[cpp.pragma]

# 15 Preprocessing directives [[cpp]](./#cpp)

## 15.10 Pragma directive [cpp.pragma]

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/preprocessor.tex#L2148)

A preprocessing directive of the form

# pragma [*pp-tokens*](cpp.pre#nt:pp-tokens "15.1 Preamble [cpp.pre]")opt [*new-line*](cpp.pre#nt:new-line "15.1 Preamble [cpp.pre]")

causes the implementation to behave
in an implementation-defined manner[.](#1.sentence-1)

The behavior may cause translation to fail or cause the translator or
the resulting program to behave in a non-conforming manner[.](#1.sentence-2)

Any pragma that is not recognized by the implementation is ignored[.](#1.sentence-3)