use cargo_test_support::is_nightly;
use cargo_test_support::project;
#[cargo_test]
fn probe_cfg_before_crate_type_discovery() {
let p = project()
.file(
"Cargo.toml",
r#"
[package]
name = "foo"
version = "0.0.1"
authors = []
[target.'cfg(not(stage300))'.dependencies.noop]
path = "../noop"
"#,
)
.file(
"src/main.rs",
r#"
#[macro_use]
extern crate noop;
#[derive(Noop)]
struct X;
fn main() {}
"#,
)
.build();
let _noop = project()
.at("noop")
.file(
"Cargo.toml",
r#"
[package]
name = "noop"
version = "0.0.1"
authors = []
[lib]
proc-macro = true
"#,
)
.file(
"src/lib.rs",
r#"
extern crate proc_macro;
use proc_macro::TokenStream;
#[proc_macro_derive(Noop)]
pub fn noop(_input: TokenStream) -> TokenStream {
"".parse().unwrap()
}
"#,
)
.build();
p.cargo("build").run();
}
#[cargo_test]
fn noop() {
let p = project()
.file(
"Cargo.toml",
r#"
[package]
name = "foo"
version = "0.0.1"
authors = []
[dependencies.noop]
path = "../noop"
"#,
)
.file(
"src/main.rs",
r#"
#[macro_use]
extern crate noop;
#[derive(Noop)]
struct X;
fn main() {}
"#,
)
.build();
let _noop = project()
.at("noop")
.file(
"Cargo.toml",
r#"
[package]
name = "noop"
version = "0.0.1"
authors = []
[lib]
proc-macro = true
"#,
)
.file(
"src/lib.rs",
r#"
extern crate proc_macro;
use proc_macro::TokenStream;
#[proc_macro_derive(Noop)]
pub fn noop(_input: TokenStream) -> TokenStream {
"".parse().unwrap()
}
"#,
)
.build();
p.cargo("build").run();
p.cargo("build").run();
}
#[cargo_test]
fn impl_and_derive() {
let p = project()
.file(
"Cargo.toml",
r#"
[package]
name = "foo"
version = "0.0.1"
authors = []
[dependencies.transmogrify]
path = "../transmogrify"
"#,
)
.file(
"src/main.rs",
r#"
#[macro_use]
extern crate transmogrify;
trait ImplByTransmogrify {
fn impl_by_transmogrify(&self) -> bool;
}
#[derive(Transmogrify, Debug)]
struct X { success: bool }
fn main() {
let x = X::new();
assert!(x.impl_by_transmogrify());
println!("{:?}", x);
}
"#,
)
.build();
let _transmogrify = project()
.at("transmogrify")
.file(
"Cargo.toml",
r#"
[package]
name = "transmogrify"
version = "0.0.1"
authors = []
[lib]
proc-macro = true
"#,
)
.file(
"src/lib.rs",
r#"
extern crate proc_macro;
use proc_macro::TokenStream;
#[proc_macro_derive(Transmogrify)]
#[doc(hidden)]
pub fn transmogrify(input: TokenStream) -> TokenStream {
"
impl X {
fn new() -> Self {
X { success: true }
}
}
impl ImplByTransmogrify for X {
fn impl_by_transmogrify(&self) -> bool {
true
}
}
".parse().unwrap()
}
"#,
)
.build();
p.cargo("build").run();
p.cargo("run").with_stdout("X { success: true }").run();
}
#[cargo_test]
fn plugin_and_proc_macro() {
if !is_nightly() {
return;
}
let p = project()
.file(
"Cargo.toml",
r#"
[package]
name = "foo"
version = "0.0.1"
authors = []
[lib]
plugin = true
proc-macro = true
"#,
)
.file(
"src/lib.rs",
r#"
#![feature(plugin_registrar, rustc_private)]
#![feature(proc_macro, proc_macro_lib)]
extern crate rustc_driver;
use rustc_driver::plugin::Registry;
extern crate proc_macro;
use proc_macro::TokenStream;
#[plugin_registrar]
pub fn plugin_registrar(reg: &mut Registry) {}
#[proc_macro_derive(Questionable)]
pub fn questionable(input: TokenStream) -> TokenStream {
input
}
"#,
)
.build();
