A simple programming language:
make
java me/vasan/jimple/Jimple ./tests/hello.sim
// declarations
let foo; // foo is initialized with nil
let foo = "hello"; // strings
let bar = 12.3; // double-precision floating point
let baz = true; // boolean
// blocks
{
let bar = 43;
let baz = false;
bar = 32;
}
// first-class functions
let quux = function (bar, baz) {
return bar + baz;
}
// statements
if (foo > 32) {
bar = 32;
} else {
baz = 32.1;
}
while (foo > 32) {
// do something
}
// objects, arrays
let foo = [1, 2, 3];
foo[3]; // nil
// objects
let Rect = {
length: 12,
width: 24,
name: "hello",
approved: false
};// time & date: clock();
// io: print()
let pi = 3.14;
let e = 2.718;
let expt = function(a, n) {
if (n == 0) {
return 1;
} else {
let e = 1; let i = 0;
while (i < n) {
i = i+1;
e = e*a;
}
return e;
}
};
print(expt(2,pi));
print(expt(3,e));compiles to a equivalent java class
package expt;
// Imports for supporting classes
import me.vasan.jimple.NativeFunction;
import me.vasan.jimple.errors.RuntimeError;
// Every sim file gets compiled into a top-level class
class expt {
// Every var decl. gets compiled to a static field
static double pi = 3.14;
static double e = 2.718;
// Every function decl. gets compiled into a static function
public static double expt(double a, double n) {
if (n == 0) {
return 1;
} else {
double e = 1;
double i = 0;
while (i < n) {
i = i + 1;
e = e * a;
}
return e;
}
}
// Any other statements get shoved into a main() function
public static void main(String[] args) throws RuntimeError {
// NativeFunction calls such as print, clock are called appropriately
new NativeFunction("print").call(expt(2, pi));
new NativeFunction("print").call(expt(3, e));
}
}