Model:
	elements+=int_lit;
	
int_lit:
	decimal_lit | octal_lit | hex_lit
;

decimal_lit:
	DECIMAL_DIGIT (DECIMAL_DIGIT)*
;

octal_lit:
	"0" OCTAL_DIGIT*
;

hex_lit:
	"0" ( "x" | "X" ) HEX_DIGIT HEX_DIGIT*
;
	
terminal IDENTIFIER: 
	LETTER (LETTER | DECIMAL_DIGIT)*
;

terminal A_F: 
	"A" .. "F" | "a" .. "f" 
;

terminal LETTER:
	A_F | 'g' .. 'z' | 'G' .. 'Z' | "_"
;

terminal HEX_DIGIT:
	DECIMAL_DIGIT | A_F
;

terminal OCTAL_DIGIT:
	('0'..'7')
;

terminal ESCAPED_CHAR:
	"\\" ( "a" | "b" | "f" | "n" | "r" | "t" | "v" | "\\" | "\'" | "\"" )
;

terminal DECIMAL_DIGIT:
	OCTAL_DIGIT | '8' | '9';

terminal BINARY_OP:
	"||" | "&&" | REL_OP | ADD_OP | MUL_OP
;

terminal REL_OP:
	"==" | "!=" | "<" | "<=" | ">" | ">="
;

terminal ADD_OP:
	"+" | "-" | "|" | "^"
;

terminal MUL_OP:
	"*" | "/" | "%" | "<<" | ">>" | "&" | "&^"
;

terminal UNARY_OP:
	"+" | "-" | "!" | "^" | "*" | "&" | "<-"
;