cgen error for enum field with expression involving a constant

[spytheman]

V doctor:

V full version: V 0.4.6 c689f80.605c43d
OS: linux, Ubuntu 20.04.6 LTS
Processor: 2 cpus, 64bit, little endian, Intel(R) Core(TM) i3-3225 CPU @ 3.30GHz

getwd: /space/v/oo
vexe: /space/v/oo/v
vexe mtime: 2024-07-01 09:39:23

vroot: OK, value: /space/v/oo
VMODULES: OK, value: /home/delian/.vmodules
VTMP: OK, value: /tmp/v_1000

Git version: git version 2.43.2
Git vroot status: weekly.2024.26-21-g605c43df
.git/config present: true

CC version: cc (Ubuntu 10.5.0-1ubuntu1~20.04) 10.5.0
thirdparty/tcc status: thirdparty-linux-amd64 40e5cbb5

What did you do?
v -g -o vdbg cmd/v && vdbg a.v

const base = 600000

enum Abc {
	aa
	bb = base
	cc
	dd = base + 10
}

// assert int(Abc.dd) == 600010

What did you expect to see?

a compiled program

What did you see instead?

==================
/tmp/v_1000/a.01J1PTKV5BXQQ8PM29Q1HFZJAV.tmp.c:842: error: '_const_main__base' undeclared
...
==================
(Use `v -cg` to print the entire error message)

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[spytheman]

The generated code had this on line 842:

    main__Abc__dd = (int_literal)(_const_main__base + 10), // (int_literal)(_const_main__base + 10)

while the define for the _const_main__base was later on line 1987:

#define _const_main__base 600000

[spytheman]

bb = base leads to main__Abc__bb = 600000, which is also fine, i.e. another potential resolution, beside reordering, is evaluating the base + 10 expression immediately in the checker/transformer, and generating main__Abc__bb = 600010 directly.

[JalonSolov]

I'd vote transformer. Checker should only check - transformer should do changes.