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rust-clippy/tests/ui/checked_conversions.rs

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Rust

// run-rustfix
#![allow(
clippy::cast_lossless,
// Int::max_value will be deprecated in the future
deprecated,
)]
#![warn(clippy::checked_conversions)]
use std::convert::TryFrom;
// Positive tests
// Signed to unsigned
pub fn i64_to_u32(value: i64) {
let _ = value <= (u32::max_value() as i64) && value >= 0;
let _ = value <= (u32::MAX as i64) && value >= 0;
}
pub fn i64_to_u16(value: i64) {
let _ = value <= i64::from(u16::max_value()) && value >= 0;
let _ = value <= i64::from(u16::MAX) && value >= 0;
}
pub fn isize_to_u8(value: isize) {
let _ = value <= (u8::max_value() as isize) && value >= 0;
let _ = value <= (u8::MAX as isize) && value >= 0;
}
// Signed to signed
pub fn i64_to_i32(value: i64) {
let _ = value <= (i32::max_value() as i64) && value >= (i32::min_value() as i64);
let _ = value <= (i32::MAX as i64) && value >= (i32::MIN as i64);
}
pub fn i64_to_i16(value: i64) {
let _ = value <= i64::from(i16::max_value()) && value >= i64::from(i16::min_value());
let _ = value <= i64::from(i16::MAX) && value >= i64::from(i16::MIN);
}
// Unsigned to X
pub fn u32_to_i32(value: u32) {
let _ = value <= i32::max_value() as u32;
let _ = value <= i32::MAX as u32;
}
pub fn usize_to_isize(value: usize) {
let _ = value <= isize::max_value() as usize && value as i32 == 5;
let _ = value <= isize::MAX as usize && value as i32 == 5;
}
pub fn u32_to_u16(value: u32) {
let _ = value <= u16::max_value() as u32 && value as i32 == 5;
let _ = value <= u16::MAX as u32 && value as i32 == 5;
}
// Negative tests
pub fn no_i64_to_i32(value: i64) {
let _ = value <= (i32::max_value() as i64) && value >= 0;
let _ = value <= (i32::MAX as i64) && value >= 0;
}
pub fn no_isize_to_u8(value: isize) {
let _ = value <= (u8::max_value() as isize) && value >= (u8::min_value() as isize);
let _ = value <= (u8::MAX as isize) && value >= (u8::MIN as isize);
}
pub fn i8_to_u8(value: i8) {
let _ = value >= 0;
}
fn main() {}