Class: Rigor::Scope

Inherits:
Object
  • Object
show all
Defined in:
lib/rigor/scope.rb

Overview

Immutable analyzer scope: holds local-variable bindings and a reference to the surrounding Environment. State changes return new scopes through explicit transition methods (#with_local). The central query is #type_of(node), the Rigor counterpart of PHPStan’s $scope->getType($node).

See docs/internal-spec/inference-engine.md for the binding contract. rubocop:disable Metrics/ClassLength,Metrics/ParameterLists

Defined Under Namespace

Classes: ChainKey, IndexedKey

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(environment:, locals:, fact_store: Analysis::FactStore.empty, self_type: nil, declared_types: EMPTY_DECLARED_TYPES, ivars: EMPTY_VAR_BINDINGS, cvars: EMPTY_VAR_BINDINGS, globals: EMPTY_VAR_BINDINGS, class_ivars: EMPTY_CLASS_BINDINGS, class_cvars: EMPTY_CLASS_BINDINGS, program_globals: EMPTY_VAR_BINDINGS, discovered_classes: EMPTY_VAR_BINDINGS, in_source_constants: EMPTY_VAR_BINDINGS, discovered_methods: EMPTY_CLASS_BINDINGS, discovered_def_nodes: EMPTY_CLASS_BINDINGS, discovered_method_visibilities: EMPTY_CLASS_BINDINGS, discovered_superclasses: EMPTY_CLASS_BINDINGS, discovered_includes: EMPTY_CLASS_BINDINGS, indexed_narrowings: EMPTY_INDEXED_NARROWINGS, method_chain_narrowings: EMPTY_CHAIN_NARROWINGS, source_path: nil) ⇒ Scope

Returns a new instance of Scope.



77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
 
# File 'lib/rigor/scope.rb', line 77

def initialize(
  environment:, locals:,
  fact_store: Analysis::FactStore.empty,
  self_type: nil,
  declared_types: EMPTY_DECLARED_TYPES,
  ivars: EMPTY_VAR_BINDINGS,
  cvars: EMPTY_VAR_BINDINGS,
  globals: EMPTY_VAR_BINDINGS,
  class_ivars: EMPTY_CLASS_BINDINGS,
  class_cvars: EMPTY_CLASS_BINDINGS,
  program_globals: EMPTY_VAR_BINDINGS,
  discovered_classes: EMPTY_VAR_BINDINGS,
  in_source_constants: EMPTY_VAR_BINDINGS,
  discovered_methods: EMPTY_CLASS_BINDINGS,
  discovered_def_nodes: EMPTY_CLASS_BINDINGS,
  discovered_method_visibilities: EMPTY_CLASS_BINDINGS,
  discovered_superclasses: EMPTY_CLASS_BINDINGS,
  discovered_includes: EMPTY_CLASS_BINDINGS,
  indexed_narrowings: EMPTY_INDEXED_NARROWINGS,
  method_chain_narrowings: EMPTY_CHAIN_NARROWINGS,
  source_path: nil
)
  @environment = environment
  @locals = locals
  @fact_store = fact_store
  @self_type = self_type
  @declared_types = declared_types
  @ivars = ivars
  @cvars = cvars
  @globals = globals
  @class_ivars = class_ivars
  @class_cvars = class_cvars
  @program_globals = program_globals
  @discovered_classes = discovered_classes
  @in_source_constants = in_source_constants
  @discovered_methods = discovered_methods
  @discovered_def_nodes = discovered_def_nodes
  @discovered_method_visibilities = discovered_method_visibilities
  @discovered_superclasses = discovered_superclasses
  @discovered_includes = discovered_includes
  @indexed_narrowings = indexed_narrowings
  @method_chain_narrowings = method_chain_narrowings
  @source_path = source_path
  freeze
end

Instance Attribute Details

#class_cvars ⇒ Object (readonly)

Returns the value of attribute class_cvars.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def class_cvars
  @class_cvars
end

#class_ivars ⇒ Object (readonly)

Returns the value of attribute class_ivars.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def class_ivars
  @class_ivars
end

#cvars ⇒ Object (readonly)

Returns the value of attribute cvars.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def cvars
  @cvars
end

