[PATCH] D124033: [NFC] Adding a note about the macro __FLT_EVAL_METHOD__

[Zahira Ammarguellat via Phabricator via cfe-commits]

zahiraam created this revision.
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This is to clarify  that the macro __FLT_EVAL_METHOD__   it is not pre-defined like other preprocessor macros. It will not appear when preprocessor macros are dumped.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D124033

Files:
  clang/docs/UsersManual.rst


Index: clang/docs/UsersManual.rst
===================================================================
--- clang/docs/UsersManual.rst
+++ clang/docs/UsersManual.rst
@@ -1609,10 +1609,13 @@
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 The macro ``__FLT_EVAL_METHOD__`` will expand to either the value set from the
 command line option ``ffp-eval-method`` or to the value from the target info
-setting. The ``__FLT_EVAL_METHOD__`` macro cannot expand to the correct
-evaluation method in the presence of a ``#pragma`` which alters the evaluation
-method. An error is issued if ``__FLT_EVAL_METHOD__`` is expanded inside a scope
-modified by ``#pragma clang fp eval_method``.
+setting. The ``__FLT_EVAL_METHOD__`` macro is resolved as a macro
+definition during expansion. When predefined preprocessor macros are dumped,
+``__FLT_EVAL_METHOD__`` will not be listed.
+The ``__FLT_EVAL_METHOD__`` macro cannot expand to the correct evaluation method
+in the presence of a ``#pragma`` which alters the evaluation method. An error is
+issued if ``__FLT_EVAL_METHOD__`` is expanded inside a scope modified by
+``#pragma clang fp eval_method``.
 
 .. _fp-constant-eval:
 


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