Remove support for operator negate and replace occurrences with unary

runtime/vm/parser.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/parser.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/compiler_stats.h"
@@ skipping 2405 matching lines @@
     // empty parameter list is no longer supported.
     if (CurrentToken() == Token::kLPAREN) {
       ConsumeToken();
       ExpectToken(Token::kRPAREN);
     }
   }
 
   // Now that we know the parameter list, we can distinguish between the
   // unary and binary operator -.
   if (method->has_operator &&
-      ((method->name->Equals(Token::Str(Token::kNEGATE))) ||
-      method->name->Equals("-")) &&
+      method->name->Equals("-") &&
       (method->params.num_fixed_parameters == 1)) {
     // Patch up name for unary operator - so it does not clash with the
     // name for binary operator -.
     *method->name = Symbols::New("unary-");
   }
 
   if (members->FunctionNameExists(*method->name, method->kind)) {
     ErrorMsg(method->name_pos,
              "field or method '%s' already defined", method->name->ToCString());
   }
@@ skipping 324 matching lines @@
   intptr_t expected_num_parameters;  // Includes receiver.
   if (operator_token == Token::kASSIGN_INDEX) {
     expected_num_parameters = 3;
   } else if (operator_token == Token::kSUB) {
     if (member.params.num_fixed_parameters == 1) {
       // Unary operator minus (i.e. negate).
       expected_num_parameters = 1;
     } else {
       expected_num_parameters = 2;
     }
-  } else if ((operator_token == Token::kNEGATE) ||
-      (operator_token == Token::kBIT_NOT)) {
-    // TODO(hausner): Remove support for keyword 'negate'.
+  } else if (operator_token == Token::kBIT_NOT) {
     expected_num_parameters = 1;
   } else {
     expected_num_parameters = 2;
   }
   if ((member.params.num_optional_parameters > 0) ||
       member.params.has_optional_positional_parameters ||
       member.params.has_optional_named_parameters ||
       (member.params.num_fixed_parameters != expected_num_parameters)) {
     // Subtract receiver when reporting number of expected arguments.
     ErrorMsg(member.name_pos, "operator %s expects %"Pd" argument(s)",
@@ skipping 6687 matching lines @@
 void Parser::SkipQualIdent() {
   ASSERT(IsIdentifier());
   ConsumeToken();
   if (CurrentToken() == Token::kPERIOD) {
     ConsumeToken();  // Consume the kPERIOD token.
     ExpectIdentifier("identifier expected after '.'");
   }
 }
 
 }  // namespace dart