#declared_types ⇒ Object (readonly)

Returns the value of attribute declared_types.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def declared_types
  @declared_types
end

#discovered_classes ⇒ Object (readonly)

Returns the value of attribute discovered_classes.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def discovered_classes
  @discovered_classes
end

#discovered_def_nodes ⇒ Object (readonly)

Returns the value of attribute discovered_def_nodes.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def discovered_def_nodes
  @discovered_def_nodes
end

#discovered_includes ⇒ Object (readonly)

Returns the value of attribute discovered_includes.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def discovered_includes
  @discovered_includes
end

#discovered_method_visibilities ⇒ Object (readonly)

Returns the value of attribute discovered_method_visibilities.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def discovered_method_visibilities
  @discovered_method_visibilities
end

#discovered_methods ⇒ Object (readonly)

Returns the value of attribute discovered_methods.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def discovered_methods
  @discovered_methods
end

#discovered_superclasses ⇒ Object (readonly)

Returns the value of attribute discovered_superclasses.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def discovered_superclasses
  @discovered_superclasses
end

#environment ⇒ Object (readonly)

Returns the value of attribute environment.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def environment
  @environment
end

#fact_store ⇒ Object (readonly)

Returns the value of attribute fact_store.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def fact_store
  @fact_store
end

#globals ⇒ Object (readonly)

Returns the value of attribute globals.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def globals
  @globals
end

#in_source_constants ⇒ Object (readonly)

Returns the value of attribute in_source_constants.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def in_source_constants
  @in_source_constants
end

#indexed_narrowings ⇒ Object (readonly)

Returns the value of attribute indexed_narrowings.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def indexed_narrowings
  @indexed_narrowings
end

#ivars ⇒ Object (readonly)

Returns the value of attribute ivars.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def ivars
  @ivars
end

#locals ⇒ Object (readonly)

Returns the value of attribute locals.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def locals
  @locals
end

#method_chain_narrowings ⇒ Object (readonly)

Returns the value of attribute method_chain_narrowings.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def method_chain_narrowings
  @method_chain_narrowings
end

#program_globals ⇒ Object (readonly)

Returns the value of attribute program_globals.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def program_globals
  @program_globals
end

#self_type ⇒ Object (readonly)

Returns the value of attribute self_type.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def self_type
  @self_type
end

#source_path ⇒ Object (readonly)

Returns the value of attribute source_path.



19
20
21
 
# File 'lib/rigor/scope.rb', line 19

def source_path
  @source_path
end

Class Method Details

.empty(environment: Environment.default, source_path: nil) ⇒ Object 



71
72
73
74
 
# File 'lib/rigor/scope.rb', line 71

def empty(environment: Environment.default, source_path: nil)
  new(environment: environment, locals: {}.freeze,
      fact_store: Analysis::FactStore.empty, source_path: source_path)
end

Instance Method Details

#==(other) ⇒ Object Also known as: eql? 



521
522
523
524
525
526
527
528
529
530
531
532
 
# File 'lib/rigor/scope.rb', line 521

def ==(other)
  other.is_a?(Scope) &&
    environment.equal?(other.environment) &&
    @locals == other.locals &&
    fact_store == other.fact_store &&
    self_type == other.self_type &&
    @ivars == other.ivars &&
    @cvars == other.cvars &&
    @globals == other.globals &&
    @indexed_narrowings == other.indexed_narrowings &&
    @method_chain_narrowings == other.method_chain_narrowings
end

#class_cvars_for(class_name) ⇒ Object

Slice 7 phase 6 — class-level cvar accumulator (same shape as ‘class_ivars` but populated from `Prism::ClassVariableWriteNode` writes, and seeded on BOTH instance and singleton method bodies because Ruby cvars are visible from each).



249
250
251
252
253
 
# File 'lib/rigor/scope.rb', line 249

def class_cvars_for(class_name)
  return EMPTY_VAR_BINDINGS if class_name.nil?

