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Improve Rustdoc's handling of procedural macros

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Fixes #58700
Fixes #58696
Fixes #49553
Fixes #52210

This commit removes the special rustdoc handling for proc macros, as we
can now
retrieve their span and attributes just like any other item.

A new command-line option is added to rustdoc: `--crate-type`. This
takes the same options as rustc's `--crate-type` option. However, all
values other than `proc-macro` are treated the same. This allows Rustdoc
to enable 'proc macro mode' when handling a proc macro crate.

In compiletest, a new 'rustdoc-flags' option is added. This allows us to
pass in the '--proc-macro-crate' flag in the absence of Cargo.

I've opened [an additional PR to
Cargo](https://github.com/rust-lang/cargo/pull/7159) to support passing
in this flag.
These two PRS can be merged in any order - the Cargo changes will not
take effect until the 'cargo' submodule is updated in this repository.
This commit is contained in:
Aaron Hill 2019-07-20 16:34:41 -04:00
parent 478464570e
commit 1498608135
No known key found for this signature in database
GPG Key ID: B4087E510E98B164
13 changed files with 95 additions and 56 deletions
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18
src/librustc/session/config.rs
View File

@ -1719,13 +1719,7 @@ pub fn rustc_short_optgroups() -> Vec<RustcOptGroup> {
static, framework, or dylib (the default).",
"[KIND=]NAME",
),
opt::multi_s(
"",
"crate-type",
"Comma separated list of types of crates
for the compiler to emit",
"[bin|lib|rlib|dylib|cdylib|staticlib|proc-macro]",
),
make_crate_type_option(),
opt::opt_s(
"",
"crate-name",
@ -2506,6 +2500,16 @@ pub fn build_session_options_and_crate_config(
)
}
pub fn make_crate_type_option() -> RustcOptGroup {
opt::multi_s(
"",
"crate-type",
"Comma separated list of types of crates
for the compiler to emit",
"[bin|lib|rlib|dylib|cdylib|staticlib|proc-macro]",
)
}
pub fn parse_crate_types_from_list(list_list: Vec<String>) -> Result<Vec<CrateType>, String> {
let mut crate_types: Vec<CrateType> = Vec::new();
for unparsed_crate_type in &list_list {

37
src/librustc_interface/passes.rs
View File

@ -473,27 +473,22 @@ fn configure_and_expand_inner<'a>(
ast_validation::check_crate(sess, &krate)
});
// If we're in rustdoc we're always compiling as an rlib, but that'll trip a
// bunch of checks in the `modify` function below. For now just skip this
// step entirely if we're rustdoc as it's not too useful anyway.
if !sess.opts.actually_rustdoc {
krate = time(sess, "maybe creating a macro crate", || {
let crate_types = sess.crate_types.borrow();
let num_crate_types = crate_types.len();
let is_proc_macro_crate = crate_types.contains(&config::CrateType::ProcMacro);
let is_test_crate = sess.opts.test;
syntax_ext::proc_macro_harness::inject(
&sess.parse_sess,
&mut resolver,
krate,
is_proc_macro_crate,
has_proc_macro_decls,
is_test_crate,
num_crate_types,
sess.diagnostic(),
)
});
}
krate = time(sess, "maybe creating a macro crate", || {
let crate_types = sess.crate_types.borrow();
let num_crate_types = crate_types.len();
let is_proc_macro_crate = crate_types.contains(&config::CrateType::ProcMacro);
let is_test_crate = sess.opts.test;
syntax_ext::proc_macro_harness::inject(
&sess.parse_sess,
&mut resolver,
krate,
is_proc_macro_crate,
has_proc_macro_decls,
is_test_crate,
num_crate_types,
sess.diagnostic(),
)
});
// Done with macro expansion!

18
src/librustdoc/clean/inline.rs
View File

@ -20,6 +20,7 @@ use crate::clean::{
self,
GetDefId,
ToSource,
TypeKind
};
use super::Clean;
@ -107,15 +108,16 @@ pub fn try_inline(
record_extern_fqn(cx, did, clean::TypeKind::Const);
clean::ConstantItem(build_const(cx, did))
}
// FIXME: proc-macros don't propagate attributes or spans across crates, so they look empty
Res::Def(DefKind::Macro(MacroKind::Bang), did) => {
Res::Def(DefKind::Macro(kind), did) => {
let mac = build_macro(cx, did, name);
if let clean::MacroItem(..) = mac {
record_extern_fqn(cx, did, clean::TypeKind::Macro);
mac
} else {
return None;
}
let type_kind = match kind {
MacroKind::Bang => TypeKind::Macro,
MacroKind::Attr => TypeKind::Attr,
MacroKind::Derive => TypeKind::Derive
};
record_extern_fqn(cx, did, type_kind);
mac
}
_ => return None,
};

