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Describe rule for type conversion functions in Julia

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Alex Beregszaszi 2018-05-09 16:58:31 +02:00
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docs/julia.rst
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@ -306,12 +306,15 @@ Type Conversion Functions
JULIA has no support for implicit type conversion and therefore functions exists to provide explicit conversion. JULIA has no support for implicit type conversion and therefore functions exists to provide explicit conversion.
When converting a larger type to a shorter type a runtime exception can occur in case of an overflow. When converting a larger type to a shorter type a runtime exception can occur in case of an overflow.
The following type conversion functions must be available: Truncating conversions are supported between the following types:
- ``u32tobool(x:u32) -> y:bool`` - ``bool``
- ``booltou32(x:bool) -> y:u32`` - ``u32``
- ``u32tou64(x:u32) -> y:u64`` - ``u64``
- ``u64tou32(x:u64) -> y:u32`` - ``u256``
- etc. (TBD) - ``s256``
For each of these a type conversion function exists having the prototype in the form of ``<input_type>to<output_type>(x:<input_type>) -> y:<output_type>``,
such as ``u32tobool(x:u32) -> y:bool``, ``u256tou32(x:u256) -> y:u32`` or ``s256tou256(x:s256) -> y:u256``.
.. note:: .. note::