expand

宏，用于展开字节数组和字符串字面量

文档

使用说明

use expand::expand;

// expanding a byte string
assert_eq!(
    &expand!([@b"Hello,", b' ', @b"world", b'!']),
    b"Hello, world!"
);

// expanding a string
assert_eq!(
    expand!(vec![@"Hello,", ' ', @"world", '!']),
    "Hello, world!".chars().collect::<Vec<char>>(),
);

// pattern matching
if let expand!([@b"patt", x, y, b'n', ..]) = b"pattern matching" {
    assert_eq!(x, &b'e');
    assert_eq!(y, &b'r');
} else {
    panic!("pattern matching failed");
}

// more pattern matching
if let expand!([@b"msg = \"", xs @ .., b'"']) = br#"msg = "Hello, world!""# {
    assert_eq!(xs, b"Hello, world!");
} else {
    panic!("pattern matching failed");
}

变更日志

查看 CHANGELOG.md