b3f95f460f
Instead let's do this via `RUSTFLAGS` in `builder.rs`. Currently requires a submodule update of `stdarch` to fix a problem with previous compilers.
45 lines
1 KiB
Rust
45 lines
1 KiB
Rust
//! impl bool {}
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#[cfg(not(bootstrap))]
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#[lang = "bool"]
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impl bool {
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/// Returns `Some(t)` if the `bool` is `true`, or `None` otherwise.
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///
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/// # Examples
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///
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/// ```
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/// #![feature(bool_to_option)]
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///
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/// assert_eq!(false.then(0), None);
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/// assert_eq!(true.then(0), Some(0));
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/// ```
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#[unstable(feature = "bool_to_option", issue = "64260")]
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#[inline]
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pub fn then<T>(self, t: T) -> Option<T> {
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if self {
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Some(t)
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} else {
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None
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}
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}
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/// Returns `Some(f())` if the `bool` is `true`, or `None` otherwise.
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///
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/// # Examples
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///
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/// ```
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/// #![feature(bool_to_option)]
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///
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/// assert_eq!(false.then_with(|| 0), None);
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/// assert_eq!(true.then_with(|| 0), Some(0));
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/// ```
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#[unstable(feature = "bool_to_option", issue = "64260")]
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#[inline]
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pub fn then_with<T, F: FnOnce() -> T>(self, f: F) -> Option<T> {
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if self {
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Some(f())
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} else {
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None
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}
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}
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}
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