ParseIntError in core::num - Rust (original) (raw)
Struct ParseIntError
1.6.0 · Source
pub struct ParseIntError { /* private fields */ }Expand description
An error which can be returned when parsing an integer.
This error is used as the error type for the from_str_radix() functions on the primitive integer types, such as i8::from_str_radix.
§Potential causes
Among other causes, ParseIntError can be thrown because of leading or trailing whitespace in the string e.g., when it is obtained from the standard input. Using the str::trim() method ensures that no whitespace remains before parsing.
§Example
if let Err(e) = i32::from_str_radix("a12", 10) {
println!("Failed conversion to i32: {e}");
}1.55.0 (const: 1.82.0) · Source
Outputs the detailed cause of parsing an integer failing.
👎Deprecated since 1.42.0: use the Display impl or to_string()
Returns the lower-level source of this error, if any. Read more
👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting
🔬This is a nightly-only experimental API. (error_generic_member_access #99301)
Provides type-based access to context intended for error reports. Read more
Tests for self and other values to be equal, and is used by ==.
Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.