private void ValidateConditionalAttribute(CSharpAttributeData attribute, AttributeSyntax node, DiagnosticBag diagnostics)
{
Debug.Assert(this.IsConditional);
Debug.Assert(!attribute.HasErrors);
if (!this.DeclaringCompilation.IsAttributeType(this))
{
// CS1689: Attribute '{0}' is only valid on methods or attribute classes
diagnostics.Add(ErrorCode.ERR_ConditionalOnNonAttributeClass, node.Location, node.GetErrorDisplayName());
}
else
{
string name = attribute.GetConstructorArgument <string>(0, SpecialType.System_String);
if (name == null || !SyntaxFacts.IsValidIdentifier(name))
{
// CS0633: The argument to the '{0}' attribute must be a valid identifier
CSharpSyntaxNode attributeArgumentSyntax = attribute.GetAttributeArgumentSyntax(0, node);
diagnostics.Add(ErrorCode.ERR_BadArgumentToAttribute, attributeArgumentSyntax.Location, node.GetErrorDisplayName());
}
}
}
// Process the specified AttributeUsage attribute on the given ownerSymbol
private AttributeUsageInfo DecodeAttributeUsageAttribute(CSharpAttributeData attribute, AttributeSyntax node, bool diagnose, DiagnosticBag diagnosticsOpt = null)
{
Debug.Assert(diagnose == (diagnosticsOpt != null));
Debug.Assert(!attribute.HasErrors);
Debug.Assert(!this.IsErrorType());
// AttributeUsage can only be specified for attribute classes
if (!this.DeclaringCompilation.IsAttributeType(this))
{
if (diagnose)
{
diagnosticsOpt.Add(ErrorCode.ERR_AttributeUsageOnNonAttributeClass, node.Name.Location, node.GetErrorDisplayName());
}
return(AttributeUsageInfo.Null);
}
else
{
AttributeUsageInfo info = attribute.DecodeAttributeUsageAttribute();
// Validate first ctor argument for AtributeUsage specification is a valid AttributeTargets enum member
if (!info.HasValidAttributeTargets)
{
if (diagnose)
{
// invalid attribute target
CSharpSyntaxNode attributeArgumentSyntax = attribute.GetAttributeArgumentSyntax(0, node);
diagnosticsOpt.Add(ErrorCode.ERR_InvalidAttributeArgument, attributeArgumentSyntax.Location, node.GetErrorDisplayName());
}
return(AttributeUsageInfo.Null);
}
return(info);
}
}
// Process the specified AttributeUsage attribute on the given ownerSymbol
private AttributeUsageInfo DecodeAttributeUsageAttribute(CSharpAttributeData attribute, AttributeSyntax node, bool diagnose, DiagnosticBag diagnosticsOpt = null)
{
Debug.Assert(diagnose == (diagnosticsOpt != null));
Debug.Assert(!attribute.HasErrors);
Debug.Assert(!this.IsErrorType());
// AttributeUsage can only be specified for attribute classes
if (!this.DeclaringCompilation.IsAttributeType(this))
{
if (diagnose)
{
diagnosticsOpt.Add(ErrorCode.ERR_AttributeUsageOnNonAttributeClass, node.Name.Location, node.GetErrorDisplayName());
}
return AttributeUsageInfo.Null;
}
else
{
AttributeUsageInfo info = attribute.DecodeAttributeUsageAttribute();
// Validate first ctor argument for AtributeUsage specification is a valid AttributeTargets enum member
if (!info.HasValidAttributeTargets)
{
if (diagnose)
{
// invalid attribute target
CSharpSyntaxNode attributeArgumentSyntax = attribute.GetAttributeArgumentSyntax(0, node);
diagnosticsOpt.Add(ErrorCode.ERR_InvalidAttributeArgument, attributeArgumentSyntax.Location, node.GetErrorDisplayName());
}
return AttributeUsageInfo.Null;
}
return info;
}
}
private void ValidateConditionalAttribute(CSharpAttributeData attribute, AttributeSyntax node, DiagnosticBag diagnostics)
{
Debug.Assert(this.IsConditional);
Debug.Assert(!attribute.HasErrors);
if (!this.DeclaringCompilation.IsAttributeType(this))
{
// CS1689: Attribute '{0}' is only valid on methods or attribute classes
diagnostics.Add(ErrorCode.ERR_ConditionalOnNonAttributeClass, node.Location, node.GetErrorDisplayName());
}
else
{
string name = attribute.GetConstructorArgument<string>(0, SpecialType.System_String);
if (name == null || !SyntaxFacts.IsValidIdentifier(name))
{
// CS0633: The argument to the '{0}' attribute must be a valid identifier
CSharpSyntaxNode attributeArgumentSyntax = attribute.GetAttributeArgumentSyntax(0, node);
diagnostics.Add(ErrorCode.ERR_BadArgumentToAttribute, attributeArgumentSyntax.Location, node.GetErrorDisplayName());
}
}
}
private void ValidateConditionalAttribute(CSharpAttributeData attribute, AttributeSyntax node, DiagnosticBag diagnostics)
{
Debug.Assert(this.IsConditional);
if (this.IsAccessor())
{
// CS1667: Attribute '{0}' is not valid on property or event accessors. It is only valid on '{1}' declarations.
AttributeUsageInfo attributeUsage = attribute.AttributeClass.GetAttributeUsageInfo();
diagnostics.Add(ErrorCode.ERR_AttributeNotOnAccessor, node.Name.Location, node.GetErrorDisplayName(), attributeUsage.GetValidTargetsString());
}
else if (this.ContainingType.IsInterfaceType())
{
// CS0582: The Conditional attribute is not valid on interface members
diagnostics.Add(ErrorCode.ERR_ConditionalOnInterfaceMethod, node.Location);
}
else if (this.IsOverride)
{
// CS0243: The Conditional attribute is not valid on '{0}' because it is an override method
diagnostics.Add(ErrorCode.ERR_ConditionalOnOverride, node.Location, this);
}
else if (!this.CanBeReferencedByName || this.MethodKind == MethodKind.Destructor)
{
// CS0577: The Conditional attribute is not valid on '{0}' because it is a constructor, destructor, operator, or explicit interface implementation
diagnostics.Add(ErrorCode.ERR_ConditionalOnSpecialMethod, node.Location, this);
}
else if (!this.ReturnsVoid)
{
// CS0578: The Conditional attribute is not valid on '{0}' because its return type is not void
diagnostics.Add(ErrorCode.ERR_ConditionalMustReturnVoid, node.Location, this);
}
else if (this.HasAnyOutParameter())
{
// CS0685: Conditional member '{0}' cannot have an out parameter
diagnostics.Add(ErrorCode.ERR_ConditionalWithOutParam, node.Location, this);
}
else
{
string name = attribute.GetConstructorArgument<string>(0, SpecialType.System_String);
if (name == null || !SyntaxFacts.IsValidIdentifier(name))
{
// CS0633: The argument to the '{0}' attribute must be a valid identifier
CSharpSyntaxNode attributeArgumentSyntax = attribute.GetAttributeArgumentSyntax(0, node);
diagnostics.Add(ErrorCode.ERR_BadArgumentToAttribute, attributeArgumentSyntax.Location, node.GetErrorDisplayName());
}
}
}