Rollup of 9 pull requests

src/bootstrap/dist.rs

@@ -914,6 +914,8 @@ pub fn extended(build: &Build, stage: u32, target: &str) {
         t!(fs::create_dir_all(pkg.join("cargo")));
         t!(fs::create_dir_all(pkg.join("rust-docs")));
         t!(fs::create_dir_all(pkg.join("rust-std")));
+        t!(fs::create_dir_all(pkg.join("rls")));
+        t!(fs::create_dir_all(pkg.join("rust-analysis")));
 
         cp_r(&work.join(&format!("{}-{}", pkgname(build, "rustc"), target)),
              &pkg.join("rustc"));
@@ -923,11 +925,17 @@ pub fn extended(build: &Build, stage: u32, target: &str) {
              &pkg.join("rust-docs"));
         cp_r(&work.join(&format!("{}-{}", pkgname(build, "rust-std"), target)),
              &pkg.join("rust-std"));
+        cp_r(&work.join(&format!("{}-{}", pkgname(build, "rls"), target)),
+             &pkg.join("rls"));
+        cp_r(&work.join(&format!("{}-{}", pkgname(build, "rust-analysis"), target)),
+             &pkg.join("rust-analysis"));
 
         install(&etc.join("pkg/postinstall"), &pkg.join("rustc"), 0o755);
         install(&etc.join("pkg/postinstall"), &pkg.join("cargo"), 0o755);
         install(&etc.join("pkg/postinstall"), &pkg.join("rust-docs"), 0o755);
         install(&etc.join("pkg/postinstall"), &pkg.join("rust-std"), 0o755);
+        install(&etc.join("pkg/postinstall"), &pkg.join("rls"), 0o755);
+        install(&etc.join("pkg/postinstall"), &pkg.join("rust-analysis"), 0o755);
 
         let pkgbuild = |component: &str| {
             let mut cmd = Command::new("pkgbuild");
@@ -941,6 +949,8 @@ pub fn extended(build: &Build, stage: u32, target: &str) {
         pkgbuild("cargo");
         pkgbuild("rust-docs");
         pkgbuild("rust-std");
+        pkgbuild("rls");
+        pkgbuild("rust-analysis");
 
         // create an 'uninstall' package
         install(&etc.join("pkg/postinstall"), &pkg.join("uninstall"), 0o755);
@@ -964,6 +974,8 @@ pub fn extended(build: &Build, stage: u32, target: &str) {
         let _ = fs::remove_dir_all(&exe);
         t!(fs::create_dir_all(exe.join("rustc")));
         t!(fs::create_dir_all(exe.join("cargo")));
+        t!(fs::create_dir_all(exe.join("rls")));
+        t!(fs::create_dir_all(exe.join("rust-analysis")));
         t!(fs::create_dir_all(exe.join("rust-docs")));
         t!(fs::create_dir_all(exe.join("rust-std")));
         cp_r(&work.join(&format!("{}-{}", pkgname(build, "rustc"), target))
@@ -978,11 +990,19 @@ pub fn extended(build: &Build, stage: u32, target: &str) {
         cp_r(&work.join(&format!("{}-{}", pkgname(build, "rust-std"), target))
                   .join(format!("rust-std-{}", target)),
              &exe.join("rust-std"));
+        cp_r(&work.join(&format!("{}-{}", pkgname(build, "rls"), target))
+                  .join("rls"),
+             &exe.join("rls"));
+        cp_r(&work.join(&format!("{}-{}", pkgname(build, "rust-analysis"), target))
+                  .join(format!("rust-analysis-{}", target)),
+             &exe.join("rust-analysis"));
 
         t!(fs::remove_file(exe.join("rustc/manifest.in")));
         t!(fs::remove_file(exe.join("cargo/manifest.in")));
         t!(fs::remove_file(exe.join("rust-docs/manifest.in")));
         t!(fs::remove_file(exe.join("rust-std/manifest.in")));
+        t!(fs::remove_file(exe.join("rls/manifest.in")));
+        t!(fs::remove_file(exe.join("rust-analysis/manifest.in")));
 
         if target.contains("windows-gnu") {
             t!(fs::create_dir_all(exe.join("rust-mingw")));
@@ -1056,6 +1076,26 @@ pub fn extended(build: &Build, stage: u32, target: &str) {
                         .arg("-dr").arg("Std")
                         .arg("-var").arg("var.StdDir")
                         .arg("-out").arg(exe.join("StdGroup.wxs")));
+        build.run(Command::new(&heat)
+                        .current_dir(&exe)
+                        .arg("dir")
+                        .arg("rls")
+                        .args(&heat_flags)
+                        .arg("-cg").arg("RlsGroup")
+                        .arg("-dr").arg("Rls")
+                        .arg("-var").arg("var.RlsDir")
+                        .arg("-out").arg(exe.join("RlsGroup.wxs"))
+                        .arg("-t").arg(etc.join("msi/remove-duplicates.xsl")));
+        build.run(Command::new(&heat)
+                        .current_dir(&exe)
+                        .arg("dir")
+                        .arg("rust-analysis")
+                        .args(&heat_flags)
+                        .arg("-cg").arg("AnalysisGroup")
+                        .arg("-dr").arg("Analysis")
+                        .arg("-var").arg("var.AnalysisDir")
+                        .arg("-out").arg(exe.join("AnalysisGroup.wxs"))
+                        .arg("-t").arg(etc.join("msi/remove-duplicates.xsl")));
         if target.contains("windows-gnu") {
             build.run(Command::new(&heat)
                             .current_dir(&exe)
@@ -1079,6 +1119,8 @@ pub fn extended(build: &Build, stage: u32, target: &str) {
                .arg("-dDocsDir=rust-docs")
                .arg("-dCargoDir=cargo")
                .arg("-dStdDir=rust-std")
+               .arg("-dRlsDir=rls")
+               .arg("-dAnalysisDir=rust-analysis")
                .arg("-arch").arg(&arch)
                .arg("-out").arg(&output)
                .arg(&input);
@@ -1096,6 +1138,8 @@ pub fn extended(build: &Build, stage: u32, target: &str) {
         candle("DocsGroup.wxs".as_ref());
         candle("CargoGroup.wxs".as_ref());
         candle("StdGroup.wxs".as_ref());
+        candle("RlsGroup.wxs".as_ref());
+        candle("AnalysisGroup.wxs".as_ref());
 
         if target.contains("windows-gnu") {
             candle("GccGroup.wxs".as_ref());
@@ -1118,6 +1162,8 @@ pub fn extended(build: &Build, stage: u32, target: &str) {
            .arg("DocsGroup.wixobj")
            .arg("CargoGroup.wixobj")
            .arg("StdGroup.wixobj")
+           .arg("RlsGroup.wixobj")
+           .arg("AnalysisGroup.wixobj")
            .current_dir(&exe);
 
         if target.contains("windows-gnu") {

src/doc/unstable-book/src/SUMMARY.md

@@ -208,6 +208,7 @@
     - [toowned_clone_into](library-features/toowned-clone-into.md)
     - [trusted_len](library-features/trusted-len.md)
     - [try_from](library-features/try-from.md)
+    - [try_trait](library-features/try-trait.md)
     - [unicode](library-features/unicode.md)
     - [unique](library-features/unique.md)
     - [unsize](library-features/unsize.md)

src/doc/unstable-book/src/library-features/question-mark-carrier.md

@@ -5,3 +5,9 @@ The tracking issue for this feature is: [#31436]
 [#31436]: https://github.com/rust-lang/rust/issues/31436
 
 ------------------------
+
+This feature has been superseded by [`try_trait`][try_trait].
+
+It exists only in stage0 for bootstrapping.
+
+[try_trait]: library-features/try-trait.html

src/doc/unstable-book/src/library-features/try-trait.md

@@ -0,0 +1,50 @@
+# `try_trait`
+
+The tracking issue for this feature is: [#42327]
+
+[#42327]: https://github.com/rust-lang/rust/issues/42327
+
+------------------------
+
+This introduces a new trait `Try` for extending the `?` operator to types
+other than `Result` (a part of [RFC 1859]).  The trait provides the canonical
+way to _view_ a type in terms of a success/failure dichotomy.  This will
+allow `?` to supplant the `try_opt!` macro on `Option` and the `try_ready!`
+macro on `Poll`, among other things.
+
+[RFC 1859]: https://github.com/rust-lang/rfcs/pull/1859
+
+Here's an example implementation of the trait:
+
+```rust,ignore
+/// A distinct type to represent the `None` value of an `Option`.
+///
+/// This enables using the `?` operator on `Option`; it's rarely useful alone.
+#[derive(Debug)]
+#[unstable(feature = "try_trait", issue = "42327")]
+pub struct None { _priv: () }
+
+#[unstable(feature = "try_trait", issue = "42327")]
+impl<T> ops::Try for Option<T>  {
+    type Ok = T;
+    type Error = None;
+
+    fn into_result(self) -> Result<T, None> {
+        self.ok_or(None { _priv: () })
+    }
+
+    fn from_ok(v: T) -> Self {
+        Some(v)
+    }
+
+    fn from_error(_: None) -> Self {
+        None
+    }
+}
+```
+
+Note the `Error` associated type here is a new marker.  The `?` operator
+allows interconversion between different `Try` implementers only when
+the error type can be converted `Into` the error type of the enclosing
+function (or catch block).  Having a distinct error type (as opposed to
+just `()`, or similar) restricts this to where it's semantically meaningful.

src/etc/installer/exe/rust.iss

@@ -46,6 +46,7 @@ Name: gcc; Description: "Linker and platform libraries"; Types: full
 Name: docs; Description: "HTML documentation"; Types: full
 Name: cargo; Description: "Cargo, the Rust package manager"; Types: full
 Name: std; Description: "The Rust Standard Library"; Types: full
+Name: rls; Description: "RLS, the Rust Language Server"
 
 [Files]
 Source: "rustc/*.*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs; Components: rust
@@ -55,6 +56,8 @@ Source: "rust-mingw/*.*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs;
 Source: "rust-docs/*.*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs; Components: docs
 Source: "cargo/*.*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs; Components: cargo
 Source: "rust-std/*.*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs; Components: std
+Source: "rls/*.*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs; Components: rls
+Source: "rust-analysis/*.*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs; Components: rls
 
 [Code]
 const

src/etc/installer/msi/rust.wxs

@@ -170,6 +170,8 @@
                     <Directory Id="Docs" Name="." />
                     <Directory Id="Cargo" Name="." />
                     <Directory Id="Std" Name="." />
+                    <Directory Id="Rls" Name="." />
+                    <Directory Id="Analysis" Name="." />
                 </Directory>
             </Directory>
 
@@ -273,6 +275,14 @@
                  <ComponentRef Id="PathEnvPerMachine" />
                  <ComponentRef Id="PathEnvPerUser" />
         </Feature>
+        <Feature Id="RLS"
+                 Title="RLS, the Rust Language Server"
+                 Display="7"
+                 Level="2"
+                 AllowAdvertise="no">
+                 <ComponentGroupRef Id="RlsGroup" />
+                 <ComponentGroupRef Id="AnalysisGroup" />
+        </Feature>
 
