748f87636a
checkpoint failing test after fixing tests checkpoint checkpoint checkpoint re-work asd checkpoint checkpoint checkpoint mix proj checkpoint mix first parser impl checkpoint fix tests re-org parser checkpoint strings fix multiline strings tuples checkpoint maps checkpoint checkpoint checkpoint checkpoint fix weird eof expression parse error checkpoint before typing checkpoint checpoint checkpoint checkpoint checkpoint ids in primitive types checkpoint checkpoint fix tests initial annotation checkpoint checkpoint checkpoint union subtyping conventions refactor - split typer typing tuples checkpoint test refactor checkpoint test refactor parsing atoms checkpoint atoms wip lists checkpoint typing lists checkopint checkpoint wip fixing correct list typing map discussion checkpoint map basic typing fix tests checkpoint checkpoint checkpoint checkpoint fix condition typing fix literal keys in map types checkpoint union types checkpoint union type checkpoint row types discussion & bidirectional typecheck checkpoint basic lambdas checkpoint lambdas typing application wip function application checkpoint checkpoint checkpoint cduce checkpoint checkpoint checkpoint checkpoint checkpoint checkpoint checkpoint
58 lines
1.9 KiB
Elixir
58 lines
1.9 KiB
Elixir
defmodule Tilly.Type do
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@moduledoc """
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Defines the structure of a Type Descriptor (`Descr`) and provides
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helper functions for creating fundamental type descriptors.
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A Type Descriptor is a map representing a type. Each field in the map
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corresponds to a basic kind of type component (e.g., atoms, integers, pairs)
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and holds a BDD node ID. These BDDs represent the set of values
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allowed for that particular component of the type.
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"""
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alias Tilly.BDD
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@doc """
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Returns a `Descr` map representing the empty type (Nothing).
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All BDD IDs in this `Descr` point to the canonical `false` BDD node.
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The `typing_ctx` is passed for consistency but not modified by this function.
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"""
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def empty_descr(_typing_ctx) do
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false_id = BDD.false_node_id()
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%{
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atoms_bdd_id: false_id,
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integers_bdd_id: false_id,
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strings_bdd_id: false_id,
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pairs_bdd_id: false_id,
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records_bdd_id: false_id,
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functions_bdd_id: false_id,
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absent_marker_bdd_id: false_id
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# Add other kinds as needed, e.g., for abstract types
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}
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end
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@doc """
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Returns a `Descr` map representing the universal type (Any).
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All BDD IDs in this `Descr` point to the canonical `true` BDD node.
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The `typing_ctx` is passed for consistency but not modified by this function.
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"""
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def any_descr(_typing_ctx) do
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true_id = BDD.true_node_id()
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%{
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atoms_bdd_id: true_id,
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integers_bdd_id: true_id,
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strings_bdd_id: true_id,
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pairs_bdd_id: true_id,
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records_bdd_id: true_id,
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functions_bdd_id: true_id,
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# For 'Any', absence is typically not included unless explicitly modeled.
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# If 'Any' should include the possibility of absence, this would be true_id.
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# For now, let's assume 'Any' means any *value*, so absence is false.
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# This can be refined based on the desired semantics of 'Any'.
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# CDuce 'Any' does not include 'Absent'.
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absent_marker_bdd_id: BDD.false_node_id()
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}
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end
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end
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