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731 B
[alt.headers]
16 Library introduction [library]
16.4 Library-wide requirements [requirements]
16.4.5 Constraints on programs [constraints]
16.4.5.4 Headers [alt.headers]
If a file with a name equivalent to the derived file name for one of the C++ standard library headers is not provided as part of the implementation, and a file with that name is placed in any of the standard places for a source file to be included, the behavior is undefined.