c++ - C++ “expected primary-expression before ‘(’ token ”错误

Question

我有以下代码:

FILE *f = fopen(intPath, "r");
Node *n;
if (f) {
    try {
        n = parse(f, intPath);
    } catch (SyntaxError e) {
        fclose(f); /***** line 536 *****/
        throw LangException(
            builtin_classes::exception_class::create_ImportError(
                String::fromAscii(e.filename)->
                append(String::fromAscii(":"))->
                append(String::fromInt(e.line))->
                append(String::fromAscii(":"))->
                append(String::fromInt(e.col))->
                append(String::fromAscii(": syntax error: "))->
                append(String::fromAscii(e.message))
        );
    }
    fclose(f);
    return n->eval(scope);
} else {
    throw LangException(
        builtin_classes::exception_class::create_ImportError(
            String::fromAscii("failed to open file for reading")
        ),
        line,
        col
    );
}

并且编译器给出此错误:

nodes.cpp:537:40: error: expected primary-expression before ‘(’ token
nodes.cpp:544:94: error: expected ‘)’ before ‘;’ token

我不知道这可能是什么，特别是因为该代码示例包含另一个执行相同操作的语句，并且不会引起错误。

Answer 1

throw LangException(
   builtin_classes::exception_class::create_ImportError(
      String::fromAscii(e.filename)->
      append(String::fromAscii(":"))->
      append(String::fromInt(e.line))->
      append(String::fromAscii(":"))->
      append(String::fromInt(e.col))->
      append(String::fromAscii(": syntax error: "))->
      append(String::fromAscii(e.message))
   )  // This closes the function call
; // You didn't close the throw here!