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[clang] Document the return value of __builtin_COLUMN #118360

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Dec 13, 2024
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[clang] Document the return value of __builtin_COLUMN #118360

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[clang] Document the return value of __builtin_COLUMN
GeorgeKA Dec 2, 2024
2f132e1
Updated the documentation link to the standard instead of cppreference
GeorgeKA Dec 10, 2024
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6 changes: 5 additions & 1 deletion clang/docs/LanguageExtensions.rst
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Expand Up @@ -4514,9 +4514,13 @@ default member initializer, the invocation point is the location of the
constructor or aggregate initialization used to create the object. Otherwise
the invocation point is the same as the location of the builtin.

When the invocation point of ``__builtin_FUNCTION`` is not a function scope the
When the invocation point of ``__builtin_FUNCTION`` is not a function scope, the
empty string is returned.

The builtin ``__builtin_COLUMN`` returns the offset from the start of the line,
beginning from column 1. `This may differ from other implementations.
<https://eel.is/c++draft/support.srcloc#tab:support.srcloc.current-row-3-column-2-sentence-2>`_

The builtin ``__builtin_source_location`` returns a pointer to constant static
data of type ``std::source_location::__impl``. This type must have already been
defined, and must contain exactly four fields: ``const char *_M_file_name``,
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