Struct VaList 

pub struct VaList<'a> { /* private fields */ }

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

A variable argument list, equivalent to va_list in C.

Implementations

impl<'f> VaList<'f>

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

where T: VaArgSafe,

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

Advance to and read the next variable argument.

Safety

This function is only sound to call when:

• there is a next variable argument available.
• the next argument’s type must be ABI-compatible with the type T.
• the next argument must have a properly initialized value of type T.

Calling this function with an incompatible type, an invalid value, or when there are no more variable arguments, is unsound.

Trait Implementations

impl<'f> Clone for VaList<'f>

fn clone(&self) -> VaList<'f>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for VaList<'_>

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

Formats the value using the given formatter.

impl<'f> Drop for VaList<'f>

fn drop(&mut self)

Executes the destructor for this type.