Outline:

1. Language translation basics
2. Compilers and interpreters
3. An example language: Echo
4. Wrap-up
   • there are trade-offs between interpreters and compilers
   • most implementations use a hybrid approach anyway
   • want to learn more?
     • read Reflections on Trusting Trust, linked below
     • look up “quines” for fun and try to write one!

What’s next

Upcoming events/assessments:

• CS Bits and Bytes Thursday: Reflections on GitTogether
• Assignments 6–9 (all C assignments) cannot be resubmitted after Wednesday at 10pm
• Quiz 4 is not until after Midterm Break

What you should do now:

• Read the assigned readings (see below)
• Finish and submit Interpreter Part 1
  • handy gdb reference
• Work on resubmitting Assignments 6–9 with more complete functionality, style fixes, etc.

Reading assignment (to be completed by the next class):

Compilers and interpreters (from today) – stop reading at “History”:

• Compilers
• Interpreters

More from today: Hybrid approach in Python

Totally optional but one of Tanya’s favorites: Reflections on Trusting Trust

Grammars (for next time):

• Backus-Naur form
• Optional:
  • Scheme grammar
  • Python grammar
  • Kotlin grammar
  • Java grammar