Can g Handle Unicode Characters in Identifiers?

Unicode Characters in Identifiers: Support in g

Despite the availability of the -fextended-identifiers option, g versions up to 4.8 do not allow the use of characters outside the Basic Multilingual Plane (BMP) in identifiers. This includes characters such as the emoji ?.

The standard allows characters in the range 10000-1FFFD as part of identifiers, but g 's support is limited to a smaller set of characters defined in the ucnid.tab file.

The -fextended-identifiers option is experimental and has varying support across different g versions. Starting from version 4.9.0, g supports the C11 character set, which includes the U0001F603 emoji used in the second code example.

However, even in g 8.2, using the ? emoji in an identifier results in an error. This suggests that full support for Unicode characters in identifiers may not be available in all configurations.

Other compilers, such as Clang 3.3, provide better support for Unicode characters in identifiers. Both code examples provided work without any additional options when compiled with Clang using the -std=c 11 standard.

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