManager.CSharpSignature (spec);
}
+ public override void ResolveNameOf (ResolveContext rc, ATypeNameExpression expr)
+ {
+ spec.CheckObsoleteness (rc, expr.Location);
+ }
+
public override void SetTypeArguments (ResolveContext ec, TypeArguments ta)
{
Error_TypeArgumentsCannotBeUsed (ec, "event", GetSignatureForError (), loc);
projects / mono.git / blobdiff