         <UIRef Id="RustUI" />
     </Product>

src/etc/installer/pkg/Distribution.xml

@@ -12,59 +12,70 @@
     </volume-check>
     <choices-outline>
       <line choice="install">
-	<line choice="rustc"/>
-    <line choice="rust-std"/>
-	<line choice="cargo"/>
-	<line choice="rust-docs"/>
+      <line choice="rustc"/>
+      <line choice="rust-std"/>
+      <line choice="cargo"/>
+      <line choice="rust-docs"/>
+      <line choice="rls"/>
       </line>
       <line choice="uninstall" />
     </choices-outline>
     <!--
-	These 'selected' scripts ensure that install and uninstall can never be selected at
-	the same time. Exectly how they work is pretty mysterious, tied to the unspecified algorithm
-	the installer uses to traverse the options after one is toggled.
+    These 'selected' scripts ensure that install and uninstall can never be selected at
+    the same time. Exectly how they work is pretty mysterious, tied to the unspecified algorithm
+    the installer uses to traverse the options after one is toggled.
       -->
     <choice id="install" visible="true"
-	    title="Install Rust" description="Install the Rust compiler, package manager and documentation."
-	    customLocation="/usr/local"
-	    selected="!choices.uninstall.selected"
-	    />
+        title="Install Rust" description="Install the Rust compiler, package manager and documentation."
+        customLocation="/usr/local"
+        selected="!choices.uninstall.selected"
+        />
     <choice id="uninstall" visible="true"
-	    title="Uninstall Rust" description="Select this option to uninstall an existing Rust installation."
-	    customLocation="/usr/local"
-	    selected="!(choices.install.selected || choices.rustc.selected || choices.cargo.selected || choices['rust-docs'].selected)"
-	    start_selected="false"
-	    >
-        <pkg-ref id="org.rust-lang.uninstall" />
+        title="Uninstall Rust" description="Select this option to uninstall an existing Rust installation."
+        customLocation="/usr/local"
+        selected="!(choices.install.selected || choices.rustc.selected || choices.cargo.selected || choices['rust-docs'].selected)"
+        start_selected="false"
+        >
+        <pkg-ref id="org.rust-lang.uninstall"/>
     </choice>
     <choice id="rustc" visible="true"
-	    title="Compiler" description="rustc, the Rust compiler, and rustdoc, the API documentation tool."
-	    selected="(!choices.uninstall.selected &amp;&amp; choices.rustc.selected) || (choices.uninstall.selected &amp;&amp; choices.install.selected)"
-	    >
+        title="Compiler" description="rustc, the Rust compiler, and rustdoc, the API documentation tool."
+        selected="(!choices.uninstall.selected &amp;&amp; choices.rustc.selected) || (choices.uninstall.selected &amp;&amp; choices.install.selected)"
+        >
         <pkg-ref id="org.rust-lang.rustc"/>
     </choice>
     <choice id="cargo" visible="true"
-	    title="Cargo" description="cargo, the Rust package manager."
-	    selected="(!choices.uninstall.selected &amp;&amp; choices.cargo.selected) || (choices.uninstall.selected &amp;&amp; choices.install.selected)"
-	    >
+        title="Cargo" description="cargo, the Rust package manager."
+        selected="(!choices.uninstall.selected &amp;&amp; choices.cargo.selected) || (choices.uninstall.selected &amp;&amp; choices.install.selected)"
+        >
         <pkg-ref id="org.rust-lang.cargo"/>
     </choice>
     <choice id="rust-std" visible="true"
-	    title="Standard Library" description="The Rust standard library."
-	    selected="(!choices.uninstall.selected &amp;&amp; choices['rust-std'].selected) || (choices.uninstall.selected &amp;&amp; choices.install.selected)"
-	    >
+        title="Standard Library" description="The Rust standard library."
+        selected="(!choices.uninstall.selected &amp;&amp; choices['rust-std'].selected) || (choices.uninstall.selected &amp;&amp; choices.install.selected)"
+        >
         <pkg-ref id="org.rust-lang.rust-std"/>
     </choice>
     <choice id="rust-docs" visible="true"
-	    title="Documentation" description="HTML documentation."
-	    selected="(!choices.uninstall.selected &amp;&amp; choices['rust-docs'].selected) || (choices.uninstall.selected &amp;&amp; choices.install.selected)"
-	    >
+        title="Documentation" description="HTML documentation."
+        selected="(!choices.uninstall.selected &amp;&amp; choices['rust-docs'].selected) || (choices.uninstall.selected &amp;&amp; choices.install.selected)"
+        >
         <pkg-ref id="org.rust-lang.rust-docs"/>
     </choice>
+    <choice id="rls" visible="true"
+        title="RLS" description="RLS, the Rust Language Server"
+        selected="(!choices.uninstall.selected &amp;&amp; choices['rls'].selected) || (choices.uninstall.selected &amp;&amp; choices.install.selected)"
+        start_selected="false"
+        >
+        <pkg-ref id="org.rust-lang.rls"/>
+        <pkg-ref id="org.rust-lang.rust-analysis"/>
+    </choice>
     <pkg-ref id="org.rust-lang.rustc" version="0" onConclusion="none">rustc.pkg</pkg-ref>
     <pkg-ref id="org.rust-lang.cargo" version="0" onConclusion="none">cargo.pkg</pkg-ref>
     <pkg-ref id="org.rust-lang.rust-docs" version="0" onConclusion="none">rust-docs.pkg</pkg-ref>
     <pkg-ref id="org.rust-lang.rust-std" version="0" onConclusion="none">rust-std.pkg</pkg-ref>
+    <pkg-ref id="org.rust-lang.rls" version="0" onConclusion="none">rls.pkg</pkg-ref>
+    <pkg-ref id="org.rust-lang.rust-analysis" version="0" onConclusion="none">rust-analysis.pkg</pkg-ref>
     <pkg-ref id="org.rust-lang.uninstall" version="0" onConclusion="none">uninstall.pkg</pkg-ref>
     <background file="rust-logo.png" mime-type="image/png"
                 alignment="bottomleft"/>