Struct core::ffi::VaList

#[repr(transparent)]
pub struct VaList<'a, 'f: 'a> { /* fields omitted */ }

🔬 This is a nightly-only experimental API. (c_variadic #44930)

the c_variadic feature has not been properly tested on all supported platforms

A wrapper for a va_list

Methods from Deref<Target = VaListImpl<'f>>

pub fn as_va_list<'a>(&'a mut self) -> VaList<'a, 'f>

🔬 This is a nightly-only experimental API. (c_variadic #44930)

the c_variadic feature has not been properly tested on all supported platforms

This is supported on non-AArch64 and non-PowerPC and non-x86-64, or AArch64 and (macOS or iOS), or WebAssembly, or JavaScript, or Windows only.

Convert a VaListImpl into a VaList that is binary-compatible with C’s va_list.

pub unsafe fn arg<T: VaArgSafe>(&mut self) -> T

🔬 This is a nightly-only experimental API. (c_variadic #44930)

the c_variadic feature has not been properly tested on all supported platforms

Advance to the next arg.

pub unsafe fn with_copy<F, R>(&self, f: F) -> R where
    F: for<'copy> FnOnce(VaList<'copy, 'f>) -> R, 

🔬 This is a nightly-only experimental API. (c_variadic #44930)

the c_variadic feature has not been properly tested on all supported platforms

Copies the va_list at the current location.

Trait Implementations

impl<'a, 'f: 'a> Debug for VaList<'a, 'f>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a, 'f: 'a> Deref for VaList<'a, 'f>

type Target = VaListImpl<'f>

The resulting type after dereferencing.

fn deref(&self) -> &VaListImpl<'f>

Dereferences the value.

impl<'a, 'f: 'a> DerefMut for VaList<'a, 'f>

fn deref_mut(&mut self) -> &mut VaListImpl<'f>

Mutably dereferences the value.