Chapter 3 Discussion Pages 111 - 148.

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Presentation transcript:

Chapter 3 Discussion Pages 111 - 148

Binding times Work in small groups Don’t look at the text or your notes List as many binding times as you can recall For each time list what is usually bound at that time.

Allocation methods Work in small groups Don’t look at the text or your notes List as many allocation methods as you can recall For each method list a language and a feature from that language that uses that allocation method.

Scoping rules Work in small groups Don’t look at the text or your notes Write a definition of the word “scope”

Scope Consider the E3 program (global x 99) (fun f (y) (+ y x)) (global x 12) (global y (@ f 5)) (fun f (z) (* z 13)) (global z (@ f 5)) (global temp (pair 4 5)) What value is “z” if functions are statically scoped

Scope Consider the E3 program (global x 99) (fun f (y) (+ y x)) (global x 12) (global y (@ f 5)) (fun f (z) (* z 13)) (global z (@ f 5)) (global temp (pair 4 5)) What value is “z” if functions are dynamically scoped

Scope Consider the E3 program (global x 99) (fun f (y) (+ y x)) (global x 12) (global y (@ f 5)) (fun f (z) (* z 13)) (global z (@ f 5)) (global temp (pair 4 5)) What value is “y” if globals are statically scoped

Scope Consider the E3 program (global x 99) (fun f (y) (+ y x)) (global x 12) (global y (@ f 5)) (fun f (z) (* z 13)) (global z (@ f 5)) (global temp (pair 4 5)) What value is “y” if globals are dynamically scoped

Nested scopes Work in small groups Don’t look at the text or your notes Suggest a method to implement nested static scoping

Recursive bindings Work in small groups Don’t look at the text or your notes Why are recursive bindings problematic? Suggest two methods to solve the problem that you have read about.

Overloading Work in small groups Don’t look at the text or your notes What is overloading? How is it resolved?