A programing language where the only control flow is goto expr
bottles = 99;
s = "s";
OUTPUT (STR) bottles + " bottle" + s + " of beer on the wall,";
OUTPUT (STR) bottles + " bottle" + s + " of beer.";
OUTPUT "Take one down, pass it around,";
bottles = bottles - 1;
s = (bottles > 1) * "s";
GOTO 5 * (bottles == 0) + 8;
OUTPUT (STR) bottles + " bottle" + s + " of beer on the wall.";
OUTPUT "";
GOTO (bottles > 0) + 10;
GOTO 12;
GOTO 2;
OUTPUT "No bottles of beer on the wall.";
- Python 3
- Virtualenv
git clone https://github.com/aDotInTheVoid/gotoLang.git
virtualenv -p python3 venv
source venv/bin/activate
pip3 install plypython3 gotoLang.py path/to/program.gotoall gotoLang keywords are uppercase.
A program is a list of statements separated by semicolons. There are 3 types of statements:
- IO Statements
- GOTO Statements
assign_statement
INPUT some_var_name
Assigns some_var_name to a line read from stdin excluding the \n
OUTPUT expr
Prints the value of expr to stdout
GOTO expr
normally statements are executed sequentially. However after the execution of a GOTO Statements, the next statement executed will be the exprth statement of the program (starting at 0, of course). If expr is not an integer, or out of range, this is a error.
id = expr
sets id to the value of expr
Must match r"""[0-9]+(\.[0-9]+)?"""
Numbers are stored in base 10
Must match r"""\"([^\\\n]|(\\.))*?\""""
Must match r"""[a-zA-Z_][a-zA-Z_0-9]*"""
Operators generally work like c. They can be nested with parenthesis ((,)).
Operators are listed from highest to lowest precedence.
| Operator | Symbol | Precedence | Associativity |
|---|---|---|---|
| Exponential | ^ |
1 | Right |
| Unary Plus | + |
2 | None |
| Unary Minus | - |
2 | None |
| Logical Not | ! |
2 | None |
| Integer Cast | (INT) |
3 | None |
| Bool Cast | (BOOL) |
3 | None |
| Float Cast | (FLOAT) |
3 | None |
| Multiplication | * |
4 | Left |
| Division | / |
4 | Left |
| Modulo | % |
4 | Left |
| Addition | + |
5 | Left |
| Subtraction | - |
5 | Left |
| Less Than | < |
6 | Left |
| Less or Equal | <= |
6 | Left |
| Greater Than | > |
6 | Left |
| Greater or Equal | >= |
6 | Left |
| Equal to | == |
7 | Left |
| Not Equal to | != |
7 | Left |
| Logical And | && |
8 | Left |
| Logical Or | || |
9 | Left |