Crate helper

Helper

A library provided some useful proc macros for Rust.

Macros

• control flow

  • either: Ternary operator in many C-like languages.

• collections

  • btmap: Create std::collections::BTreeMap from list of key-value pairs.
  • btset: Create a std::collections::BTreeSet from a list of elements.
  • hmap: Create std::collections::HashMap from list of key-value pairs.
  • hset: Create a std::collections::HashSet from a list of elements.

• type conversion

  • u8: Convert expression to u8 type.
  • u16: Convert expression to u16 type.
  • u32: Convert expression to u32 type.
  • u64: Convert expression to u64 type.
  • u128: Convert expression to u128 type.
  • usize: Convert expression to usize type.
  • i8: Convert expression to i8 type.
  • i16: Convert expression to i16 type.
  • i32: Convert expression to i32 type.
  • i64: Convert expression to i64 type.
  • i128: Convert expression to i128 type.
  • isize: Convert expression to isize type.
  • f32: Convert expression to f32 type.
  • f64: Convert expression to f64 type.
  • char: Convert expression to char type.
  • bool: Convert expression to bool type.

Examples

Type Conversion

use helper::*;

let x = 42i32;
let y = u8!(x);      // Convert to u8
let z = f64!(x);     // Convert to f64

// Support complex expressions
let result = u64!(x + 10 * 2);

// Support chained conversions
let chained = f64!(i64!(u32!(x)));

// Character conversion
let ascii_value = 65u8;
let character = char!(ascii_value);  // 'A'

Collections

use helper::*;

// HashMap
let map = hmap! {
    "key1": "value1",
    "key2": "value2",
};

// HashSet
let set = hset! { 1, 2, 3 };

// BTreeMap
let btree_map = btmap! {
    "a": 1,
    "b": 2,
};

// BTreeSet
let btree_set = btset! { 1, 2, 3 };

License

MulanPSL-2.0

Macros

bool

Convert expression to bool type.

btmap

Create std::collections::BTreeMap from list of key-value pairs.

btset

Create a std::collections::BTreeSet from a list of elements.

char

Convert expression to char type.

either

Ternary operator in many C-like languages.

f32

Convert expression to f32 type.

f64

Convert expression to f64 type.

hmap

Create std::collections::HashMap from list of key-value pairs.

hset

Create a std::collections::HashSet from a list of elements.

i8

Convert expression to i8 type.

i16

Convert expression to i16 type.

i32

Convert expression to i32 type.

i64

Convert expression to i64 type.

i128

Convert expression to i128 type.

isize

Convert expression to isize type.

u8

Convert expression to u8 type.

u16

Convert expression to u16 type.

u32

Convert expression to u32 type.

u64

Convert expression to u64 type.

u128

Convert expression to u128 type.

usize

Convert expression to usize type.