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Use only Type instances as keys for State #7585

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merged 3 commits into from
Aug 16, 2023

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JaroslavTulach
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@JaroslavTulach JaroslavTulach commented Aug 15, 2023

Pull Request Description

Fixes #7572 by requiring keys to be Type instances.

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

  • All code follows the
    Scala,
    Java,
    and
    Rust
    style guides. In case you are using a language not listed above, follow the Rust style guide.
  • All code has been tested:
    • Unit tests have been written where possible.

@@ -158,23 +158,23 @@ optimize_fragments : Vector SQL_Fragment -> Vector SQL_Fragment
optimize_fragments fragments =
builder = Vector.new_builder
go elem =
last_part = State.get SQL_Fragment.Code_Part
last_part = State.get SQL_Fragment
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Code_Part is an atom constructor - that's a singleton. We could allow atom constructors as keys, but then there is problem with argumentless constructors like Boolean.True - they are immediately converted to Atom during Enso execution and atoms in general aren't singletons.

Restricting keys to types is simpler.

@@ -12,7 +12,7 @@ from project.Errors.Common import Uninitialized_State

Arguments:
- key: The key to associate your local_state with in the environment.
It is recommended that types be used as keys.
Use types as keys.
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The signature of run : Any -> Any -> Any -> Any remains unchanged, as we don't have any type for type Some_Type.

@JaroslavTulach JaroslavTulach merged commit aa0413e into develop Aug 16, 2023
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@JaroslavTulach JaroslavTulach deleted the wip/jtulach/StateTypes_7572 branch August 16, 2023 13:54
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State accepts only Type as key - explain in docs
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