public static SemanticInfoSummary GetSemanticInfoSummary(this SemanticModel semanticModel, SyntaxNode node)
{
SemanticInfoSummary summary = new SemanticInfoSummary();
// The information that is available varies by the type of the syntax node.
SymbolInfo symbolInfo = SymbolInfo.None;
if (node is ExpressionSyntax expr)
{
symbolInfo = semanticModel.GetSymbolInfo(expr);
summary.ConstantValue = semanticModel.GetConstantValue(expr);
var typeInfo = semanticModel.GetTypeInfo(expr);
summary.Type = (TypeSymbol)typeInfo.Type;
summary.ConvertedType = (TypeSymbol)typeInfo.ConvertedType;
summary.ImplicitConversion = semanticModel.GetConversion(expr);
summary.MemberGroup = semanticModel.GetMemberGroup(expr);
}
else if (node is AttributeSyntax attribute)
{
symbolInfo = semanticModel.GetSymbolInfo(attribute);
var typeInfo = semanticModel.GetTypeInfo(attribute);
summary.Type = (TypeSymbol)typeInfo.Type;
summary.ConvertedType = (TypeSymbol)typeInfo.ConvertedType;
summary.ImplicitConversion = semanticModel.GetConversion(attribute);
summary.MemberGroup = semanticModel.GetMemberGroup(attribute);
}
else if (node is OrderingSyntax ordering)
{
symbolInfo = semanticModel.GetSymbolInfo(ordering);
}
else if (node is SelectOrGroupClauseSyntax selectOrGroupClause)
{
symbolInfo = semanticModel.GetSymbolInfo(selectOrGroupClause);
}
else if (node is ConstructorInitializerSyntax initializer)
{
symbolInfo = semanticModel.GetSymbolInfo(initializer);
var typeInfo = semanticModel.GetTypeInfo(initializer);
summary.Type = (TypeSymbol)typeInfo.Type;
summary.ConvertedType = (TypeSymbol)typeInfo.ConvertedType;
summary.ImplicitConversion = semanticModel.GetConversion(initializer);
summary.MemberGroup = semanticModel.GetMemberGroup(initializer);
}
else
{
throw ExceptionUtilities.UnexpectedValue(node);
}
summary.Symbol = (Symbol)symbolInfo.Symbol;
summary.CandidateReason = symbolInfo.CandidateReason;
summary.CandidateSymbols = symbolInfo.CandidateSymbols;
if (node is IdentifierNameSyntax identifier)
{
summary.Alias = semanticModel.GetAliasInfo(identifier);
}
return(summary);
}
public static SemanticInfoSummary GetSpeculativeSemanticInfoSummary(
this SemanticModel semanticModel,
int position,
SyntaxNode node,
SpeculativeBindingOption bindingOption
)
{
SemanticInfoSummary summary = new SemanticInfoSummary();
// The information that is available varies by the type of the syntax node.
SymbolInfo symbolInfo = new SymbolInfo();
if (node is ExpressionSyntax)
{
ExpressionSyntax expr = (ExpressionSyntax)node;
symbolInfo = semanticModel.GetSpeculativeSymbolInfo(position, expr, bindingOption);
//summary.ConstantValue = semanticModel.GetSpeculativeConstantValue(expr);
var typeInfo = semanticModel.GetSpeculativeTypeInfo(position, expr, bindingOption);
summary.Type = typeInfo.Type;
summary.ConvertedType = typeInfo.ConvertedType;
summary.Nullability = typeInfo.Nullability;
summary.ConvertedNullability = typeInfo.ConvertedNullability;
summary.ImplicitConversion = semanticModel.GetSpeculativeConversion(
position,
expr,
bindingOption
);
//summary.MethodGroup = semanticModel.GetSpeculativeMethodGroup(expr);
}
else if (node is ConstructorInitializerSyntax)
{
var initializer = (ConstructorInitializerSyntax)node;
symbolInfo = semanticModel.GetSpeculativeSymbolInfo(position, initializer);
}
else
{
throw new NotSupportedException(
"Type of syntax node is not supported by GetSemanticInfoSummary"
);
}
summary.Symbol = symbolInfo.Symbol;
summary.CandidateReason = symbolInfo.CandidateReason;
summary.CandidateSymbols = symbolInfo.CandidateSymbols;
if (node is IdentifierNameSyntax)
{
summary.Alias = semanticModel.GetSpeculativeAliasInfo(
position,
(IdentifierNameSyntax)node,
bindingOption
);
}
return(summary);
}