PostFix
Repl Commands
Quit: :q
Debug On: :d+
Debug Off: :d-
Postfix program
(postfix [<value>*] (<command>*))
Note:
<domain-variable>see below forvalueandcommand.*means zero or more than one
Postfix value
Integer: {0, 1, 2, ...}
Executable Sequence: (<command>*)
Postfix command
Integer: {0, 1, 2, ...}
Pop: pop
Swap: swap
Nget: nget
Sel: sel
Exec: exec
Arithmetic Operations: add, sub, mul, div, rem
Relational Operations: lt, eq, gt
Executable Sequence: (<command>*)
Example
[info] running io.github.heyrutvik.postfix.Repl
postfix> :d+
debug message turned on!
postfix> (postfix [4 5] ((2 (3 mul add) exec) 1 swap exec sub))
((2 (3 mul add) exec) 1 swap exec sub) [4 5]
(1 swap exec sub) [(2 (3 mul add) exec) 4 5]
(swap exec sub) [1 (2 (3 mul add) exec) 4 5]
(exec sub) [(2 (3 mul add) exec) 1 4 5]
(2 (3 mul add) exec sub) [1 4 5]
((3 mul add) exec sub) [2 1 4 5]
(exec sub) [(3 mul add) 2 1 4 5]
(3 mul add sub) [2 1 4 5]
(mul add sub) [3 2 1 4 5]
(add sub) [6 1 4 5]
(sub) [7 4 5]
() [-3 5]
value = -3
postfix> :d-
debug message turned off!
postfix> (postfix [4 5] ((2 (3 mul add) exec) 1 swap exec sub))
value = -3
postfix> [(2 add) 3]
stack = [(2 add) 3]
postfix> (2 (3 mul add) exec)
commands = (2 (3 mul add) exec)
postfix> :q
See you soon!