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use ::std for tolower #86
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Some C++ compilers don't export C functions into `::` scope. This makes `tolower` accessible to those compilers. Also, add `include <cctype>` to make sure we are pulling in a header that contains it. References: * https://en.cppreference.com/w/cpp/header#C_compatibility_headers * http://www.cplusplus.com/reference/cctype/
Codecov Report
@@ Coverage Diff @@
## master #86 +/- ##
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Coverage 94.85% 94.85%
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Files 2 2
Lines 680 680
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Hits 645 645
Misses 35 35
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Some C++ compilers don't export C functions into
::scope. This makestoloweraccessible to those compilers.Reference: https://en.cppreference.com/w/cpp/header#C_compatibility_headers