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UP Lecture 16
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Javier Gonzalez-Sanchez
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December 19, 2023
Programming
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170
UP Lecture 16
Compilers
Parser III
(202503)
Javier Gonzalez-Sanchez
PRO
December 19, 2023
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Transcript
jgs Compilers Lecture 16: Parser III Dr. Javier Gonzalez-Sanchez jgonzalezs@up.edu.mx
jgs Previously …
Dr. Javier Gonzalez-Sanchez | Compilers | 3 jgs https://github.com/javiergs/TheParser/
Dr. Javier Gonzalez-Sanchez | Compilers | 4 jgs Class Main
| Next Step
Dr. Javier Gonzalez-Sanchez | Compilers | 5 jgs Class Parser
Dr. Javier Gonzalez-Sanchez | Compilers | 6 jgs Input
Dr. Javier Gonzalez-Sanchez | Compilers | 7 jgs Rules {
0; 1 + 2; 3 * (4 + hello); }
jgs Second Project GitHub Classroom and Initial Code
Dr. Javier Gonzalez-Sanchez | Compilers | 9 jgs GitHub Classroom
https://classroom.github.com/a/qKNbimKm
Dr. Javier Gonzalez-Sanchez | Compilers | 10 jgs GitHub Classroom
Dr. Javier Gonzalez-Sanchez | Compilers | 11 jgs GitHub Classroom
| Test Cases
Dr. Javier Gonzalez-Sanchez | Compilers | 12 jgs GitHub Classroom
| input
Dr. Javier Gonzalez-Sanchez | Compilers | 13 jgs GitHub Classroom
| input
Dr. Javier Gonzalez-Sanchez | Compilers | 14 jgs GitHub Classroom
| input
Dr. Javier Gonzalez-Sanchez | Compilers | 15 jgs GitHub Classroom
| input
Dr. Javier Gonzalez-Sanchez | Compilers | 16 jgs GitHub Classroom
| input
jgs Second Project Our Language
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
Dr. Javier Gonzalez-Sanchez | Compilers | 19 jgs Our Grammar
1. PROGRAM
Dr. Javier Gonzalez-Sanchez | Compilers | 20 jgs Our Grammar
What about global variables? 1. PROGRAM
Dr. Javier Gonzalez-Sanchez | Compilers | 21 jgs Our Grammar
2. METHODS 3. BODY
Dr. Javier Gonzalez-Sanchez | Compilers | 22 jgs Our Grammar
4. TYPE
Dr. Javier Gonzalez-Sanchez | Compilers | 23 jgs Our Grammar
5. PARAMS 6. ASSIGNMENT 7. EXPRESSION
Dr. Javier Gonzalez-Sanchez | Compilers | 24 jgs Our Grammar
9. Y 10. R 8. X
Dr. Javier Gonzalez-Sanchez | Compilers | 25 jgs Our Grammar
12. A 13. B 11. E
Dr. Javier Gonzalez-Sanchez | Compilers | 26 jgs Our Grammar
14. C What about call a method and use the returned value?
Dr. Javier Gonzalez-Sanchez | Compilers | 27 jgs Our Grammar
15. VARIABLE 16. WHILE 17. IF
Dr. Javier Gonzalez-Sanchez | Compilers | 28 jgs Our Grammar
19, CALL_METHOD 20. PARAM_VALUES 18. RETURN
Dr. Javier Gonzalez-Sanchez | Compilers | 29 jgs Our Grammar
22. FOR 23. SWITCH 21. DOWHILE
Dr. Javier Gonzalez-Sanchez | Compilers | 30 jgs GitHub Classroom
https://classroom.github.com/a/qKNbimKm
Dr. Javier Gonzalez-Sanchez | Compilers | 31 jgs Questions
jgs Compilers Javier Gonzalez-Sanchez, Ph.D. jgonzalezs@up.edu.mx 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.