#![crate_type = "lib"] // compile-flags: -O use std::slice::Windows; // CHECK-LABEL: @naive_string_search #[no_mangle] pub fn naive_string_search(haystack: &str, needle: &str) -> Option<usize> { if needle.is_empty() { return Some(0); } // CHECK-NOT: panic // CHECK-NOT: fail haystack .as_bytes() .windows(needle.len()) .position(|sub| sub == needle.as_bytes()) } // CHECK-LABEL: @next #[no_mangle] pub fn next<'a>(w: &mut Windows<'a, u32>) -> Option<&'a [u32]> { // CHECK-NOT: panic // CHECK-NOT: fail w.next() } // CHECK-LABEL: @next_back #[no_mangle] pub fn next_back<'a>(w: &mut Windows<'a, u32>) -> Option<&'a [u32]> { // CHECK-NOT: panic // CHECK-NOT: fail w.next_back() }