Struct jomini::Scalar

source · [−]
pub struct Scalar<'a> { /* private fields */ }
Expand description

A byte slice that represents a single value.

A scalars does not carry with it an encoding, so an appropriate encoder must be used if text is wished to be extracted from a scalar

use jomini::Scalar;

let v1 = Scalar::new(b"10");
assert_eq!(v1.to_u64(), Ok(10));
assert_eq!(v1.to_i64(), Ok(10));
assert_eq!(v1.to_f64(), Ok(10.0));
assert!(v1.to_bool().is_err());

Implementations

Create a new scalar backed by a byte slice

View the raw data

Try converting the scalar to f64

use jomini::Scalar;

let v1 = Scalar::new(b"1.000");
assert_eq!(v1.to_f64(), Ok(1.0));

let v2 = Scalar::new(b"-5.67821");
assert_eq!(v2.to_f64(), Ok(-5.67821));

Try converting the scalar to boolean, only “yes” and “no” can be mapped:

use jomini::Scalar;

let v1 = Scalar::new(b"yes");
assert_eq!(v1.to_bool(), Ok(true));

let v2 = Scalar::new(b"no");
assert_eq!(v2.to_bool(), Ok(false));

Try converting the scalar to i64

use jomini::Scalar;

let v1 = Scalar::new(b"-50");
assert_eq!(v1.to_i64(), Ok(-50));

let v2 = Scalar::new(b"120");
assert_eq!(v2.to_i64(), Ok(120));

Try converting the scalar to u64

use jomini::Scalar;

let v1 = Scalar::new(b"50");
assert_eq!(v1.to_i64(), Ok(50));

let v2 = Scalar::new(b"120");
assert_eq!(v2.to_i64(), Ok(120));

Returns if the scalar contains only ascii values

use jomini::Scalar;

let v1 = Scalar::new(b"a");
assert!(v1.is_ascii());

let v2 = Scalar::new(&[255][..]);
assert!(!v2.is_ascii());

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Formats the value using the given formatter. Read more

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.

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

🔬 This is a nightly-only experimental API. (toowned_clone_into)

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.