动态格式化 README

轻量级、动态、Python 风格的字符串格式化（仅支持 String，{key} 模式）。它只需要 std 就可以工作。

转义如 {{ 或 }}。

安装

cargo add [email protected]

示例

use dyn_formatting::dynamic_format;
assert_eq!(
    dynamic_format(
        "I'm {name}. I'm {age} years old now.",
        &[("name", "ABC"), ("age", "20")].into()
    ).unwrap(),
    "I'm ABC. I'm 20 years old now.".to_string()
);

use dyn_formatting::dynamic_format;
use std::collections::HashMap;
let value_age = (15).to_string(); // Make lifetime long enough
let dictionary = HashMap::from([
    ("age", value_age.as_str()),
]);
assert_eq!(
    dynamic_format("{{{age} }}{age}", &dictionary).unwrap(),
    "{15 }15"
)

use dyn_formatting::dynamic_format;
assert!(
    dynamic_format(
        "I'm {name}. I'm {age} years old now.",
        &[("name", "ABC")].into()
    ).is_err() // Key error
);

use dyn_formatting::dynamic_format;
assert!(
    dynamic_format(
        "I'm {name{name}}.",
        &[("name", "ABC")].into()
    ).is_err() // Token error: '{' unmatched.
);