Macro collect_mac::collect
[−]
[src]
macro_rules! collect { (@count_tts $($tts:tt)*) => { ... }; (@replace_expr $_tt:tt $sub:expr) => { ... }; (@collect ty: $col_ty:ty, es: [$v0:expr, $($vs:expr),* $(,)*], // `cb` is an expression that is inserted after each "step" in constructing the collection. It largely exists for testing purposes. cb: ($col:ident) $cb:expr, ) => { ... }; [] => { ... }; [as $col_ty:ty] => { ... }; [as $col_ty:ty:] => { ... }; [as $col_ty:ty: $v0:expr] => { ... }; [as $col_ty:ty: $v0:expr, $($vs:expr),* $(,)*] => { ... }; [as $col_ty:ty: $($ks:expr => $vs:expr),+ $(,)*] => { ... }; [$($vs:expr),+ $(,)*] => { ... }; [$($ks:expr => $vs:expr),+ $(,)*] => { ... }; }
This macro can be used to easily construct arbitrary collections, including Vec
, String
, and HashMap
. It also endeavours to construct the collection with a single allocation, where possible.
For more details, see the crate documentation.