Compiler BASIC-like language to C

Compiler for a BASIC-like language, inspired by the teeny-tiny-compiler by Austin Henley.

Usage Example

1. Write a program in the BASIC-like language and store it in examples/<program_name>.txt. Here we use parse-if.txt

   LET bar = 5
   LET foo = bar * 3 + 2
   IF foo > 0 THEN
       PRINT "yes!"
   ENDIF

2. Compile and run the program

   $ sh compile.sh parse-if
   Filepath input: examples/parse-if.txt
   Filepath output: examples/c-files/parse-if.c
   Compiling...
       Finished release [optimized] target(s) in 0.00s
        Running `target/release/basic-compiler parse-if`
   Running... 
   
   yes!

Getting Started

Pre-requisites

1. Rust + Cargo

Running the application

1. Clone the repository
   HTTPS:

   git clone https://github.com/BraSDon/basic-compiler.git

   SSH:

   git clone git@github.com:BraSDon/basic-compiler.git

2. Change into project directory

   cd basic-compiler

3. Build the project

   cargo build --release

4. Compile and run one of the example programs; or create your own in examples/

   sh compile.sh parse-if

Language Grammar

program ::= {statement}  
statement ::= "PRINT" (expression | string) nl  
    | "IF" comparison "THEN" nl {statement} "ENDIF" nl  
    | "WHILE" comparison "REPEAT" nl {statement} "ENDWHILE" nl   
    | "LABEL" ident nl    
    | "GOTO" ident nl    
    | "LET" ident "=" expression nl    
    | "INPUT" ident nl    
comparison ::= expression (("==" | "!=" | ">" | ">=" | "<" | "<=") expression)+    
expression ::= term {( "-" | "+" ) term}    
term ::= unary {( "/" | "*" ) unary}    
unary ::= ["+" | "-"] primary    
primary ::= number | ident    
nl ::= '\n'+