demo/typescript.js
function checkTypeNodeAsExpression(node) {
            // When we are emitting type metadata for decorators, we need to try to check the type
            // as if it were an expression so that we can emit the type in a value position when we
            // serialize the type metadata.
            if (node && node.kind === 151 /* TypeReference */) {
                var root = getFirstIdentifier(node.typeName);
                var meaning = root.parent.kind === 151 /* TypeReference */ ? 793056 /* Type */ : 1536 /* Namespace */;
                // Resolve type so we know which symbol is referenced
                var rootSymbol = resolveName(root, root.text, meaning | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
                // Resolved symbol is alias
                if (rootSymbol && rootSymbol.flags & 8388608 /* Alias */) {
                    var aliasTarget = resolveAlias(rootSymbol);
                    // If alias has value symbol - mark alias as referenced
                    if (aliasTarget.flags & 107455 /* Value */ && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
                        markAliasSymbolAsReferenced(rootSymbol);
                    }
                }
            }
        }
function checkTypeNodeAsExpression(node) {
            // When we are emitting type metadata for decorators, we need to try to check the type
            // as if it were an expression so that we can emit the type in a value position when we
            // serialize the type metadata.
            if (node && node.kind === 151 /* TypeReference */) {
                var root = getFirstIdentifier(node.typeName);
                var meaning = root.parent.kind === 151 /* TypeReference */ ? 793056 /* Type */ : 1536 /* Namespace */;
                // Resolve type so we know which symbol is referenced
                var rootSymbol = resolveName(root, root.text, meaning | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
                // Resolved symbol is alias
                if (rootSymbol && rootSymbol.flags & 8388608 /* Alias */) {
                    var aliasTarget = resolveAlias(rootSymbol);
                    // If alias has value symbol - mark alias as referenced
                    if (aliasTarget.flags & 107455 /* Value */ && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
                        markAliasSymbolAsReferenced(rootSymbol);
                    }
                }
            }
        }
Checks a type reference node as an expression.