GnoVM: Constant expressions do not work with some built-in functions

[omarsy]

Description

In Go, the following code snippet compiles and runs correctly, using the built-in min/ max function within a constant expression:

package main

func main() {
	const t = min(0, 1)
	println(t)
}

However, when using the same code in Gno, it returns an error:

name min not defined in fileset with files 

Expected Behavior

The code should compile successfully in Gno, similar to how it works in Go, allowing the use of built-in functions in constant expressions.

[leohhhn]

As far as I can see, min & max were introduced in Go 1.21; Gno is based on 1.17, so this is not supported yet. Will keep the issue open for visibility.

[thehowl]

if you find this is the case for other constant expressions (like len([2]int{1, 2}), which should yield the constant-expr 2), then please open another issue.

as leon said, min/max are not supported yet, we'll need generics #1748 before that

[omarsy]

maybe we should return the right error for that "name min/max not declared"

[thehowl]

yeah, you're welcome to adapt the error message, i agree it's unclear.