defer func running timing

Lee Chou

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Jun 25, 2022, 4:41:11 PM6/25/22

to golang-nuts

Hello,

https://go.dev/play/p/J1tVplkIrjt

why o1.Ref print `2` but p1.Ref print `1` ?

why o1.Ref print `2` but o2.NonRef print `3` ? it's so confused.

Sean Liao

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Jun 25, 2022, 5:11:29 PM6/25/22

to golang-nuts

Maybe it's clearer if you look at what's happening like this https://go.dev/play/p/jAia9OPJfbY

The arguments to defer are evaluated immediately, but the execution only happens later

- sean

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Lee Chou

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Jun 26, 2022, 4:12:22 AM6/26/22

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Thanks for taking time. It's really big help. I understand what exactly happened.

best regards

- lee

Suresh Tupakula

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Jun 27, 2022, 1:03:59 AM6/27/22

to Lee Chou, golang-nuts

Hi Lee,

All the defer functions are pushed into stack. When unwinding the stack , the last function pushed comes out first and hence you see the execution order is reversed

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