internal bool TryResolveExtendedName(ImmutableContextBase context, FullSymbol enclosingName, FullSymbol requestedName, out ModuleBinding result)
{
// Semantically nested namespaces forms hierarchical structure, when nested namespace is stored in the outer namespace.
// For performance reasons, file module stores all names in one big map with combined keys.
// This means that when looking for A.B we should look at the current scope for A, then need to combine A and B
// and look for A.B in the file module.
// This means that extended (or partial) names are only allowed if the enclosing name is valid.
// In this case we will combine requested name with the enclosing one and look in the current file module.
result = null;
if (!enclosingName.IsValid)
{
return(false);
}
if (m_partialSymbolsCache.Value.TryGetValue(requestedName, out result))
{
return(true);
}
var extendedFullName = enclosingName.Combine(context.FrontEndContext.SymbolTable, requestedName);
// Now trying to resolve extended name in the current file.
result = GetNamespaceBinding(context, extendedFullName, recurs: false);
// If resolution was successful, saving it in the cache.
if (result != null)
{
m_partialSymbolsCache.Value.GetOrAdd(requestedName, result);
return(true);
}
return(false);
}
public void Combine()
{
var idt = new SymbolTable();
FullSymbol a1 = FullSymbol.Create(idt, @"C");
SymbolAtom p1 = SymbolAtom.Create(idt.StringTable, "A");
FullSymbol a2 = a1.Combine(idt, p1);
XAssert.AreEqual(@"C.A", a2.ToString(idt));
a1 = FullSymbol.Create(idt, @"C.X");
p1 = SymbolAtom.Create(idt.StringTable, "A");
a2 = a1.Combine(idt, p1);
XAssert.AreEqual(@"C.X.A", a2.ToString(idt));
a1 = FullSymbol.Create(idt, @"C.X");
p1 = SymbolAtom.Create(idt.StringTable, "A");
SymbolAtom p2 = SymbolAtom.Create(idt.StringTable, "B");
a2 = a1.Combine(idt, p1, p2);
XAssert.AreEqual(@"C.X.A.B", a2.ToString(idt));
a1 = FullSymbol.Create(idt, @"C.X");
p1 = SymbolAtom.Create(idt.StringTable, "A");
p2 = SymbolAtom.Create(idt.StringTable, "B");
SymbolAtom p3 = SymbolAtom.Create(idt.StringTable, "C");
a2 = a1.Combine(idt, p1, p2, p3);
XAssert.AreEqual(@"C.X.A.B.C", a2.ToString(idt));
a1 = FullSymbol.Create(idt, @"C");
PartialSymbol rp = PartialSymbol.Create(idt.StringTable, @"A.B");
a2 = a1.Combine(idt, rp);
XAssert.AreEqual(@"C.A.B", a2.ToString(idt));
a1 = FullSymbol.Create(idt, @"C.X");
rp = PartialSymbol.Create(idt.StringTable, @"A.B");
a2 = a1.Combine(idt, rp);
XAssert.AreEqual(@"C.X.A.B", a2.ToString(idt));
}