  @class_cvars[class_name.to_s] || EMPTY_VAR_BINDINGS
end

#class_ivars_for(class_name) ⇒ Object

Slice 7 phase 2 — class-level ivar accumulator. Keyed by the qualified class name (e.g. ‘“Rigor::Scope”`); the value is a `Hash[Symbol, Type::t]` of every ivar that appears as a write target inside any def body of that class. `StatementEvaluator#build_method_entry_scope` seeds the method body’s ‘ivars` map from this table so a `def get; @x; end` reads the type written in a sibling `def init; @x = 1; end`.

‘ScopeIndexer` populates the table once at index time through a separate pre-pass over the program. The map is frozen and shared by structural reference across every derived scope.



235
236
237
238
239
 
# File 'lib/rigor/scope.rb', line 235

def class_ivars_for(class_name)
  return EMPTY_VAR_BINDINGS if class_name.nil?

  @class_ivars[class_name.to_s] || EMPTY_VAR_BINDINGS
end

#cvar(name) ⇒ Object 



198
199
200
 
# File 'lib/rigor/scope.rb', line 198

def cvar(name)
  @cvars[name.to_sym]
end

#discovered_method?(class_name, method_name, kind) ⇒ Boolean

Slice 7 phase 12 — in-source method discovery. Maps a qualified class name to a ‘Hash[Symbol, Symbol]` of `method_name => :instance | :singleton`. Populated by `ScopeIndexer` from every `Prism::DefNode` and recognised `define_method` invocation inside class/module bodies. The `rigor check` undefined-method and wrong-arity rules consult this map to suppress diagnostics for methods the user has defined dynamically, even when no RBS sig describes them.

Returns:

  • (Boolean) 


305
306
307
308
309
310
 
# File 'lib/rigor/scope.rb', line 305

def discovered_method?(class_name, method_name, kind)
  table = @discovered_methods[class_name.to_s]
  return false unless table

  table[method_name.to_sym] == kind
end

#discovered_method_visibility(class_name, method_name) ⇒ Object

v0.1.2 — per-class table mapping ‘method_name (Symbol) →:public | :private | :protected`. Populated by `ScopeIndexer` for every `def` it sees inside a class body, with the visibility taken from the surrounding `private` / `protected` / `public` modifier state plus any post-hoc `private :name, …` named-argument calls. Consumed by the `def.method-visibility-mismatch` rule so explicit-non-self calls to a private method surface a diagnostic.



394
395
396
397
398
399
 
# File 'lib/rigor/scope.rb', line 394

def discovered_method_visibility(class_name, method_name)
  table = @discovered_method_visibilities[class_name.to_s]
  return nil unless table

  table[method_name.to_sym]
end

#evaluate(node, tracer: nil) ⇒ Object

Statement-level evaluation: returns the pair ‘[type, scope’]‘ where `type` is what the node produces and `scope’‘ is the scope observable after the node has run. The receiver scope is never mutated. See Inference::StatementEvaluator for the catalogue of nodes that thread scope; everything else defers to #type_of and returns the receiver scope unchanged.



496
497
498
 
# File 'lib/rigor/scope.rb', line 496

def evaluate(node, tracer: nil)
  Inference::StatementEvaluator.new(scope: self, tracer: tracer).evaluate(node)
end

#facts_for(target: nil, bucket: nil) ⇒ Object 



478
479
480
 
# File 'lib/rigor/scope.rb', line 478

def facts_for(target: nil, bucket: nil)
  fact_store.facts_for(target: target, bucket: bucket)
end

#global(name) ⇒ Object 



202
203
204
 
# File 'lib/rigor/scope.rb', line 202

def global(name)
  @globals[name.to_sym]
end

#hash ⇒ Object 



535
536
537
 
# File 'lib/rigor/scope.rb', line 535

def hash
  [Scope, environment.object_id, @locals, fact_store, self_type, @ivars, @cvars, @globals].hash
end

#includes_of(class_name) ⇒ Object

ADR-24 slice 2 — per-class/module table mapping a fully qualified user class or module to the list of module names it ‘include`s / `prepend`s, AS WRITTEN at the mixin call. Populated by `ScopeIndexer` (per-file plus the cross-file pre-pass) and consumed by `ExpressionTyper#resolve_user_def_through_ancestors` so an implicit-self call resolves against an included module’s ‘def`s, not just the superclass chain. As-written names are resolved to qualified classes at walk time.



