Bool

The Bool type represents boolean values: true and false. Booleans are used in conditionals, pattern matching, and logical operations.

Literals

true / false

Bool

The two boolean literal values.

is-active? = true
is-disabled? = false

println is-active?
# => true

Operators

and / &&

Bool -> Bool -> Bool

Logical AND. Returns true only if both operands are true. Short-circuits: if the first operand is false, the second is not evaluated.

println (true && true)     # => true
println (true && false)    # => false
println (false && true)    # => false

or / ||

Bool -> Bool -> Bool

Logical OR. Returns true if either operand is true. Short-circuits: if the first operand is true, the second is not evaluated.

println (true || false)     # => true
println (false || true)     # => true
println (false || false)    # => false

not / !

Bool -> Bool

Logical NOT. Returns the opposite boolean value.

println (not true)     # => false
println (not false)    # => true
println (!true)        # => false

Comparison

Bool.eq?

Bool -> Bool -> Bool

Returns true if both boolean values are the same.

println (Bool.eq? true true)      # => true
println (Bool.eq? true false)     # => false
println (true == true)           # => true

Bool.ne?

Bool -> Bool -> Bool

Returns true if the boolean values are different.

println (Bool.ne? true false)    # => true
println (Bool.ne? true true)     # => false
println (true != false)         # => true

Conversions

Bool.show

Bool -> String

Converts a boolean to its string representation.

println (Bool.show true)     # => "true"
println (Bool.show false)    # => "false"

Bool.force

Bool -> Bool

Forces evaluation of a boolean value. Useful for strict evaluation in lazy contexts.

b = Bool.force true
println b
# => true

Pattern Matching with Booleans

While you can use if/then/else with booleans, pattern matching is often cleaner for complex logic.

describe = fn(active, admin) =>
    match (active, admin)
        | (true, true) -> "Active admin"
        | (true, false) -> "Active user"
        | (false, _) -> "Inactive"

println (describe true true)
# => "Active admin"

Conditionals

Booleans are commonly used with if/then/else expressions.

status = fn(logged-in) =>
    if logged-in then "Welcome!" else "Please log in"

println (status true)
# => "Welcome!"