Builtin type std::prelude::bool

Boolean type

Methods

• fn max_value() -> bool

  source

  Returns true.

• fn min_value() -> bool

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  Returns false.

• fn then_some<T>(self: bool, value: T) -> Option<T>

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  Convert boolean into an Option with a given value.

  Returns Option::some(value) if the boolean is true, Option::none() otherwise.

  Example

  let o1 = true.then_some("hello");
  let o2 = false.then_some("world");
  
  assert_eq!(o1, Option::some("hello"));
  assert_eq!(o2, Option::none());
  Run this example

• fn then<T, F>(self: bool, func: F) -> Option<T>

  F: Fn() -> T

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  Convert boolean into an Option with a value provided by a closure.

  Returns Option::some(func()) if the boolean is true, Option::none() otherwise.

  Example

  let o1 = true.then(|| -> &[u8] { "hello" });
  let o2 = false.then(|| -> &[u8] { "hello" });
  
  assert_eq!(o1, Option::some("hello"));
  assert_eq!(o2, Option::none());
  Run this example

• fn equals(lhs: &bool, rhs: &bool) -> bool

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  Returns true if arguments are equal, false otherwise

  See Equatable for details.

• fn compare(lhs: &bool, rhs: &bool) -> Ordering

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  Compare the value

  See Comparable for details.

• fn hash<H>(self: &bool, hasher: &mut H)

  H: Hasher<H>

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  Update hasher state with the contents of this object.

  See Hashable for details.

• fn fmt<F>(self: &bool, formatter: &mut F) -> Result<(), Error>

  F: Formatter<F>

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  Write the object into a given formatter.

  See Formattable for details.

Mixins

• mixin Equatable<bool>

• fn not_equals(lhs: &Self, rhs: &Self) -> bool

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  Returns false if arguments are equal, true otherwise

• mixin Comparable<u8>

• fn less_than(lhs: &Self, rhs: &Self) -> bool

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  Returns true if lhs is strictly less than rhs, false otherwise

• fn less_than_or_equal(lhs: &Self, rhs: &Self) -> bool

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  Returns true if lhs is less or equal to rhs, false otherwise

• fn greater_than(lhs: &Self, rhs: &Self) -> bool

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  Returns true if lhs strictly greater than rhs, false otherwise

• fn greater_than_or_equal(lhs: &Self, rhs: &Self) -> bool

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  Returns true if lhs greater than or equal rhs, false otherwise