Function checkModuleDeclaration

test/fixtures/snapshot/typescript.js:84927–85018

(node)

            }
        }
        function checkModuleDeclaration(node) {
            if (node.body) {
                checkSourceElement(node.body);
                if (!ts.isGlobalScopeAugmentation(node)) {
                    registerForUnusedIdentifiersCheck(node);
                }
            }
            addLazyDiagnostic(checkModuleDeclarationDiagnostics);
            function checkModuleDeclarationDiagnostics() {
                // Grammar checking
                var isGlobalAugmentation = ts.isGlobalScopeAugmentation(node);
                var inAmbientContext = node.flags & 16777216 /* NodeFlags.Ambient */;
                if (isGlobalAugmentation && !inAmbientContext) {
                    error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context);
                }
                var isAmbientExternalModule = ts.isAmbientModule(node);
                var contextErrorMessage = isAmbientExternalModule
                    ? ts.Diagnostics.An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file
                    : ts.Diagnostics.A_namespace_declaration_is_only_allowed_at_the_top_level_of_a_namespace_or_module;
                if (checkGrammarModuleElementContext(node, contextErrorMessage)) {
                    // If we hit a module declaration in an illegal context, just bail out to avoid cascading errors.
                    return;
                }
                if (!checkGrammarDecoratorsAndModifiers(node)) {
                    if (!inAmbientContext && node.name.kind === 10 /* SyntaxKind.StringLiteral */) {
                        grammarErrorOnNode(node.name, ts.Diagnostics.Only_ambient_modules_can_use_quoted_names);
                    }
                }
                if (ts.isIdentifier(node.name)) {
                    checkCollisionsForDeclarationName(node, node.name);
                }
                checkExportsOnMergedDeclarations(node);
                var symbol = getSymbolOfNode(node);
                // The following checks only apply on a non-ambient instantiated module declaration.
                if (symbol.flags & 512 /* SymbolFlags.ValueModule */
                    && !inAmbientContext
                    && symbol.declarations
                    && symbol.declarations.length > 1
                    && isInstantiatedModule(node, ts.shouldPreserveConstEnums(compilerOptions))) {
                    var firstNonAmbientClassOrFunc = getFirstNonAmbientClassOrFunctionDeclaration(symbol);
                    if (firstNonAmbientClassOrFunc) {
                        if (ts.getSourceFileOfNode(node) !== ts.getSourceFileOfNode(firstNonAmbientClassOrFunc)) {
                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged);
                        }
                        else if (node.pos < firstNonAmbientClassOrFunc.pos) {
                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged);
                        }
                    }
                    // if the module merges with a class declaration in the same lexical scope,
                    // we need to track this to ensure the correct emit.
                    var mergedClass = ts.getDeclarationOfKind(symbol, 257 /* SyntaxKind.ClassDeclaration */);
                    if (mergedClass &&
                        inSameLexicalScope(node, mergedClass)) {
                        getNodeLinks(node).flags |= 32768 /* NodeCheckFlags.LexicalModuleMergesWithClass */;
                    }
                }
                if (isAmbientExternalModule) {
                    if (ts.isExternalModuleAugmentation(node)) {