predicator v0.5.1 Predicator.Evaluator
Evaluator Module
Link to this section Summary
Functions
Execute will evaluate a predicator instruction set
Link to this section Types
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error_t()
error_t() :: {:error, Predicator.InstructionError.t() | Predicator.ValueError.t() | Predicator.InstructionNotCompleteError.t()}
Link to this section Functions
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execute(inst, context_struct \\ %{}, opts \\ [map_type: :atom, nil_values: ["", nil]])
Execute will evaluate a predicator instruction set.
If your context struct is using string_keyed map then you will need to pass in the
[map_type: :string]
options to the execute function to evaluate.
Examples:
iex> Predicator.Evaluator.execute([["lit", true]])
true
iex> Predicator.Evaluator.execute([["lit", 2], ["lit", 3], ["compare", "LT"]])
true
iex> Predicator.Evaluator.execute([["load", "age"], ["lit", 18], ["compare", "GT"]], %{age: 19})
true
iex> Predicator.Evaluator.execute([["load", "name"], ["lit", "jrichocean"], ["compare", "EQ"]], %{age: 19})
{:error, %Predicator.ValueError{error: "Non valid load value to evaluate", instruction_pointer: 0, instructions: [["load", "name"], ["lit", "jrichocean"], ["compare", "EQ"]], stack: [], opts: [map_type: :atom, nil_values: ["", nil]]}}
iex> Predicator.Evaluator.execute([["load", "age"], ["lit", 18], ["compare", "GT"]], %{"age" => 19}, [map_type: :string])
true
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instruction_not_complete_err(machine)