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Versions: 7
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Contents
# frozen_string_literal: true
require 'dry/core/cache'
module Dry
module Types
# PrimitiveInferrer returns the list of classes matching a type.
#
# @api public
class PrimitiveInferrer
extend Core::Cache
# Compiler reduces type AST into a list of primitives
#
# @api private
class Compiler
# @api private
def visit(node)
meth, rest = node
public_send(:"visit_#{meth}", rest)
end
# @api private
def visit_nominal(node)
type, _ = node
type
end
# @api private
def visit_hash(_)
::Hash
end
alias_method :visit_schema, :visit_hash
# @api private
def visit_array(_)
::Array
end
# @api private
def visit_lax(node)
visit(node)
end
# @api private
def visit_constructor(node)
other, * = node
visit(other)
end
# @api private
def visit_enum(node)
other, * = node
visit(other)
end
# @api private
def visit_sum(node)
left, right = node
[visit(left), visit(right)].flatten(1)
end
# @api private
def visit_constrained(node)
other, * = node
visit(other)
end
# @api private
def visit_any(_)
::Object
end
end
# @return [Compiler]
# @api private
attr_reader :compiler
# @api private
def initialize
@compiler = Compiler.new
end
# Infer primitives from the provided type
#
# @return [Array[Class]]
#
# @api private
def [](type)
self.class.fetch_or_store(type) do
Array(compiler.visit(type.to_ast)).freeze
end
end
end
end
end
Version data entries
7 entries across 7 versions & 2 rubygems