I got bored, so I created a programming language similar to Forth called Tenth. By the way you should check out forth's website!
This project is using termcolor library.
- To build this thing you need to have cmake installed. And if you're building this on Windows, then you will need Visual Studio also.
- After you installed and setup everything, you are going to open console and start typing this, hit enter, you know how it goes.
$ mkdir build
$ cd build
$ cmake ../If you are on linux, you don't have to do anything else anymore. But if you are on Windows, well..
- You are going to compile solution in build folder with visual studio by opening 10th.sln, now you are going to change from Debug to Release and then press ctrl-shift-b. After that you are going to get Release folder and there is executable.
This project is unfinished, so anything can change anytime, be aware of that!
Tenth is a very simple and straightforward programming language, really!
I'll show you...
-
To push a number onto the stack, you need to type:
10
That's it, you pushed number 10!
If you want to add some numbers, you can do it too! Here's how:
10 15 +
If you want to print the result and pop the top of the stack, you can do it too, just type:
10 15 + .
To dump value from the stack, you are going to put "." at the end.
420 .
420 69 . (69 gets dumped)
There's more things in this language, for example, if you want to print the whole stack, you need to type this:
10 25 42 88 90 show
What is "show". It's a opcode that prints the elements of the stack.
If want to do more math you can! Let me show you!
For example, this expression: 2 + 2 * 2 can be written like this:
2 2 * 2 + .
or some other expression like 2 - 2 * 2 - 2 can be written like this:
-2 2 * 2 -2 - .
To divide an number in tenth, you need to type this:
1.0 2.0 / .
To compare two numbers in tenth, you can!
5 is less than 10
5 10 < .
This is going to be true, so the value thats going to be pushed onto stack is -1 representing true.
10 is greater than 50
10 50 > .
This is going to be false, so the value that's going to be pushed onto stack is 0 representing false.
And finally
50 is equal to 50
50 50 = .
This is going to be true, and you already know what value is going to be onto the stack...
To duplicate top value onto stack, you need to have some other value onto stack to be able to duplicate it, so let's get to work:
15 dup show
the result will be
15 15
Droping is almost same as dumping, but you are not printing the value that you've poped from the top of the stack. To drop a value you need to have one already:
10 show drop show
First we are going to push 10 and show the stack. Second we are going to call opcode drop, and then we are going to show stack again.
Result is going to be:
10
(empty)
In order to swap two values, we need to push them to stack.
10 20 show swap show
Result is going to be:
10 20
20 10
Over is not as obvious as the other opcodes. It duplicates second element to the top of the stack. Like this:
420 69 56 show
over show
Result is:
420 69 56
420 69 56 69
Rot opcode is going to rotate first three elements onto stack. The third element from the top of the stack gets moved to the top of the stack, pushing the other two elements down.
1 2 3 show
rot show
Result:
2 3 1
Emit opcode is going to print ascii character. Like this:
65 emit
is going to print 'a' in the console.
Exit is opcode that is going to terminate program with exit code. Like this:
0 exit
Result is 4
To increment top of the stack, you need to do this:
15 inc .
If you want do decrement, you need to do this:
15 dec .
Finally, i added string literals, so now you can push string onto stack. Like this:
"Hello, World!" .
This is going to print Hello, World! in the console.
To print something that is on the stack, you need to do this:
"Hello, " 123 " " 123.5 " World\n" print
This is going to print "Hello, 123 123.5 World".
Licensed under the MIT License, see the LICENSE file.
See the termcolor license.