377
378
379
 
# File 'lib/rigor/scope.rb', line 377

def includes_of(class_name)
  @discovered_includes[class_name.to_s] || []
end

#indexed_narrowing(receiver_kind, receiver_name, key) ⇒ Object

Closes the “‘params ||= []; params << x`” precision gap (ROADMAP § Type-language / engine — indexed-collection narrowing through `Hash ||= default`). After `receiver ||= default`, the next read at `receiver` is known non-nil; recording the post-`||=` type keyed on `(receiver_kind, receiver_name, literal_key)` lets the ExpressionTyper’s ‘[]` dispatch hand back the narrowed type. Receiver-rebind and `[]=`/mutator invalidation rules are documented at the call sites in `Inference::StatementEvaluator`.



415
416
417
 
# File 'lib/rigor/scope.rb', line 415

def indexed_narrowing(receiver_kind, receiver_name, key)
  @indexed_narrowings[indexed_key(receiver_kind, receiver_name, key)]
end

#ivar(name) ⇒ Object

Slice 7 phase 1 — instance/class/global variable bindings. ‘ivar(name)` / `cvar(name)` / `global(name)` return the type currently bound for the named variable, or `nil` when the variable has not been written in the analyzed slice of the program. The first cut tracks bindings only within a single method body (each `def` enters with a fresh binding map), so reads in other methods of the same class fall through to `Dynamic`. Cross-method ivar/cvar inference is a follow-up slice.



194
195
196
 
# File 'lib/rigor/scope.rb', line 194

def ivar(name)
  @ivars[name.to_sym]
end

#join(other) ⇒ Object

Joins this scope with another at a control-flow merge point. The joined scope is bound to every local that BOTH branches bind, with the type widened to the union of both sides. Names bound in only one branch are dropped from the joined scope; the eventual statement-level evaluator (Slice 3 phase 2) is responsible for nil-injecting half-bound names where the language semantics demand it. The two scopes MUST share the same Environment.

Raises:

  • (ArgumentError) 


507
508
509
510
511
512
513
514
515
516
517
518
519
 
# File 'lib/rigor/scope.rb', line 507

def join(other)
  raise ArgumentError, "join requires a Rigor::Scope, got #{other.class}" unless other.is_a?(Scope)

  unless environment.equal?(other.environment)
    raise ArgumentError, "join requires both scopes to share the same Environment"
  end

  joined_locals = join_bindings(locals, other.locals)
  joined_ivars = join_bindings(ivars, other.ivars)
  joined_cvars = join_bindings(cvars, other.cvars)
  joined_globals = join_bindings(globals, other.globals)
  build_joined_scope(joined_locals, joined_ivars, joined_cvars, joined_globals, other)
end

#local(name) ⇒ Object 



123
124
125
 
# File 'lib/rigor/scope.rb', line 123

def local(name)
  @locals[name.to_sym]
end

#local_facts(name, bucket: nil) ⇒ Object 



482
483
484
 
# File 'lib/rigor/scope.rb', line 482

def local_facts(name, bucket: nil)
  facts_for(target: Analysis::FactStore::Target.local(name), bucket: bucket)
end

#method_chain_narrowing(receiver_kind, receiver_name, method_name) ⇒ Object

Closes the “stable receiver method-chain narrowing” gap (ROADMAP § Future cycles / Type-language / engine —“Method-call receiver narrowing across stable receivers”; 2026-05-28 Redmine survey). After ‘if x.last.is_a?(Array)` the dominated body’s ‘x.last` reads MUST observe the truthy-narrowed type; the same chain reaching the falsey edge observes the negative narrowing.

Address shape mirrors #indexed_narrowing: stable root variable + no-arg single-hop method name. See ChainKey for the precise contract.



452
453
454
 
# File 'lib/rigor/scope.rb', line 452

def method_chain_narrowing(receiver_kind, receiver_name, method_name)
  @method_chain_narrowings[chain_key(receiver_kind, receiver_name, method_name)]
end

#superclass_of(class_name) ⇒ Object

ADR-24 slice 2 — per-class table mapping a fully qualified user-class name to its superclass name AS WRITTEN at the ‘class Foo < Bar` declaration (`“Bar”`, possibly a qualified `“A::B”`). Populated by `ScopeIndexer` — per-file plus the cross-file project pre-pass — and consumed by `ExpressionTyper#try_user_method_inference` to walk the superclass chain when an implicit-self call does not resolve against the enclosing class’s own defs. The as-written name is resolved to a qualified class at walk time against the call’s lexical nesting.



