On AppleClang 14.0.0, this code...
#include <iostream>
#define EXPECT_EQ(x, y)
int main() {
const int foo = 6'765;
std::cout << foo << '\n';
EXPECT_EQ(6'765, 6'765);
}
...causes a compile error:
test/src/main.cpp:8:19: warning: missing terminating ' character [-Winvalid-pp-token]
const int foo = 6'765;
^
test/src/main.cpp:8:19: error: expected ';' at end of declaration
const int foo = 6'765;
^
;
test/src/main.cpp:10:24: error: too few arguments provided to function-like macro invocation
EXPECT_EQ(6'765, 6'765);
^
test/src/main.cpp:5:9: note: macro 'EXPECT_EQ' defined here
#define EXPECT_EQ(x, y)
^
test/src/main.cpp:10:2: error: use of undeclared identifier 'EXPECT_EQ'
EXPECT_EQ(6'765, 6'765);
^
With clang-16 out, clang-format now supports IntegerLiteralSeparator, which actively adds these digit separators on a codebase: https://clang.llvm.org/docs/ClangFormatStyleOptions.html#integerliteralseparator
By the way, according to cppreference.com, AppleClang should be supporting this: https://en.cppreference.com/w/cpp/compiler_support/14
Is this issue just for me, or does AppleClang really not work with these integer literal separators at the moment?
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