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src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/parser/Lexer.java

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rev 1392 : 8134484: disallow backquotes as heredoc end marker delimiters


1436      *
1437      * @return TRUE if is a here string.
1438      */
1439     private boolean scanHereString(final LineInfoReceiver lir) {
1440         assert ch0 == '<' && ch1 == '<';
1441         if (scripting) {
1442             // Record beginning of here string.
1443             final State saved = saveState();
1444 
1445             // << or <<<
1446             final boolean excludeLastEOL = ch2 != '<';
1447 
1448             if (excludeLastEOL) {
1449                 skip(2);
1450             } else {
1451                 skip(3);
1452             }
1453 
1454             // Scan identifier. It might be quoted, indicating that no string editing should take place.
1455             final char quoteChar = ch0;
1456             final boolean noStringEditing = isStringDelimiter(quoteChar);
1457             if (noStringEditing) {
1458                 skip(1);
1459             }
1460             final int identStart = position;
1461             final int identLength = scanIdentifier();
1462             if (noStringEditing) {
1463                 if (ch0 != quoteChar) {
1464                     error(Lexer.message("here.non.matching.delimiter"), last, position, position);
1465                     restoreState(saved);
1466                     return false;
1467                 }
1468                 skip(1);
1469             }
1470 
1471             // Check for identifier.
1472             if (identLength == 0) {
1473                 // Treat as shift.
1474                 restoreState(saved);
1475 
1476                 return false;




1436      *
1437      * @return TRUE if is a here string.
1438      */
1439     private boolean scanHereString(final LineInfoReceiver lir) {
1440         assert ch0 == '<' && ch1 == '<';
1441         if (scripting) {
1442             // Record beginning of here string.
1443             final State saved = saveState();
1444 
1445             // << or <<<
1446             final boolean excludeLastEOL = ch2 != '<';
1447 
1448             if (excludeLastEOL) {
1449                 skip(2);
1450             } else {
1451                 skip(3);
1452             }
1453 
1454             // Scan identifier. It might be quoted, indicating that no string editing should take place.
1455             final char quoteChar = ch0;
1456             final boolean noStringEditing = quoteChar == '"' || quoteChar == '\'';
1457             if (noStringEditing) {
1458                 skip(1);
1459             }
1460             final int identStart = position;
1461             final int identLength = scanIdentifier();
1462             if (noStringEditing) {
1463                 if (ch0 != quoteChar) {
1464                     error(Lexer.message("here.non.matching.delimiter"), last, position, position);
1465                     restoreState(saved);
1466                     return false;
1467                 }
1468                 skip(1);
1469             }
1470 
1471             // Check for identifier.
1472             if (identLength == 0) {
1473                 // Treat as shift.
1474                 restoreState(saved);
1475 
1476                 return false;
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