CiccioTecchio / Lexer

Java implementation of a Lexer described in "Principles of Compiler Design"

Lexer

This is a Java implementation of a Lexer explained in the book Principles of Compiler Design written by Alfred Aho and Jeffrey D. Ullman.
What I will go to implement are the transaction diagram to recognize the relationship operations, identificators, numbers, separator and blank spaces.

Relop diagram

---

Identificator diagram

---

Number diagram

---

Separator diagram

---

The separator are the symbol:

• {} [] ()
• , ; .

Blank space diagram

---

The blanck spaces are recognized but not returned.
They are:

• empty space character
• new line character
• tabulation character

How to run

You can import this project in Eclipse and run it normally.

• lang.txt: contains your language
• keywords.txt: contains your keywords