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/*
* Copyright 2008 Ayman Al-Sairafi ayman.alsairafi@gmail.com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License
* at http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.graalvm.visualvm.modules.oqlsyntax.lexers;
import jsyntaxpane.DefaultLexer;
import jsyntaxpane.Token;
import jsyntaxpane.TokenType;
%%
%public
%class OqlLexer
%extends DefaultLexer
%final
%unicode
%char
%type Token
%caseless
%{
/**
* Default constructor is needed as we will always call the yyreset
*/
public OqlLexer() {
super();
}
/**
* Helper method to create and return a new Token from of TokenType
*/
private Token token(TokenType type) {
return new Token(type, yychar, yylength());
}
%}
/* main character classes */
LineTerminator = \r|\n|\r\n
InputCharacter = [^\r\n]
WhiteSpace = {LineTerminator} | [ \t\f]
/* comments */
Comment = {EndOfLineComment}
EndOfLineComment = "--" {InputCharacter}* {LineTerminator}?
/* identifiers */
Identifier = [:jletter:][:jletterdigit:]*
/* integer literals */
DecIntegerLiteral = 0 | [1-9][0-9]*
/* floating point literals */
FloatLiteral = ({FLit1}|{FLit2}|{FLit3}) {Exponent}? [fF]
FLit1 = [0-9]+ \. [0-9]*
FLit2 = \. [0-9]+
FLit3 = [0-9]+
Exponent = [eE] [+-]? [0-9]+
/* string and character literals */
StringCharacter = [^\r\n\"\\]
SingleCharacter = [^\r\n\'\\]
Reserved =
"SELECT" |
"FROM" |
"INSTANCEOF" |
"WHERE"
%%
<YYINITIAL> {
/* keywords */
{Reserved} { return token(TokenType.KEYWORD); }
/* operators */
"(" |
")" |
"{" |
"}" |
"[" |
"]" |
";" |
"," |
"." |
"@" |
"=" |
">" |
"<" |
"!" |
"~" |
"?" |
":" { return token(TokenType.OPERATOR); }
/* string literal */
\"{StringCharacter}+\" |
\'{SingleCharacter}+\ { return token(TokenType.STRING); }
/* numeric literals */
{DecIntegerLiteral} |
{FloatLiteral} { return token(TokenType.NUMBER); }
/* comments */
{Comment} { return token(TokenType.COMMENT); }
/* whitespace */
{WhiteSpace}+ { /* skip */ }
/* identifiers */
{Identifier} { return token(TokenType.IDENTIFIER); }
}
/* error fallback */
.|\n { }
<<EOF>> { return null; }
|
