Borsch Interpreter

Features

The code is very similar to PHP
Written in C++ with STL, clear OOP
No external library dependencies
Bool, int, float and string data types
Global and local variables
C/C++ like evaluation of expressions
If-else, for, while statements
Buildin and user defined functions
Return, break and continue structured jumps
Preprocessor file includes
Colored errors/warnings output
Development dumps to the XML format

License

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

(whole text)

Code example

[woq@plecka ~/borsch]$ cat scripts/factorial_inc.txt
function factorial($number)
{
        if($number < 2)
                return 1;
        else
                return $number * factorial($number - 1);
}
[woq@plecka ~/borsch]$ cat scripts/factorial.txt
include("scripts/factorial_inc.txt");

echo("Factorial of numbers from 0 to 9:\n");
echo("==================================\n");

for($i = 0; $i <= 9; $i++)
        echo("Factorial of " + $i + " is " + factorial($i) + "\n");

[woq@plecka ~/borsch]$ ./borsch
Usage: ./borsch [--lex-dump] [--call-tree-dump] <filename>
[woq@plecka ~/borsch]$ ./borsch scripts/factorial.txt
Factorial of numbers from 0 to 9:
==================================
Factorial of 0 is 1
Factorial of 1 is 1
Factorial of 2 is 2
Factorial of 3 is 6
Factorial of 4 is 24
Factorial of 5 is 120
Factorial of 6 is 720
Factorial of 7 is 5040
Factorial of 8 is 40320
Factorial of 9 is 362880
[woq@plecka ~/borsch]$

Notes

This interpreter was created as a semestral project to the Programming Languages and Compilers (X36PJP) at Czech Technical University in Prague, Faculty of Electrical Engineering. Special thanks to Ladislav Vagner.