Implement experimental exponentiation operator

src/ast.cc

 // 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.
 
 #include "src/ast.h"
 
 #include <cmath>  // For isfinite.
 #include "src/builtins.h"
 #include "src/code-stubs.h"
 #include "src/contexts.h"
@@ skipping 94 matching lines @@
     case Token::ASSIGN_BIT_XOR: return Token::BIT_XOR;
     case Token::ASSIGN_BIT_AND: return Token::BIT_AND;
     case Token::ASSIGN_SHL: return Token::SHL;
     case Token::ASSIGN_SAR: return Token::SAR;
     case Token::ASSIGN_SHR: return Token::SHR;
     case Token::ASSIGN_ADD: return Token::ADD;
     case Token::ASSIGN_SUB: return Token::SUB;
     case Token::ASSIGN_MUL: return Token::MUL;
     case Token::ASSIGN_DIV: return Token::DIV;
     case Token::ASSIGN_MOD: return Token::MOD;
+    case Token::ASSIGN_EXP: return Token::EXP;
     default: UNREACHABLE();
   }
   return Token::ILLEGAL;
 }
 
 
 bool FunctionLiteral::AllowsLazyCompilation() {
   return scope()->AllowsLazyCompilation();
 }
 
@@ skipping 884 matching lines @@
 // static
 bool Literal::Match(void* literal1, void* literal2) {
   const AstValue* x = static_cast<Literal*>(literal1)->raw_value();
   const AstValue* y = static_cast<Literal*>(literal2)->raw_value();
   return (x->IsString() && y->IsString() && *x->AsString() == *y->AsString()) ||
          (x->IsNumber() && y->IsNumber() && x->AsNumber() == y->AsNumber());
 }
 
 
 } }  // namespace v8::internal