#![feature(crate_visibility_modifier)]
#![feature(associated_type_bounds)]
#![feature(rustc_attrs)]
+#![feature(int_error_matching)]
#![recursion_limit = "512"]
#[macro_use]
let error_str = match e.kind() {
IntErrorKind::PosOverflow => "`limit` is too large",
IntErrorKind::Empty => "`limit` must be a non-negative integer",
- IntErrorKind::InvalidDigit(_) => "not a valid integer",
- IntErrorKind::NegOverflow => bug!("`limit` should never underflow"),
+ IntErrorKind::InvalidDigit => "not a valid integer",
+ IntErrorKind::NegOverflow => {
+ bug!("`limit` should never negatively underflow")
+ }
IntErrorKind::Zero => bug!("zero is a valid `limit`"),
kind => bug!("unimplemented IntErrorKind variant: {:?}", kind),
};
#![feature(slice_ptr_get)]
#![feature(no_niche)] // rust-lang/rust#68303
#![feature(unsafe_block_in_unsafe_fn)]
+#![feature(int_error_matching)]
#![deny(unsafe_op_in_unsafe_fn)]
#[prelude_import]
/// # Example
///
/// ```
+/// #![feature(int_error_matching)]
+///
/// # fn main() {
/// if let Err(e) = i32::from_str_radix("a12", 10) {
/// println!("Failed conversion to i32: {:?}", e.kind());
/// }
/// # }
/// ```
-#[stable(feature = "int_error_matching", since = "1.47.0")]
+#[unstable(
+ feature = "int_error_matching",
+ reason = "it can be useful to match errors when making error messages \
+ for integer parsing",
+ issue = "22639"
+)]
#[derive(Debug, Clone, PartialEq, Eq)]
#[non_exhaustive]
pub enum IntErrorKind {
/// Value being parsed is empty.
///
/// Among other causes, this variant will be constructed when parsing an empty string.
- #[stable(feature = "int_error_matching", since = "1.47.0")]
Empty,
/// Contains an invalid digit in its context.
///
///
/// This variant is also constructed when a `+` or `-` is misplaced within a string
/// either on its own or in the middle of a number.
- #[stable(feature = "int_error_matching", since = "1.47.0")]
- InvalidDigit(#[stable(feature = "int_error_matching", since = "1.47.0")] char),
+ InvalidDigit,
/// Integer is too large to store in target integer type.
- #[stable(feature = "int_error_matching", since = "1.47.0")]
PosOverflow,
/// Integer is too small to store in target integer type.
- #[stable(feature = "int_error_matching", since = "1.47.0")]
NegOverflow,
/// Value was Zero
///
/// This variant will be emitted when the parsing string has a value of zero, which
/// would be illegal for non-zero types.
- #[stable(feature = "int_error_matching", since = "1.47.0")]
Zero,
}
impl ParseIntError {
/// Outputs the detailed cause of parsing an integer failing.
