Macro uom::storage_types

source[−]
macro_rules! storage_types {
    ($(#[$attr : meta]) * types : $($T : ident), + ; $($tt : tt) *) => { ... };
    ($(#[$attr : meta]) * pub types : $($T : ident), + ; $($tt : tt) *) => { ... };
    (@ types $attr : tt @ $M : ident $($T : ident), + ; $tt : tt) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident usize($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident u8($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident u16($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident u32($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident u64($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident u128($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident isize($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident i8($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident i16($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident i32($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident i64($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident i128($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident BigInt($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident BigUint($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident Rational($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident Rational32($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident Rational64($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident BigRational($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident f32($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident f64($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident All($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident PrimInt($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident Ratio($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident Float($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident Signed($($tt : tt) *)) => { ... };
    (@ type($(#[$attr : meta]) *) @ $M : ident Unsigned($($tt : tt) *)) => { ... };
    (@ mod($(#[$attr : meta]) *) $M : ident, $V : ty ; ($($tt : tt) *)) => { ... };
    (@ pub_mod($(#[$attr : meta]) *) $M : ident, $V : ty ; ($($tt : tt) *)) => { ... };
    ($($tt : tt) *) => { ... };
}
Expand description

Macro to duplicate code on a per-storage type basis. The given code is duplicated in new modules named for each storage type. A type alias, V, is generated that code can use for the type. @... match arms are considered private.

  • $attr: Module attributes. Generally used to set documentation comments for storage type modules generated by the macro.
  • $T: Types to generate a module for. Accepts all underlying storage types along with a number of different categories:
    • All: usize, u8, u16, u32, u64, u128, isize, i8, i16, i32, i64, i128, BigInt, BigUint, Rational, Rational32, Rational64, BigRational, f32, and f64.
    • PrimInt: usize, u8, u16, u32, u64, u128, isize, i8, i16, i32, i64, and i128.
    • Ratio: Rational, Rational32, Rational64, and BigRational.
    • Float: f32 and f64.
    • Signed: isize, i8, i16, i32, i64, i128, BigInt, Rational, Rational32, Rational64, BigRational, f32, and f64.
    • Unsigned: usize, u8, u16, u32, u64, u128, and BigUint.
  • $tt: Code to place into each storage type module.
#[macro_use]
extern crate uom;

fn main() {
   f32::do_work(1.234_f32);
   f64::do_work(1.234_f64);
}

storage_types! {
   /// Type modules.
   pub types: Float;

   pub fn do_work(_v: V) {}
}