Fix some RangeInclusive test cases.
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@ -10,12 +10,18 @@
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// Test inclusive range syntax.
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// Test inclusive range syntax.
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use std::ops::{RangeInclusive, RangeToInclusive};
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#![feature(range_is_empty)]
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#![allow(unused_comparisons)]
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use std::ops::RangeToInclusive;
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fn foo() -> isize { 42 }
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fn foo() -> isize { 42 }
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// Test that range syntax works in return statements
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// Test that range syntax works in return statements
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fn return_range_to() -> RangeToInclusive<i32> { return ..=1; }
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pub fn return_range_to() -> RangeToInclusive<i32> { return ..=1; }
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#[derive(Debug)]
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struct P(u8);
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pub fn main() {
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pub fn main() {
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let mut count = 0;
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let mut count = 0;
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@ -26,7 +32,7 @@ pub fn main() {
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assert_eq!(count, 55);
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assert_eq!(count, 55);
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let mut count = 0;
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let mut count = 0;
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let mut range = 0_usize..=10;
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let range = 0_usize..=10;
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for i in range {
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for i in range {
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assert!(i >= 0 && i <= 10);
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assert!(i >= 0 && i <= 10);
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count += i;
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count += i;
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@ -80,7 +86,7 @@ pub fn main() {
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short.next();
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short.next();
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assert_eq!(long.size_hint(), (255, Some(255)));
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assert_eq!(long.size_hint(), (255, Some(255)));
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assert_eq!(short.size_hint(), (0, Some(0)));
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assert_eq!(short.size_hint(), (0, Some(0)));
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assert_eq!(short, 1..=0);
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assert!(short.is_empty());
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assert_eq!(long.len(), 255);
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assert_eq!(long.len(), 255);
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assert_eq!(short.len(), 0);
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assert_eq!(short.len(), 0);
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@ -95,28 +101,31 @@ pub fn main() {
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for i in 3..=251 {
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for i in 3..=251 {
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assert_eq!(long.next(), Some(i));
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assert_eq!(long.next(), Some(i));
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}
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}
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assert_eq!(long, 1..=0);
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assert!(long.is_empty());
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// check underflow
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// check underflow
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let mut narrow = 1..=0;
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let mut narrow = 1..=0;
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assert_eq!(narrow.next_back(), None);
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assert_eq!(narrow.next_back(), None);
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assert_eq!(narrow, 1..=0);
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assert!(narrow.is_empty());
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let mut zero = 0u8..=0;
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let mut zero = 0u8..=0;
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assert_eq!(zero.next_back(), Some(0));
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assert_eq!(zero.next_back(), Some(0));
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assert_eq!(zero.next_back(), None);
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assert_eq!(zero.next_back(), None);
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assert_eq!(zero, 1..=0);
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assert!(zero.is_empty());
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let mut high = 255u8..=255;
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let mut high = 255u8..=255;
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assert_eq!(high.next_back(), Some(255));
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assert_eq!(high.next_back(), Some(255));
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assert_eq!(high.next_back(), None);
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assert_eq!(high.next_back(), None);
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assert_eq!(high, 1..=0);
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assert!(high.is_empty());
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// what happens if you have a nonsense range?
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// what happens if you have a nonsense range?
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let mut nonsense = 10..=5;
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let mut nonsense = 10..=5;
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assert_eq!(nonsense.next(), None);
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assert_eq!(nonsense.next(), None);
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assert_eq!(nonsense, 10..=5);
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assert!(nonsense.is_empty());
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// output
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// output
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assert_eq!(format!("{:?}", 0..=10), "0..=10");
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assert_eq!(format!("{:?}", 0..=10), "0..=10");
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assert_eq!(format!("{:?}", ..=10), "..=10");
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assert_eq!(format!("{:?}", ..=10), "..=10");
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assert_eq!(format!("{:?}", long), "1..=0");
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assert_eq!(format!("{:?}", 9..=6), "9..=6");
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// ensure that constructing a RangeInclusive does not need PartialOrd bound
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assert_eq!(format!("{:?}", P(1)..=P(2)), "P(1)..=P(2)");
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}
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}
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