internal override void NavigatorDone(CSharpAstResolver resolver, CancellationToken cancellationToken)
{
foreach (var expr in potentialMethodGroupConversions)
{
var conversion = resolver.GetConversion(expr, cancellationToken);
if (conversion.IsMethodGroupConversion && conversion.Method.MemberDefinition == method)
{
IType targetType = resolver.GetExpectedType(expr, cancellationToken);
ResolveResult result = resolver.Resolve(expr, cancellationToken);
ReportMatch(expr, new ConversionResolveResult(targetType, result, conversion));
}
}
base.NavigatorDone(resolver, cancellationToken);
}
internal override void NavigatorDone(CSharpAstResolver resolver, CancellationToken cancellationToken)
{
foreach (var expr in potentialMethodGroupConversions) {
var conversion = resolver.GetConversion(expr, cancellationToken);
if (conversion.IsMethodGroupConversion && findReferences.IsMemberMatch(method, conversion.Method, conversion.IsVirtualMethodLookup)) {
IType targetType = resolver.GetExpectedType(expr, cancellationToken);
ResolveResult result = resolver.Resolve(expr, cancellationToken);
ReportMatch(expr, new ConversionResolveResult(targetType, result, conversion));
}
}
base.NavigatorDone(resolver, cancellationToken);
}
public static ResolveResult Resolve(Lazy<ICompilation> compilation, CSharpUnresolvedFile unresolvedFile, SyntaxTree syntaxTree, TextLocation location, out AstNode node,
CancellationToken cancellationToken = default(CancellationToken))
{
node = syntaxTree.GetNodeAt(location);
if (node == null || node is ArrayInitializerExpression)
return null;
if (node.Parent is UsingAliasDeclaration && node.Role == UsingAliasDeclaration.AliasRole) {
var r = new CSharpAstResolver(compilation.Value, syntaxTree, unresolvedFile);
return r.Resolve(((UsingAliasDeclaration)node.Parent).Import, cancellationToken);
}
if (CSharpAstResolver.IsUnresolvableNode(node)) {
if (node is Identifier) {
node = node.Parent;
} else if (node.NodeType == NodeType.Token) {
if (node.Parent is IndexerExpression || node.Parent is ConstructorInitializer) {
// There's no other place where one could hover to see the indexer's tooltip,
// so we need to resolve it when hovering over the '[' or ']'.
// For constructor initializer, the same applies to the 'base'/'this' token.
node = node.Parent;
} else {
return null;
}
} else {
// don't resolve arbitrary nodes - we don't want to show tooltips for everything
return null;
}
} else {
// It's a resolvable node.
// However, we usually don't want to show the tooltip everywhere
// For example, hovering with the mouse over an empty line between two methods causes
// node==TypeDeclaration, but we don't want to show any tooltip.
if (!node.GetChildByRole(Roles.Identifier).IsNull) {
// We'll suppress the tooltip for resolvable nodes if there is an identifier that
// could be hovered over instead:
return null;
}
}
if (node == null)
return null;
if (node.Parent is ObjectCreateExpression && node.Role == Roles.Type) {
node = node.Parent;
}
InvocationExpression parentInvocation = null;
if ((node is IdentifierExpression || node is MemberReferenceExpression || node is PointerReferenceExpression) && node.Role != Roles.Argument) {
// we also need to resolve the invocation
parentInvocation = node.Parent as InvocationExpression;
}
// TODO: I think we should provide an overload so that an existing CSharpAstResolver can be reused
CSharpAstResolver resolver = new CSharpAstResolver(compilation.Value, syntaxTree, unresolvedFile);
ResolveResult rr = resolver.Resolve(node, cancellationToken);
MethodGroupResolveResult mgrr = rr as MethodGroupResolveResult;
if (mgrr != null) {
// For method groups, resolve the parent invocation instead.
if (parentInvocation != null)
return resolver.Resolve(parentInvocation);
if (node is Expression) {
// If it's not an invocation, try if it's a conversion to a delegate type:
Conversion c = resolver.GetConversion((Expression)node, cancellationToken);
if (c.IsMethodGroupConversion)
return new MemberResolveResult(mgrr.TargetResult, c.Method);
}
}
return rr;
}
public static ResolveResult Resolve(Lazy <ICompilation> compilation, CSharpUnresolvedFile unresolvedFile, SyntaxTree syntaxTree, TextLocation location, out AstNode node,
CancellationToken cancellationToken = default(CancellationToken))
{
node = syntaxTree.GetNodeAt(location);
if (node == null || node is ArrayInitializerExpression)
{
return(null);
}
if (node.Parent is UsingAliasDeclaration && node.Role == UsingAliasDeclaration.AliasRole)
{
var r = new CSharpAstResolver(compilation.Value, syntaxTree, unresolvedFile);
return(r.Resolve(((UsingAliasDeclaration)node.Parent).Import, cancellationToken));
}
if (CSharpAstResolver.IsUnresolvableNode(node))
{
if (node is Identifier)
{
node = node.Parent;
}
else if (node.NodeType == NodeType.Token)
{
if (node.Parent is IndexerExpression || node.Parent is ConstructorInitializer || node.Role == IndexerDeclaration.ThisKeywordRole)
{
// There's no other place where one could hover to see the indexer's tooltip,
// so we need to resolve it when hovering over the '[' or ']'.
// For constructor initializer, the same applies to the 'base'/'this' token.
node = node.Parent;
}
else if (node.Parent is BinaryOperatorExpression || node.Parent is UnaryOperatorExpression)
{
// Resolve user-defined operator
node = node.Parent;
}
else
{
return(null);
}
}
else
{
// don't resolve arbitrary nodes - we don't want to show tooltips for everything
return(null);
}
}
else
{
// It's a resolvable node.
// However, we usually don't want to show the tooltip everywhere
// For example, hovering with the mouse over an empty line between two methods causes
// node==TypeDeclaration, but we don't want to show any tooltip.
if (!node.GetChildByRole(Roles.Identifier).IsNull)
{
// We'll suppress the tooltip for resolvable nodes if there is an identifier that
// could be hovered over instead:
return(null);
}
}
if (node == null)
{
return(null);
}
if (node.Parent is ObjectCreateExpression && node.Role == Roles.Type)
{
node = node.Parent;
}
InvocationExpression parentInvocation = null;
if ((node is IdentifierExpression || node is MemberReferenceExpression || node is PointerReferenceExpression) && node.Role != Roles.Argument)
{
// we also need to resolve the invocation
parentInvocation = node.Parent as InvocationExpression;
}
// TODO: I think we should provide an overload so that an existing CSharpAstResolver can be reused
CSharpAstResolver resolver = new CSharpAstResolver(compilation.Value, syntaxTree, unresolvedFile);
ResolveResult rr = resolver.Resolve(node, cancellationToken);
MethodGroupResolveResult mgrr = rr as MethodGroupResolveResult;
if (mgrr != null)
{
// For method groups, resolve the parent invocation instead.
if (parentInvocation != null)
{
return(resolver.Resolve(parentInvocation));
}
if (node is Expression)
{
// If it's not an invocation, try if it's a conversion to a delegate type:
Conversion c = resolver.GetConversion((Expression)node, cancellationToken);
if (c.IsMethodGroupConversion)
{
return(new MemberResolveResult(mgrr.TargetResult, c.Method));
}
}
}
return(rr);
}
void ResolveButtonClick(object sender, EventArgs e)
{
IProjectContent project = new CSharpProjectContent();
var unresolvedFile = syntaxTree.ToTypeSystem();
project = project.AddOrUpdateFiles(unresolvedFile);
project = project.AddAssemblyReferences(builtInLibs.Value);
ICompilation compilation = project.CreateCompilation();
ResolveResult result;
IType expectedType = null;
Conversion conversion = null;
if (csharpTreeView.SelectedNode != null) {
var selectedNode = (AstNode)csharpTreeView.SelectedNode.Tag;
CSharpAstResolver resolver = new CSharpAstResolver(compilation, syntaxTree, unresolvedFile);
result = resolver.Resolve(selectedNode);
// CSharpAstResolver.Resolve() never returns null
Expression expr = selectedNode as Expression;
if (expr != null) {
expectedType = resolver.GetExpectedType(expr);
conversion = resolver.GetConversion(expr);
}
} else {
TextLocation location = GetTextLocation(csharpCodeTextBox, csharpCodeTextBox.SelectionStart);
result = ResolveAtLocation.Resolve(compilation, unresolvedFile, syntaxTree, location);
if (result == null) {
MessageBox.Show("Could not find a resolvable node at the caret location.");
return;
}
}
using (var dlg = new SemanticTreeDialog()) {
dlg.AddRoot("Resolve() = ", result);
if (expectedType != null)
dlg.AddRoot("GetExpectedType() = ", expectedType);
if (conversion != null)
dlg.AddRoot("GetConversion() = ", conversion);
dlg.ShowDialog();
}
}