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Is there an easy way to remove comments from a C/C++ source file without doing any preprocessing. (ie, I think you can use gcc -E but this will expand macros.) I just want the source code with comments stripped, nothing else should be changed.
EDIT:
Preference towards an existing tool. I don't want to have to write this myself with regexes, I foresee too many surprises in the code.
923
Remove comments in a string using C++ The string '\' denotes the line comment, which means the string next to it on the right will be ignored by the program. The string '\* and *\' is a multiline comment representing the string starting from '\* till the *\' will be ignored.
A token can be an identifier, a literal value, a reserved word, or an operator. Comments and whitespace are mostly ignored during this phase. They are only used to separate different tokens. In the next steps, there is no concept for a comment or a whitespace, so yes, they are removed while compiling.
Single-line comments start with two forward slashes ( // ). Any text between // and the end of the line is ignored by the compiler (will not be executed).
Run the following command on your source file:
gcc -fpreprocessed -dD -E test.c Thanks to KennyTM for finding the right flags. Here’s the result for completeness:
test.c:
#define foo bar foo foo foo #ifdef foo #undef foo #define foo baz #endif foo foo /* comments? comments. */ // c++ style comments gcc -fpreprocessed -dD -E test.c:
#define foo bar foo foo foo #ifdef foo #undef foo #define foo baz #endif foo foo If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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