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Idiom # 69: Seed random generator

See programming-idioms.org:

Random numbers generators in Fuzion are effects. To use a random number generator with a particular seed, we have to create an instance of simple_random_provider with the given seed and run code with this this effect in its environment. The standard library feature simple_random creates such a random provider with the given seed and installs it as the environment for running the code provided with the function parameter f.


Running Example

The following example provides a feature seed that executes a function f with in an environment with a seeded random number generator. For illustration, show_random is called in this context and also in the default random provider and an explicitly time seeded random provider: