Move frog/leg to lib/compiler/implementation.

frog/leg/scanner/partial_parser.dart

-// Copyright (c) 2011, 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.
-
-class PartialParser extends Parser {
-  PartialParser(Listener listener) : super(listener);
-
-  Token parseClassBody(Token token) => skipClassBody(token);
-
-  Token fullParseClassBody(Token token) => super.parseClassBody(token);
-
-  Token parseExpression(Token token) => skipExpression(token);
-
-  Token skipExpression(Token token) {
-    while (true) {
-      final kind = token.kind;
-      final value = token.stringValue;
-      if ((kind === EOF_TOKEN) ||
-          (value === ';') ||
-          (value === ',') ||
-          (value === ']'))
-        return token;
-      if (value === '=') {
-        var nextValue = token.next.stringValue;
-        if (nextValue === 'const') {
-          token = token.next;
-          nextValue = token.next.stringValue;
-        }
-        if (nextValue === '{') {
-          // Handle cases like this:
-          // class Foo {
-          //   var map;
-          //   Foo() : map = {};
-          // }
-          BeginGroupToken begin = token.next;
-          token = (begin.endGroup !== null) ? begin.endGroup : token;
-          token = token.next;
-          continue;
-        }
-        if (nextValue === '<') {
-          // Handle cases like this:
-          // class Foo {
-          //   var map;
-          //   Foo() : map = <Foo>{};
-          // }
-          BeginGroupToken begin = token.next;
-          token = (begin.endGroup !== null) ? begin.endGroup : token;
-          token = token.next;
-          if (token.stringValue === '{') {
-            begin = token;
-            token = (begin.endGroup !== null) ? begin.endGroup : token;
-            token = token.next;
-          }
-          continue;
-        }
-      }
-      if (!mayParseFunctionExpressions && value === '{')
-        return token;
-      if ((value !== '<') && (token is BeginGroupToken)) {
-        BeginGroupToken begin = token;
-        token = (begin.endGroup !== null) ? begin.endGroup : token;
-      }
-      token = token.next;
-    }
-  }
-
-  Token skipClassBody(Token token) {
-    if (!optional('{', token)) {
-      return listener.expectedClassBodyToSkip(token);
-    }
-    BeginGroupToken beginGroupToken = token;
-    assert(beginGroupToken.endGroup === null ||
-           beginGroupToken.endGroup.kind === $CLOSE_CURLY_BRACKET);
-    return beginGroupToken.endGroup;
-  }
-
-  Token parseFunctionBody(Token token, bool isExpression) {
-    assert(!isExpression);
-    String value = token.stringValue;
-    if (value === ';') {
-      // No body.
-    } else if (value === '=>') {
-      token = parseExpression(token.next);
-      expectSemicolon(token);
-    } else {
-      token = skipBlock(token);
-    }
-    // There is no "skipped function body event", so we use
-    // handleNoFunctionBody instead.
-    listener.handleNoFunctionBody(token);
-    return token;
-  }
-
-  Token parseFormalParameters(Token token) => skipFormals(token);
-
-  Token skipFormals(Token token) {
-    listener.beginOptionalFormalParameters(token);
-    if (!optional('(', token)) {
-      if (optional(';', token)) {
-        listener.recoverableError("expected '('", token: token);
-        return token;
-      }
-      return listener.unexpected(token);
-    }
-    BeginGroupToken beginGroupToken = token;
-    Token endToken = beginGroupToken.endGroup;
-    listener.endFormalParameters(0, token, endToken);
-    return endToken.next;
-  }
-}