14
src/librustdoc/config.rs
View File

@ -6,6 +6,7 @@ use errors;
use getopts;
use rustc::lint::Level;
use rustc::session;
use rustc::session::config::{CrateType, parse_crate_types_from_list};
use rustc::session::config::{CodegenOptions, DebuggingOptions, ErrorOutputType, Externs};
use rustc::session::config::{nightly_options, build_codegen_options, build_debugging_options,
get_cmd_lint_options, ExternEntry};
@ -32,6 +33,8 @@ pub struct Options {
pub input: PathBuf,
/// The name of the crate being documented.
pub crate_name: Option<String>,
/// Whether or not this is a proc-macro crate
pub proc_macro_crate: bool,
/// How to format errors and warnings.
pub error_format: ErrorOutputType,
/// Library search paths to hand to the compiler.
@ -111,6 +114,7 @@ impl fmt::Debug for Options {
f.debug_struct("Options")
.field("input", &self.input)
.field("crate_name", &self.crate_name)
.field("proc_macro_crate", &self.proc_macro_crate)
.field("error_format", &self.error_format)
.field("libs", &self.libs)
.field("externs", &FmtExterns(&self.externs))
@ -431,7 +435,16 @@ impl Options {
};
let manual_passes = matches.opt_strs("passes");
let crate_types = match parse_crate_types_from_list(matches.opt_strs("crate-type")) {
Ok(types) => types,
Err(e) =>{
diag.struct_err(&format!("unknown crate type: {}", e)).emit();
return Err(1);
}
};
let crate_name = matches.opt_str("crate-name");
let proc_macro_crate = crate_types.contains(&CrateType::ProcMacro);
let playground_url = matches.opt_str("playground-url");
let maybe_sysroot = matches.opt_str("sysroot").map(PathBuf::from);
let display_warnings = matches.opt_present("display-warnings");
@ -454,6 +467,7 @@ impl Options {
Ok(Options {
input,
crate_name,
proc_macro_crate,
error_format,
libs,
externs,

8
src/librustdoc/core.rs
View File

@ -228,6 +228,7 @@ pub fn run_core(options: RustdocOptions) -> (clean::Crate, RenderInfo, RenderOpt
let RustdocOptions {
input,
crate_name,
proc_macro_crate,
error_format,
libs,
externs,
@ -293,11 +294,16 @@ pub fn run_core(options: RustdocOptions) -> (clean::Crate, RenderInfo, RenderOpt
}).collect();
let host_triple = TargetTriple::from_triple(config::host_triple());
let crate_types = if proc_macro_crate {
vec![config::CrateType::ProcMacro]
} else {
vec![config::CrateType::Rlib]
};
// plays with error output here!
let sessopts = config::Options {
maybe_sysroot,
search_paths: libs,
crate_types: vec![config::CrateType::Rlib],
crate_types,
lint_opts: if !display_warnings {
lint_opts
} else {

3
src/librustdoc/lib.rs
View File

@ -46,7 +46,7 @@ use std::panic;
use std::process;
use rustc::session::{early_warn, early_error};
use rustc::session::config::{ErrorOutputType, RustcOptGroup};
use rustc::session::config::{ErrorOutputType, RustcOptGroup, make_crate_type_option};
#[macro_use]
mod externalfiles;
@ -132,6 +132,7 @@ fn opts() -> Vec<RustcOptGroup> {
stable("crate-name", |o| {
o.optopt("", "crate-name", "specify the name of this crate", "NAME")
}),
make_crate_type_option(),
stable("L", |o| {
o.optmulti("L", "library-path", "directory to add to crate search path",
"DIR")

8
src/librustdoc/test.rs
View File

@ -43,10 +43,16 @@ pub struct TestOptions {
pub fn run(options: Options) -> i32 {
let input = config::Input::File(options.input.clone());
let crate_types = if options.proc_macro_crate {
vec![config::CrateType::ProcMacro]
} else {
vec![config::CrateType::Dylib]
};
let sessopts = config::Options {
maybe_sysroot: options.maybe_sysroot.clone(),
search_paths: options.libs.clone(),
crate_types: vec![config::CrateType::Dylib],
crate_types,
cg: options.codegen_options.clone(),
externs: options.externs.clone(),
unstable_features: UnstableFeatures::from_environment(),

1
src/test/rustdoc-ui/failed-doctest-output.rs
View File

@ -3,6 +3,7 @@
// adapted to use that, and that normalize line can go away
// compile-flags:--test
// rustc-env:RUST_BACKTRACE=0
// normalize-stdout-test: "src/test/rustdoc-ui" -> "$$DIR"
// failure-status: 101

