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-rw-r--r--bnftest.224
1 files changed, 24 insertions, 0 deletions
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1tokens = tokPlus tokMinus tokMult tokDivide tokOpenParen tokCloseParen
2 tokEquals tokNumber;
3
4input: line input#
5 |
6 ;
7
8input#: line input#
9 |
10 ;
11
12line: expr tokEquals {print}
13 ;
14
15expr: tokOpenParen expr tokCloseParen expr#
16 | [tokNumber] expr#
17 ;
18
19expr#: tokPlus expr {add} expr#
20 | tokMinus expr {subtract} expr#
21 | tokMult expr {multiply} expr#
22 | tokDivide expr {divide} expr#
23 |
24 ;