https://github.com/oguzhan-yilmaz/lexical-analyzer-for-psi-lang
A lexical analyzer for custom defined PSI Language, developed for Programming Languages Course.
https://github.com/oguzhan-yilmaz/lexical-analyzer-for-psi-lang
c lexical-analyzer
Last synced: 2 months ago
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A lexical analyzer for custom defined PSI Language, developed for Programming Languages Course.
- Host: GitHub
- URL: https://github.com/oguzhan-yilmaz/lexical-analyzer-for-psi-lang
- Owner: oguzhan-yilmaz
- License: mit
- Created: 2020-08-03T14:14:53.000Z (about 5 years ago)
- Default Branch: master
- Last Pushed: 2020-08-03T14:22:36.000Z (about 5 years ago)
- Last Synced: 2025-03-23T08:44:03.405Z (7 months ago)
- Topics: c, lexical-analyzer
- Language: C
- Homepage:
- Size: 4.88 KB
- Stars: 3
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# lexical-analyzer-for-psi-lang
A lexical analyzer for custom defined PSI Language, developed for Programming Languages Course.
## Objective
Creating the Lexical Analyzer phase of PSI++ Compiler in C. Analyzer should get the ‘.psi’ file and output the produced tokens to a ‘.lex’ file.
## Detailed Description of Token Handling
### Keywords
PSI++ Language has 18 different keywords. For this program’s consideration it has to be surrounded by whitespace, and match the predefined set of keywords. They are tokenized as ‘Keyword’
### Identifiers
Identifiers in PSI++ are arbitrarily named so it doesn’t have any predefined set but rules. Any identifier surrounded by whitespace or operators, which has a length less than 30 characters, starting with alphabetic characters and containing only alphanumeric characters and underscore is tokenized as ‘Identifier’ in Analyzer.
### String Constants
Any set of characters which are surrounded by double quote is tokenized as ‘StringConst’ in Analyzer.
### Integer Constants
Any sets of digit surrounded by whitespace which length is less than 10 is considered as ‘IntConst’ token.
### Operators
When the one of the operators in predefined set of operators found in source code of any PSI++ program, it is considered to be an operator and tokenized as ‘Operator’ by the Analyzer.
### End of Line
Semicolons are tokenized as ‘EndOfLine’.
### Brackets
Parenthesis, Curly Brackets and Square Brackets are tokenized by Analyzer with their respective names.
### Comments
This Analyzer ignores the comments which are denoted any text between ‘/*’ and ‘*/’. It doesn’t show up in the ‘.lex’ file.