Lexical Analyzer Compiler - Pascal Language

This repository contains a lexical analyzer implemented in Python as part of an academic project for the Compilers course. The goal of this activity was to develop a simple compiler using only lexical analysis techniques, capable of processing a Pascal-like language.

📌 Project Objective

The main objective of this activity is to implement a lexical analyzer that processes a source code written in Pascal (stored in Programa_fonte.txt), identifying:

• Reserved keywords (e.g., program, var, begin, end)
• Assignment operators (:=)
• Identifiers (IDs)
• Type declarations (e.g., integer, real)
• Symbols (e.g., ;, :, =, +, (, ))

All tokens must be stored in a symbol table, and any lexical errors must be identified and reported individually, including but not limited to:

• Unrecognized identifiers
• Invalid keywords
• Misspelled reserved words
• Missing or unexpected symbols

The analyzer continues processing until all errors are found and reported clearly in the output.

🧪 Input Example

Sample input (from Programa_fonte.txt):

progra Soma;

var
  x,y,z: intege;
begi
  y=1;
  z=1;
  i=0;
  x:=y+z+i;
  writeln (x);
end.