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.



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# 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.



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

def class_cvars
  @class_cvars
end

#class_ivars ⇒ Object (readonly)

Returns the value of attribute class_ivars.



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

def class_ivars
  @class_ivars
end

#cvars ⇒ Object (readonly)

Returns the value of attribute cvars.



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

def cvars
  @cvars
end

#declared_types ⇒ Object (readonly)

Returns the value of attribute declared_types.



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

def declared_types
  @declared_types
end

#discovered_classes ⇒ Object (readonly)

Returns the value of attribute discovered_classes.



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# 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.



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# 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.



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# 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.



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# 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.



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

def discovered_methods
  @discovered_methods
end

#discovered_superclasses ⇒ Object (readonly)

Returns the value of attribute discovered_superclasses.



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

def discovered_superclasses
  @discovered_superclasses
end

#environment ⇒ Object (readonly)

Returns the value of attribute environment.



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

def environment
  @environment
end

#fact_store ⇒ Object (readonly)

Returns the value of attribute fact_store.



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

def fact_store
  @fact_store
end

#globals ⇒ Object (readonly)

Returns the value of attribute globals.



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

def globals
  @globals
end

#in_source_constants ⇒ Object (readonly)

Returns the value of attribute in_source_constants.



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# 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.



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

def indexed_narrowings
  @indexed_narrowings
end

#ivars ⇒ Object (readonly)

Returns the value of attribute ivars.



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

def ivars
  @ivars
end

#locals ⇒ Object (readonly)

Returns the value of attribute locals.



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

def locals
  @locals
end

#method_chain_narrowings ⇒ Object (readonly)

Returns the value of attribute method_chain_narrowings.



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# 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.



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

def program_globals
  @program_globals
end

#self_type ⇒ Object (readonly)

Returns the value of attribute self_type.



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

def self_type
  @self_type
end

#source_path ⇒ Object (readonly)

Returns the value of attribute source_path.



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

def source_path
  @source_path
end

Class Method Details

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



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# 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? 



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

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).



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# 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.



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# 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 



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# 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) 


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# 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.



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# File 'lib/rigor/scope.rb', line 408

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.



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# File 'lib/rigor/scope.rb', line 510

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

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



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# File 'lib/rigor/scope.rb', line 492

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

#global(name) ⇒ Object 



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

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

#hash ⇒ Object 



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# File 'lib/rigor/scope.rb', line 549

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.



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# File 'lib/rigor/scope.rb', line 391

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`.



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# File 'lib/rigor/scope.rb', line 429

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.



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# 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) 


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# File 'lib/rigor/scope.rb', line 521

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 



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

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

#local_facts(name, bucket: nil) ⇒ Object 



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

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.



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# File 'lib/rigor/scope.rb', line 466

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.



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# File 'lib/rigor/scope.rb', line 374

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.



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# File 'lib/rigor/scope.rb', line 353

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

#toplevel? ⇒ Boolean

ADR-34 § “Decision” — predicate identifying a toplevel-shaped scope (no enclosing ‘class` / `module` body). True at the top of a file AND inside a top-level `def` body (since toplevel defs leave `self_type` nil per the existing scope-construction contract, mirroring how ADR-24’s ‘adoptable_self_call_result?` also keys on `self_type.nil?` for the same context). Used by `CheckRules#unresolved_toplevel_diagnostic` to gate the `call.unresolved-toplevel` rule so it fires only outside class / module bodies, where Rails-DSL metaprogramming leniency (ADR-24 WD3 → WD4) does not apply.

Returns:

  • (Boolean) 


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# File 'lib/rigor/scope.rb', line 322

def toplevel?
  @self_type.nil?
end

#type_of(node, tracer: nil) ⇒ Object 



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# File 'lib/rigor/scope.rb', line 500

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.



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# File 'lib/rigor/scope.rb', line 339

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 



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

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

#with_class_ivars(table) ⇒ Object 



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

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

#with_cvar(name, type) ⇒ Object 



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# 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.



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# 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.



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

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

#with_discovered_def_nodes(table) ⇒ Object 



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

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

#with_discovered_includes(table) ⇒ Object 



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# File 'lib/rigor/scope.rb', line 395

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

#with_discovered_method_visibilities(table) ⇒ Object 



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

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

#with_discovered_methods(table) ⇒ Object 



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# File 'lib/rigor/scope.rb', line 326

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

#with_discovered_superclasses(table) ⇒ Object 



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

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

#with_fact(fact) ⇒ Object 



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# 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 



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# 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).



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# 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 



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# File 'lib/rigor/scope.rb', line 433

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 



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# 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 



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# 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 



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# File 'lib/rigor/scope.rb', line 470

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.



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# 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.



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# 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.



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# 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 



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# File 'lib/rigor/scope.rb', line 440

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 



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# File 'lib/rigor/scope.rb', line 448

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 



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# File 'lib/rigor/scope.rb', line 477

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 



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# File 'lib/rigor/scope.rb', line 485

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