Adrian Adrian - 3 months ago 15
C++ Question

Can clang format add braces to single line if statements etc

Is there an option for clang-format to add braces to all if()/do/while statements etc?

eg

if( i == 42 )
std::cout << "You found the meaning of life\n";
else
std::cout << "Wrong!\n";


to

if( i == 42 )
{
std::cout << "You found the meaning of life\n";
}
else
{
std::cout << "Wrong!\n";
}


Using

$ clang-format --version
clang-format version 3.6.0

Answer

clang-tidy can make syntactic changes to your code using FIXITS

clang-tidy YOUR_FILE.cpp -fix -checks="readability-braces-around-statements" -- COMPILE_OPTIONS

Updated:

clang-tidy is a bit of a heavyweight tool for this as it needs compile options to parse the file, sadly clang-format (as of v3.9) won't add braces.

COMPILE_OPTIONS would be the include paths etc that you use to compile the file with, ie -std=c++14 -stdlib=libc++ -O2 -I.

If you have a compile_options.json file from CMake then you can pass the path of the directory it is contained in to clang-tidy and it will look up the appropriate compile options for the file:

clang-tidy YOUR_FILE.cpp -fix -checks="readability-braces-around-statements" -p COMPILE_OPTIONS_DIR
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