Simple Compiler

A simple package for compiler practice

In two phases

1. Lexical analyzer
2. Syntax analyzer

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Lexical analyzer

Run

git clone https://github.com/amirsharifi74/my_compiler_exrecise.git

python3 lexical_analizer/scanner.py -i <input_file> -o <output_file>

Short_param	Long_param	description	default
-o	--output	path to input source code file	out.txt
-i	--input	path to outout source code file	test.pp

Syntax analyzer

Simple grammer to detect array of our custum language(my language name is amir) Give output of Lexical analizer(tokens) and get the syntax error in CMD the rest of the language grammer is similar to this

Grammer

type -> simple

|  id

| array [simple] of type

symple -> integer

| char

| num dotdot num

params

Short_param	Long_param	description	default
-i	--input	path to input tokens file	out.txt

Run

python3 syntax_analizer/parser.py -i <your_tokens_file_path>

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Impilimentation with antlr4

Antlr4 Github page

installation antlr4

getting start with antlr4

Dont forget to install pip install antlr4-python3-runtime

caution: for running my sample code you should generate code for python

cd antlr/
antlr4 -Dlanguage=Python3 Array.g4

Run antlr

First of all write your code in test.pp

cd antlr/
python3 ArrayDetector.py