Class: TypeProf::Core::MethodCallBox

Inherits:
Box
  • Object
show all
Defined in:
lib/typeprof/core/graph/box.rb

Instance Attribute Summary collapse

Attributes inherited from Box

#changes, #destroyed, #node

Instance Method Summary collapse

Methods inherited from Box

#add_symbol_proc_call_box, #destroy, #destroy_symbol_proc_call_boxes, #on_type_added, #on_type_removed, #reuse, #run, #to_s

Constructor Details

#initialize(node, genv, recv, mid, a_args, subclasses, suppress_errors: false, unresolved_recv: nil) ⇒ MethodCallBox

unresolved_recv, when given, collects the receiver types for which no method entity was found. Without it those types only become "undefined method" diagnostics; with it the caller can handle them itself, as [*x] does to wrap a receiver that has no to_a.



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# File 'lib/typeprof/core/graph/box.rb', line 938

def initialize(node, genv, recv, mid, a_args, subclasses, suppress_errors: false, unresolved_recv: nil)
  raise mid.to_s unless mid
  super(node)
  @recv = recv.new_vertex(genv, node)
  @recv.add_edge(genv, self)
  @mid = mid
  @a_args = a_args.new_vertexes(genv, node)
  @a_args.add_box_edges(genv, self)
  @ret = Vertex.new(node)
  @subclasses = subclasses
  @suppress_errors = suppress_errors
  @unresolved_recv = unresolved_recv
  @generics = {}
end

Instance Attribute Details

#mid ⇒ Object (readonly)

Returns the value of attribute mid.



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# File 'lib/typeprof/core/graph/box.rb', line 953

def mid
  @mid
end

#recv ⇒ Object (readonly)

Returns the value of attribute recv.



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# File 'lib/typeprof/core/graph/box.rb', line 953

def recv
  @recv
end

#ret ⇒ Object (readonly)

Returns the value of attribute ret.



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# File 'lib/typeprof/core/graph/box.rb', line 953

def ret
  @ret
end

Instance Method Details

#resolve(genv, changes, &blk) ⇒ Object 



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# File 'lib/typeprof/core/graph/box.rb', line 1025

def resolve(genv, changes, &blk)
  @recv.each_type do |orig_ty|
    next if orig_ty == genv.bot_type
    if @mid == :"*super"
      mid = @node.lenv.cref.mid
      # Outside a method or in a define_method block, the method is unknown
      next unless mid
      skip = true
    else
      mid = @mid
      skip = false
    end

    ty = orig_ty.base_type(genv)

    base_ty_env = Type.default_param_map(genv, ty)

    alias_limit = 0
    while ty
      unless skip
        # First check prepended modules
        if !ty.is_a?(Type::Singleton)
          if resolve_prepended_modules(genv, changes, base_ty_env, ty, mid) do |me, ty, mid|
              yield me, ty, mid, orig_ty
            end
            break
          end
        end

        # Then check the class/module itself
        me = ty.mod.get_method(ty.is_a?(Type::Singleton), mid)
        changes.add_depended_method_entity(me) if changes
        if !me.aliases.empty?
          mid = me.aliases.values.first
          alias_limit += 1
          redo if alias_limit < 5
        end
        if me.exist?
          yield me, ty, mid, orig_ty
          break
        end
      end

      skip = false

      if ty.is_a?(Type::Singleton)
        # Check extended modules (their instance methods are singleton methods here)
        break if resolve_extended_modules(genv, changes, base_ty_env, ty, mid) do |me, ty, mid|
          yield me, ty, mid, orig_ty
        end
      else
        # Finally check included modules
        break if resolve_included_modules(genv, changes, base_ty_env, ty, mid) do |me, ty, mid|
          yield me, ty, mid, orig_ty
        end
      end

      ty = genv.get_superclass_type(ty, changes, base_ty_env)
    end

    yield nil, nil, mid, orig_ty unless ty
  end
end

#resolve_extended_modules(genv, changes, base_ty_env, ty, mid, &blk) ⇒ Object 



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# File 'lib/typeprof/core/graph/box.rb', line 1174