360
361
362
 
# File 'lib/rigor/scope.rb', line 360

def superclass_of(class_name)
  @discovered_superclasses[class_name.to_s]
end

#top_level_def_for(method_name) ⇒ Object

v0.0.3 A — top-level def lookup for implicit-self calls. Returns the ‘Prism::DefNode` for a top-level (or DSL-block-nested, outside any class body) `def <method_name>` in the file, or nil. The sentinel key is owned by `Inference::ScopeIndexer::TOP_LEVEL_DEF_KEY`; consumers should treat its presence as an opaque implementation detail and go through this accessor.



339
340
341
342
343
344
 
# File 'lib/rigor/scope.rb', line 339

def top_level_def_for(method_name)
  table = @discovered_def_nodes[Inference::ScopeIndexer::TOP_LEVEL_DEF_KEY]
  return nil unless table

  table[method_name.to_sym]
end

#type_of(node, tracer: nil) ⇒ Object 



486
487
488
 
# File 'lib/rigor/scope.rb', line 486

def type_of(node, tracer: nil)
  Inference::ExpressionTyper.new(scope: self, tracer: tracer).type_of(node)
end

#user_def_for(class_name, method_name) ⇒ Object

v0.0.2 #5 — per-class table mapping ‘method_name (Symbol) → Prism::DefNode`. Populated by `ScopeIndexer` alongside `discovered_methods` for instance-side defs only (singleton-side and `define_method`-introduced methods do not contribute a static body the engine can re-type). Consumed by `ExpressionTyper` to do inter-procedural return-type inference when the receiver class is user-defined and has no RBS sig.



325
326
327
328
329
330
 
# File 'lib/rigor/scope.rb', line 325

def user_def_for(class_name, method_name)
  table = @discovered_def_nodes[class_name.to_s]
  return nil unless table

  table[method_name.to_sym]
end

#with_class_cvars(table) ⇒ Object 



255
256
257
 
# File 'lib/rigor/scope.rb', line 255

def with_class_cvars(table)
  rebuild(class_cvars: table)
end

#with_class_ivars(table) ⇒ Object 



241
242
243
 
# File 'lib/rigor/scope.rb', line 241

def with_class_ivars(table)
  rebuild(class_ivars: table)
end

#with_cvar(name, type) ⇒ Object 



214
215
216
 
# File 'lib/rigor/scope.rb', line 214

def with_cvar(name, type)
  rebuild(cvars: @cvars.merge(name.to_sym => type).freeze)
end

#with_declared_types(table) ⇒ Object

Slice A-declarations. Returns a scope that carries an identity-comparing Hash of ‘Prism::Node => Rigor::Type` overrides. `ExpressionTyper#type_of(node)` MUST consult `declared_types` before any other dispatch and return the recorded type as-is when present. The table is populated by `ScopeIndexer` for declaration-position nodes (the `constant_path` of `Prism::ModuleNode` and `Prism::ClassNode`) so a `module Foo` / `class Bar` header types as `Singleton[<qualified path>]` instead of falling through to `Dynamic`. The table is shared by structural reference across every derived scope so `with_local` / `with_fact` / `with_self_type` carry it transparently.



181
182
183
 
# File 'lib/rigor/scope.rb', line 181

def with_declared_types(table)
  rebuild(declared_types: table)
end

#with_discovered_classes(table) ⇒ Object

Slice 7 phase 7 — in-source class discovery. Maps a qualified class name (e.g. ‘“Account”`) to its `Type::Singleton` so references to user-defined classes in the analyzed files resolve through `ExpressionTyper#resolve_constant_name` even when no RBS decl exists. Populated once at index time by `ScopeIndexer` from every `Prism::ClassNode` and `Prism::ModuleNode` it walks.



