fmt/test/CMakeLists.txt

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CMake
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# Test if compile errors are produced where necessary.
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cmake_minimum_required(VERSION 2.8)
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include(CheckCXXSourceCompiles)
set(CMAKE_REQUIRED_INCLUDES ${CMAKE_CURRENT_SOURCE_DIR}/..)
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function (expect_compile_error code)
check_cxx_source_compiles("
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#include \"format.cc\"
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int main() {
${code}
}
" compiles)
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set (does_compile ${compiles})
# Unset the CMake cache variable compiles. Otherwise the compile test will
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# just use cached information next time it runs.
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unset(compiles CACHE)
if (does_compile)
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message(FATAL_ERROR "No compile error for: ${code}")
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endif ()
endfunction ()
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# Array is noncopyable.
expect_compile_error("fmt::internal::Array<char, 5> a, b(a);")
expect_compile_error("fmt::internal::Array<char, 5> a, b; b = a;")
# Writer is noncopyable.
expect_compile_error("fmt::Writer a, b(a);")
expect_compile_error("fmt::Writer a, b; b = a;")
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# Formatter is not copyable from a temporary.
expect_compile_error("fmt::Formatter<> a(fmt::Formatter<>(\"a\"));")
expect_compile_error("fmt::Formatter<> b(\"a\"); b = fmt::Formatter<>(\"b\");")
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# Writing a wide character to a character stream Writer is forbidden.
expect_compile_error("fmt::Writer() << L'a';")
expect_compile_error("fmt::Writer() << fmt::pad(\"abc\", 5, L' ');")
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expect_compile_error("fmt::Writer() << fmt::pad(42, 5, L' ');")
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# Formatting a wide character with a narrow format string is forbidden.
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expect_compile_error("fmt::Format(\"{}\") << L'a';")
# There is no implicit conversion from FILE* to FileSink.
expect_compile_error("fmt::FileSink fs = 0;")