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Thursday, September 17 • 10:30 - 11:30
Neighborhoods Banding Together: Reasoning Globally about Programs

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Our most detailed reasoning about programs is done locally: we consider a neighborhood of a program — usually a single function and the interfaces surrounding it — and reason about its behavior without reference to the remainder of the program. But this reasoning is in service of a larger goal: we want to ensure that the entire program behaves correctly.

In this talk, I will take local reasoning for granted, and look at the process of joining neighborhoods of local reasoning together, and the global reasoning that ensures they form a coherent whole. I will show how we can prevent incoherent joining, and prevent the emergence of unbounded non-local recursion as the program is linked together.

This talk builds upon the discussion of local reasoning in last year's talk "The Truth of a Procedure,” but is intended to be understandable independently.

avatar for Lisa Lippincott

Lisa Lippincott

Software Architect, Tanium
Lisa Lippincott designed the software architectures of Tanium and BigFix, two systems for managing large fleets of computers. She's also a language nerd, and has contributed to arcane parts of the C++ standard. In her spare time, she studies mathematical logic, and wants to make computer-checked... Read More →

Thursday September 17, 2020 10:30 - 11:30 MDT