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: VaArgSafe>(&mut self) -> T

🔬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 Clone for VaList<'_>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

where Self:,

Performs copy-assignment from source.

impl Debug for VaList<'_>

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

Formats the value using the given formatter.

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

fn drop(&mut self)

Executes the destructor for this type.