29 lines
644 B
Rust
29 lines
644 B
Rust
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use std::marker::PhantomData;
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pub struct NfaBuilder<'brand> {
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brand: PhantomData<&'brand mut &'brand mut ()>,
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}
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impl NfaBuilder<'_> {
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pub fn with<R, F: FnOnce(NfaBuilder<'_>) -> R>(f: F) -> R {
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Brand::with(|brand| {
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f(Self { brand: brand.lt })
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//~^ ERROR lifetime may not live long enough
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//~| ERROR lifetime may not live long enough
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})
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}
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}
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#[derive(Clone, Copy)]
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pub struct Brand<'brand> {
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lt: PhantomData<&'brand mut &'brand mut ()>,
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}
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impl Brand<'_> {
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pub fn with<R, F: FnOnce(Brand<'_>) -> R>(f: F) -> R {
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f(Self { lt: PhantomData })
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}
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}
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fn main() {}
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