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Cast to unsigned char when using std::isalnum

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std::isalnum expects an int in the range of unsigned char or -1 (EOF),
otherwise it exhibits undefined behavior. Casting from char to unsigned
char avoids this.

MSVC warns about this when compiling with /analyze.
This commit is contained in:
Ian Hattendorf
2018-04-28 23:23:30 -07:00
committed by Martin Hořeňovský
parent 9e7c281e6e
commit 88a6ff0b65
1 changed files with 1 additions and 1 deletions
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2
include/internal/catch_test_case_info.cpp
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@@ -37,7 +37,7 @@ namespace Catch {
return TestCaseInfo::None;
}
bool isReservedTag( std::string const& tag ) {
return parseSpecialTag( tag ) == TestCaseInfo::None && tag.size() > 0 && !std::isalnum( tag[0] );
return parseSpecialTag( tag ) == TestCaseInfo::None && tag.size() > 0 && !std::isalnum( static_cast<unsigned char>(tag[0]) );
}
void enforceNotReservedTag( std::string const& tag, SourceLineInfo const& _lineInfo ) {
CATCH_ENFORCE( !isReservedTag(tag),