14
src/test/rustdoc-ui/failed-doctest-output.stdout
View File

@ -1,13 +1,13 @@
running 2 tests
test $DIR/failed-doctest-output.rs - OtherStruct (line 20) ... FAILED
test $DIR/failed-doctest-output.rs - SomeStruct (line 10) ... FAILED
test $DIR/failed-doctest-output.rs - OtherStruct (line 21) ... FAILED
test $DIR/failed-doctest-output.rs - SomeStruct (line 11) ... FAILED
failures:
---- $DIR/failed-doctest-output.rs - OtherStruct (line 20) stdout ----
---- $DIR/failed-doctest-output.rs - OtherStruct (line 21) stdout ----
error[E0425]: cannot find value `no` in this scope
--> $DIR/failed-doctest-output.rs:21:1
--> $DIR/failed-doctest-output.rs:22:1
|
3 | no
| ^^ not found in this scope
@ -16,7 +16,7 @@ error: aborting due to previous error
For more information about this error, try `rustc --explain E0425`.
Couldn't compile the test.
---- $DIR/failed-doctest-output.rs - SomeStruct (line 10) stdout ----
---- $DIR/failed-doctest-output.rs - SomeStruct (line 11) stdout ----
Test executable failed (exit code 101).
stdout:
@ -32,8 +32,8 @@ note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
failures:
$DIR/failed-doctest-output.rs - OtherStruct (line 20)
$DIR/failed-doctest-output.rs - SomeStruct (line 10)
$DIR/failed-doctest-output.rs - OtherStruct (line 21)
$DIR/failed-doctest-output.rs - SomeStruct (line 11)
test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out

7
src/test/rustdoc/inline_cross/auxiliary/proc_macro.rs
View File

@ -1,5 +1,6 @@
// force-host
// no-prefer-dynamic
// compile-flags: --crate-type proc-macro
#![crate_type="proc-macro"]
#![crate_name="some_macros"]
@ -25,3 +26,9 @@ pub fn some_proc_attr(_attr: TokenStream, item: TokenStream) -> TokenStream {
pub fn some_derive(_item: TokenStream) -> TokenStream {
TokenStream::new()
}
/// Doc comment from the original crate
#[proc_macro]
pub fn reexported_macro(_input: TokenStream) -> TokenStream {
TokenStream::new()
}

19
src/test/rustdoc/inline_cross/proc_macro.rs
View File

@ -1,16 +1,17 @@
// aux-build:proc_macro.rs
// build-aux-docs
// FIXME: if/when proc-macros start exporting their doc attributes across crates, we can turn on
// cross-crate inlining for them
extern crate some_macros;
// @has proc_macro/index.html
// @has - '//a/@href' '../some_macros/macro.some_proc_macro.html'
// @has - '//a/@href' '../some_macros/attr.some_proc_attr.html'
// @has - '//a/@href' '../some_macros/derive.SomeDerive.html'
// @!has proc_macro/macro.some_proc_macro.html
// @!has proc_macro/attr.some_proc_attr.html
// @!has proc_macro/derive.SomeDerive.html
// @has - '//a/@href' 'macro.some_proc_macro.html'
// @has - '//a/@href' 'attr.some_proc_attr.html'
// @has - '//a/@href' 'derive.SomeDerive.html'
// @has proc_macro/macro.some_proc_macro.html
// @has proc_macro/attr.some_proc_attr.html
// @has proc_macro/derive.SomeDerive.html
pub use some_macros::{some_proc_macro, some_proc_attr, SomeDerive};
// @has proc_macro/macro.reexported_macro.html
// @has - 'Doc comment from the original crate'
pub use some_macros::reexported_macro;

3
src/test/rustdoc/proc-macro.rs
View File

@ -1,5 +1,6 @@
// force-host
// no-prefer-dynamic
// compile-flags: --crate-type proc-macro --document-private-items
#![crate_type="proc-macro"]
#![crate_name="some_macros"]
@ -58,7 +59,7 @@ pub fn some_derive(_item: TokenStream) -> TokenStream {
}
// @has some_macros/foo/index.html
pub mod foo {
mod foo {
// @has - '//code' 'pub use some_proc_macro;'
// @has - '//a/@href' '../../some_macros/macro.some_proc_macro.html'
pub use some_proc_macro;

1
src/test/rustdoc/rustc-macro-crate.rs
View File

@ -1,5 +1,6 @@
// force-host
// no-prefer-dynamic
// compile-flags: --crate-type proc-macro
#![crate_type = "proc-macro"]