This lexical analyzer works for a specified subset of the R languages, hence Mini-R.
The following tokens are recognized:
| Token | Description |
|---|---|
IDENT |
Identifier |
INTCONST |
Int constant |
FLOATCONST |
Float constant |
STRCONST |
String constant |
IF |
if keyword |
ELSE |
else keyword |
WHILE |
while keyword |
FUNCTION |
function keyword |
FOR |
for keyword |
IN |
in keyword |
TRUE |
TRUE keyword |
FALSE |
FALSE keyword |
PRINT |
print keyword |
CAT |
cat keyword |
READ |
read keyword |
LIST |
list keyword |
ADD |
+ operator |
SUB |
- operator |
MULT |
* operator |
DIV |
/ operator |
MOD |
%% operator |
POWER |
^ operator |
LT |
< operator |
GT |
> operator |
LE |
<= operator |
GE |
>= operator |
NE |
!= operator |
NOT |
! operator |
AND |
& operator |
OR |
` |
EQ |
== operator |
ASSIGN |
= operator |
SEMICOLON |
; symbol |
COMMA |
, symbol |
LPAREN |
( symbol |
RPAREN |
) symbol |
LBRACKET |
[ symbol |
RBRACKET |
] symbol |
LBRACE |
{ symbol |
RBRACE |
} symbol |
COMMENT |
Commented line (not shown in output of lexical analyzer) |
QUIT |
quit keyword |
UNKNOWN |
Unknown token |