tmp/tmpmfg6n2_a/{from.md → to.md}
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### Header `<cstdarg>` synopsis <a id="cstdarg.syn">[[cstdarg.syn]]</a>
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``` cpp
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// all freestanding
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namespace std {
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using va_list = see below;
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}
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#define va_arg(V, P) see below
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#define va_copy(VDST, VSRC) see below
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#define va_end(V) see below
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#define va_start(V,
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```
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The contents of the header `<cstdarg>` are the same as the C standard
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library header `<stdarg.h>`, with the following changes:
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- In lieu of the default argument promotions specified in ISO
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the definition in [[expr.call]] applies.
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- The
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`va_start`
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before the `...`).[^33] If the parameter `parmN` is a pack expansion
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[[temp.variadic]] or an entity resulting from a lambda capture
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[[expr.prim.lambda]], the program is ill-formed, no diagnostic
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required. If the parameter `parmN` is of a reference type, or of a
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type that is not compatible with the type that results when passing an
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argument for which there is no parameter, the behavior is undefined.
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See also: ISO C 7.16
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### Header `<cstdarg>` synopsis <a id="cstdarg.syn">[[cstdarg.syn]]</a>
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``` cpp
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// all freestanding
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#define __STDC_VERSION_STDARG_H__ 202311L
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namespace std {
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using va_list = see below;
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}
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#define va_arg(V, P) see below
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#define va_copy(VDST, VSRC) see below
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#define va_end(V) see below
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#define va_start(V, ...) see below
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```
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The contents of the header `<cstdarg>` are the same as the C standard
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library header `<stdarg.h>`, with the following changes:
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- In lieu of the default argument promotions specified in ISO/IEC
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9899:2018 (C) 6.5.3.3, the definition in [[expr.call]] applies.
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- The preprocessing tokens comprising the second and subsequent
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arguments to `va_start` (if any) are discarded. \[*Note 1*: `va_start`
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accepts a second argument for compatibility with prior revisions of
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C++. — *end note*]
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See also: ISO C 7.16
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