Function visitExportDeclaration

test/fixtures/snapshot/typescript.js:93884–93903

* Visits an export declaration, eliding it if it does not contain a clause that resolves to a value. * * @param node The export declaration node.

(node)

         * @param node The export declaration node.
         */
        function visitExportDeclaration(node) {
            if (node.isTypeOnly) {
                return undefined;
            }
            if (!node.exportClause || ts.isNamespaceExport(node.exportClause)) {
                // never elide `export <whatever> from <whereever>` declarations -
                // they should be kept for sideffects/untyped exports, even when the
                // type checker doesn't know about any exports
                return node;
            }
            // Elide the export declaration if all of its named exports are elided.
            var allowEmpty = !!node.moduleSpecifier && (compilerOptions.importsNotUsedAsValues === 1 /* ImportsNotUsedAsValues.Preserve */ ||
                compilerOptions.importsNotUsedAsValues === 2 /* ImportsNotUsedAsValues.Error */);
            var exportClause = ts.visitNode(node.exportClause, function (bindings) { return visitNamedExportBindings(bindings, allowEmpty); }, ts.isNamedExportBindings);
            return exportClause
                ? factory.updateExportDeclaration(node, 
                /*decorators*/ undefined, 
                /*modifiers*/ undefined, node.isTypeOnly, exportClause, node.moduleSpecifier, node.assertClause)
                : undefined;
        }
        /**
         * Visits named exports, eliding it if it does not contain an export specifier that
         * resolves to a value.