[antlr-interest] REAL or int or Range
Alexander Gängel
alexander at gaengel.de
Wed Jan 9 08:55:59 PST 2008
I have a Problem in My grammar
I try to decide if I got in Integer an Real or an Range like 0..9
It works for Int and Real but if I input 0..9 in Antlrworks in the Input
frame is only 9 and the Parse Tree is like ths:
Where is the Rest of my Input?
My grammar is like this:
grammar test;
start :
uint_or_real
|(uint_or_real RANGE uint_or_real)+;
uint_or_real
:
UINT
|REAL;
REAL
:
UINT
(
Exponent FloatTypeSuffix?
|FloatTypeSuffix
|
(DOT (UINT Exponent? FloatTypeSuffix?
)
)
);
fragment
Exponent : ('e'|'E') ('+'|'-')? UINT ;
UINT : DIGIT_10+ ;
fragment DIGIT_10 : '0'..'9' ;
fragment
FloatTypeSuffix : ('f'|'F'|'d'|'D') ;
RANGE : '..';
DOT : '.';
WS : (' '|'\r'|'\t'|'\u000C'|'\n') {$channel=HIDDEN;};
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