Lecture Notes for February 13

Read for Today

• Sections 3.3 and 3.4.

Topics to Cover Today

• Deferred topics (to Chapter 8): detailed activation record, static links, frame/stack pointers, calling sequence, subroutine prologue/epilogue
• Scope rules
  • scope of a binding
  • referencing environment
• Static (lexical) scope
  • C: look at the blocks, nested scopes is okay (shadowing)
  • Pascal: C plus nested subroutines (static link, static chain)
  • Pascal/C/C++: forward declarations (declaration versus definition)
  • LISP/Scheme/Ruby: Pascal plus first class subroutines (closures)