Struct std::ffi::VaList

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

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

va_list 的包装

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

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

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

将 VaListImpl 转换为与 C 的 va_list 二进制兼容的 VaList。

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

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

前进到下一个 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)

在当前位置复制 va_list。

Trait Implementations

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

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

使用给定的格式化程序格式化该值。

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

type Target = VaListImpl<'f>

解引用后的结果类型。

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

解引用值。

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

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

可变地解引用该值。