ParseIntError in std::num - Rust (original) (raw)

Struct ParseIntError

1.0.0

pub struct ParseIntError { /* private fields */ }

Expand description

An error which can be returned when parsing an integer.

For example, this error is returned by the from_str_radix() functions on the primitive integer types (such as i8::from_str_radix) and is used as the error type in their FromStr implementations.

§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)

Outputs the detailed cause of parsing an integer failing.

1.0.0§

Returns a duplicate of the value. Read more

1.0.0§

Performs copy-assignment from source. Read more

1.0.0§

Formats the value using the given formatter. Read more

1.0.0§

Formats the value using the given formatter. Read more

1.0.0§

1.30.0§

Returns the lower-level source of this error, if any. Read more

1.0.0§

👎Deprecated since 1.42.0: use the Display impl or to_string()

1.0.0§

👎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

1.0.0§

Tests for self and other values to be equal, and is used by ==.

1.0.0§

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

1.0.0§

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

🔬This is a nightly-only experimental API. (clone_to_uninit #126799)

Performs copy-assignment from self to dest. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of[From](../convert/trait.From.html "trait std::convert::From")<T> for U chooses to do.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

Uses borrowed data to replace owned data, usually by cloning. Read more

Converts the given value to a String. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.