Boost spirit调试输出没有出现

Question

我正在尝试 this question 的第二个答案。解析本身工作正常，但在第一行取消注释 #define BOOST_SPIRIT_DEBUG 后，BOOST_SPIRIT_DEBUG 输出仍然没有出现在任何地方。

当我将下面的这 3 行添加到 main() 时，我看到所有 3 行都出现在我的终端中。但是，我没有看到任何解析器调试行。缺少什么？

std::cout << "Hello cout" << std::endl;
std::cerr << "Hello cerr" << std::endl;
BOOST_SPIRIT_DEBUG_OUT << "Hello boost spirit debug out" << std::endl;

可能值得一提我正在使用 Qt Creator。

Answer 1

我无法重现：

Live On Coliru

#define BOOST_SPIRIT_DEBUG
#include <boost/spirit/include/qi.hpp>

int main() {
    std::cout << "Hello cout" << std::endl;
    std::cerr << "Hello cerr" << std::endl;
    BOOST_SPIRIT_DEBUG_OUT << "Hello boost spirit debug out" << std::endl;
}

版画

Hello cout
Hello cerr
Hello boost spirit debug out

所以所有常见的罪魁祸首是：

构建过时
运行与构建的二进制文件不同的二进制文件
预编译 header毁了你的一天？当您在预编译 header 包含之前包含任何内容时，[在我知道的任何编译器中] 都会导致警告，但请注意以防万一。

这是链接的第二个答案演示 Live On Coliru with debug output (or without):

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</expr_>
input:  -99
eval:   -99

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input:  'string'
eval:   string

<expr_>
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</expr_>
input:  AnswerToLTUAE()
eval:   42

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</expr_>
input:  ReverseString('string')
eval:   gnirts

<expr_>
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</expr_>
input:  Concatenate('string', 987)
eval:   string987

<expr_>
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</expr_>
input:  Concatenate('The Answer Is ', AnswerToLTUAE())
eval:   The Answer Is 42

Boost spirit调试输出没有出现

Boost spirit debug output does not appear

c++

parsing

boost-spirit

qt-creator

output