Function visitModuleDeclaration

test/fixtures/snapshot/typescript.js:93668–93728

* Visits a module declaration node. * * This function will be called any time a TypeScript namespace (ModuleDeclaration) is encountered. * * @param node The module declaration node.

(node)

         * @param node The module declaration node.
         */
        function visitModuleDeclaration(node) {
            if (!shouldEmitModuleDeclaration(node)) {
                return factory.createNotEmittedStatement(node);
            }
            ts.Debug.assertNode(node.name, ts.isIdentifier, "A TypeScript namespace should have an Identifier name.");
            enableSubstitutionForNamespaceExports();
            var statements = [];
            // We request to be advised when the printer is about to print this node. This allows
            // us to set up the correct state for later substitutions.
            var emitFlags = 2 /* EmitFlags.AdviseOnEmitNode */;
            // If needed, we should emit a variable declaration for the module. If we emit
            // a leading variable declaration, we should not emit leading comments for the
            // module body.
            var varAdded = addVarForEnumOrModuleDeclaration(statements, node);
            if (varAdded) {
                // We should still emit the comments if we are emitting a system module.
                if (moduleKind !== ts.ModuleKind.System || currentLexicalScope !== currentSourceFile) {
                    emitFlags |= 512 /* EmitFlags.NoLeadingComments */;
                }
            }
            // `parameterName` is the declaration name used inside of the namespace.
            var parameterName = getNamespaceParameterName(node);
            // `containerName` is the expression used inside of the namespace for exports.
            var containerName = getNamespaceContainerName(node);
            // `exportName` is the expression used within this node's container for any exported references.
            var exportName = ts.hasSyntacticModifier(node, 1 /* ModifierFlags.Export */)
                ? factory.getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, /*allowComments*/ false, /*allowSourceMaps*/ true)
                : factory.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
            //  x || (x = {})
            //  exports.x || (exports.x = {})
            var moduleArg = factory.createLogicalOr(exportName, factory.createAssignment(exportName, factory.createObjectLiteralExpression()));
            if (hasNamespaceQualifiedExportName(node)) {
                // `localName` is the expression used within this node's containing scope for any local references.
                var localName = factory.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
                //  x = (exports.x || (exports.x = {}))
                moduleArg = factory.createAssignment(localName, moduleArg);
            }
            //  (function (x_1) {
            //      x_1.y = ...;
            //  })(x || (x = {}));
            var moduleStatement = factory.createExpressionStatement(factory.createCallExpression(factory.createFunctionExpression(
            /*modifiers*/ undefined, 
            /*asteriskToken*/ undefined, 
            /*name*/ undefined, 
            /*typeParameters*/ undefined, [factory.createParameterDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, parameterName)], 
            /*type*/ undefined, transformModuleBody(node, containerName)), 
            /*typeArguments*/ undefined, [moduleArg]));
            ts.setOriginalNode(moduleStatement, node);
            if (varAdded) {
                // If a variable was added, synthetic comments are emitted on it, not on the moduleStatement.
                ts.setSyntheticLeadingComments(moduleStatement, undefined);
                ts.setSyntheticTrailingComments(moduleStatement, undefined);
            }
            ts.setTextRange(moduleStatement, node);
            ts.addEmitFlags(moduleStatement, emitFlags);
            statements.push(moduleStatement);
            // Add a DeclarationMarker for the namespace to preserve trailing comments and mark
            // the end of the declaration.