[cleanup] Remove some leftover strong mode code from the parser

src/parsing/parser-base.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_PARSING_PARSER_BASE_H
 #define V8_PARSING_PARSER_BASE_H
 
 #include "src/ast/scopes.h"
 #include "src/bailout-reason.h"
 #include "src/base/hashmap.h"
@@ skipping 372 matching lines @@
       return next_materialized_literal_index_;
     }
 
     void SkipMaterializedLiterals(int count) {
       next_materialized_literal_index_ += count;
     }
 
     void AddProperty() { expected_property_count_++; }
     int expected_property_count() { return expected_property_count_; }
 
-    Scanner::Location this_location() const { return this_location_; }
-    Scanner::Location super_location() const { return super_location_; }
-    Scanner::Location return_location() const { return return_location_; }
-    void set_this_location(Scanner::Location location) {
-      this_location_ = location;
-    }
-    void set_super_location(Scanner::Location location) {
-      super_location_ = location;
-    }
-    void set_return_location(Scanner::Location location) {
-      return_location_ = location;
-    }
-
     bool is_generator() const { return IsGeneratorFunction(kind_); }
     bool is_async_function() const { return IsAsyncFunction(kind_); }
     bool is_resumable() const { return is_generator() || is_async_function(); }
 
     FunctionKind kind() const { return kind_; }
     FunctionState* outer() const { return outer_function_state_; }
 
     void set_generator_object_variable(
         typename Traits::Type::GeneratorVariable* variable) {
       DCHECK(variable != NULL);
@@ skipping 64 matching lines @@
     }
 
     // Used to assign an index to each literal that needs materialization in
     // the function.  Includes regexp literals, and boilerplate for object and
     // array literals.
     int next_materialized_literal_index_;
 
     // Properties count estimation.
     int expected_property_count_;
 
-    // Location of most recent use of 'this' (invalid if none).
-    Scanner::Location this_location_;
-
-    // Location of most recent 'return' statement (invalid if none).
-    Scanner::Location return_location_;
-
-    // Location of call to the "super" constructor (invalid if none).
-    Scanner::Location super_location_;
-
     FunctionKind kind_;
     // For generators, this variable may hold the generator object. It variable
     // is used by yield expressions and return statements. It is not necessary
     // for generator functions to have this variable set.
     Variable* generator_object_variable_;
 
     FunctionState** function_state_stack_;
     FunctionState* outer_function_state_;
 
     ZoneList<DestructuringAssignment> destructuring_assignments_to_rewrite_;
@@ skipping 736 matching lines @@
   bool allow_harmony_trailing_commas_;
 };
 
 template <class Traits>
 ParserBase<Traits>::FunctionState::FunctionState(
     FunctionState** function_state_stack, ScopeState** scope_stack,
     Scope* scope, FunctionKind kind)
     : ScopeState(scope_stack, scope),
       next_materialized_literal_index_(0),
       expected_property_count_(0),
-      this_location_(Scanner::Location::invalid()),
-      return_location_(Scanner::Location::invalid()),
-      super_location_(Scanner::Location::invalid()),
       kind_(kind),
       generator_object_variable_(NULL),
       function_state_stack_(function_state_stack),
       outer_function_state_(*function_state_stack),
       destructuring_assignments_to_rewrite_(16, scope->zone()),
       tail_call_expressions_(scope->zone()),
       return_expr_context_(ReturnExprContext::kInsideValidBlock),
       non_patterns_to_rewrite_(0, scope->zone()),
       reported_errors_(16, scope->zone()),
       next_function_is_parenthesized_(false),
@@ skipping 1826 matching lines @@
       IsClassConstructor(kind)) {
     if (peek() == Token::PERIOD || peek() == Token::LBRACK) {
       scope->RecordSuperPropertyUsage();
       return this->NewSuperPropertyReference(this->scope(), factory(), pos);
     }
     // new super() is never allowed.
     // super() is only allowed in derived constructor
     if (!is_new && peek() == Token::LPAREN && IsSubclassConstructor(kind)) {
       // TODO(rossberg): This might not be the correct FunctionState for the
       // method here.
-      function_state_->set_super_location(scanner()->location());
       return this->NewSuperCallReference(this->scope(), factory(), pos);
     }
   }
 
   ReportMessageAt(scanner()->location(), MessageTemplate::kUnexpectedSuper);
   *ok = false;
   return this->EmptyExpression();
 }
 
 template <class Traits>
@@ skipping 253 matching lines @@
     // If next token is not `=>`, it's a syntax error anyways.
     ReportUnexpectedTokenAt(scanner_->peek_location(), Token::ARROW);
     *ok = false;
     return this->EmptyExpression();
   }
 
   typename Traits::Type::StatementList body;
   int num_parameters = formal_parameters.scope->num_parameters();
   int materialized_literal_count = -1;
   int expected_property_count = -1;
-  Scanner::Location super_loc;
 
   FunctionKind arrow_kind = is_async ? kAsyncArrowFunction : kArrowFunction;
   {
     FunctionState function_state(&function_state_, &scope_state_,
                                  formal_parameters.scope, arrow_kind);
 
     function_state.SkipMaterializedLiterals(
         formal_parameters.materialized_literals_count);
 
     this->ReindexLiterals(formal_parameters);
@@ skipping 43 matching lines @@
         body->Add(factory()->NewReturnStatement(expression, pos), zone());
         if (allow_tailcalls() && !is_sloppy(language_mode())) {
           // ES6 14.6.1 Static Semantics: IsInTailPosition
           this->MarkTailPosition(expression);
         }
       }
       materialized_literal_count = function_state.materialized_literal_count();
       expected_property_count = function_state.expected_property_count();
       this->MarkCollectedTailCallExpressions();
     }
-    super_loc = function_state.super_location();
 
     formal_parameters.scope->set_end_position(scanner()->location().end_pos);
 
     // Arrow function formal parameters are parsed as StrictFormalParameterList,
     // which is not the same as "parameters of a strict function"; it only means
     // that duplicates are not allowed.  Of course, the arrow function may
     // itself be strict as well.
     const bool allow_duplicate_parameters = false;
     this->ValidateFormalParameters(&formals_classifier, language_mode(),
                                    allow_duplicate_parameters, CHECK_OK);
@@ skipping 11 matching lines @@
   FunctionLiteralT function_literal = factory()->NewFunctionLiteral(
       this->EmptyIdentifierString(), formal_parameters.scope, body,
       materialized_literal_count, expected_property_count, num_parameters,
       FunctionLiteral::kNoDuplicateParameters,
       FunctionLiteral::kAnonymousExpression,
       FunctionLiteral::kShouldLazyCompile, arrow_kind,
       formal_parameters.scope->start_position());
 
   function_literal->set_function_token_position(
       formal_parameters.scope->start_position());
-  if (super_loc.IsValid()) function_state_->set_super_location(super_loc);
 
   if (fni_ != NULL) this->InferFunctionName(fni_, function_literal);
 
   return function_literal;
 }
 
 
 template <typename Traits>
 typename ParserBase<Traits>::ExpressionT
 ParserBase<Traits>::ParseTemplateLiteral(ExpressionT tag, int start,
@@ skipping 204 matching lines @@
     has_seen_constructor_ = true;
     return;
   }
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSER_BASE_H