- #[stable(feature = "int_error_matching", since = "1.47.0")]
+ #[unstable(
+ feature = "int_error_matching",
+ reason = "it can be useful to match errors when making error messages \
+ for integer parsing",
+ issue = "22639"
+ )]
pub fn kind(&self) -> &IntErrorKind {
&self.kind
}
pub fn __description(&self) -> &str {
match self.kind {
IntErrorKind::Empty => "cannot parse integer from empty string",
- IntErrorKind::InvalidDigit(_) => "invalid digit found in string",
+ IntErrorKind::InvalidDigit => "invalid digit found in string",
IntErrorKind::PosOverflow => "number too large to fit in target type",
IntErrorKind::NegOverflow => "number too small to fit in target type",
IntErrorKind::Zero => "number would be zero for non-zero type",
#[stable(feature = "try_from", since = "1.34.0")]
pub use error::TryFromIntError;
-#[stable(feature = "int_error_matching", since = "1.47.0")]
+#[unstable(
+ feature = "int_error_matching",
+ reason = "it can be useful to match errors when making error messages \
+ for integer parsing",
+ issue = "22639"
+)]
pub use error::IntErrorKind;
macro_rules! usize_isize_to_xe_bytes_doc {
let (is_positive, digits) = match src[0] {
b'+' | b'-' if src[1..].is_empty() => {
- return Err(PIE { kind: InvalidDigit(src[0] as char) });
+ return Err(PIE { kind: InvalidDigit });
}
b'+' => (true, &src[1..]),
b'-' if is_signed_ty => (false, &src[1..]),
for &c in digits {
let x = match (c as char).to_digit(radix) {
Some(x) => x,
- None => return Err(PIE { kind: InvalidDigit(c as char) }),
+ None => return Err(PIE { kind: InvalidDigit }),
};
result = match result.checked_mul(radix) {
Some(result) => result,
for &c in digits {
let x = match (c as char).to_digit(radix) {
Some(x) => x,
- None => return Err(PIE { kind: InvalidDigit(c as char) }),
+ None => return Err(PIE { kind: InvalidDigit }),
};
result = match result.checked_mul(radix) {
Some(result) => result,
#![feature(try_trait)]
#![feature(slice_internals)]
#![feature(slice_partition_dedup)]
+#![feature(int_error_matching)]
#![feature(array_value_iter)]
#![feature(iter_partition_in_place)]
#![feature(iter_is_partitioned)]
assert_eq!("0".parse::<NonZeroU8>().err().map(|e| e.kind().clone()), Some(IntErrorKind::Zero));
assert_eq!(
"-1".parse::<NonZeroU8>().err().map(|e| e.kind().clone()),
- Some(IntErrorKind::InvalidDigit('-'))
+ Some(IntErrorKind::InvalidDigit)
);
assert_eq!(
"-129".parse::<NonZeroI8>().err().map(|e| e.kind().clone()),
#[test]
fn test_invalid() {
- test_parse::<i8>("--129", Err(IntErrorKind::InvalidDigit('-')));
- test_parse::<i8>("++129", Err(IntErrorKind::InvalidDigit('+')));
- test_parse::<u8>("Съешь", Err(IntErrorKind::InvalidDigit('Ð')));
- test_parse::<u8>("123Hello", Err(IntErrorKind::InvalidDigit('H')));
- test_parse::<i8>("--", Err(IntErrorKind::InvalidDigit('-')));
- test_parse::<i8>("-", Err(IntErrorKind::InvalidDigit('-')));
- test_parse::<i8>("+", Err(IntErrorKind::InvalidDigit('+')));
- test_parse::<u8>("-1", Err(IntErrorKind::InvalidDigit('-')));
+ test_parse::<i8>("--129", Err(IntErrorKind::InvalidDigit));
+ test_parse::<i8>("++129", Err(IntErrorKind::InvalidDigit));
+ test_parse::<u8>("Съешь", Err(IntErrorKind::InvalidDigit));
+ test_parse::<u8>("123Hello", Err(IntErrorKind::InvalidDigit));
+ test_parse::<i8>("--", Err(IntErrorKind::InvalidDigit));
+ test_parse::<i8>("-", Err(IntErrorKind::InvalidDigit));
+ test_parse::<i8>("+", Err(IntErrorKind::InvalidDigit));
+ test_parse::<u8>("-1", Err(IntErrorKind::InvalidDigit));
}
#[test]
#![feature(global_asm)]
#![feature(hashmap_internals)]
#![feature(int_error_internals)]
+#![feature(int_error_matching)]
#![feature(integer_atomics)]
#![feature(into_future)]
#![feature(lang_items)]
#[stable(feature = "nonzero", since = "1.28.0")]
pub use core::num::{NonZeroU128, NonZeroU16, NonZeroU32, NonZeroU64, NonZeroU8, NonZeroUsize};
-#[stable(feature = "int_error_matching", since = "1.47.0")]
+#[unstable(
+ feature = "int_error_matching",
+ reason = "it can be useful to match errors when making error messages \
+ for integer parsing",
+ issue = "22639"
+)]
pub use core::num::IntErrorKind;
#[cfg(test)]