Class: RbsMacros::Macros::ForwardableMacros

Inherits:
RbsMacros::Macro show all
Defined in:
lib/rbs_macros/macros/forwardable.rb

Overview

Implements macros for the ‘Forwardable` module.

Instance Method Summary collapse

Instance Method Details

#meta_def_delegator(params) ⇒ Object 



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# File 'lib/rbs_macros/macros/forwardable.rb', line 20

def meta_def_delegator(params)
  recv = params.receiver
  return unless recv.is_a?(MetaModule)

  accessor = params.positional[0]
  method = params.positional[1]
  ali = params.positional[2] || method
  return unless accessor.is_a?(Symbol) || accessor.is_a?(String)
  return unless method.is_a?(Symbol) || method.is_a?(String)
  return unless ali.is_a?(Symbol) || ali.is_a?(String)

  builder = RBS::DefinitionBuilder.new(env: params.env.rbs)
  self_instance = builder.build_instance(recv.rbs_type)
  accessor_type =
    case accessor.to_s
    when /\A@/
      ivar = self_instance.instance_variables[accessor.to_sym]
      return unless ivar

      ivar.type
    else
      # TODO
      return
    end
  accessor_instance = widened_instance(accessor_type, builder:)
  return unless accessor_instance

  meth = accessor_instance[0].methods[method.to_sym]&.sub(accessor_instance[1])
  return unless meth

  params.env.add_decl(
    RBS::AST::Members::MethodDefinition.new(
      name: ali.to_sym,
      kind: :instance,
      overloads:
        meth.defs.map do |typedef|
          RBS::AST::Members::MethodDefinition::Overload.new(
            method_type: typedef.type,
            annotations: []
          )
        end,
      annotations: [],
      location: nil,
      comment: nil,
      overloading: false,
      visibility: nil
    ),
    mod: recv,
    file: params.filename
  )
end

#meta_def_delegators(params) ⇒ Object 



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# File 'lib/rbs_macros/macros/forwardable.rb', line 72

def meta_def_delegators(params)
  recv = params.receiver
  return unless recv.is_a?(MetaModule)

  accessor = params.positional[0]
  methods = params.positional[1..] || []
  methods.each do |method|
    params.env.invoke(
      params.with(
        name: :def_instance_delegator,
        positional: [accessor, method],
        keyword: {},
        block: nil
      )
    )
  end
end

#setup(env) ⇒ Object 



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# File 'lib/rbs_macros/macros/forwardable.rb', line 12

def setup(env)
  env.register_handler(:def_delegator, method(:meta_def_delegator))
  env.register_handler(:def_instance_delegator, method(:meta_def_delegator))

  env.register_handler(:def_delegators, method(:meta_def_delegators))
  env.register_handler(:def_instance_delegators, method(:meta_def_delegators))
end