/LPP-Compiler

Frontend of a compiler that can compile LPP programming Language.

Primary LanguageC++

LPP (front-end) Compiler

This proyect consists of a LPP compiler. Being able to run simple LPP programs like:

Entero x, _y, z

Inicio
    x <- 65
    _y <- 27
    z <- x + _y
    Escriba z
Fin

The example above would print 92 in the terminal.

Files Description

There are 4 main folders in this project:

  • fa: In this folder you will find the Finite Automaton used by the lexer to create the tokens. The files can be opened with JFLAP.

  • lexer: Source files for the lexer. In summary the lexer is a tremendous switch which goes letter by letter until it finds a token.

  • parser: LL(1) parser, using recursivity.

  • ast: From the parser, the ast is built. Here is were semantic errors are found. Unfortunately I didn't finish this part to handle arrays nor functions (help would be grateful).

How to run

Some prerequisites to the lexer are:

  1. A linux distro (preferable ubuntu)
  2. cmake (preferable v3.10.2)
  3. GNU Make (preferable v4.1)

Inside "lexer" and "ast" folders, there is a CMakeList file; which creates a Makefile, which will create the executable. I will assume you have a LPP file in the same folder of the source files.

/ast$ mkdir build
/ast$ cd build
/ast/build$ cmake ..
/ast/build$ make
/ast/build$ ./Lex ../boolTest.txt
VerdaderoFalso
/ast/build$

assuming boolTest.txt contains:

Booleano x

Inicio
    x <- Verdadero
    Escriba x
    x <- Falso
    Escriba x
Fin

Other comments

you could also add the executable writing down $ export LPP=<absolute route> in the console, the problem with this is that the variable will be deleted when the instance of the console is destroyed.

Hope you have fun! :octocat: