UseFullyQualifiedType

Author: Arthur Ozga

src/compiler/checker.ts

@@ -2834,7 +2834,7 @@ namespace ts {
                 // Try to get qualified name if the symbol is not a type parameter and there is an enclosing declaration.
                 let chain: Symbol[];
                 const isTypeParameter = symbol.flags & SymbolFlags.TypeParameter;
-                if (!isTypeParameter && context.enclosingDeclaration) {
+                if (!isTypeParameter && (context.enclosingDeclaration || context.flags & NodeBuilderFlags.UseFullyQualifiedType)) {
                     chain = getSymbolChain(symbol, meaning, /*endOfChain*/ true);
                     Debug.assert(chain && chain.length > 0);
                 }

src/compiler/types.ts

@@ -2571,7 +2571,6 @@ namespace ts {
         WriteOwnNameForAnyLike                  = 1 << 4,   // Write symbol's own name instead of 'any' for any like types (eg. unknown, __resolving__ etc)
         // TODO
         WriteTypeArgumentsOfSignature           = 1 << 5,   // Write the type arguments instead of type parameters of the signature
-        // TODO
         UseFullyQualifiedType                   = 1 << 6,   // Write out the fully qualified type name (eg. Module.Type, instead of Type)
         // TODO
         UseTypeAliasValue                       = 1 << 7,   // Serialize the type instead of using type-alias. This is needed when we emit declaration file.