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Language

C++

Compiler

clang HEAD 12.0.0 (https://github.com/llvm/llvm-project.git b268e24d4349d586334dd6f47aa99b2196b1046e)

Options
Warnings
Boost 1.73.0
C++2a(GNU)
no pedantic
Raw compiler options
-Wdouble-promotion

$ clang++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.73.0/clang-head/include -std=gnu++2a -Wdouble-promotion
prog.cc:4:9: warning: implicit conversion increases floating-point precision: 'float' to 'double' [-Wdouble-promotion]
    if( f == 0.0 ) return 1;
        ^ ~~
1 warning generated.
Exit Code:
0