syntax_ext: proc_macro_decls -> proc_macro_harness

Few other minor renamings for consistency.
Remove one unused dependency from `rustc_passes`.
Fix libsyntax tests.
Fix rebase.

Author: petrochenkov

Cargo.lock

@@ -2751,20 +2751,6 @@ dependencies = [
  "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "rustc_allocator"
-version = "0.0.0"
-dependencies = [
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc 0.0.0",
- "rustc_data_structures 0.0.0",
- "rustc_errors 0.0.0",
- "rustc_target 0.0.0",
- "smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "syntax 0.0.0",
- "syntax_pos 0.0.0",
-]
-
 [[package]]
 name = "rustc_apfloat"
 version = "0.0.0"
@@ -2822,7 +2808,6 @@ dependencies = [
  "num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc 0.0.0",
- "rustc_allocator 0.0.0",
  "rustc_apfloat 0.0.0",
  "rustc_codegen_utils 0.0.0",
  "rustc_data_structures 0.0.0",
@@ -2935,7 +2920,6 @@ dependencies = [
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc 0.0.0",
  "rustc-rayon 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_allocator 0.0.0",
  "rustc_ast_borrowck 0.0.0",
  "rustc_codegen_ssa 0.0.0",
  "rustc_codegen_utils 0.0.0",
@@ -3060,7 +3044,6 @@ dependencies = [
  "rustc 0.0.0",
  "rustc_data_structures 0.0.0",
  "rustc_errors 0.0.0",
- "rustc_mir 0.0.0",
  "syntax 0.0.0",
  "syntax_pos 0.0.0",
 ]

src/librustc_interface/passes.rs

@@ -457,7 +457,7 @@ fn configure_and_expand_inner<'a>(
     sess.profiler(|p| p.end_activity("macro expansion"));
 
     time(sess, "maybe building test harness", || {
-        syntax_ext::test_harness::modify_for_testing(
+        syntax_ext::test_harness::inject(
             &sess.parse_sess,
             &mut resolver,
             sess.opts.test,
@@ -486,7 +486,7 @@ fn configure_and_expand_inner<'a>(
             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_decls::modify(
+            syntax_ext::proc_macro_harness::inject(
                 &sess.parse_sess,
                 &mut resolver,
                 krate,

src/librustc_passes/Cargo.toml

@@ -11,7 +11,6 @@ path = "lib.rs"
 [dependencies]
 log = "0.4"
 rustc = { path = "../librustc" }
-rustc_mir = { path = "../librustc_mir"}
 rustc_data_structures = { path = "../librustc_data_structures" }
 syntax = { path = "../libsyntax" }
 syntax_pos = { path = "../libsyntax_pos" }

src/libsyntax/ext/proc_macro.rs

@@ -231,7 +231,7 @@ crate fn add_derived_markers<T: HasAttrs>(
         names.insert(unwrap_or!(path.segments.get(0), continue).ident.name);
     }
 
-    let span = span.fresh_expansion(cx.current_expansion.mark, ExpnInfo::allow_unstable(
+    let span = span.fresh_expansion(cx.current_expansion.id, ExpnInfo::allow_unstable(
         ExpnKind::Macro(MacroKind::Derive, Symbol::intern(&pretty_name)), span,
         cx.parse_sess.edition, cx.allow_derive_markers.clone(),
     ));

src/libsyntax/parse/lexer/mod.rs

@@ -1365,7 +1365,7 @@ mod tests {
     use std::path::PathBuf;
     use syntax_pos::{BytePos, Span, NO_EXPANSION, edition::Edition};
     use rustc_data_structures::fx::{FxHashSet, FxHashMap};
-    use rustc_data_structures::sync::Lock;
+    use rustc_data_structures::sync::{Lock, Once};
 
     fn mk_sess(sm: Lrc<SourceMap>) -> ParseSess {
         let emitter = errors::emitter::EmitterWriter::new(Box::new(io::sink()),
@@ -1388,6 +1388,7 @@ mod tests {
             param_attr_spans: Lock::new(Vec::new()),
             let_chains_spans: Lock::new(Vec::new()),
             async_closure_spans: Lock::new(Vec::new()),
+            injected_crate_name: Once::new(),
         }
     }
 

src/libsyntax_ext/lib.rs

@@ -1,4 +1,5 @@
-//! Syntax extensions in the Rust compiler.
+//! This crate contains implementations of built-in macros and other code generating facilities
+//! injecting code into the crate before it is lowered to HIR.
 
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
 
@@ -31,7 +32,7 @@ mod test;
 mod trace_macros;
 
 pub mod global_allocator;
-pub mod proc_macro_decls;
+pub mod proc_macro_harness;
 pub mod standard_library_imports;
 pub mod test_harness;
 

src/libsyntax_ext/proc_macro_decls.rs src/libsyntax_ext/proc_macro_harness.rs

@@ -40,7 +40,7 @@ struct CollectProcMacros<'a> {
     is_test_crate: bool,
 }
 
-pub fn modify(sess: &ParseSess,
+pub fn inject(sess: &ParseSess,
               resolver: &mut dyn (::syntax::ext::base::Resolver),
               mut krate: ast::Crate,
               is_proc_macro_crate: bool,

src/libsyntax_ext/test.rs

@@ -26,7 +26,7 @@ pub fn expand_test_case(
 ) -> Vec<Annotatable> {
     if !ecx.ecfg.should_test { return vec![]; }
 
-    let sp = attr_sp.with_ctxt(SyntaxContext::empty().apply_mark(ecx.current_expansion.mark));
+    let sp = attr_sp.with_ctxt(SyntaxContext::empty().apply_mark(ecx.current_expansion.id));
     let mut item = anno_item.expect_item();
     item = item.map(|mut item| {
         item.vis = respan(item.vis.span, ast::VisibilityKind::Public);

src/libsyntax_ext/test_harness.rs

@@ -37,12 +37,14 @@ struct TestCtxt<'a> {
 
 // Traverse the crate, collecting all the test functions, eliding any
 // existing main functions, and synthesizing a main test harness
-pub fn modify_for_testing(sess: &ParseSess,
-                          resolver: &mut dyn Resolver,
-                          should_test: bool,
-                          krate: &mut ast::Crate,
-                          span_diagnostic: &errors::Handler,
-                          features: &Features) {
+pub fn inject(
+    sess: &ParseSess,
+    resolver: &mut dyn Resolver,
+    should_test: bool,
+    krate: &mut ast::Crate,
+    span_diagnostic: &errors::Handler,
+    features: &Features,
+) {
     // Check for #[reexport_test_harness_main = "some_name"] which
     // creates a `use __test::main as some_name;`. This needs to be
     // unconditional, so that the attribute is still marked as used in