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| author | Cliff Click <cliffc@acm.org> | 2023-10-01 18:01:54 +0100 |
|---|---|---|
| committer | Cliff Click <cliffc@acm.org> | 2026-10-04 13:30:41 -0700 |
| commit | bafb37e0078950acdf0d0218a977beaf05e0b6ac (patch) | |
| tree | 03ca39c0f3b409b014a0f0659b65e5f3567af140 /docs/chapter03/03-grammar.md | |
| parent | c9ca49691ac9040eb0459ac6de6c2fe62a347a02 (diff) | |
| download | Simple-bafb37e0078950acdf0d0218a977beaf05e0b6ac.tar.gz Simple-bafb37e0078950acdf0d0218a977beaf05e0b6ac.zip | |
Chapter 3: Variable Declarations
Co-authored-by: Dibyendu Majumdar <mobile@majumdar.org.uk>
Co-authored-by: Yichen Yan <oraluben@outlook.com>
Co-authored-by: Thalia Archibald <thalia@archibald.dev>
Co-authored-by: Tamas Hadhazy <helsgithub15@gmail.com>
Co-authored-by: Hsiang-Ying Fu <66062782+fuhsnn@users.noreply.github.com>
Co-authored-by: XmiliaH <45106915+XmiliaH@users.noreply.github.com>
Co-authored-by: Tamás Hadházy <85063808+Hels15@users.noreply.github.com>
Co-authored-by: tannal <tannal2409@gmail.com>
Co-authored-by: hadha <helsgithub15@gmail.com>
Co-authored-by: godalming123 <68993177+godalming123@users.noreply.github.com>
Co-authored-by: RobertObkircher <robert.obkircher@gmail.com>
Diffstat (limited to 'docs/chapter03/03-grammar.md')
| -rw-r--r-- | docs/chapter03/03-grammar.md | 68 |
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diff --git a/docs/chapter03/03-grammar.md b/docs/chapter03/03-grammar.md new file mode 100644 index 00000000..1d36b532 --- /dev/null +++ b/docs/chapter03/03-grammar.md @@ -0,0 +1,68 @@ +# Grammar for Chapter 1 + +```antlrv4 +grammar SimpleLanguage; + +program + : statement+ EOF + ; + +statement + : returnStatement + | declStatement + | blockStatment + | expressionStatement + ; + + +expressionStatement + : IDENTIFIER '=' expression ';' + ; + +blockStatement + : '{' statement+ '}' + ; + +declStatement + : 'int' IDENTIFIER '=' expression ';' + ; + +returnStatement + : 'return' expression ';' + ; + +expression + : additiveExpression + ; + +additiveExpression + : multiplicativeExpression (('+' | '-') multiplicativeExpression)* + ; + +multiplicativeExpression + : unaryExpression (('*' | '/') unaryExpression)* + ; + +unaryExpression + : ('-') unaryExpression + | primaryExpression + ; + +primaryExpression + : IDENTIFIER + | INTEGER_LITERAL + | '(' expression ')' + ; + +INTEGER_LITERAL + : [1-9][0-9]* + | [0] + ; + +IDENTIFIER + : NON_DIGIT (NON_DIGIT | DIGIT)* + ; + +NON_DIGIT: [a-zA-Z_]; +DEC_DIGIT: [0-9]; +``` |