Sitelet https://codeql.github.com/codeql-standard-libraries/cpp/predicate.float$copySign.1.html

CodeQL library for C/C++

codeql/cpp-all 12.0.3 (changelog, source)

Primitive predicate float::copySign

Returns the floating point number with the magnitude of the receiver and the sign of the argument.

float copySign(float sign)