Class: TypeProf::Core::BasicVertex

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

Direct Known Subclasses

Source, Vertex

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(types) ⇒ BasicVertex

Returns a new instance of BasicVertex.



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# File 'lib/typeprof/core/graph/vertex.rb', line 3

def initialize(types)
  @types = types
  @types_to_be_added = {}
end

Instance Attribute Details

#types ⇒ Object (readonly)

Returns the value of attribute types.



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# File 'lib/typeprof/core/graph/vertex.rb', line 8

def types
  @types
end

Instance Method Details

#check_match(genv, changes, vtx) ⇒ Object 



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# File 'lib/typeprof/core/graph/vertex.rb', line 23

def check_match(genv, changes, vtx)
  vtx.each_type do |ty|
    if ty.is_a?(Type::Var)
      changes.add_edge(genv, self, ty.vtx) if self != ty.vtx
      return true
    end
  end

  return true if @types.empty?
  return true if vtx.types.empty?

  each_type do |ty|
    return true if vtx.types.include?(ty) # fast path
    if ty.check_match(genv, changes, vtx)
      return true
    end
  end

  return false
end

#each_type(&blk) ⇒ Object 



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# File 'lib/typeprof/core/graph/vertex.rb', line 10

def each_type(&blk)
  @types.each_key(&blk)

  until @types_to_be_added.empty?
    h = @types_to_be_added.dup
    h.each do |ty, source|
      @types[ty] = source
    end
    @types_to_be_added.clear
    h.each_key(&blk)
  end
end

#show ⇒ Object 



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# File 'lib/typeprof/core/graph/vertex.rb', line 44

def show
  Fiber[:show_rec] ||= Set[]
  if Fiber[:show_rec].include?(self)
    "untyped"
  else
    begin
      Fiber[:show_rec] << self
      types = []
      bot = @types.keys.any? {|ty| ty.is_a?(Type::Bot) }
      optional = true_exist = false_exist = false
      each_type do |ty|
        if ty.is_a?(Type::Instance)
          case ty.mod.cpath
          when [:NilClass] then optional = true
          when [:TrueClass] then true_exist = true
          when [:FalseClass] then false_exist = true
          end
        end
      end
      bool = true_exist && false_exist
      types << "bool" if bool
      each_type do |ty, _source|
        if ty.is_a?(Type::Instance)
          next if ty.mod.cpath == [:NilClass]
          next if bool && (ty.mod.cpath == [:TrueClass] || ty.mod.cpath == [:FalseClass])
        end
        next if ty.is_a?(Type::Bot)
        types << ty.show
      end
      types = types.uniq.sort
      case types.size
      when 0
        optional ? "nil" : bot ? "bot" : "untyped"
      when 1
        types.first + (optional ? "?" : "")
      else
        "(#{ types.join(" | ") })" + (optional ? "?" : "")
      end
    ensure
      Fiber[:show_rec].delete(self) || raise
    end
  end
end