let msg = " `lib.plugin` and `lib.proc-macro` cannot both be `true`";
p.cargo("build")
.with_status(101)
.with_stderr_contains(msg)
.run();
}
#[cargo_test]
fn proc_macro_doctest() {
let foo = project()
.file(
"Cargo.toml",
r#"
[package]
name = "foo"
version = "0.1.0"
authors = []
[lib]
proc-macro = true
"#,
)
.file(
"src/lib.rs",
r#"
#![crate_type = "proc-macro"]
extern crate proc_macro;
use proc_macro::TokenStream;
/// ```
/// assert!(true);
/// ```
#[proc_macro_derive(Bar)]
pub fn derive(_input: TokenStream) -> TokenStream {
"".parse().unwrap()
}
#[test]
fn a() {
assert!(true);
}
"#,
)
.build();
foo.cargo("test")
.with_stdout_contains("test a ... ok")
.with_stdout_contains_n("test [..] ... ok", 2)
.run();
}
#[cargo_test]
fn proc_macro_crate_type() {
let foo = project()
.file(
"Cargo.toml",
r#"
[package]
name = "foo"
version = "0.1.0"
[dependencies]
pm = { path = "pm" }
"#,
)
.file(
"src/lib.rs",
r#"
//! ```
//! use foo::THING;
//! assert_eq!(THING, 123);
//! ```
#[macro_use]
extern crate pm;
#[derive(MkItem)]
pub struct S;
#[cfg(test)]
mod tests {
use super::THING;
#[test]
fn it_works() {
assert_eq!(THING, 123);
}
}
"#,
)
.file(
"pm/Cargo.toml",
r#"
[package]
name = "pm"
version = "0.1.0"
[lib]
crate-type = ["proc-macro"]
"#,
)
.file(
"pm/src/lib.rs",
r#"
extern crate proc_macro;
use proc_macro::TokenStream;
#[proc_macro_derive(MkItem)]
pub fn mk_item(_input: TokenStream) -> TokenStream {
"pub const THING: i32 = 123;".parse().unwrap()
}
"#,
)
.build();
foo.cargo("test")
.with_stdout_contains("test tests::it_works ... ok")
.with_stdout_contains_n("test [..] ... ok", 2)
.run();
}
#[cargo_test]
fn proc_macro_crate_type_warning() {
let foo = project()
.file(
"Cargo.toml",
r#"
[package]
name = "foo"
version = "0.1.0"
[lib]
crate-type = ["proc-macro"]
"#,
)
.file("src/lib.rs", "")
.build();
foo.cargo("build")
.with_stderr_contains(
"[WARNING] library `foo` should only specify `proc-macro = true` instead of setting `crate-type`")
.run();
}
#[cargo_test]
fn proc_macro_crate_type_warning_plugin() {
let foo = project()
.file(
"Cargo.toml",
r#"
[package]
name = "foo"
version = "0.1.0"
[lib]
crate-type = ["proc-macro"]
plugin = true
"#,
)
.file("src/lib.rs", "")
.build();
foo.cargo("build")
.with_stderr_contains(
"[WARNING] proc-macro library `foo` should not specify `plugin = true`")
.with_stderr_contains(
"[WARNING] library `foo` should only specify `proc-macro = true` instead of setting `crate-type`")
.run();
}
#[cargo_test]
fn proc_macro_crate_type_multiple() {
let foo = project()
.file(
"Cargo.toml",
r#"
[package]
name = "foo"
version = "0.1.0"
[lib]
crate-type = ["proc-macro", "rlib"]
"#,
)
.file("src/lib.rs", "")
.build();
foo.cargo("build")
.with_stderr(
"\
[ERROR] failed to parse manifest at `[..]/foo/Cargo.toml`
Caused by:
cannot mix `proc-macro` crate type with others
",
)
.with_status(101)
.run();
}
#[cargo_test]
fn proc_macro_extern_prelude() {
let p = project()
.file(
"Cargo.toml",
r#"
[package]
name = "foo"
version = "0.1.0"
edition = "2018"
[lib]
proc-macro = true
"#,
)
.file(
"src/lib.rs",
r#"
use proc_macro::TokenStream;
#[proc_macro]
pub fn foo(input: TokenStream) -> TokenStream {
"".parse().unwrap()
}
"#,
)
.build();
p.cargo("test").run();
p.cargo("doc").run();
}