Class: RBS::Resolver::TypeNameResolver

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

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(all_names, aliases) ⇒ TypeNameResolver

Returns a new instance of TypeNameResolver.



10
11
12
13
14
 
# File 'lib/rbs/resolver/type_name_resolver.rb', line 10

def initialize(all_names, aliases)
  @all_names = all_names
  @aliases = aliases
  @cache = {}
end

Instance Attribute Details

#aliases ⇒ Object (readonly)

Returns the value of attribute aliases.



8
9
10
 
# File 'lib/rbs/resolver/type_name_resolver.rb', line 8

def aliases
  @aliases
end

#all_names ⇒ Object (readonly)

Returns the value of attribute all_names.



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

def all_names
  @all_names
end

#cache ⇒ Object (readonly)

Returns the value of attribute cache.



7
8
9
 
# File 'lib/rbs/resolver/type_name_resolver.rb', line 7

def cache
  @cache
end

Class Method Details

.build(env) ⇒ Object 



16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
 
# File 'lib/rbs/resolver/type_name_resolver.rb', line 16

def self.build(env)
  all_names = Set.new #: Set[TypeName]

  all_names.merge(env.class_decls.keys)
  all_names.merge(env.interface_decls.keys)
  all_names.merge(env.type_alias_decls.keys)

  aliases = {} #: Hash[TypeName, [TypeName, context]]

  env.class_alias_decls.each do |name, entry|
    aliases[name] = [entry.decl.old_name, entry.context]
  end

  new(all_names, aliases)
end

Instance Method Details

#aliased_name?(type_name) ⇒ Boolean

Returns:

  • (Boolean) 


80
81
82
83
84
 
# File 'lib/rbs/resolver/type_name_resolver.rb', line 80

def aliased_name?(type_name)
  if aliases.key?(type_name)
    type_name
  end
end

#has_type_name?(full_name) ⇒ Boolean

Returns:

  • (Boolean) 


74
75
76
77
78
 
# File 'lib/rbs/resolver/type_name_resolver.rb', line 74

def has_type_name?(full_name)
  if all_names.include?(full_name)
    full_name
  end
end

#normalize_namespace(type_name, rhs, context, visited) ⇒ Object 



119
120
121
122
123
124
125
126
127
128
129
130
131
132
 
# File 'lib/rbs/resolver/type_name_resolver.rb', line 119

def normalize_namespace(type_name, rhs, context, visited)
  if visited.include?(type_name)
    # Cycle detected
    return false
  end

  visited << type_name

  begin
    resolve_namespace0(rhs, context, visited)
  ensure
    visited.delete(type_name)
  end
end

#resolve(type_name, context:) ⇒ Object 



37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
 
# File 'lib/rbs/resolver/type_name_resolver.rb', line 37

def resolve(type_name, context:)
  if type_name.absolute? && has_type_name?(type_name)
    return type_name
  end

  try_cache(type_name, context) do
    if type_name.class?
      resolve_namespace0(type_name, context, Set.new) || nil
    else
      namespace = type_name.namespace

      if namespace.empty?
        resolve_type_name(type_name.name, context)
      else
        if namespace = resolve_namespace0(namespace.to_type_name, context, Set.new)
          type_name = TypeName[namespace.to_namespace, type_name.name]
          has_type_name?(type_name)
        end
      end
    end
  end
end

#resolve_head_namespace(head, context) ⇒ Object 



102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
 
# File 'lib/rbs/resolver/type_name_resolver.rb', line 102

def resolve_head_namespace(head, context)
  if context
    outer, inner = context
    case inner
    when false
      resolve_head_namespace(head, outer)
    when TypeName
      has_type_name?(inner) or raise "Context must be normalized: #{inner.inspect}"
      type_name = TypeName[inner.to_namespace, head]
      has_type_name?(type_name) || aliased_name?(type_name) || resolve_head_namespace(head, outer)
    end
  else
    type_name = TypeName[Namespace.root, head]
    has_type_name?(type_name) || aliased_name?(type_name)
  end
end

#resolve_namespace(type_name, context:) ⇒ Object 



60
61
62
63
64
65
66
67
68
69
70
71
72
 
# File 'lib/rbs/resolver/type_name_resolver.rb', line 60

def resolve_namespace(type_name, context:)
  if type_name.absolute? && has_type_name?(type_name)
    return type_name
  end

  unless type_name.class?
    raise "Type name must be a class name: #{type_name}"
  end

  try_cache(type_name, context) do
    ns = resolve_namespace0(type_name, context, Set.new) or return ns
  end
end

#resolve_namespace0(type_name, context, visited) ⇒ Object 



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
161
162
163
164
 
# File 'lib/rbs/resolver/type_name_resolver.rb', line 134

def resolve_namespace0(type_name, context, visited)
  head, *tail = [*type_name.namespace.path, type_name.name]

  head = head #: Symbol

  head =
    if type_name.absolute?
      root_name = TypeName[Namespace.root, head]
      has_type_name?(root_name) || aliased_name?(root_name)
    else
      resolve_head_namespace(head, context)
    end

  if head
    if (rhs, context = aliases.fetch(head, nil))
      head = normalize_namespace(head, rhs, context, visited) or return head
    end

    tail.inject(head) do |namespace, name|
      type_name = TypeName[namespace.to_namespace, name]
      case
      when has_type_name?(type_name)
        type_name
      when (rhs, context = aliases.fetch(type_name, nil))
        m = normalize_namespace(type_name, rhs, context, visited) or return m
      else
        return nil
      end
    end
  end
end

#resolve_type_name(type_name, context) ⇒ Object 



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

def resolve_type_name(type_name, context)
  if context
    outer, inner = context
    case inner
    when false
      resolve_type_name(type_name, outer)
    else
      has_type_name?(inner) or raise "Context must be normalized: #{inner.inspect}"
      has_type_name?(TypeName[inner.to_namespace, type_name]) || resolve_type_name(type_name, outer)
    end
  else
    type_name = TypeName[Namespace.root, type_name]
    has_type_name?(type_name)
  end
end

#try_cache(type_name, context) ⇒ Object 



32
33
34
35
 
# File 'lib/rbs/resolver/type_name_resolver.rb', line 32

def try_cache(type_name, context)
  inner = cache[context] ||= {}
  inner.fetch(type_name) { inner[type_name] = yield }
end