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This repository was archived by the owner on Jan 19, 2023. It is now read-only.

Commit 72d0bae

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update the example
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‎README.md

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Original file line numberDiff line numberDiff line change
@@ -18,28 +18,40 @@ PS: you need to install [typer](https://pypi.org/project/typer/) to run the comp
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python compiler_cli.py path/to/file
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```
2020

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# Example rules
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# Simple example
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```py
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from scanner import Scanner, UnknownTokenError
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rules = [
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('IF_KW', r'if'),
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('ELSE_KW', r'else'),
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('FOR_KW', r'for'),
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('CONST_STR', r'".*?"|\'.*?\''),
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('CONST_NUMBER', r'\d+'),
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('PLUS_OP', r'\+'),
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('MINUS_OP', r'\-'),
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('MULTIPLY_OP', r'\*'),
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('DIVIDE_OP', r'\/'),
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('LP', r'\('),
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('LCB', r'\{'),
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('RP', r'\)'),
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('RCB', r'\}'),
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('EQUAL_OP', r'=='),
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('ASSIGNMENT_OP', r'='),
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('SEMICOLON', r';'),
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('IDENTIFIER', r'[a-zA-Z_]\w*'),
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]
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('IF_KW', r'if'),
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('ELSE_KW', r'else'),
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('FOR_KW', r'for'),
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('CONST_STR', r'".*?"|\'.*?\''),
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('CONST_NUMBER', r'\d+'),
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('PLUS_OP', r'\+'),
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('MINUS_OP', r'\-'),
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('MULTIPLY_OP', r'\*'),
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('DIVIDE_OP', r'\/'),
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('LP', r'\('),
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('LCB', r'\{'),
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('RP', r'\)'),
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('RCB', r'\}'),
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('EQUAL_OP', r'=='),
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('ASSIGNMENT_OP', r'='),
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('SEMICOLON', r';'),
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('IDENTIFIER', r'[a-zA-Z_]\w*'),
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]
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scanner = Scanner(rules, "i = 5 + 3;")
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try:
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for token in scanner.token_generator():
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print(token)
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except UnknownTokenError as error:
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print(error)
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```

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