improve type mutation for certain structures

src/bootstrap/src/core/build_steps/check.rs

@@ -31,8 +31,13 @@ pub struct Std {
 }
 
 impl Std {
-    pub fn new_with_build_kind(target: TargetSelection, kind: Option<Kind>) -> Self {
-        Self { target, crates: vec![], override_build_kind: kind }
+    pub fn new(target: TargetSelection) -> Self {
+        Self { target, crates: vec![], override_build_kind: None }
+    }
+
+    pub fn build_kind(mut self, kind: Option<Kind>) -> Self {
+        self.override_build_kind = kind;
+        self
     }
 }
 
@@ -167,20 +172,17 @@ pub struct Rustc {
 
 impl Rustc {
     pub fn new(target: TargetSelection, builder: &Builder<'_>) -> Self {
-        Self::new_with_build_kind(target, builder, None)
-    }
-
-    pub fn new_with_build_kind(
-        target: TargetSelection,
-        builder: &Builder<'_>,
-        kind: Option<Kind>,
-    ) -> Self {
         let crates = builder
             .in_tree_crates("rustc-main", Some(target))
             .into_iter()
             .map(|krate| krate.name.to_string())
             .collect();
-        Self { target, crates, override_build_kind: kind }
+        Self { target, crates, override_build_kind: None }
+    }
+
+    pub fn build_kind(mut self, build_kind: Option<Kind>) -> Self {
+        self.override_build_kind = build_kind;
+        self
     }
 }
 
@@ -216,7 +218,7 @@ impl Step for Rustc {
             builder.ensure(crate::core::build_steps::compile::Std::new(compiler, compiler.host));
             builder.ensure(crate::core::build_steps::compile::Std::new(compiler, target));
         } else {
-            builder.ensure(Std::new_with_build_kind(target, self.override_build_kind));
+            builder.ensure(Std::new(target).build_kind(self.override_build_kind));
         }
 
         let mut cargo = builder::Cargo::new(

src/bootstrap/src/core/build_steps/clippy.rs

@@ -215,7 +215,7 @@ impl Step for Rustc {
             builder.ensure(compile::Std::new(compiler, compiler.host));
             builder.ensure(compile::Std::new(compiler, target));
         } else {
-            builder.ensure(check::Std::new_with_build_kind(target, Some(Kind::Check)));
+            builder.ensure(check::Std::new(target).build_kind(Some(Kind::Check)));
         }
 
         let mut cargo = builder::Cargo::new(
@@ -285,7 +285,7 @@ macro_rules! lint_any {
                 let compiler = builder.compiler(builder.top_stage, builder.config.build);
                 let target = self.target;
 
-                builder.ensure(check::Rustc::new_with_build_kind(target, builder, Some(Kind::Check)));
+                builder.ensure(check::Rustc::new(target, builder).build_kind(Some(Kind::Check)));
 
                 let cargo = prepare_tool_cargo(
                     builder,

src/bootstrap/src/core/build_steps/compile.rs

@@ -57,41 +57,20 @@ impl Std {
         }
     }
 
-    pub fn force_recompile(compiler: Compiler, target: TargetSelection) -> Self {
-        Self {
-            target,
-            compiler,
-            crates: Default::default(),
-            force_recompile: true,
-            extra_rust_args: &[],
-            is_for_mir_opt_tests: false,
-        }
+    pub fn force_recompile(mut self, force_recompile: bool) -> Self {
+        self.force_recompile = force_recompile;
+        self
     }
 
-    pub fn new_for_mir_opt_tests(compiler: Compiler, target: TargetSelection) -> Self {
-        Self {
-            target,
-            compiler,
-            crates: Default::default(),
-            force_recompile: false,
-            extra_rust_args: &[],
-            is_for_mir_opt_tests: true,
-        }
+    #[allow(clippy::wrong_self_convention)]
+    pub fn is_for_mir_opt_tests(mut self, is_for_mir_opt_tests: bool) -> Self {
+        self.is_for_mir_opt_tests = is_for_mir_opt_tests;
+        self
     }
 
-    pub fn new_with_extra_rust_args(
-        compiler: Compiler,
-        target: TargetSelection,
-        extra_rust_args: &'static [&'static str],
-    ) -> Self {
-        Self {
-            target,
-            compiler,
-            crates: Default::default(),
-            force_recompile: false,
-            extra_rust_args,
-            is_for_mir_opt_tests: false,
-        }
+    pub fn extra_rust_args(mut self, extra_rust_args: &'static [&'static str]) -> Self {
+        self.extra_rust_args = extra_rust_args;
+        self
     }
 
     fn copy_extra_objects(

src/bootstrap/src/core/build_steps/test.rs

@@ -1718,7 +1718,7 @@ NOTE: if you're sure you want to do this, please open an issue as to why. In the
 
         // ensure that `libproc_macro` is available on the host.
         if suite == "mir-opt" {
-            builder.ensure(compile::Std::new_for_mir_opt_tests(compiler, compiler.host));
+            builder.ensure(compile::Std::new(compiler, compiler.host).is_for_mir_opt_tests(true));
         } else {
             builder.ensure(compile::Std::new(compiler, compiler.host));
         }
@@ -1731,7 +1731,7 @@ NOTE: if you're sure you want to do this, please open an issue as to why. In the
         let mut cmd = builder.tool_cmd(Tool::Compiletest);
 
         if suite == "mir-opt" {
-            builder.ensure(compile::Std::new_for_mir_opt_tests(compiler, target));
+            builder.ensure(compile::Std::new(compiler, target).is_for_mir_opt_tests(true));
         } else {
             builder.ensure(compile::Std::new(compiler, target));
         }
@@ -2737,7 +2737,7 @@ impl Step for Crate {
 
         // Prepare sysroot
         // See [field@compile::Std::force_recompile].
-        builder.ensure(compile::Std::force_recompile(compiler, compiler.host));
+        builder.ensure(compile::Std::new(compiler, compiler.host).force_recompile(true));
 
         // If we're not doing a full bootstrap but we're testing a stage2
         // version of libstd, then what we're actually testing is the libstd
@@ -2781,7 +2781,7 @@ impl Step for Crate {
         } else {
             // Also prepare a sysroot for the target.
             if builder.config.build != target {
-                builder.ensure(compile::Std::force_recompile(compiler, target));
+                builder.ensure(compile::Std::new(compiler, target).force_recompile(true));
                 builder.ensure(RemoteCopyLibs { compiler, target });
             }
 
@@ -3557,10 +3557,10 @@ impl Step for CodegenGCC {
         let compiler = self.compiler;
         let target = self.target;
 
-        builder.ensure(compile::Std::new_with_extra_rust_args(compiler, target, &[
-            "-Csymbol-mangling-version=v0",
-            "-Cpanic=abort",
-        ]));
+        builder.ensure(
+            compile::Std::new(compiler, target)
+                .extra_rust_args(&["-Csymbol-mangling-version=v0", "-Cpanic=abort"]),
+        );
 
         // If we're not doing a full bootstrap but we're testing a stage2
         // version of libstd, then what we're actually testing is the libstd