std_unicode::char::from_u32 - Rust
Description: API documentation for the Rust `from_u32` fn in crate `std_unicode`.
Keywords: rust, rustlang, rust-lang, from_u32

# Function std_unicode::char::from_u32 1.0.0 [−] [src]

    pub fn from_u32(i: u32) -> Option<char>

Converts a `u32` to a `char`.

Note that all `char`s are valid `u32`s, and can be casted to one with `as`:

    let c = '💯';
    let i = c as u32;

    assert_eq!(128175, i);Run

However, the reverse is not true: not all valid `u32`s are valid `char`s. `from_u32()` will return `None` if the input is not a valid value for a `char`.

For an unsafe version of this function which ignores these checks, see `from_u32_unchecked`.

# Examples

Basic usage:

    use std::char;

    let c = char::from_u32(0x2764);

    assert_eq!(Some('❤'), c);Run

Returning `None` when the input is not a valid `char`:

    use std::char;

    let c = char::from_u32(0x110000);

    assert_eq!(None, c);Run

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