Function checkGrammarAsyncModifier

test/fixtures/snapshot/typescript.js:88019–88028

(node, asyncModifier)

            return node.modifiers.length > 1 || node.modifiers[0].kind !== allowedModifier;
        }
        function checkGrammarAsyncModifier(node, asyncModifier) {
            switch (node.kind) {
                case 169 /* SyntaxKind.MethodDeclaration */:
                case 256 /* SyntaxKind.FunctionDeclaration */:
                case 213 /* SyntaxKind.FunctionExpression */:
                case 214 /* SyntaxKind.ArrowFunction */:
                    return false;
            }
            return grammarErrorOnNode(asyncModifier, ts.Diagnostics._0_modifier_cannot_be_used_here, "async");
        }
        function checkGrammarForDisallowedTrailingComma(list, diag) {
            if (diag === void 0) { diag = ts.Diagnostics.Trailing_comma_not_allowed; }
            if (list && list.hasTrailingComma) {