277
278
279
 
# File 'lib/rigor/scope.rb', line 277

def with_discovered_classes(table)
  rebuild(discovered_classes: table)
end

#with_discovered_def_nodes(table) ⇒ Object 



346
347
348
 
# File 'lib/rigor/scope.rb', line 346

def with_discovered_def_nodes(table)
  rebuild(discovered_def_nodes: table)
end

#with_discovered_includes(table) ⇒ Object 



381
382
383
 
# File 'lib/rigor/scope.rb', line 381

def with_discovered_includes(table)
  rebuild(discovered_includes: table)
end

#with_discovered_method_visibilities(table) ⇒ Object 



401
402
403
 
# File 'lib/rigor/scope.rb', line 401

def with_discovered_method_visibilities(table)
  rebuild(discovered_method_visibilities: table)
end

#with_discovered_methods(table) ⇒ Object 



312
313
314
 
# File 'lib/rigor/scope.rb', line 312

def with_discovered_methods(table)
  rebuild(discovered_methods: table)
end

#with_discovered_superclasses(table) ⇒ Object 



364
365
366
 
# File 'lib/rigor/scope.rb', line 364

def with_discovered_superclasses(table)
  rebuild(discovered_superclasses: table)
end

#with_fact(fact) ⇒ Object 



145
146
147
 
# File 'lib/rigor/scope.rb', line 145

def with_fact(fact)
  rebuild(fact_store: fact_store.with_fact(fact))
end

#with_global(name, type) ⇒ Object 



218
219
220
 
# File 'lib/rigor/scope.rb', line 218

def with_global(name, type)
  rebuild(globals: @globals.merge(name.to_sym => type).freeze)
end

#with_in_source_constants(table) ⇒ Object

Slice 7 phase 9 — in-source constant-value tracking. Maps a qualified constant name (e.g. ‘“BUCKETS”` or `“Rigor::Analysis::FactStore::BUCKETS”`) to the type of the rvalue assigned at its `Prism::ConstantWriteNode` / `Prism::ConstantPathWriteNode`. Populated by `ScopeIndexer` once at index time. `ExpressionTyper#resolve_constant_name` consults this map after class lookups so an in-source constant assignment overrides any RBS-declared constant of the same qualified name (matching Ruby’s runtime precedence: a constant defined in user code is the authoritative value).



292
293
294
 
# File 'lib/rigor/scope.rb', line 292

def with_in_source_constants(table)
  rebuild(in_source_constants: table)
end

#with_indexed_narrowing(receiver_kind, receiver_name, key, type) ⇒ Object 



419
420
421
422
423
424
 
# File 'lib/rigor/scope.rb', line 419

def with_indexed_narrowing(receiver_kind, receiver_name, key, type)
  new_table = @indexed_narrowings.merge(
    indexed_key(receiver_kind, receiver_name, key) => type
  ).freeze
  rebuild(indexed_narrowings: new_table)
end

#with_ivar(name, type) ⇒ Object 



206
207
208
209
210
211
212
 
# File 'lib/rigor/scope.rb', line 206

def with_ivar(name, type)
  new_indexed_narrowings = drop_indexed_narrowings_for(:ivar, name)
  new_chain_narrowings = drop_chain_narrowings_for(:ivar, name)
  rebuild(ivars: @ivars.merge(name.to_sym => type).freeze,
          indexed_narrowings: new_indexed_narrowings,
          method_chain_narrowings: new_chain_narrowings)
end

#with_local(name, type) ⇒ Object 



127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
 
# File 'lib/rigor/scope.rb', line 127

def with_local(name, type)
  new_locals = @locals.merge(name.to_sym => type).freeze
  new_fact_store = fact_store.invalidate_target(Analysis::FactStore::Target.local(name))
  # Rebinding `name` invalidates every "after `receiver[key]
  # ||= default`" narrowing keyed on it — the slot at `name[*]`
  # is reachable through the old binding only, so the
  # next read against the new binding does not inherit the
  # earlier non-nil guarantee. The same logic applies to
  # method-chain narrowings: `x.last` after `x = something_new`
  # is a call on the new binding and any prior `is_a?`-driven
  # narrowing keyed on `(local, :x, :last)` no longer holds.
  new_indexed_narrowings = drop_indexed_narrowings_for(:local, name)
  new_chain_narrowings = drop_chain_narrowings_for(:local, name)
  rebuild(locals: new_locals, fact_store: new_fact_store,
          indexed_narrowings: new_indexed_narrowings,
          method_chain_narrowings: new_chain_narrowings)
end

