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cppdraft/csetjmp/syn.md

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+[csetjmp.syn]
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+# 17 Language support library [[support]](./#support)
+
+## 17.14 Other runtime support [[support.runtime]](support.runtime#csetjmp.syn)
+
+### 17.14.3 Header <csetjmp> synopsis [csetjmp.syn]
+
+[🔗](#lib:jmp_buf)
+
+#define __STDC_VERSION_SETJMP_H__ 202311Lnamespace std {using jmp_buf = *see below*; [[noreturn]] void longjmp(jmp_buf env, int val);}#define setjmp(env) *see below*
+
+[1](#1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/support.tex#L6431)
+
+The contents of the header <csetjmp> are the same as the C
+standard library header [<setjmp.h>](support.c.headers.general#header:%3csetjmp.h%3e "17.15.1 General [support.c.headers.general]")[.](#1.sentence-1)
+
+[2](#2)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/support.tex#L6435)
+
+The function signaturelongjmp(jmp_buf jbuf, int val) has more restricted behavior in this document[.](#2.sentence-1)
+
+A setjmp/longjmp call pair has undefined
+behavior if replacing the setjmp and longjmp by catch and throw would invoke any non-trivial destructors for any objects
+with automatic storage duration[.](#2.sentence-2)
+
+A call to setjmp or longjmp has undefined
+behavior if invoked in a suspension context of a coroutine ([[expr.await]](expr.await "7.6.2.4 Await"))[.](#2.sentence-3)
+
+See also: ISO/IEC 9899:2024, 7.13