haskell-parser

This is the final project of Haskell@Tsinghua.

In this project, we are asked to implement a code parser with specific given grammar using Haskell language.

This project is managed with Stack, a cross-platform program for developing Haskell projects.

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To build the project, go to src directory and run:

$ stack build

Parser Mode

Usage:

1. sh $ stack exec haskell-parser -- -i <file> -o <file>

   parse and execute the code from input file and output the results to another file

2. sh $ stack exec haskell-parser -- -i <file>

   parse and execute the code from input file and output the results to stdout

3. sh $ stack exec haskell-parser -- -t <file> -o <file>

   parse and the code from input file and output the abstract syntax tree (AST) to another file

4. sh $ stack exec haskell-parser -- -t <file>

   parse and the code from input file and output the AST to stdout

Real-Eval-Print-Loop (REPL) Mode

Usage:

To enter REPL mode, run:

$ stack exec haskell-parser -- -repl

In REPL mode, there are three commands:

1. sh > :q quit
2. sh > :i <file-name> load and parse the program in the file and output the results
3. sh > :t print the AST of the last program

Otherwise, any string input with 'Enter' will be regarded as a part of code (expression, statement, whatever) and executed.

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For now, it supports some data type (Boolean, Floating-point Number, Char, String, List) and some control logics from imperative programming (like assignment, if-else, while-skip, begin)