More string literals getters.

pkg/analyzer/lib/src/generated/ast.dart

 // Copyright (c) 2014, 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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.ast;
 
 import 'dart:collection';
@@ skipping 16027 matching lines @@
    */
   Element get toolkitElement => _toolkitElement;
 
   /**
    * Return the value of the literal.
    *
    * @return the value of the literal
    */
   String get value => _value;
 
-  /**
-   * Return `true` if this string literal is a multi-line string.
-   *
-   * @return `true` if this string literal is a multi-line string
-   */
+  @override
   bool get isMultiline {
     String lexeme = literal.lexeme;
     if (lexeme.length < 6) {

[Paul Berry, 2014/10/07 16:30:55]

Change this to "if (lexeme.length < 3)".  Otherwise we won't correctly identify
incomplete multiline strings.

[scheglov, 2014/10/07 18:11:09]

Pushed this change into another analyzer CL:
https://codereview.chromium.org/637003002

       return false;
     }
-    return StringUtilities.endsWith3(lexeme, 0x22, 0x22, 0x22) || StringUtilities.endsWith3(lexeme, 0x27, 0x27, 0x27);
+    // skip 'r'
+    int offset = 0;
+    if (lexeme.codeUnitAt(0) == 0x72) {

[Paul Berry, 2014/10/07 16:30:55]

Nit: for readability it would be nice to change this to "if (isRaw)".  Your call
though.

+      offset = 1;
+    }
+    // check prefix
+    return StringUtilities.startsWith3(lexeme, offset, 0x22, 0x22, 0x22) ||
+        StringUtilities.startsWith3(lexeme, offset, 0x27, 0x27, 0x27);
   }
 
+  @override
   bool get isRaw => literal.lexeme.codeUnitAt(0) == 0x72;
 
   @override
+  bool get isSingleQuoted {
+    String lexeme = literal.lexeme;
+    if (lexeme.isEmpty) {
+      return false;
+    }
+    int codeZero = lexeme.codeUnitAt(0);
+    if (codeZero == 0x72) {
+      return lexeme.length > 1 && lexeme.codeUnitAt(1) == 0x27;
+    }
+    return codeZero == 0x27;
+  }
+
+  @override
   bool get isSynthetic => literal.isSynthetic;
 
   /**
    * Set the toolkit specific, non-Dart, element associated with this literal.
    *
    * @param element the toolkit specific element to be associated with this literal
    */
   void set toolkitElement(Element element) {
     _toolkitElement = element;
   }
@@ skipping 100 matching lines @@
     return element.contentsOffset;
   }
 
   @override
   int get contentsEnd {
     InterpolationString element = _elements.last;
     return element.contentsEnd;
   }
 
   @override
+  bool get isMultiline {
+    InterpolationString element = _elements.first;
+    String lexeme = element._contents.lexeme;
+    if (lexeme.length < 3) {
+      return false;
+    }
+    return StringUtilities.startsWith3(lexeme, 0, 0x22, 0x22, 0x22) ||
+        StringUtilities.startsWith3(lexeme, 0, 0x27, 0x27, 0x27);
+  }
+
+  @override
   bool get isRaw => false;
+
+
+  @override
+  bool get isSingleQuoted {
+    InterpolationString lastString = _elements.first;
+    String lexeme = lastString._contents.lexeme;
+    return StringUtilities.startsWithChar(lexeme, 0x27);
+  }
 }
 
 /**
  * Instances of the class `StringLiteral` represent a string literal expression.
  *
  * <pre>
  * stringLiteral ::=
  *     [SimpleStringLiteral]
  *   | [AdjacentStrings]
  *   | [StringInterpolation]
@@ skipping 41 matching lines @@
    * Return the offset of the first contents character.
    */
   int get contentsOffset;
 
   /**
    * Return the offset of the after-last contents character.
    */
   int get contentsEnd;
 
   /**
+   * Return `true` if this string literal is a multi-line string.
+   */
+  bool get isMultiline;
+
+  /**
    * Return `true` if this string literal is a raw string.
    */
   bool get isRaw;
+
+  /**
+   * Return `true` if this string literal uses single qoutes (' or ''').
+   * Return `false` if this string literal uses double qoutes (" or """).
+   */
+  bool get isSingleQuoted;
 }
 
 /**
  * Instances of the class `SuperConstructorInvocation` represent the invocation of a
  * superclass' constructor from within a constructor's initialization list.
  *
  * <pre>
  * superInvocation ::=
  *     'super' ('.' [SimpleIdentifier])? [ArgumentList]
  * </pre>
@@ skipping 3402 matching lines @@
     _elements[index] = node;
   }
   void clear() {
     _elements = <E> [];
   }
   int get length => _elements.length;
   void set length(int value) {
     throw new UnsupportedError("Cannot resize NodeList.");
   }
 }