Function checkAliasSymbol

test/fixtures/snapshot/typescript.js:85134–85200

(node)

            return true;
        }
        function checkAliasSymbol(node) {
            var symbol = getSymbolOfNode(node);
            var target = resolveAlias(symbol);
            if (target !== unknownSymbol) {
                // For external modules, `symbol` represents the local symbol for an alias.
                // This local symbol will merge any other local declarations (excluding other aliases)
                // and symbol.flags will contains combined representation for all merged declaration.
                // Based on symbol.flags we can compute a set of excluded meanings (meaning that resolved alias should not have,
                // otherwise it will conflict with some local declaration). Note that in addition to normal flags we include matching SymbolFlags.Export*
                // in order to prevent collisions with declarations that were exported from the current module (they still contribute to local names).
                symbol = getMergedSymbol(symbol.exportSymbol || symbol);
                var excludedMeanings = (symbol.flags & (111551 /* SymbolFlags.Value */ | 1048576 /* SymbolFlags.ExportValue */) ? 111551 /* SymbolFlags.Value */ : 0) |
                    (symbol.flags & 788968 /* SymbolFlags.Type */ ? 788968 /* SymbolFlags.Type */ : 0) |
                    (symbol.flags & 1920 /* SymbolFlags.Namespace */ ? 1920 /* SymbolFlags.Namespace */ : 0);
                if (target.flags & excludedMeanings) {
                    var message = node.kind === 275 /* SyntaxKind.ExportSpecifier */ ?
                        ts.Diagnostics.Export_declaration_conflicts_with_exported_declaration_of_0 :
                        ts.Diagnostics.Import_declaration_conflicts_with_local_declaration_of_0;
                    error(node, message, symbolToString(symbol));
                }
                if (compilerOptions.isolatedModules
                    && !ts.isTypeOnlyImportOrExportDeclaration(node)
                    && !(node.flags & 16777216 /* NodeFlags.Ambient */)) {
                    var typeOnlyAlias = getTypeOnlyAliasDeclaration(symbol);
                    var isType = !(target.flags & 111551 /* SymbolFlags.Value */);
                    if (isType || typeOnlyAlias) {
                        switch (node.kind) {
                            case 267 /* SyntaxKind.ImportClause */:
                            case 270 /* SyntaxKind.ImportSpecifier */:
                            case 265 /* SyntaxKind.ImportEqualsDeclaration */: {
                                if (compilerOptions.preserveValueImports) {
                                    ts.Debug.assertIsDefined(node.name, "An ImportClause with a symbol should have a name");
                                    var message = isType
                                        ? ts.Diagnostics._0_is_a_type_and_must_be_imported_using_a_type_only_import_when_preserveValueImports_and_isolatedModules_are_both_enabled
                                        : ts.Diagnostics._0_resolves_to_a_type_only_declaration_and_must_be_imported_using_a_type_only_import_when_preserveValueImports_and_isolatedModules_are_both_enabled;
                                    var name = ts.idText(node.kind === 270 /* SyntaxKind.ImportSpecifier */ ? node.propertyName || node.name : node.name);
                                    addTypeOnlyDeclarationRelatedInfo(error(node, message, name), isType ? undefined : typeOnlyAlias, name);
                                }
                                if (isType && node.kind === 265 /* SyntaxKind.ImportEqualsDeclaration */ && ts.hasEffectiveModifier(node, 1 /* ModifierFlags.Export */)) {
                                    error(node, ts.Diagnostics.Cannot_use_export_import_on_a_type_or_type_only_namespace_when_the_isolatedModules_flag_is_provided);
                                }
                                break;
                            }
                            case 275 /* SyntaxKind.ExportSpecifier */: {
                                // Don't allow re-exporting an export that will be elided when `--isolatedModules` is set.
                                // The exception is that `import type { A } from './a'; export { A }` is allowed
                                // because single-file analysis can determine that the export should be dropped.
                                if (ts.getSourceFileOfNode(typeOnlyAlias) !== ts.getSourceFileOfNode(node)) {
                                    var message = isType
                                        ? ts.Diagnostics.Re_exporting_a_type_when_the_isolatedModules_flag_is_provided_requires_using_export_type
                                        : ts.Diagnostics._0_resolves_to_a_type_only_declaration_and_must_be_re_exported_using_a_type_only_re_export_when_isolatedModules_is_enabled;
                                    var name = ts.idText(node.propertyName || node.name);
                                    addTypeOnlyDeclarationRelatedInfo(error(node, message, name), isType ? undefined : typeOnlyAlias, name);
                                    return;
                                }
                            }
                        }
                    }