#with_method_chain_narrowing(receiver_kind, receiver_name, method_name, type) ⇒ Object 



456
457
458
459
460
461
 
# File 'lib/rigor/scope.rb', line 456

def with_method_chain_narrowing(receiver_kind, receiver_name, method_name, type)
  new_table = @method_chain_narrowings.merge(
    chain_key(receiver_kind, receiver_name, method_name) => type
  ).freeze
  rebuild(method_chain_narrowings: new_table)
end

#with_program_globals(table) ⇒ Object

Slice 7 phase 6 — program-level globals accumulator. Globals are process-wide in Ruby, so the analyzer carries a single map (‘Hash[Symbol, Type]`) keyed by the variable name and seeded into every method body (instance and singleton) plus the top-level program scope. `ScopeIndexer` populates it from a single program-wide pre-pass.



265
266
267
 
# File 'lib/rigor/scope.rb', line 265

def with_program_globals(table)
  rebuild(program_globals: table)
end

#with_self_type(type) ⇒ Object

Slice A-engine. Returns a scope with ‘self_type` set to `type`, preserving locals and facts. `StatementEvaluator` injects this at class-body and method-body boundaries; `ExpressionTyper` consults it when typing `Prism::SelfNode` and implicit-self `Prism::CallNode` receivers.



154
155
156
 
# File 'lib/rigor/scope.rb', line 154

def with_self_type(type)
  rebuild(self_type: type)
end

#with_source_path(path) ⇒ Object

ADR-11 per-call-site assertion gating prerequisite. The analyzer’s per-file boundary stamps the current source file’s path onto the seed scope; nested rebuilds carry the value through so plugin hooks like ‘flow_contribution_for` can resolve “which file does this call site belong to?” without thread-locals.



164
165
166
 
# File 'lib/rigor/scope.rb', line 164

def with_source_path(path)
  rebuild(source_path: path)
end

#without_indexed_narrowing(receiver_kind, receiver_name, key) ⇒ Object 



426
427
428
429
430
431
432
 
# File 'lib/rigor/scope.rb', line 426

def without_indexed_narrowing(receiver_kind, receiver_name, key)
  lookup = indexed_key(receiver_kind, receiver_name, key)
  return self unless @indexed_narrowings.key?(lookup)

  new_table = @indexed_narrowings.reject { |k, _| k == lookup }.freeze
  rebuild(indexed_narrowings: new_table)
end

#without_indexed_narrowings_for(receiver_kind, receiver_name) ⇒ Object 



434
435
436
437
438
439
 
# File 'lib/rigor/scope.rb', line 434

def without_indexed_narrowings_for(receiver_kind, receiver_name)
  new_table = drop_indexed_narrowings_for(receiver_kind, receiver_name)
  return self if new_table.equal?(@indexed_narrowings)

  rebuild(indexed_narrowings: new_table)
end

#without_method_chain_narrowing(receiver_kind, receiver_name, method_name) ⇒ Object 



463
464
465
466
467
468
469
 
# File 'lib/rigor/scope.rb', line 463

def without_method_chain_narrowing(receiver_kind, receiver_name, method_name)
  lookup = chain_key(receiver_kind, receiver_name, method_name)
  return self unless @method_chain_narrowings.key?(lookup)

  new_table = @method_chain_narrowings.reject { |k, _| k == lookup }.freeze
  rebuild(method_chain_narrowings: new_table)
end

#without_method_chain_narrowings_for(receiver_kind, receiver_name) ⇒ Object 



471
472
473
474
475
476
 
# File 'lib/rigor/scope.rb', line 471

def without_method_chain_narrowings_for(receiver_kind, receiver_name)
  new_table = drop_chain_narrowings_for(receiver_kind, receiver_name)
  return self if new_table.equal?(@method_chain_narrowings)

  rebuild(method_chain_narrowings: new_table)
end