https://github.com/lunarwhite/cminus-lexer-parser

Build a simply lexer and parser for C minus (subset of C), using Java.
https://github.com/lunarwhite/cminus-lexer-parser

cminus compiler lexer parser

Last synced: about 16 hours ago
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Build a simply lexer and parser for C minus (subset of C), using Java.

• Host: GitHub
• URL: https://github.com/lunarwhite/cminus-lexer-parser
• Owner: lunarwhite
• License: mit
• Created: 2022-05-18T13:44:02.000Z (over 2 years ago)
• Default Branch: master
• Last Pushed: 2023-12-14T15:59:25.000Z (11 months ago)
• Last Synced: 2023-12-14T16:55:55.879Z (11 months ago)
• Topics: cminus, compiler, lexer, parser
• Language: Java
• Homepage:
• Size: 26.4 KB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# cminus-lexer-parser

Build a simply lexer and parser for C minus (subset of C), using Java.

Explore more details in this [blog post](https://lunarwhite.notion.site/Tiny-Lexer-and-Parser-for-CMinus-f5033869faa9425eab94cf8cf2539a92).

## Structure

- Lexer: 

  - Input a C source file to be syntactically analyzed, output the token sequence after the lexical analysis process, and return it with Java's built-in data structure ArrayList to provide a data source for subsequent lexical analysis.

- Parser: 

  - The token sequence obtained from the lexical analysis of a program in the previous experiment is input, and the move-in statute sequence from the LR(1) analysis in the bottom-up syntax analysis is output. 

  - The sequence also shows the contents of the stack and contains error handling and hints. The program can automatically construct an LR(1) analysis table by entering the grammar.

## Todo

- Performance improvement. Too many switch-cases, too many nested if-else.

- Complete unit tests to improve test coverage.

- Simply GUI to improve user ease of use.

## Reference

- [Let's Build a Compiler, by Jack Crenshaw](https://compilers.iecc.com/crenshaw/)

- [The LEMON Parser Generator](https://www.hwaci.com/sw/lemon/)