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179 lines
3.2 KiB
Rust
179 lines
3.2 KiB
Rust
// run-pass
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// Tests that match expression handles overlapped literal and range
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// properly in the presence of guard function.
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fn val() -> usize { 1 }
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static CONST: usize = 1;
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pub fn main() {
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lit_shadow_range();
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range_shadow_lit();
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range_shadow_range();
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multi_pats_shadow_lit();
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multi_pats_shadow_range();
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lit_shadow_multi_pats();
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range_shadow_multi_pats();
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misc();
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}
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fn lit_shadow_range() {
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assert_eq!(2, match 1 {
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1 if false => 1,
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1..=2 => 2,
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_ => 3
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});
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let x = 0;
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assert_eq!(2, match x+1 {
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0 => 0,
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1 if false => 1,
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1..=2 => 2,
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_ => 3
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});
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assert_eq!(2, match val() {
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1 if false => 1,
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1..=2 => 2,
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_ => 3
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});
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assert_eq!(2, match CONST {
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0 => 0,
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1 if false => 1,
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1..=2 => 2,
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_ => 3
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});
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// value is out of the range of second arm, should match wildcard pattern
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assert_eq!(3, match 3 {
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1 if false => 1,
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1..=2 => 2,
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_ => 3
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});
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}
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fn range_shadow_lit() {
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assert_eq!(2, match 1 {
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1..=2 if false => 1,
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1 => 2,
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_ => 3
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});
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let x = 0;
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assert_eq!(2, match x+1 {
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0 => 0,
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1..=2 if false => 1,
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1 => 2,
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_ => 3
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});
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assert_eq!(2, match val() {
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1..=2 if false => 1,
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1 => 2,
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_ => 3
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});
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assert_eq!(2, match CONST {
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0 => 0,
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1..=2 if false => 1,
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1 => 2,
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_ => 3
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});
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// ditto
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assert_eq!(3, match 3 {
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1..=2 if false => 1,
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1 => 2,
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_ => 3
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});
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}
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fn range_shadow_range() {
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assert_eq!(2, match 1 {
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0..=2 if false => 1,
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1..=3 => 2,
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_ => 3,
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});
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let x = 0;
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assert_eq!(2, match x+1 {
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100 => 0,
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0..=2 if false => 1,
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1..=3 => 2,
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_ => 3,
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});
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assert_eq!(2, match val() {
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0..=2 if false => 1,
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1..=3 => 2,
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_ => 3,
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});
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assert_eq!(2, match CONST {
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100 => 0,
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0..=2 if false => 1,
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1..=3 => 2,
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_ => 3,
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});
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// ditto
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assert_eq!(3, match 5 {
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0..=2 if false => 1,
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1..=3 => 2,
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_ => 3,
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});
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}
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fn multi_pats_shadow_lit() {
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assert_eq!(2, match 1 {
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100 => 0,
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0 | 1..=10 if false => 1,
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1 => 2,
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_ => 3,
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});
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}
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fn multi_pats_shadow_range() {
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assert_eq!(2, match 1 {
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100 => 0,
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0 | 1..=10 if false => 1,
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1..=3 => 2,
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_ => 3,
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});
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}
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fn lit_shadow_multi_pats() {
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assert_eq!(2, match 1 {
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100 => 0,
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1 if false => 1,
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0 | 1..=10 => 2,
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_ => 3,
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});
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}
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fn range_shadow_multi_pats() {
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assert_eq!(2, match 1 {
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100 => 0,
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1..=3 if false => 1,
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0 | 1..=10 => 2,
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_ => 3,
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});
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}
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fn misc() {
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enum Foo {
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Bar(#[allow(unused_tuple_struct_fields)] usize, bool)
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}
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// This test basically mimics how trace_macros! macro is implemented,
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// which is a rare combination of vector patterns, multiple wild-card
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// patterns and guard functions.
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let r = match [Foo::Bar(0, false)] {
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[Foo::Bar(_, pred)] if pred => 1,
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[Foo::Bar(_, pred)] if !pred => 2,
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_ => 0,
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};
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assert_eq!(2, r);
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}
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