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Diffstat (limited to '')
-rw-r--r-- | src/tools/clippy/tests/ui/implicit_saturating_sub.rs | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/implicit_saturating_sub.rs b/src/tools/clippy/tests/ui/implicit_saturating_sub.rs new file mode 100644 index 000000000..8bb28d149 --- /dev/null +++ b/src/tools/clippy/tests/ui/implicit_saturating_sub.rs @@ -0,0 +1,214 @@ +// run-rustfix +#![allow(unused_assignments, unused_mut, clippy::assign_op_pattern)] +#![warn(clippy::implicit_saturating_sub)] + +fn main() { + // Tests for unsigned integers + + let end_8: u8 = 10; + let start_8: u8 = 5; + let mut u_8: u8 = end_8 - start_8; + + // Lint + if u_8 > 0 { + u_8 = u_8 - 1; + } + + match end_8 { + 10 => { + // Lint + if u_8 > 0 { + u_8 -= 1; + } + }, + 11 => u_8 += 1, + _ => u_8 = 0, + } + + let end_16: u16 = 40; + let start_16: u16 = 35; + + let mut u_16: u16 = end_16 - start_16; + + // Lint + if u_16 > 0 { + u_16 -= 1; + } + + let mut end_32: u32 = 7010; + let mut start_32: u32 = 7000; + + let mut u_32: u32 = end_32 - start_32; + + // Lint + if u_32 != 0 { + u_32 -= 1; + } + + // No Lint + if u_32 > 0 { + u_16 += 1; + } + + // No Lint + if u_32 != 0 { + end_32 -= 1; + start_32 += 1; + } + + let mut end_64: u64 = 75001; + let mut start_64: u64 = 75000; + + let mut u_64: u64 = end_64 - start_64; + + // Lint + if u_64 > 0 { + u_64 -= 1; + } + + // Lint + if 0 < u_64 { + u_64 -= 1; + } + + // Lint + if 0 != u_64 { + u_64 -= 1; + } + + // No Lint + if u_64 >= 1 { + u_64 -= 1; + } + + // No Lint + if u_64 > 0 { + end_64 -= 1; + } + + // Tests for usize + let end_usize: usize = 8054; + let start_usize: usize = 8050; + + let mut u_usize: usize = end_usize - start_usize; + + // Lint + if u_usize > 0 { + u_usize -= 1; + } + + // Tests for signed integers + + let endi_8: i8 = 10; + let starti_8: i8 = 50; + + let mut i_8: i8 = endi_8 - starti_8; + + // Lint + if i_8 > i8::MIN { + i_8 -= 1; + } + + // Lint + if i_8 > i8::MIN { + i_8 -= 1; + } + + // Lint + if i_8 != i8::MIN { + i_8 -= 1; + } + + // Lint + if i_8 != i8::MIN { + i_8 -= 1; + } + + let endi_16: i16 = 45; + let starti_16: i16 = 44; + + let mut i_16: i16 = endi_16 - starti_16; + + // Lint + if i_16 > i16::MIN { + i_16 -= 1; + } + + // Lint + if i_16 > i16::MIN { + i_16 -= 1; + } + + // Lint + if i_16 != i16::MIN { + i_16 -= 1; + } + + // Lint + if i_16 != i16::MIN { + i_16 -= 1; + } + + let endi_32: i32 = 45; + let starti_32: i32 = 44; + + let mut i_32: i32 = endi_32 - starti_32; + + // Lint + if i_32 > i32::MIN { + i_32 -= 1; + } + + // Lint + if i_32 > i32::MIN { + i_32 -= 1; + } + + // Lint + if i_32 != i32::MIN { + i_32 -= 1; + } + + // Lint + if i_32 != i32::MIN { + i_32 -= 1; + } + + let endi_64: i64 = 45; + let starti_64: i64 = 44; + + let mut i_64: i64 = endi_64 - starti_64; + + // Lint + if i64::MIN < i_64 { + i_64 -= 1; + } + + // Lint + if i64::MIN != i_64 { + i_64 -= 1; + } + + // Lint + if i64::MIN < i_64 { + i_64 -= 1; + } + + // No Lint + if i_64 > 0 { + i_64 -= 1; + } + + // No Lint + if i_64 != 0 { + i_64 -= 1; + } + + // issue #7831 + // No Lint + if u_32 > 0 { + u_32 -= 1; + } else { + println!("side effect"); + } +} |