groovy_compiler

Description

This a simple compiler written in Groovy

How to compile

This project compiles with gradle Run

./gradlew uberjar

Note that the gradlew script was made for an Unix environment. It might not work on other OS.

How to run

Once you've compiled the jar file, you can execute it with java such as below

java -jar build/libs/interpreter-1.0.jar

This will pop a window where you can write code and execute it directly. A program consists of a list of functions. There has to be a main function, this is the function that will be executed.

The output will be display on the console, in the bottom of the window

What is supported (currently)

Types

Integer

Float

Character

String

Boolean

TODO

Constants variables

not for array example: const int a = 2;

Arrays

array declaration: taille optionnelle

Arithmetic expressions

It supports basic and boolean operators e.g:

4 + 2
4 - (6 * 4 / 2)
5 % (4 - 4 * (5 - 3))
(1 >= 2) or (3 != 2)
(3 and 0) == (0 or 0)

Variables

You can declare, and assign values to variables:

var x;
x = 14;
var y = 3;
var z = x + 5* y;

for and while loops

for and while loops are handled, like in the following example

for (int i = 0; i < 10; i++) {
    print(i);
}

var i = 0;
while (i < 10) {
    print(i);
    i = i + 1;
}

You can print the value of variable with the print function

Other features

final variables

TODO

switch

You can use switch like in the following example:

switch (a) {
  default:
    print("No match");
  case 1:
    print("1 case");
    break;
  case 2:
  case 3:
    print("2 and 3case");
  case 4:
    print("4 case");
}

String as char[]

string can be considered as char array, and are therefore mutable

string s = "hello";
s[0] = 'y';
char c = s[2];
print(s);

TODO: itialization of assignement between char[] string and vice-versa

Break, Continue

break and continue are handled. Here are a few example

int a = 2;
while(a < 10) {
  if (a % 2 == 0) {
    continue;
  }
  if (a == 5) {
    break;
  }
  a = somethingElse();
}

switch (a) {
  case 1:
    print("1");
    break;
  case 2:
    print("2");
    break;
}

Ternary

You can also use expressions like

a >= b ? a : b

Error handling

When there is an error while compiling, the error is displayed on the console You can see what caused the error (the line and column of the error is displayed but it is not working, sometimes there is a little offset for the column).

##Write a program A source code should have functions, with one named main() with no parameters like in the following example

add1(a) {
    return a + 1;
}

main() {
   print add1(6);
}

The main() function will be executed

nelson888/myprogramminglanguage