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jgs Compilers Lecture 16: Parser III Dr. Javier Gonzalez-Sanchez [email protected]

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jgs Previously …

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Dr. Javier Gonzalez-Sanchez | Compilers | 3 jgs https://github.com/javiergs/TheParser/

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Dr. Javier Gonzalez-Sanchez | Compilers | 4 jgs Class Main | Next Step

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Dr. Javier Gonzalez-Sanchez | Compilers | 5 jgs Class Parser

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Dr. Javier Gonzalez-Sanchez | Compilers | 6 jgs Input

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Dr. Javier Gonzalez-Sanchez | Compilers | 7 jgs Rules { 0; 1 + 2; 3 * (4 + hello); }

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jgs Second Project GitHub Classroom and Initial Code

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Dr. Javier Gonzalez-Sanchez | Compilers | 9 jgs GitHub Classroom https://classroom.github.com/a/qKNbimKm

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Dr. Javier Gonzalez-Sanchez | Compilers | 10 jgs GitHub Classroom

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Dr. Javier Gonzalez-Sanchez | Compilers | 11 jgs GitHub Classroom | Test Cases

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Dr. Javier Gonzalez-Sanchez | Compilers | 12 jgs GitHub Classroom | input

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Dr. Javier Gonzalez-Sanchez | Compilers | 13 jgs GitHub Classroom | input

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Dr. Javier Gonzalez-Sanchez | Compilers | 14 jgs GitHub Classroom | input

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Dr. Javier Gonzalez-Sanchez | Compilers | 15 jgs GitHub Classroom | input

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Dr. Javier Gonzalez-Sanchez | Compilers | 16 jgs GitHub Classroom | input

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jgs Second Project Our Language

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Dr. Javier Gonzalez-Sanchez | Compilers | 18 jgs KEYWORD {class, return, print} STRING Language Actions Expressions (operators) Instructions Control Structures ARITHMETIC OPERATORS { +, -, *, /, =} LOGIC OPERATORS { &, |, ! } RELATIONAL OPERATORS {<, >, ==, !=, <=, >=} KEYWORD { if, else, do, while, for, switch, case } Data INTEGER FLOAT HEXADECIMAL CHAR KEYWORD { void, int, char, string, float, boolean } KEYWORD { true, false } BINARY Delimiter : ; , ( ) { } [ ] Our Language OCTAL IDENTIFIER

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Dr. Javier Gonzalez-Sanchez | Compilers | 19 jgs Our Grammar 1. PROGRAM

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Dr. Javier Gonzalez-Sanchez | Compilers | 20 jgs Our Grammar What about global variables? 1. PROGRAM

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Dr. Javier Gonzalez-Sanchez | Compilers | 21 jgs Our Grammar 2. METHODS 3. BODY

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Dr. Javier Gonzalez-Sanchez | Compilers | 22 jgs Our Grammar 4. TYPE

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Dr. Javier Gonzalez-Sanchez | Compilers | 23 jgs Our Grammar 5. PARAMS 6. ASSIGNMENT 7. EXPRESSION

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Dr. Javier Gonzalez-Sanchez | Compilers | 24 jgs Our Grammar 9. Y 10. R 8. X

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Dr. Javier Gonzalez-Sanchez | Compilers | 25 jgs Our Grammar 12. A 13. B 11. E

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Dr. Javier Gonzalez-Sanchez | Compilers | 26 jgs Our Grammar 14. C What about call a method and use the returned value?

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Dr. Javier Gonzalez-Sanchez | Compilers | 27 jgs Our Grammar 15. VARIABLE 16. WHILE 17. IF

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Dr. Javier Gonzalez-Sanchez | Compilers | 28 jgs Our Grammar 19, CALL_METHOD 20. PARAM_VALUES 18. RETURN

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Dr. Javier Gonzalez-Sanchez | Compilers | 29 jgs Our Grammar 22. FOR 23. SWITCH 21. DOWHILE

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Dr. Javier Gonzalez-Sanchez | Compilers | 30 jgs GitHub Classroom https://classroom.github.com/a/qKNbimKm

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Dr. Javier Gonzalez-Sanchez | Compilers | 31 jgs Questions

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jgs Compilers Javier Gonzalez-Sanchez, Ph.D. [email protected] Spring 2025 Copyright. These slides can only be used as study material for the Compilers course at Universidad Panamericana. They cannot be distributed or used for another purpose.