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Translate "let static 2 = argument 1" to VM code.

VM code (the answer):

push argument 1

pop static 2

My question

Aren't we forgetting let. Shouldn't we push another argument 1 to the stack, and then pop it to local 2 too? In order to preserve the "local type".

https://www.coursera.org/learn/nand2tetris2/lecture/z1wbL/unit-1-3-vm-abstraction-memory-segments enter image description here

Community
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xing Zì
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2 Answers2

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Not sure why you want to pop too local 2. In jack a let statement can be for field varibles too and does not have to necessarily be for local variables.

Push argument 1 would put the value in index 1 in argument segment on top of the stack which is 12.

Then you pop the top value from the stack into static 2 which is highligted in your picture

realWallawalla
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The keyword let in the pseudocode statement let x=y indicates to the reader that a name/value binding is about to occur, but let itself is not a variable.

You could read it as imagine x=y or assume x=y instead of let x=y if you prefer.

Alex Shroyer
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