javacc-7.0.4.src.main.resources.templates.cpp.ParseException.cc.template Maven / Gradle / Ivy
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JavaCC is a parser/scanner generator for Java.
\#include "ParseException.h"
#if NAMESPACE
namespace ${NAMESPACE_OPEN}
#fi
/**
* This exception is thrown when parse errors are encountered.
* You can explicitly create objects of this exception type by
* calling the method generate_ParseException in the generated
* parser.
*
* You can modify this class to customize your error reporting
* mechanisms so long as you retain the fields.
*/
/**
* This constructor is used by the method "generate_ParseException"
* in the generated parser. Calling this constructor generates
* a new object of this type with the fields "currentToken",
* "expectedTokenSequences", and "tokenImage" set.
*/
ParseException::ParseException(Token currentTokenVal,
int** expectedTokenSequencesVal,
JJString* tokenImageVal
)
{
initialise(currentTokenVal, expectedTokenSequencesVal, tokenImageVal);
currentToken = currentTokenVal;
expectedTokenSequences = expectedTokenSequencesVal;
tokenImage = tokenImageVal;
}
/**
* The following constructors are for use by you for whatever
* purpose you can think of. Constructing the exception in this
* manner makes the exception behave in the normal way - i.e., as
* documented in the class "Throwable". The fields "errorToken",
* "expectedTokenSequences", and "tokenImage" do not contain
* relevant information. The JavaCC generated code does not use
* these constructors.
*/
ParseException::ParseException() {
}
/** Constructor with message. */
ParseException::ParseException(const JJString& message) {
}
/**
* This is the last token that has been consumed successfully. If
* this object has been created due to a parse error, the token
* followng this token will (therefore) be the first error token.
*/
Token currentToken;
/**
* Each entry in this array is an array of integers. Each array
* of integers represents a sequence of tokens (by their ordinal
* values) that is expected at this point of the parse.
*/
int** expectedTokenSequences;
/**
* This is a reference to the "tokenImage" array of the generated
* parser within which the parse error occurred. This array is
* defined in the generated ...Constants class.
*/
JJString* tokenImage;
/**
* It uses "currentToken" and "expectedTokenSequences" to generate a parse
* error message and returns it. If this object has been created
* due to a parse error, and you do not catch it (it gets thrown
* from the parser) the correct error message
* gets displayed.
*/
JJString ParseException::initialise(Token currentToken,
int** expectedTokenSequences,
JJString* tokenImage) {
\#if 0
//JJString eol = System.getProperty("line.separator", "\n");
expected = new JJString();
int maxSize = 0;
for (int i = 0; i < expectedTokenSequences.length; i++) {
if (maxSize < expectedTokenSequences[i].length) {
maxSize = expectedTokenSequences[i].length;
}
for (int j = 0; j < expectedTokenSequences[i].length; j++) {
expected.append(tokenImage[expectedTokenSequences[i][j]]).append(' ');
}
if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) {
expected.append((JJChar*)"...");
}
expected.append(eol).append(" ");
}
JJString retval = (JJChar*)"Encountered \"";
Token tok = currentToken.next;
for (int i = 0; i < maxSize; i++) {
if (i != 0) retval += (JJChar*)" ";
if (tok.kind == 0) {
retval += tokenImage[0];
break;
}
retval += (JJChar*)" " + tokenImage[tok.kind];
retval += (JJChar*)" \"";
retval += add_escapes(tok.image);
retval += (JJChar*)" \"";
tok = tok.next;
}
retval += (JJChar*)"\" at line " + currentToken.next.beginLine + (JJChar*)", column " + currentToken.next.beginColumn;
retval += (JJChar*)"." + eol;
if (expectedTokenSequences.length == 1) {
retval += (JJChar*)"Was expecting:" + eol + (JJChar*)" ";
} else {
retval += (JJChar*)"Was expecting one of:" + eol + (JJChar*)" ";
}
retval += expected.toString();
return retval;
\#endif
return (JJChar*)"Parse exception";
}
/**
* The end of line JJString for this machine.
*/
\#define eol "\n"
/**
* Used to convert raw characters to their escaped version
* when these raw version cannot be used as part of an ASCII
* string literal.
*/
JJString ParseException::add_escapes(const JJString& str) {
/*
JJString *retval = new JJString();
JJChar ch;
for (int i = 0; i < str.length(); i++) {
switch (str.charAt(i))
{
case '\b':
retval.append("\\b");
continue;
case '\t':
retval.append("\\t");
continue;
case '\n':
retval.append("\\n");
continue;
case '\f':
retval.append("\\f");
continue;
case '\r':
retval.append("\\r");
continue;
case '\"':
retval.append("\\\"");
continue;
case '\'':
retval.append("\\\'");
continue;
case '\\':
retval.append("\\\\");
continue;
default:
if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
JJString s = "0000" + Integer.toString(ch, 16);
retval.append("\\u" + s.substring(s.length() - 4, s.length()));
} else {
retval.append(ch);
}
continue;
}
}
return retval.toString();
*/ return str;
}
#if NAMESPACE
${NAMESPACE_CLOSE}
#fi