error: macro undefined: 'postgres!'

[sfisol]

I had a working code that compiles with:
rustc 1.15.0-nightly (c80c31a50 2016-12-02)
Upgrading to:
rustc 1.16.0-nightly (df8debf6d 2017-01-25)

shows
error: macro undefined: 'postgres!'
on
5 | #[postgres(name = "panel_position")]
and
14 | #[postgres(name = "panel_value_type")]

Given code (starting at line 4):

#[derive(Debug, ToSql, FromSql, PartialEq, Clone, Copy)]
#[postgres(name = "panel_position")]
pub enum Position {
    #[postgres(name = "left")]
    Left,
    #[postgres(name = "right")]
    Right,
}

#[derive(Debug, ToSql, FromSql)]
#[postgres(name = "panel_value_type")]
pub enum PanelValueType {
    #[postgres(name = "link")]
    Link,
    #[postgres(name = "post")]
    Post,
    #[postgres(name = "category")]
    Category,
   (...)

Also version of rust-postgres changed from 0.13.3 to 0.13.5, I can provide version changes for rest of crates if it would be necessary

[sfackler]

Hmm, that's strange. You're using the 0.2 release, right?

[sfisol]

I'm using 0.2.2, I also tried downgrading postgres-derive and postgres-derive-internals to 0.2.0. It didn't help. In a few hours I'll try to provide the simplest possible example which renders the problem for me.

[sfackler]

Ah, I'm seeing the same thing.

[sfackler]

Ah, looks like rust-lang/rust#39347. Remove #![feature(proc_macro)] and it works.

[sfisol]

Thanks, it worked!

BTW. I believe in example in README.md, line
postgres-derive-macros = "0.2"
should be
postgres-derive = "0.2"

[sfackler]

Fixed!