/* Generated By:CSharpCC: Do not edit this line. TokenMgrError.cs Version 3.0 */ | |
public class TokenMgrError : System.SystemException | |
{ | |
/* | |
* Ordinals for various reasons why an Exceptions of this type can be thrown. | |
*/ | |
/** | |
* Lexical error occured. | |
*/ | |
internal static readonly int LexicalError = 0; | |
/** | |
* An attempt wass made to create a second instance of a static token manager. | |
*/ | |
internal static readonly int StaticLexerError = 1; | |
/** | |
* Tried to change to an invalid lexical state. | |
*/ | |
internal static readonly int InvalidLexicalState = 2; | |
/** | |
* Detected (and bailed out of) an infinite loop in the token manager. | |
*/ | |
internal static readonly int LoopDetected = 3; | |
/** | |
* Indicates the reason why the exception is thrown. It will have | |
* one of the above 4 values. | |
*/ | |
int errorCode; | |
/** | |
* Replaces unprintable characters by their espaced (or unicode escaped) | |
* equivalents in the given string | |
*/ | |
protected static string AddEscapes(string str) { | |
System.Text.StringBuilder retval = new System.Text.StringBuilder(); | |
char ch; | |
for (int i = 0; i < str.Length; i++) { | |
switch (str[i]) { | |
case '\0' : | |
continue; | |
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[i]) < 0x20 || ch > 0x7e) { | |
string s = "0000" + System.Convert.ToString((int)ch, 16); | |
retval.Append("\\u" + s.Substring(s.Length - 4, s.Length - (s.Length - 4))); | |
} else { | |
retval.Append(ch); | |
} | |
continue; | |
} | |
} | |
return retval.ToString(); | |
} | |
/** | |
* Returns a detailed message for the Exception when it is thrown by the | |
* token manager to indicate a lexical error. | |
* Parameters : | |
* EOFSeen : indicates if EOF caused the lexicl error | |
* curLexState : lexical state in which this error occured | |
* errorLine : line number when the error occured | |
* errorColumn : column number when the error occured | |
* errorAfter : prefix that was seen before this error occured | |
* curchar : the offending character | |
* Note: You can customize the lexical error message by modifying this method. | |
*/ | |
protected static string GetLexicalError(bool EOFSeen, int lexState, int errorLine, int errorColumn, string errorAfter, char curChar) { | |
return("Lexical error at line " + | |
errorLine + ", column " + | |
errorColumn + ". Encountered: " + | |
(EOFSeen ? "<EOF> " : ("\"" + AddEscapes(curChar.ToString()) + "\"") + " (" + (int)curChar + "), ") + | |
"after : \"" + AddEscapes(errorAfter) + "\""); | |
} | |
/** | |
* You can also modify the body of this method to customize your error messages. | |
* For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not | |
* of end-users concern, so you can return something like : | |
* | |
* "Internal Error : Please file a bug report .... " | |
* | |
* from this method for such cases in the release version of your parser. | |
*/ | |
public override string Message { | |
get { return base.Message; } | |
} | |
/* | |
* Constructors of various flavors follow. | |
*/ | |
public TokenMgrError() { | |
} | |
public TokenMgrError(string message, int reason) : | |
base(message) { | |
errorCode = reason; | |
} | |
public TokenMgrError(bool EOFSeen, int lexState, int errorLine, int errorColumn, string errorAfter, char curChar, int reason) : | |
this(GetLexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason) { | |
} | |
} |