/// <summary>
/// Method to merge attributes from the given attributesSyntaxLists and filter out attributes by attribute target.
/// This is the first step in attribute binding.
/// </summary>
/// <remarks>
/// This method can generate diagnostics for few cases where we have an invalid target specifier and the parser hasn't generated the necessary diagnostics.
/// It should not perform any bind operations as it can lead to an attribute binding cycle.
/// </remarks>
private ImmutableArray <AttributeSyntax> GetAttributesToBind(
OneOrMany <SyntaxList <AttributeListSyntax> > attributeDeclarationSyntaxLists,
AttributeLocation symbolPart,
DiagnosticBag diagnostics,
CSharpCompilation compilation,
Binder rootBinderOpt,
out ImmutableArray <Binder> binders)
{
var attributeTarget = (IAttributeTargetSymbol)this;
ArrayBuilder <AttributeSyntax> syntaxBuilder = null;
ArrayBuilder <Binder> bindersBuilder = null;
int attributesToBindCount = 0;
for (int listIndex = 0; listIndex < attributeDeclarationSyntaxLists.Count; listIndex++)
{
var attributeDeclarationSyntaxList = attributeDeclarationSyntaxLists[listIndex];
if (attributeDeclarationSyntaxList.Any())
{
int prevCount = attributesToBindCount;
foreach (var attributeDeclarationSyntax in attributeDeclarationSyntaxList)
{
// We bind the attribute only if it has a matching target for the given ownerSymbol and attributeLocation.
if (MatchAttributeTarget(attributeTarget, symbolPart, attributeDeclarationSyntax.Target, diagnostics))
{
if (syntaxBuilder == null)
{
syntaxBuilder = new ArrayBuilder <AttributeSyntax>();
bindersBuilder = new ArrayBuilder <Binder>();
}
var attributesToBind = attributeDeclarationSyntax.Attributes;
syntaxBuilder.AddRange(attributesToBind);
attributesToBindCount += attributesToBind.Count;
}
}
if (attributesToBindCount != prevCount)
{
Debug.Assert(attributeDeclarationSyntaxList.Node != null);
Debug.Assert(bindersBuilder != null);
var syntaxTree = attributeDeclarationSyntaxList.Node.SyntaxTree;
var binder = rootBinderOpt ?? compilation.GetBinderFactory(syntaxTree).GetBinder((CSharpSyntaxNode)attributeDeclarationSyntaxList.Node);
binder = new ContextualAttributeBinder(binder, this);
Debug.Assert(!binder.InAttributeArgument, "Possible cycle in attribute binding");
for (int i = 0; i < attributesToBindCount - prevCount; i++)
{
bindersBuilder.Add(binder);
}
}
}
}
if (syntaxBuilder != null)
{
binders = bindersBuilder.ToImmutableAndFree();
return(syntaxBuilder.ToImmutableAndFree());
}
else
{
binders = ImmutableArray <Binder> .Empty;
return(ImmutableArray <AttributeSyntax> .Empty);
}
}
/// <summary>
/// Method to merge attributes from the given attributesSyntaxLists and filter out attributes by attribute target.
/// This is the first step in attribute binding.
/// </summary>
/// <remarks>
/// This method can generate diagnostics for few cases where we have an invalid target specifier and the parser hasn't generated the necessary diagnostics.
/// It should not perform any bind operations as it can lead to an attribute binding cycle.
/// </remarks>
private ImmutableArray<AttributeSyntax> GetAttributesToBind(
OneOrMany<SyntaxList<AttributeListSyntax>> attributeDeclarationSyntaxLists,
AttributeLocation symbolPart,
DiagnosticBag diagnostics,
CSharpCompilation compilation,
out ImmutableArray<Binder> binders)
{
var attributeTarget = (IAttributeTargetSymbol)this;
ArrayBuilder<AttributeSyntax> syntaxBuilder = null;
ArrayBuilder<Binder> bindersBuilder = null;
int attributesToBindCount = 0;
for (int listIndex = 0; listIndex < attributeDeclarationSyntaxLists.Count; listIndex++)
{
var attributeDeclarationSyntaxList = attributeDeclarationSyntaxLists[listIndex];
if (attributeDeclarationSyntaxList.Any())
{
int prevCount = attributesToBindCount;
foreach (var attributeDeclarationSyntax in attributeDeclarationSyntaxList)
{
// We bind the attribute only if it has a matching target for the given ownerSymbol and attributeLocation.
