Class: RBS::ConstantTable

Inherits:
Object
  • Object
show all
Defined in:
lib/rbs/constant_table.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(builder:) ⇒ ConstantTable

Returns a new instance of ConstantTable.



14
15
16
17
 
# File 'lib/rbs/constant_table.rb', line 14

def initialize(builder:)
  @definition_builder = builder
  @constant_scopes_cache = {}
end

Instance Attribute Details

#constant_scopes_cache ⇒ Object (readonly)

Returns the value of attribute constant_scopes_cache.



4
5
6
 
# File 'lib/rbs/constant_table.rb', line 4

def constant_scopes_cache
  @constant_scopes_cache
end

#definition_builder ⇒ Object (readonly)

Returns the value of attribute definition_builder.



3
4
5
 
# File 'lib/rbs/constant_table.rb', line 3

def definition_builder
  @definition_builder
end

Instance Method Details

#absolute_type(type, context:) ⇒ Object 



19
20
21
22
23
 
# File 'lib/rbs/constant_table.rb', line 19

def absolute_type(type, context:)
  type.map_type_name do |type_name, location|
    absolute_type_name(type_name, context: context, location: location)
  end
end

#absolute_type_name(type_name, context:, location:) ⇒ Object 



25
26
27
28
 
# File 'lib/rbs/constant_table.rb', line 25

def absolute_type_name(type_name, context:, location:)
  resolver.resolve(type_name, context: context) or
    raise NoTypeFoundError.new(type_name: type_name, location: location)
end

#constant_scopes(name) ⇒ Object 



103
104
105
 
# File 'lib/rbs/constant_table.rb', line 103

def constant_scopes(name)
  constant_scopes_cache[name] ||= constant_scopes0(name, scopes: [])
end

#constant_scopes0(name, scopes: []) ⇒ Object 



126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
 
# File 'lib/rbs/constant_table.rb', line 126

def constant_scopes0(name, scopes: [])
  entry = env.class_decls[name]
  namespace = name.to_namespace

  case entry
  when Environment::ClassEntry
    unless name == BuiltinNames::BasicObject.name
      super_name = entry.primary.decl.super_class&.yield_self do |super_class|
        absolute_type_name(super_class.name, context: entry.primary.context, location: entry.primary.decl.location)
      end || BuiltinNames::Object.name

      constant_scopes0 super_name, scopes: scopes
    end

    entry.decls.each do |d|
      d.decl.members.each do |member|
        case member
        when AST::Members::Include
          if member.name.class?
            constant_scopes_module absolute_type_name(member.name, context: d.context, location: member.location),
                                   scopes: scopes
          end
        end
      end
    end

    scopes.unshift namespace

  when Environment::ModuleEntry
    constant_scopes0 BuiltinNames::Module.name, scopes: scopes
    constant_scopes_module name, scopes: scopes
  end

  scopes
end

#constant_scopes_module(name, scopes:) ⇒ Object 



107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
 
# File 'lib/rbs/constant_table.rb', line 107

def constant_scopes_module(name, scopes:)
  entry = env.class_decls[name]
  namespace = name.to_namespace

  entry.decls.each do |d|
    d.decl.members.each do |member|
      case member
      when AST::Members::Include
        if member.name.class?
          constant_scopes_module absolute_type_name(member.name, context: d.context, location: member.location),
                                 scopes: scopes
        end
      end
    end
  end

  scopes.unshift namespace
end

#env ⇒ Object 



6
7
8
 
# File 'lib/rbs/constant_table.rb', line 6

def env
  definition_builder.env
end

#name_to_constant(name) ⇒ Object 



30
31
32
33
34
35
36
37
38
39
 
# File 'lib/rbs/constant_table.rb', line 30

def name_to_constant(name)
  case
  when entry = env.constant_decls[name]
    type = absolute_type(entry.decl.type, context: entry.context)
    Constant.new(name: name, type: type, entry: entry)
  when entry = env.class_decls[name]
    type = Types::ClassSingleton.new(name: name, location: nil)
    Constant.new(name: name, type: type, entry: entry)
  end
end

#resolve_constant_reference(name, context:) ⇒ Object 



45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
 
# File 'lib/rbs/constant_table.rb', line 45

def resolve_constant_reference(name, context:)
  raise "Context cannot be empty: Specify `[Namespace.root]`" if context.empty?

  head, *tail = split_name(name)

  raise unless head

  head_constant = case
                  when name.absolute?
                    name_to_constant(TypeName.new(name: head, namespace: Namespace.root))
                  when context == [Namespace.root]
                    name_to_constant(TypeName.new(name: head, namespace: Namespace.root))
                  else
                    resolve_constant_reference_context(head, context: context) ||
                      resolve_constant_reference_inherit(head, scopes: constant_scopes(context.first.to_type_name))
                  end

  tail.inject(head_constant) do |constant, name|
    if constant
      resolve_constant_reference_inherit(
        name,
        scopes: constant_scopes(constant.name),
        no_object: constant.name != BuiltinNames::Object.name
      )
    end
  end
end

#resolve_constant_reference_context(name, context:) ⇒ Object 



73
74
75
76
77
78
79
80
81
82
83
84
 
# File 'lib/rbs/constant_table.rb', line 73

def resolve_constant_reference_context(name, context:)
  head, *tail = context

  if head
    if head.path.last == name
      name_to_constant(head.to_type_name)
    else
      name_to_constant(TypeName.new(name: name, namespace: head)) ||
        resolve_constant_reference_context(name, context: tail)
    end
  end
end

#resolve_constant_reference_inherit(name, scopes:, no_object: false) ⇒ Object 



86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
 
# File 'lib/rbs/constant_table.rb', line 86

def resolve_constant_reference_inherit(name, scopes:, no_object: false)
  scopes.each do |context|
    if context.path == [:Object]
      unless no_object
        constant = name_to_constant(TypeName.new(name: name, namespace: context)) ||
          name_to_constant(TypeName.new(name: name, namespace: Namespace.root))
      end
    else
      constant = name_to_constant(TypeName.new(name: name, namespace: context))
    end

    return constant if constant
  end

  nil
end

#resolver ⇒ Object 



10
11
12
 
# File 'lib/rbs/constant_table.rb', line 10

def resolver
  @resolver ||= TypeNameResolver.from_env(env)
end

#split_name(name) ⇒ Object 



41
42
43
 
# File 'lib/rbs/constant_table.rb', line 41

def split_name(name)
  name.namespace.path + [name.name]
end