Function mergeModuleAugmentation

test/fixtures/snapshot/typescript.js:49272–49330

(moduleName)

            });
        }
        function mergeModuleAugmentation(moduleName) {
            var _a, _b, _c;
            var moduleAugmentation = moduleName.parent;
            if (((_a = moduleAugmentation.symbol.declarations) === null || _a === void 0 ? void 0 : _a[0]) !== moduleAugmentation) {
                // this is a combined symbol for multiple augmentations within the same file.
                // its symbol already has accumulated information for all declarations
                // so we need to add it just once - do the work only for first declaration
                ts.Debug.assert(moduleAugmentation.symbol.declarations.length > 1);
                return;
            }
            if (ts.isGlobalScopeAugmentation(moduleAugmentation)) {
                mergeSymbolTable(globals, moduleAugmentation.symbol.exports);
            }
            else {
                // find a module that about to be augmented
                // do not validate names of augmentations that are defined in ambient context
                var moduleNotFoundError = !(moduleName.parent.parent.flags & 16777216 /* NodeFlags.Ambient */)
                    ? ts.Diagnostics.Invalid_module_name_in_augmentation_module_0_cannot_be_found
                    : undefined;
                var mainModule_1 = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError, /*isForAugmentation*/ true);
                if (!mainModule_1) {
                    return;
                }
                // obtain item referenced by 'export='
                mainModule_1 = resolveExternalModuleSymbol(mainModule_1);
                if (mainModule_1.flags & 1920 /* SymbolFlags.Namespace */) {
                    // If we're merging an augmentation to a pattern ambient module, we want to
                    // perform the merge unidirectionally from the augmentation ('a.foo') to
                    // the pattern ('*.foo'), so that 'getMergedSymbol()' on a.foo gives you
                    // all the exports both from the pattern and from the augmentation, but
                    // 'getMergedSymbol()' on *.foo only gives you exports from *.foo.
                    if (ts.some(patternAmbientModules, function (module) { return mainModule_1 === module.symbol; })) {
                        var merged = mergeSymbol(moduleAugmentation.symbol, mainModule_1, /*unidirectional*/ true);
                        if (!patternAmbientModuleAugmentations) {
                            patternAmbientModuleAugmentations = new ts.Map();
                        }
                        // moduleName will be a StringLiteral since this is not `declare global`.
                        patternAmbientModuleAugmentations.set(moduleName.text, merged);
                    }
                    else {
                        if (((_b = mainModule_1.exports) === null || _b === void 0 ? void 0 : _b.get("__export" /* InternalSymbolName.ExportStar */)) && ((_c = moduleAugmentation.symbol.exports) === null || _c === void 0 ? void 0 : _c.size)) {
                            // We may need to merge the module augmentation's exports into the target symbols of the resolved exports
                            var resolvedExports = getResolvedMembersOrExportsOfSymbol(mainModule_1, "resolvedExports" /* MembersOrExportsResolutionKind.resolvedExports */);
                            for (var _i = 0, _d = ts.arrayFrom(moduleAugmentation.symbol.exports.entries()); _i < _d.length; _i++) {
                                var _e = _d[_i], key = _e[0], value = _e[1];
                                if (resolvedExports.has(key) && !mainModule_1.exports.has(key)) {
                                    mergeSymbol(resolvedExports.get(key), value);
                                }
                            }
                        }
                        mergeSymbol(mainModule_1, moduleAugmentation.symbol);
                    }
                }
                else {
                    // moduleName will be a StringLiteral since this is not `declare global`.
                    error(moduleName, ts.Diagnostics.Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity, moduleName.text);
                }
            }