private Symbol LookupGlobalSymbolByName(IdentifierSyntax identifierSyntax, bool isFunctionCall)
{
// attempt to find name in the built in namespaces. imported namespaces will be present in the declarations list as they create declared symbols.
if (this.namespaceResolver.BuiltIns.TryGetValue(identifierSyntax.IdentifierName) is { } namespaceSymbol)
{
// namespace symbol found
return(namespaceSymbol);
}
// declarations must not have a namespace value, namespaces are used to fully qualify a function access.
// There might be instances where a variable declaration for example uses the same name as one of the imported
// functions, in this case to differentiate a variable declaration vs a function access we check the namespace value,
// the former case must have an empty namespace value whereas the latter will have a namespace value.
if (this.declarations.TryGetValue(identifierSyntax.IdentifierName, out var globalSymbol))
{
// we found the symbol in the global namespace
return(globalSymbol);
}
// attempt to find function in all imported namespaces
var foundSymbols = namespaceResolver.ResolveUnqualifiedFunction(identifierSyntax, includeDecorators: allowedFlags.HasAnyDecoratorFlag());
if (foundSymbols.Count() > 1)
{
// ambiguous symbol
return(new ErrorSymbol(DiagnosticBuilder.ForPosition(identifierSyntax).AmbiguousSymbolReference(identifierSyntax.IdentifierName, namespaceResolver.GetNamespaceNames().ToImmutableSortedSet(StringComparer.Ordinal))));
}
var foundSymbol = foundSymbols.FirstOrDefault();
return(isFunctionCall ?
SymbolValidator.ResolveUnqualifiedFunction(allowedFlags, foundSymbol, identifierSyntax, namespaceResolver) :
SymbolValidator.ResolveUnqualifiedSymbol(foundSymbol, identifierSyntax, namespaceResolver, declarations.Keys));
}
private Symbol LookupSymbolByName(IdentifierSyntax identifierSyntax, bool isFunctionCall)
{
// attempt to find name in the imported namespaces
if (this.namespaces.TryGetValue(identifierSyntax.IdentifierName, out var namespaceSymbol))
{
// namespace symbol found
return(namespaceSymbol);
}
// declarations must not have a namespace value, namespaces are used to fully qualify a function access.
// There might be instances where a variable declaration for example uses the same name as one of the imported
// functions, in this case to differentiate a variable declaration vs a function access we check the namespace value,
// the former case must have an empty namespace value whereas the latter will have a namespace value.
if (this.declarations.TryGetValue(identifierSyntax.IdentifierName, out var localSymbol))
{
// we found the symbol in the local namespace
return(localSymbol);
}
// attempt to find function in all imported namespaces
var foundSymbols = this.namespaces
.Select(kvp => allowedFlags.HasDecoratorFlag()
? kvp.Value.Type.MethodResolver.TryGetSymbol(identifierSyntax) ?? kvp.Value.Type.DecoratorResolver.TryGetSymbol(identifierSyntax)
: kvp.Value.Type.MethodResolver.TryGetSymbol(identifierSyntax))
.Where(symbol => symbol != null)
.ToList();
if (foundSymbols.Count > 1)
{
// ambiguous symbol
return(new ErrorSymbol(DiagnosticBuilder.ForPosition(identifierSyntax).AmbiguousSymbolReference(identifierSyntax.IdentifierName, this.namespaces.Keys)));
}
var foundSymbol = foundSymbols.FirstOrDefault();
return(isFunctionCall ?
SymbolValidator.ResolveUnqualifiedFunction(allowedFlags, foundSymbol, identifierSyntax, namespaces.Values) :
SymbolValidator.ResolveUnqualifiedSymbol(foundSymbol, identifierSyntax, namespaces.Values, declarations.Keys));
}