Contents

module Steep
  module AST
    module Types
      class Proc
        attr_reader :location
        attr_reader :params
        attr_reader :return_type

        def initialize(params:, return_type:, location: nil)
          @location = location
          @params = params
          @return_type = return_type
        end

        def ==(other)
          other.is_a?(self.class) &&
            other.params == params &&
            other.return_type == return_type
        end

        def hash
          self.class.hash && params.hash && return_type.hash
        end

        alias eql? ==

        def subst(s)
          self.class.new(
            params: params.subst(s),
            return_type: return_type.subst(s),
            location: location
          )
        end

        def to_s
          "^#{params} -> #{return_type}"
        end

        def free_variables
          params.free_variables + return_type.free_variables
        end

        def level
          children = params.each_type.to_a + [return_type]
          [0] + level_of_children(children)
        end

        def closed?
          params.closed? && return_type.closed?
        end

        def with_location(new_location)
          self.class.new(location: new_location, params: params, return_type: return_type)
        end

        def map_type(&block)
          self.class.new(
            params: params.map_type(&block),
            return_type: yield(return_type),
            location: location
          )
        end

        def one_arg?
          params.required.size == 1 &&
            params.optional.empty? &&
            !params.rest &&
            params.required_keywords.empty? &&
            params.optional_keywords.empty? &&
            !params.rest_keywords
        end

        def back_type
          Name::Instance.new(name: Builtin::Proc.module_name,
                             args: [],
                             location: location)
        end
      end
    end
  end
end

Version data entries

21 entries across 21 versions & 1 rubygems

Version	Path
steep-0.10.0	lib/steep/ast/types/proc.rb