Index: src/parsing/parser.cc |
diff --git a/src/parsing/parser.cc b/src/parsing/parser.cc |
index cd7691efc6471fb04537166c23331427701f4578..c3d497542b42b3ba0e1f10b3db1d6171533c0a69 100644 |
--- a/src/parsing/parser.cc |
+++ b/src/parsing/parser.cc |
@@ -438,9 +438,24 @@ bool ParserTraits::ShortcutNumericLiteralBinaryExpression( |
*x = factory->NewNumberLiteral(value, pos, has_dot); |
return true; |
} |
+ case Token::EXP: { |
+ double value = std::pow(x_val, y_val); |
+ int int_value = static_cast<int>(value); |
+ *x = factory->NewNumberLiteral( |
+ int_value == value && value != -0.0 ? int_value : value, pos, |
+ has_dot); |
+ return true; |
+ } |
default: |
break; |
} |
+ } else if (op == Token::EXP) { |
+ Zone* zone = parser_->zone(); |
+ ZoneList<Expression*>* args = new (zone) ZoneList<Expression*>(2, zone); |
+ args->Add(*x, zone); |
+ args->Add(y, zone); |
+ *x = factory->NewCallRuntime(Context::MATH_POW_METHOD_INDEX, args, pos); |
+ return true; |
} |
return false; |
} |
@@ -773,6 +788,8 @@ Parser::Parser(ParseInfo* info) |
set_allow_legacy_const(FLAG_legacy_const); |
set_allow_harmony_do_expressions(FLAG_harmony_do_expressions); |
set_allow_harmony_function_name(FLAG_harmony_function_name); |
+ set_allow_harmony_exponentiation_operator( |
+ FLAG_harmony_exponentiation_operator); |
for (int feature = 0; feature < v8::Isolate::kUseCounterFeatureCount; |
++feature) { |
use_counts_[feature] = 0; |
@@ -4784,6 +4801,7 @@ PreParser::PreParseResult Parser::ParseLazyFunctionBodyWithPreParser( |
SET_ALLOW(strong_mode); |
SET_ALLOW(harmony_do_expressions); |
SET_ALLOW(harmony_function_name); |
+ SET_ALLOW(harmony_exponentiation_operator); |
#undef SET_ALLOW |
} |
PreParser::PreParseResult result = reusable_preparser_->PreParseLazyFunction( |
@@ -5486,6 +5504,11 @@ void ParserTraits::RewriteDestructuringAssignments() { |
parser_->RewriteDestructuringAssignments(); |
} |
+Expression* ParserTraits::RewriteAssignExponentiation(Expression* left, |
+ Expression* right, |
+ int pos) { |
+ return parser_->RewriteAssignExponentiation(left, right, pos); |
+} |
Expression* ParserTraits::RewriteNonPattern( |
Expression* expr, const ExpressionClassifier* classifier, bool* ok) { |
@@ -5581,6 +5604,51 @@ void Parser::RewriteDestructuringAssignments() { |
} |
} |
+Expression* Parser::RewriteAssignExponentiation(Expression* left, |
+ Expression* right, int pos) { |
+ // TODO(bmeurer): remove rewriting craziness and replace with |
+ // backend support for exponent op, some day |
+ ZoneList<Expression*>* args = new (zone()) ZoneList<Expression*>(2, zone()); |
+ if (left->IsVariableProxy()) { |
+ VariableProxy* lhs = left->AsVariableProxy(); |
+ |
+ Expression* result; |
+ DCHECK_NOT_NULL(lhs->raw_name()); |
+ result = |
+ this->ExpressionFromIdentifier(lhs->raw_name(), lhs->position(), |
+ lhs->end_position(), scope_, factory()); |
+ args->Add(left, zone()); |
+ args->Add(right, zone()); |
+ Expression* call = |
+ factory()->NewCallRuntime(Context::MATH_POW_METHOD_INDEX, args, pos); |
+ return factory()->NewAssignment(Token::ASSIGN, result, call, pos); |
+ } else if (left->IsProperty()) { |
+ Property* prop = left->AsProperty(); |
+ auto temp_obj = scope_->NewTemporary(ast_value_factory()->empty_string()); |
+ auto temp_key = scope_->NewTemporary(ast_value_factory()->empty_string()); |
+ Expression* assign_obj = factory()->NewAssignment( |
+ Token::ASSIGN, factory()->NewVariableProxy(temp_obj), prop->obj(), |
+ RelocInfo::kNoPosition); |
+ Expression* assign_key = factory()->NewAssignment( |
+ Token::ASSIGN, factory()->NewVariableProxy(temp_key), prop->key(), |
+ RelocInfo::kNoPosition); |
+ args->Add(factory()->NewProperty(factory()->NewVariableProxy(temp_obj), |
+ factory()->NewVariableProxy(temp_key), |
+ left->position()), |
+ zone()); |
+ args->Add(right, zone()); |
+ Expression* call = |
+ factory()->NewCallRuntime(Context::MATH_POW_METHOD_INDEX, args, pos); |
+ Expression* assign = |
+ factory()->NewAssignment(Token::ASSIGN, left, call, pos); |
+ return factory()->NewBinaryOperation( |
+ Token::COMMA, assign_obj, |
+ factory()->NewBinaryOperation(Token::COMMA, assign_key, assign, pos), |
+ pos); |
+ } else { |
+ return factory()->NewAssignment(Token::ASSIGN_MUL, left, right, pos); |
+ } |
+} |
Expression* Parser::RewriteSpreads(ArrayLiteral* lit) { |
// Array literals containing spreads are rewritten using do expressions, e.g. |