def resolve_extended_modules(genv, changes, base_ty_env, ty, mid, &blk)
  found = false

  alias_limit = 0
  # An extended module's instance methods are resolved as the receiver's
  # singleton methods, so look them up with singleton = false.
  ty.mod.extended_modules.each do |ext_decl, ext_mod|
    if ext_decl.is_a?(AST::SigExtendNode) && ext_mod.type_params
      ext_ty = genv.get_instance_type(ext_mod, ext_decl.args, changes, base_ty_env, ty)
    else
      type_params = ext_mod.type_params.map { genv.untyped_arg } # TODO: better support
      ext_ty = Type::Instance.new(genv, ext_mod, type_params)
    end

    me = ext_ty.mod.get_method(false, mid)
    changes.add_depended_method_entity(me) if changes
    if !me.aliases.empty?
      mid = me.aliases.values.first
      alias_limit += 1
      redo if alias_limit < 5
    end
    if me.exist?
      found = true
      yield me, ext_ty, mid
    else
      # The extended module may itself include other modules.
      found ||= resolve_included_modules(genv, changes, base_ty_env, ext_ty, mid, &blk)
    end
  end
  found
end

#resolve_included_modules(genv, changes, base_ty_env, ty, mid, &blk) ⇒ Object 



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# File 'lib/typeprof/core/graph/box.rb', line 1121

def resolve_included_modules(genv, changes, base_ty_env, ty, mid, &blk)
  found = false

  alias_limit = 0
  ty.mod.self_types.each do |(mdecl, idx), self_ty_mod|
    raise unless mdecl.is_a?(AST::SigModuleNode)
    if self_ty_mod.type_params
      self_ty = genv.get_instance_type(self_ty_mod, mdecl.self_type_args[idx], changes, base_ty_env, ty)
    else
      self_ty = Type::Instance.new(genv, self_ty_mod, [])
    end

    me = self_ty.mod.get_method(false, mid)
    changes.add_depended_method_entity(me) if changes
    if !me.aliases.empty?
      mid = me.aliases.values.first
      alias_limit += 1
      redo if alias_limit < 5
    end
    if me.exist?
      found = true
      yield me, self_ty, mid
    else
      found ||= resolve_included_modules(genv, changes, base_ty_env, self_ty, mid, &blk)
    end
  end

  alias_limit = 0
  ty.mod.included_modules.each do |inc_decl, inc_mod|
    if inc_decl.is_a?(AST::SigIncludeNode) && inc_mod.type_params
      inc_ty = genv.get_instance_type(inc_mod, inc_decl.args, changes, base_ty_env, ty)
    else
      type_params = inc_mod.type_params.map { genv.untyped_arg } # TODO: better support
      inc_ty = Type::Instance.new(genv, inc_mod, type_params)
    end

    me = inc_ty.mod.get_method(false, mid)
    changes.add_depended_method_entity(me) if changes
    if !me.aliases.empty?
      mid = me.aliases.values.first
      alias_limit += 1
      redo if alias_limit < 5
    end
    if me.exist?
      found = true
      yield me, inc_ty, mid
    else
      found ||= resolve_included_modules(genv, changes, base_ty_env, inc_ty, mid, &blk)
    end
  end
  found
end

#resolve_prepended_modules(genv, changes, base_ty_env, ty, mid, &blk) ⇒ Object 



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# File 'lib/typeprof/core/graph/box.rb', line 1089

def resolve_prepended_modules(genv, changes, base_ty_env, ty, mid, &blk)
  found = false

  alias_limit = 0
  # Process prepended modules in reverse order (last prepended = first in ancestor chain)
  ty.mod.prepended_modules.reverse_each do |prep_decl, prep_mod|
    if prep_decl.is_a?(AST::SigPrependNode) && prep_mod.type_params
      prep_ty = genv.get_instance_type(prep_mod, prep_decl.args, changes, base_ty_env, ty)
    else
      type_params = prep_mod.type_params.map { genv.untyped_arg } # TODO: better support
      prep_ty = Type::Instance.new(genv, prep_mod, type_params)
    end

