Howdy,
I'm trying to establish a mental model for what the compiler does with
range functions in Go 1.23. It looks like the compiler creates a function
based on the for loop body, and calls it by looping over the values passed
in.
Meaning this code:
func simpleIter(yield func(v int) bool) {
if !yield(1) {
return
}
if !yield(2) {
return
}
}
for x := range simpleIter {
fmt.Println(x)
}
compiles into this code:
{
yield := func(v int) bool {
fmt.Println(v) // loop body from the code above
}
for v := 1; v <= 2; v++ {
if !yield(1) {
goto end_loop
}
}
end_loop:
}
Is that correct?
Thanks,
Justin
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