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###This is a compiler and an interpreter for extended PL/0 grammar, which covers most part of Pascal.

The extended PL/0 grammar is similar to Pascal S grammar (more details below).

Some example source codes of the grammar are provided in test/.

######If you have any question, feel free to reach me at [email protected]. You can learn more about me from my CV.

Installation:

mkdir build

cd build

cmake ..

make

Note: Please make sure you have a c++11 supported compiler.

Usage:

./pl0

Then input the file containing the source code, ex. ../test/test2.

After compilation, the object code (P-code) will be generated and saved in file code, and the interpreter will begin to interpreter the object code and output results.

A detailed design document with various specifications is provided (in Chinese :D)

####More about Pascal S Grammar

To quickly describe the language, we can compare it to the full-blown WIRTH P4 Pascal. The Pascal S does not contain:

• enumeration
• SET
• files
• pointers
• variant records
• procedural types or conformant arrays
• GOTO
• WITH

The complete BNF of Pascal-S can be found in here.

License:

Copyright (C) 2016 by Rui Huang [email protected]

The program CompilerForExPL0 is licensed under the GNU General Public License.

CompilerForExPL0 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, either version 3 of the License, or (at your option) any later version.

CompilerForExPL0 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 CompilerForExPL0. If not, see http://www.gnu.org/licenses/.