    me = prep_ty.mod.get_method(false, mid)
    changes.add_depended_method_entity(me) if changes
    if !me.aliases.empty?
      mid = me.aliases.values.first
      alias_limit += 1
      redo if alias_limit < 5
    end
    if me.exist?
      found = true
      yield me, prep_ty, mid
    else
      found = resolve_prepended_modules(genv, changes, base_ty_env, prep_ty, mid, &blk)
    end
    break if found
  end

  found
end

#resolve_subclasses(genv, changes) ⇒ Object 



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# File 'lib/typeprof/core/graph/box.rb', line 1206

def resolve_subclasses(genv, changes)
  # TODO: This does not follow new subclasses
  @recv.each_type do |ty|
    next if ty == genv.bot_type
    base_ty = ty.base_type(genv)
    singleton = base_ty.is_a?(Type::Singleton)
    mod = base_ty.mod
    # Every class descends from Object, so this would only find unrelated methods
    next if mod.cpath.empty?
    mod.each_descendant do |desc_mod|
      next if mod == desc_mod
      me = desc_mod.get_method(singleton, @mid)
      changes.add_depended_method_entity(me)
      if me && me.exist?
        yield ty, me
      end
    end
  end
end

#run0(genv, changes) ⇒ Object 



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# File 'lib/typeprof/core/graph/box.rb', line 955

def run0(genv, changes)
  a_args = @a_args.normalize_for_method_call(genv)
  return unless a_args

  edges = Set.empty
  called_mdefs = Set.empty
  error_count = 0
  resolve(genv, changes) do |me, ty, mid, orig_ty|
    if @node.is_a?(AST::YieldNode) && mid == :call && orig_ty.is_a?(Type::Symbol)
      box = add_symbol_proc_call_box(changes, genv, orig_ty.sym, a_args.positionals, a_args.keywords)
      changes.add_edge(genv, box.ret, @ret) if box
    elsif !me
      if @unresolved_recv
        changes.add_edge(genv, Source.new(orig_ty), @unresolved_recv)
      end
      unless @suppress_errors
        if error_count < 3
          meth = @node.mid_code_range ? :mid_code_range : :code_range
          changes.add_diagnostic(meth, "undefined method: #{ orig_ty.show }##{ mid }")
        end
      end
      error_count += 1
    elsif me.builtin && me.builtin[changes, @node, orig_ty, a_args, @ret]
      # do nothing
    elsif !me.decls.empty?
      # TODO: support "| ..."
      me.decls.each do |mdecl|
        # TODO: union type is ok?
        # TODO: add_depended_method_entity for types used to resolve overloads
        ty_env = Type.default_param_map(genv, orig_ty)
        if ty.is_a?(Type::Instance)
          ty.mod.type_params.zip(ty.args) do |(param, default_ty), arg|
            ty_env[param] = arg || (default_ty ? default_ty.covariant_vertex(genv, changes, ty_env) : genv.untyped_arg)
          end
        end
        mdecl.resolve_overloads(changes, genv, @node, ty_env, a_args, @ret) do |method_type|
          @generics[method_type] ||= method_type.type_params.map { Vertex.new(@node) }
        end
      end
    elsif !me.defs.empty?
      me.defs.each do |mdef|
        next if called_mdefs.include?(mdef)
        called_mdefs << mdef
        mdef.call(changes, genv, a_args, @ret)
      end
    else
      pp me
      raise
    end
  end
  if @subclasses
    resolve_subclasses(genv, changes) do |recv_ty, me|
      if !me.defs.empty?
        me.defs.each do |mdef|
          next if called_mdefs.include?(mdef)
          called_mdefs << mdef
          mdef.call(changes, genv, a_args, @ret)
        end
      end
    end
  end
  edges.each do |src, dst|
    changes.add_edge(genv, src, dst)
  end
  if error_count > 3 && !@suppress_errors
    meth = @node.mid_code_range ? :mid_code_range : :code_range
    changes.add_diagnostic(meth, "... and other #{ error_count - 3 } errors")
  end
end