private bool TryMemberExpression(MemberAccessExpressionSyntax memberAccessExpression,
IDom newItem,
SemanticModel model,
ref object value,
ref LiteralKind literalKind,
ref string constantIdentifier)
{
if (memberAccessExpression == null)
{
return(false);
}
literalKind = LiteralKind.MemberAccess;
// If this is legal code, this is a constant or an enum
var constant = model.GetConstantValue(memberAccessExpression);
if (constant.HasValue)
{
constantIdentifier = memberAccessExpression.ToString();
value = constant.Value;
}
else
{
constantIdentifier = memberAccessExpression.ToFullString();
value = memberAccessExpression.ToFullString();
}
return(true);
}
private bool TryIdentifierExpression(MemberAccessExpressionSyntax identifierExpression,
IDom newItem,
SemanticModel model,
ref object value,
ref LiteralKind literalKind,
ref string constantIdentifier)
{
if (identifierExpression == null)
{
return(false);
}
literalKind = LiteralKind.Identifier;
constantIdentifier = identifierExpression.ToFullString();
value = identifierExpression.ToFullString();
return(true);
}
// apply constant substitution
public override SyntaxNode VisitMemberAccessExpression(MemberAccessExpressionSyntax node)
{
if (substitutionNames.ContainsKey(node.Name.Identifier.Text)) // pre-test on name for performance
{
ISymbol identifierSymbol = semanticModel.GetSymbolInfo(node).Symbol;
if (identifierSymbol != null)
{
ExpressionSyntax constValue;
if (substitutions.TryGetValue(identifierSymbol, out constValue))
{
#pragma warning disable CS0162 // unreachable
if (trace)
{
Console.WriteLine("CONSTSUBST: {0}: {1} ==> {2}", GetTraceParent(node).ToFullString(), node.ToFullString(), constValue.ToFullString());
}
#pragma warning restore CS0162
return(constValue.WithTriviaFrom(node));
}
}
}
return(base.VisitMemberAccessExpression(node));
}