if (MatchAttributeTarget(attributeTarget, symbolPart, attributeDeclarationSyntax.Target, diagnostics))
{
if (syntaxBuilder == null)
{
syntaxBuilder = new ArrayBuilder<AttributeSyntax>();
bindersBuilder = new ArrayBuilder<Binder>();
}
var attributesToBind = attributeDeclarationSyntax.Attributes;
syntaxBuilder.AddRange(attributesToBind);
attributesToBindCount += attributesToBind.Count;
}
}
if (attributesToBindCount != prevCount)
{
Debug.Assert(attributeDeclarationSyntaxList.Node != null);
Debug.Assert(bindersBuilder != null);
var syntaxTree = attributeDeclarationSyntaxList.Node.SyntaxTree;
var binder = compilation.GetBinderFactory(syntaxTree).GetBinder((CSharpSyntaxNode)attributeDeclarationSyntaxList.Node);
binder = new ContextualAttributeBinder(binder, this);
Debug.Assert(!binder.InAttributeArgument, "Possible cycle in attribute binding");
for (int i = 0; i < attributesToBindCount - prevCount; i++)
{
bindersBuilder.Add(binder);
}
}
}
}
if (syntaxBuilder != null)
{
binders = bindersBuilder.ToImmutableAndFree();
return syntaxBuilder.ToImmutableAndFree();
}
else
{
binders = ImmutableArray<Binder>.Empty;
return ImmutableArray<AttributeSyntax>.Empty;
}
}
private ImmutableArray <AttributeSyntax> GetAttributesToBind(
OneOrMany <SyntaxList <AttributeListSyntax> > attributeDeclarationSyntaxLists,
AttributeLocation symbolPart,
BindingDiagnosticBag diagnostics,
CSharpCompilation compilation,
Func <AttributeSyntax, bool> attributeMatchesOpt,
Binder rootBinderOpt,
out ImmutableArray <Binder> binders)
{
var attributeTarget = (IAttributeTargetSymbol)this;
ArrayBuilder <AttributeSyntax> syntaxBuilder = null;
ArrayBuilder <Binder> bindersBuilder = null;
int attributesToBindCount = 0;
for (int listIndex = 0; listIndex < attributeDeclarationSyntaxLists.Count; listIndex++)
{
var attributeDeclarationSyntaxList = attributeDeclarationSyntaxLists[listIndex];
if (attributeDeclarationSyntaxList.Any())
{
int prevCount = attributesToBindCount;
foreach (var attributeDeclarationSyntax in attributeDeclarationSyntaxList)
{
// We bind the attribute only if it has a matching target for the given ownerSymbol and attributeLocation.
if (MatchAttributeTarget(attributeTarget, symbolPart, attributeDeclarationSyntax.Target, diagnostics))
{
if (syntaxBuilder == null)
{
syntaxBuilder = new ArrayBuilder <AttributeSyntax>();
bindersBuilder = new ArrayBuilder <Binder>();
}
var attributesToBind = attributeDeclarationSyntax.Attributes;
if (attributeMatchesOpt is null)
{
syntaxBuilder.AddRange(attributesToBind);
attributesToBindCount += attributesToBind.Count;
}
else
{
foreach (var attribute in attributesToBind)
{
if (attributeMatchesOpt(attribute))
{
syntaxBuilder.Add(attribute);
attributesToBindCount++;
}
}
}
}
}
if (attributesToBindCount != prevCount)
{
Debug.Assert(attributeDeclarationSyntaxList.Node != null);
Debug.Assert(bindersBuilder != null);
var syntaxTree = attributeDeclarationSyntaxList.Node.SyntaxTree;
var binder = rootBinderOpt ?? compilation.GetBinderFactory(syntaxTree).GetBinder(attributeDeclarationSyntaxList.Node);
binder = new ContextualAttributeBinder(binder, this);
Debug.Assert(!binder.InAttributeArgument || this is MethodSymbol {
MethodKind: MethodKind.LambdaMethod
}, "Possible cycle in attribute binding");