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header
{
package org.eclipse.gymnast.examples.game.lang.gen.parser;
import org.eclipse.gymnast.examples.game.lang.gen.ast.*;
import org.eclipse.gymnast.runtime.core.parser.*;
import org.eclipse.gymnast.runtime.core.ast.*;
}
class GameParser extends Parser;
{
private ParseError createParseError(RecognitionException ex) {
return GameParserDriver.createParseError(ex);
}
private TokenInfo createTokenInfo(Token tok) {
if (tok == null) return null;
else return new TokenInfo(tok.getText(), tok.getColumn(), tok.getType());
}
private ParseContext _parseContext;
public void setParseContext(ParseContext parseContext) {
_parseContext = parseContext;
}
public void reportError(RecognitionException ex) {
if (_parseContext != null) {
_parseContext.addParseMessage(createParseError(ex));
}
}
public void reportError(String s) {
if (_parseContext != null) {
_parseContext.addParseMessage(new ParseError(s, -1));
}
}
public void reportWarning(String s) {
if (_parseContext != null) {
_parseContext.addParseMessage(new ParseWarning(s, -1));
}
}
}
commandList returns [ CommandList retVal = new CommandList() ]
:
{ Command command = null; }
( command=command { retVal.addChild(command); } )* EOF
;
command returns [ Command retVal = null ]
:
{ OptReps optReps = null; }
optReps=optReps
( retVal=shoot[optReps]
| retVal=move[optReps]
)
;
optReps returns [ OptReps retVal = null ]
:
( reps:INT_LITERAL )?
{ retVal = new OptReps(createTokenInfo(reps)); }
;
shoot [ OptReps optReps ] returns [ Shoot retVal = null ]
:
fire_KW:"fire" semi:SEMI
{ retVal = new Shoot(optReps, createTokenInfo(fire_KW), createTokenInfo(semi)); }
;
move [ OptReps optReps ] returns [ Move retVal = null ]
:
{ Direction direction = null; }
move_KW:"move" direction=direction semi:SEMI
{ retVal = new Move(optReps, createTokenInfo(move_KW), direction, createTokenInfo(semi)); }
;
direction returns [ Direction retVal = null ]
{ Token tok = LT(1); }
: ( "left"
| "right"
)
{ retVal = new Direction(createTokenInfo(tok)); }
;
class GameLexer extends Lexer;
options
{
testLiterals=false;
k=3;
charVocabulary='\003'..'\377';
}
SEMI : ';';
ID options { testLiterals=true; }
: ('a'..'z' | 'A'..'Z' | '_') ('a'..'z' | 'A'..'Z' | '_' | DIGIT)* ;
INT_LITERAL : (DIGIT)+ ;
protected DIGIT : '0'..'9';
WS : (' ' | '\t' | '\f' | '\r' | '\n')+
{ $setType(Token.SKIP); }
;
SINGLE_LINE_COMMENT : "//" (~('\n'|'\r'))* ('\n'|'\r')?
{ $setType(Token.SKIP); }
;
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