2Bash

A simple language compiles to bash.

Build

Linux

• git clone
• make
• binary location: bundle/default/bin/sbash.exe

macos

• git clone
• make mac
• binary location: _build/default/bin/sbash.exe

Syntax

// basic type
a=1;		// num 
b="111";	// string 
c=[1,2,3];	// num list
d=true;		// bool

// basic operation
a=1+2*3-4/5;
b="deee"++"233";
c=[1,2,3]@@[4,5,6];
d=1==2;
e=2>3;

// if
a=1;
b=2;
if (a<b) {
    c=2;
} else {
    c=3;
}

// for
a=0;
for (i in [1,2,3]) {
   a=a+i;
}

// while
a=0;
while (a < 5) {
   a=a+1;
}

// define function 
fun foo(a, b , c): string-> num -> bool -> string
{
    return sprintf("%s,%d,%d", a, b , c);
}

Builtin Functions

println

• string|num|bool -> num

  print arg to stdout with newline.

printf

• string->…->num

sprintf

• string->…->string

  return formated string

call

• string -> string

  call external shell command, return its stdout output as string.

  e.g. call(“ls -l”);

exists

• string -> bool

  test if the file(arg) exists or not.

list

• string|num|bool -> string list

  convert string|num|bool to string list

num

• string|bool|num -> num

  convert string|bool|num to num

emacs support

see also 2bash-mode

Todo

• editor support
  • emacs
  • vim
• add `break`, `continue`
• add postion info to compile error