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# frozen_string_literal: true
require 'dry/core/deprecations'
module Dry
module Types
# @api private
class Compiler
extend ::Dry::Core::Deprecations[:'dry-types']
attr_reader :registry
def initialize(registry)
@registry = registry
end
def call(ast)
visit(ast)
end
def visit(node)
type, body = node
send(:"visit_#{type}", body)
end
def visit_constrained(node)
nominal, rule = node
type = visit(nominal)
type.constrained_type.new(type, rule: visit_rule(rule))
end
def visit_constructor(node)
nominal, fn = node
primitive = visit(nominal)
primitive.constructor(compile_fn(fn))
end
def visit_lax(node)
Types::Lax.new(visit(node))
end
deprecate(:visit_safe, :visit_lax)
def visit_nominal(node)
type, meta = node
nominal_name = "nominal.#{Types.identifier(type)}"
if registry.registered?(nominal_name)
registry[nominal_name].meta(meta)
else
Nominal.new(type, meta: meta)
end
end
def visit_rule(node)
Dry::Types.rule_compiler.([node])[0]
end
def visit_sum(node)
*types, meta = node
types.map { |type| visit(type) }.reduce(:|).meta(meta)
end
def visit_array(node)
member, meta = node
member = member.is_a?(Class) ? member : visit(member)
registry['nominal.array'].of(member).meta(meta)
end
def visit_hash(node)
opts, meta = node
registry['nominal.hash'].with(**opts, meta: meta)
end
def visit_schema(node)
keys, options, meta = node
registry['nominal.hash'].schema(keys.map { |key| visit(key) }).with(**options, meta: meta)
end
def visit_json_hash(node)
keys, meta = node
registry['json.hash'].schema(keys.map { |key| visit(key) }, meta)
end
def visit_json_array(node)
member, meta = node
registry['json.array'].of(visit(member)).meta(meta)
end
def visit_params_hash(node)
keys, meta = node
registry['params.hash'].schema(keys.map { |key| visit(key) }, meta)
end
def visit_params_array(node)
member, meta = node
registry['params.array'].of(visit(member)).meta(meta)
end
def visit_key(node)
name, required, type = node
Schema::Key.new(visit(type), name, required: required)
end
def visit_enum(node)
type, mapping = node
Enum.new(visit(type), mapping: mapping)
end
def visit_map(node)
key_type, value_type, meta = node
registry['nominal.hash'].map(visit(key_type), visit(value_type)).meta(meta)
end
def visit_any(meta)
registry['any'].meta(meta)
end
def compile_fn(fn)
type, *node = fn
case type
when :id
Dry::Types::FnContainer[node.fetch(0)]
when :callable
node.fetch(0)
when :method
target, method = node
target.method(method)
else
raise ArgumentError, "Cannot build callable from #{fn.inspect}"
end
end
end
end
end
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