outrun/outrun-core/lib/boolean.outrun

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use Outrun.Core.Boolean
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use LogicalNot
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```doc
# Boolean
Provides a common interface for values masquerading as Booleans.
```
protocol Boolean, as: do
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```doc
A mechanism for values to convert themselves into a concrete boolean value.
Must be implemented.
```
def true?(self: Self): Outrun.Core.Boolean
```doc
Is the value false?
```
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def false?(self: Self): Outrun.Core.Boolean, as: LogicalNot.not(Boolean.true?(self))
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end