By trying to build re2c on Windows, using MSVS 2017 I faced the compile-time error: C2039: 'isalnum': is not a member of 'std'. This PR fixes this issue.
By the way I added a small fix of using this function: in order to avoid UB (which may occur in some situations, see links below) the argument should be passed by preliminary converting it to unsigned char. More info about this issue:
skvadrik
commented
3 years ago
Hi,
By trying to build re2c on Windows, using MSVS 2017 I faced the compile-time error: C2039: 'isalnum': is not a member of 'std'. This PR fixes this issue.
By the way I added a small fix of using this function: in order to avoid UB (which may occur in some situations, see links below) the argument should be passed by preliminary converting it to unsigned char. More info about this issue: