mirror of https://github.com/rust-lang/rust
115 lines
3.1 KiB
Rust
115 lines
3.1 KiB
Rust
#![allow(overlapping_range_endpoints)]
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#![allow(non_contiguous_range_endpoints)]
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#![deny(unreachable_patterns)]
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macro_rules! m {
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($s:expr, $t1:pat, $t2:pat) => {
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match $s {
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$t1 => {}
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$t2 => {}
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_ => {}
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}
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};
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}
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#[rustfmt::skip]
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fn main() {
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m!(0u8, 42, 41);
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m!(0u8, 42, 42); //~ ERROR unreachable pattern
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m!(0u8, 42, 43);
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m!(0u8, 20..=30, 19);
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m!(0u8, 20..=30, 20); //~ ERROR unreachable pattern
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m!(0u8, 20..=30, 21); //~ ERROR unreachable pattern
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m!(0u8, 20..=30, 25); //~ ERROR unreachable pattern
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m!(0u8, 20..=30, 29); //~ ERROR unreachable pattern
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m!(0u8, 20..=30, 30); //~ ERROR unreachable pattern
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m!(0u8, 20..=30, 31);
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m!(0u8, 20..30, 19);
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m!(0u8, 20..30, 20); //~ ERROR unreachable pattern
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m!(0u8, 20..30, 21); //~ ERROR unreachable pattern
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m!(0u8, 20..30, 25); //~ ERROR unreachable pattern
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m!(0u8, 20..30, 29); //~ ERROR unreachable pattern
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m!(0u8, 20..30, 30);
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m!(0u8, 20..30, 31);
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m!(0u8, 20..=30, 20..=30); //~ ERROR unreachable pattern
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m!(0u8, 20.. 30, 20.. 30); //~ ERROR unreachable pattern
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m!(0u8, 20..=30, 20.. 30); //~ ERROR unreachable pattern
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m!(0u8, 20..=30, 19..=30);
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m!(0u8, 20..=30, 21..=30); //~ ERROR unreachable pattern
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m!(0u8, 20..=30, 20..=29); //~ ERROR unreachable pattern
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m!(0u8, 20..=30, 20..=31);
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m!('a', 'A'..='z', 'a'..='z'); //~ ERROR unreachable pattern
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match 0u8 {
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5 => {},
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6 => {},
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7 => {},
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8 => {},
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5..=8 => {}, //~ ERROR unreachable pattern
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_ => {},
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}
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match 0u8 {
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0..10 => {},
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10..20 => {},
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5..15 => {}, //~ ERROR unreachable pattern
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_ => {},
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}
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match 0u8 {
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0..10 => {},
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10..20 => {},
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20..30 => {},
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5..25 => {}, //~ ERROR unreachable pattern
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_ => {},
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}
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match 0u8 {
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0..10 => {},
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10 => {},
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11..=23 => {},
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19..30 => {},
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5..25 => {}, //~ ERROR unreachable pattern
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_ => {},
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}
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match 0usize {
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0..10 => {},
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10..20 => {},
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5..15 => {}, //~ ERROR unreachable pattern
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_ => {},
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}
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// Chars between '\u{D7FF}' and '\u{E000}' are invalid even though ranges that contain them are
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// allowed.
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match 'a' {
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_ => {},
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'\u{D7FF}'..='\u{E000}' => {}, //~ ERROR unreachable pattern
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}
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match 'a' {
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'\u{0}'..='\u{D7FF}' => {},
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'\u{E000}'..='\u{10_FFFF}' => {},
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'\u{D7FF}'..='\u{E000}' => {}, //~ ERROR unreachable pattern
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}
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match (0u8, true) {
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(0..=255, false) => {}
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(0..=255, true) => {} // ok
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}
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match (true, 0u8) {
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(false, 0..=255) => {}
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(true, 0..=255) => {} // ok
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}
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const FOO: i32 = 42;
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const BAR: &i32 = &42;
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match &0 {
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&42 => {}
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&FOO => {} //~ ERROR unreachable pattern
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BAR => {} //~ ERROR unreachable pattern
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_ => {}
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}
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// Regression test, see https://github.com/rust-lang/rust/pull/66326#issuecomment-552889933
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match &0 {
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BAR => {} // ok
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_ => {}
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}
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}
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