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Diffstat (limited to 'trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/InformativeParser.java')
| -rw-r--r-- | trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/InformativeParser.java | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/InformativeParser.java b/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/InformativeParser.java deleted file mode 100644 index c73db34..0000000 --- a/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/InformativeParser.java +++ /dev/null @@ -1,225 +0,0 @@ -package org.mozilla.javascript; - -import java.io.IOException; - -/** - * Subclass of Rhino's Parser that saves information about the token stream - * and error message to allow more helpful error messages. - * - * @author David Greenspan for AppJet - */ - -/* - This class is written with speed in mind, to some extent. Rhino's tokenizer - is pretty efficient, and we wouldn't want to slow it down by, for example, - creating a TokenInfo object on the heap for every token seen. - */ - -/*APPJET*/ -public class InformativeParser extends Parser { - - public static class InformativeEvaluatorException extends EvaluatorException { - final ParseErrorInfo pei; - - InformativeEvaluatorException(String errorMessage, - String sourceName, int lineNumber, - String lineSource, int columnNumber, - ParseErrorInfo peInfo) { - super(errorMessage, sourceName, - lineNumber, lineSource, columnNumber); - pei = peInfo; - } - - public ParseErrorInfo getParseErrorInfo() { - return pei; - } - } - - public static class ParseErrorInfo { - ParseErrorInfo() {} - - String messageId = null; - String messageArg = null; - - final int tokenMaxHistory = 10; - // ring buffers - final int[] tokenTypes = new int[tokenMaxHistory]; - final String[] tokenStrings = new String[tokenMaxHistory]; - final double[] tokenNumbers = new double[tokenMaxHistory]; - final int[] tokenLineNumbers = new int[tokenMaxHistory]; - final int[] tokenLineOffsets = new int[tokenMaxHistory]; - int nextBufPos = 0; - int historyLength = 0; - boolean tokenPeeking = false; - int peekSlot; - - void reportPeekToken(int type, String str, double num, int lineno, - int lineOffset) { - if (! tokenPeeking) { - peekSlot = nextBufPos; - tokenTypes[nextBufPos] = type; - tokenStrings[nextBufPos] = str; - tokenNumbers[nextBufPos] = num; - tokenLineNumbers[nextBufPos] = lineno; - tokenLineOffsets[nextBufPos] = lineOffset; - - nextBufPos++; - if (nextBufPos == tokenMaxHistory) nextBufPos = 0; - if (historyLength < tokenMaxHistory) historyLength++; - tokenPeeking = true; - } - } - - void reportConsumeToken() { - tokenPeeking = false; - } - - private TokenInfo backToken(int n) { - // 0 is most recent token added to history - if (n >= historyLength) return null; - int i = (nextBufPos - 1 - n); - while (i < 0) i += tokenMaxHistory; - return new TokenInfo(tokenTypes[i], tokenStrings[i], - tokenNumbers[i], tokenLineNumbers[i], - tokenLineOffsets[i]); - } - - public String getMessageId() { return messageId; } - public String getMessageArg() { return messageArg; } - public TokenInfo getPeekToken() { - if (tokenPeeking) return backToken(0); - return null; - } - public TokenInfo getPrevToken(int n) { - // 1 = last non-peek token seen, 2 = before that, etc. - if (! tokenPeeking) n--; - return backToken(n); - } - public TokenInfo getPrevToken() { - return getPrevToken(1); - } - } - - public static class TokenInfo { - private int type, lineno, lineOffset; - private String str; - private double num; - TokenInfo(int type, String str, double num, int lineno, - int lineOffset) { - this.type = type; this.str = str; this.num = num; - this.lineno = lineno; this.lineOffset = lineOffset; - } - public int getType() { return type; } - public int getLineNumber() { return lineno; } - public int getLineOffset() { return lineOffset; } - public double getNumber() { return num; } - public String getString() { return str; } - } - - ParseErrorInfo info = new ParseErrorInfo(); - - void doErrorReporterError(String message, String sourceURI, int line, - String lineText, int lineOffset) { - - throw new InformativeEvaluatorException(message, sourceURI, line, - lineText, lineOffset, info); - - } - - public InformativeParser(CompilerEnvirons compilerEnv) { - // we override most calls to the parent's ErrorReporter anyway - super(compilerEnv, DefaultErrorReporter.instance); - } - - @Override int peekToken() throws IOException { - int tt = super.peekToken(); - info.reportPeekToken(tt, ts.getString(), ts.getNumber(), - ts.getLineno(), ts.getOffset()); - return tt; - } - @Override void consumeToken() { - super.consumeToken(); - info.reportConsumeToken(); - } - - @Override void addWarning(String messageId, String messageArg) - { - info.messageId = messageId; - info.messageArg = messageArg; - - String message = ScriptRuntime.getMessage1(messageId, messageArg); - if (compilerEnv.reportWarningAsError()) { - ++syntaxErrorCount; - doErrorReporterError(message, sourceURI, ts.getLineno(), - ts.getLine(), ts.getOffset()); - } - else { /* don't report */ } - } - - @Override void addError(String messageId) - { - info.messageId = messageId; - - ++syntaxErrorCount; - String message = ScriptRuntime.getMessage0(messageId); - doErrorReporterError(message, sourceURI, ts.getLineno(), - ts.getLine(), ts.getOffset()); - } - - @Override void addError(String messageId, String messageArg) - { - info.messageId = messageId; - info.messageArg = messageArg; - - ++syntaxErrorCount; - String message = ScriptRuntime.getMessage1(messageId, messageArg); - doErrorReporterError(message, sourceURI, ts.getLineno(), - ts.getLine(), ts.getOffset()); - } - - @Override protected Decompiler createDecompiler(CompilerEnvirons env) { - return new MyDecompiler(); - } - - public static final ErrorReporter THROW_INFORMATIVE_ERRORS - = new ErrorReporter() { - public void warning(String message, String sourceURI, int line, - String lineText, int lineOffset) { - DefaultErrorReporter.instance.warning - (message, sourceURI, line, lineText, lineOffset); - } - public void error(String message, String sourceURI, int line, - String lineText, int lineOffset) { - DefaultErrorReporter.instance.error - (message, sourceURI, line, lineText, lineOffset); - } - public EvaluatorException runtimeError(String message, - String sourceURI, - int line, String lineText, - int lineOffset) { - return DefaultErrorReporter.instance.runtimeError - (message, sourceURI, line, lineText, lineOffset); - } - - }; - - public static Parser makeParser(CompilerEnvirons compilerEnv, - ErrorReporter errorReporter) { - if (errorReporter == THROW_INFORMATIVE_ERRORS) { - return new InformativeParser(compilerEnv); - } - else { - return new Parser(compilerEnv, errorReporter); - } - } - - private class MyDecompiler extends Decompiler { - @Override void addRegexp(String regexp, String flags) { - super.addRegexp(regexp, flags); - String str = '/'+regexp+'/'+flags; - info.reportPeekToken(Token.REGEXP, str, ts.getNumber(), - ts.getLineno(), ts.getOffset()); - info.reportConsumeToken(); - } - } -}
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