Annex C (informative) Compatibility [diff]

C.5 C++ and ISO C++ 2017 [diff.cpp17]

C.5.11 [algorithms]: algorithms library [diff.cpp17.alg.reqs]

Affected subclause: [algorithms.requirements]
Change: The number and order of deducible template parameters for algorithm declarations is now unspecified, instead of being as-declared.

Rationale: Increase implementor freedom and allow some function templates to be implemented as function objects with templated call operators.

Effect on original feature: A valid C++ 2017 program that passes explicit template arguments to algorithms not explicitly specified to allow such in this version of C++ may fail to compile or have undefined behavior.