Android Application for Lexical Analyzer

Project Title

Android Application for Lexical Analyzer

Project Area of Specialization Computer ScienceProject Summary

• Lexical analysis is the very first phase in the compiler design
• Lexemes and Tokens are the sequence of characters that are included in the source program according to the matching pattern of a token
• Lexical analyzer is implemented to scan the entire source code of the program
• Lexical analyzer helps to identify token into the symbol table
• A character sequence which is not possible to scan into any valid token is a lexical error
• Removes one character from the remaining input is useful Error recovery method
• Lexical Analyser scan the input program while parser perform syntax analysis
• It eases the process of lexical analysis and the syntax analysis by eliminating unwanted tokens
•  If the lexical analyzer finds a token invalid, it generates an error

Project Objectives

• The objective is to convert character streams into words and recognize its token type.
• Helps to identify token into the symbol table
• Removes white spaces and comments from the source program
• Correlates error messages with the source program
• Helps you to expands the macros if it is found in the source program
• Read input characters from the source program

Project Implementation Method

Its main task is to read the input characters and produce as output a sequence of tokens that the parser uses for syntax analysis. This interaction, summarized schematically.Upon receiving a “get next token “command from the parser, the lexical analyzer reads the input characters until it can identify next token.Sometimes, lexical analyzers are divided into a cascade of two phases, the first called “scanning”, and the second “lexical analysis”.The scanner is responsible for doing simple tasks, while the lexical analyzer proper does the more complex operations.The lexical analyzer which we have designed takes the input from an input file. It reads one character at a time from the input file, and continues to read until end of the file is reached. It recognizes the valid identifiers, keywords and specifies the token values of the keywords.It also identifies the header files, #define statements, numbers, special characters, various relational and logical operators, ignores the white spaces and comments. It prints the output in a separate file specifying the line number.

Benefits of the Project

• Easier and faster development.

• More efficient and compact.

• Very efficient and compact.

Technical Details of Final Deliverable

• Lex Tool
• A log of user stories (text file).
• Access to live source code.
• Running code (. APK file for Android and . IPA file for iOS).
• "Read me" file.
• Host server login credentials.

Final Deliverable of the Project Software SystemCore Industry ITOther IndustriesCore Technology OthersOther TechnologiesSustainable Development Goals Zero Hunger, Quality Education, Partnerships to achieve the GoalRequired Resources