Provides an online web editor for CAIE Pseudocode, with syntax highlighting, and a javascript-based interpreter for the language. Website URL: The web interpreter The code I written is quite low quality, so try not to go very deep into the code.
Below are some basic examples of the syntax of the language.
- Variable declaration
DECLARE <Identifier>: <Type> - Variable assignment
<Identifier> <- <Expression> - Array declaration
DECLARE <Identifier>: ARRAY[0:<Size>] OF <Type> - Array assignment
<Identifier>[<Index>] <- <Expression> - If statement
IF <Expression> THEN <Statements> ELSE <Statements> ENDIF - While loop
WHILE <Expression> <Statements> ENDWHILE - For loop
FOR <Identifier> <- <Expression> TO <Expression> <Statements> ENDFOR - Output statement
OUTPUT <Expression> - Comments
// This is a comment
- Functions & Procedures
- Struct & Pointer
- Optimise the interpreter
- File operations
- Only supports Array with the lower boundary of 0. (e.g.
ARRAY[0:10] OF INTEGER)Personally I think it is stupid to start an array from non-zero index.
The interpreter is written in pure front-end (everything is imported by CDN, I know it is shit) javascript (will be a backend version in the future). It is simply a tree-walk interpreter using LL(1) parsing, with a few optimizations. The interpreter is not very efficient, and is not intended for production use. It is only intended for educational purposes.
The editor uses the monaco editor for the editing system and uses xterm.js to setup a fake terminal for the IO system. Element-ui is also used for layout.
Contributions are welcome. Please open a a pull request if you would like to contribute. You are also welcome to give your own test samples. (If you found any bugs or have any suggestions, you're welcome to open an issue.)
Ps: Most of this README.md is written by copilot. So it is likely to be a piece of shit.