JavaScripts interactive shell build
https://developer.mozilla.org/ja/Introduction_to_the_JavaScript_shell
fc9 [0] /root # cat hoge.js function test() { var i = 3; print(i+2); } fc9 [0] /root # js -f hoge.js -f - js> test function test() { var i = 3; print(i + 2); } js> dis(test) main: 00000: int8 3 00002: setvar 0 00005: pop 00006: callname "print" 00009: getvar 0 00012: int8 2 00014: add 00015: call 1 00018: pop 00019: stop Source notes: 0: 0 [ 0] newline 1: 2 [ 2] decl offset 0 3: 6 [ 4] newline 4: 15 [ 9] xdelta 5: 15 [ 0] pcbase offset 9 js> dissrc(test) ;------------------------- 2: var i = 3; 00000: 2 int8 3 00002: 2 setvar 0 00005: 2 pop ;------------------------- 3: print(i+2); 00006: 3 callname "print" 00009: 3 getvar 0 00012: 3 int8 2 00014: 3 add 00015: 3 call 1 00018: 3 pop 00019: 3 stop js> fc9 [0] /root #