Auto merge of #4269 - lzutao:rustup, r=flip1995

Rustup `macro expansion and resolution`

Rustup https://github.com/rust-lang/rust/pull/62476

changelog: none

clippy_lints/src/misc.rs

@@ -7,7 +7,7 @@ use rustc::ty;
 use rustc::{declare_lint_pass, declare_tool_lint};
 use rustc_errors::Applicability;
 use syntax::ast::LitKind;
-use syntax::source_map::{ExpnFormat, Span};
+use syntax::source_map::{ExpnKind, Span};
 
 use crate::consts::{constant, Constant};
 use crate::utils::sugg::Sugg;
@@ -596,10 +596,14 @@ fn is_used(cx: &LateContext<'_, '_>, expr: &Expr) -> bool {
 /// Tests whether an expression is in a macro expansion (e.g., something
 /// generated by `#[derive(...)]` or the like).
 fn in_attributes_expansion(expr: &Expr) -> bool {
-    expr.span
+    use syntax::ext::hygiene::MacroKind;
-        .ctxt()
+    expr.span.ctxt().outer_expn_info().map_or(false, |info| {
-        .outer_expn_info()
+        if let ExpnKind::Macro(MacroKind::Attr, _) = info.kind {
-        .map_or(false, |info| matches!(info.format, ExpnFormat::MacroAttribute(_)))
+            true
+        } else {
+            false
+        }
+    })
 }
 
 /// Tests whether `res` is a variable defined outside a macro.

clippy_lints/src/returns.rs

@@ -317,7 +317,7 @@ fn attr_is_cfg(attr: &ast::Attribute) -> bool {
 
 // get the def site
 fn get_def(span: Span) -> Option<Span> {
-    span.ctxt().outer_expn_info().and_then(|info| info.def_site)
+    span.ctxt().outer_expn_info().and_then(|info| Some(info.def_site))
 }
 
 // is this expr a `()` unit?

clippy_lints/src/types.rs

@@ -621,9 +621,9 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnitArg {
 }
 
 fn is_questionmark_desugar_marked_call(expr: &Expr) -> bool {
-    use syntax_pos::hygiene::CompilerDesugaringKind;
+    use syntax_pos::hygiene::DesugaringKind;
     if let ExprKind::Call(ref callee, _) = expr.node {
-        callee.span.is_compiler_desugaring(CompilerDesugaringKind::QuestionMark)
+        callee.span.is_desugaring(DesugaringKind::QuestionMark)
     } else {
         false
     }

clippy_lints/src/utils/mod.rs

@@ -43,7 +43,7 @@ use rustc_errors::Applicability;
 use smallvec::SmallVec;
 use syntax::ast::{self, LitKind};
 use syntax::attr;
-use syntax::ext::hygiene::ExpnFormat;
+use syntax::ext::hygiene::ExpnKind;
 use syntax::source_map::{Span, DUMMY_SP};
 use syntax::symbol::{kw, Symbol};
 
@@ -100,7 +100,7 @@ pub fn in_macro_or_desugar(span: Span) -> bool {
 /// Returns `true` if this `expn_info` was expanded by any macro.
 pub fn in_macro(span: Span) -> bool {
     if let Some(info) = span.ctxt().outer_expn_info() {
-        if let ExpnFormat::CompilerDesugaring(..) = info.format {
+        if let ExpnKind::Desugaring(..) = info.kind {
             false
         } else {
             true
@@ -686,7 +686,7 @@ pub fn is_adjusted(cx: &LateContext<'_, '_>, e: &Expr) -> bool {
 /// See also `is_direct_expn_of`.
 pub fn is_expn_of(mut span: Span, name: &str) -> Option<Span> {
     loop {
-        let span_name_span = span.ctxt().outer_expn_info().map(|ei| (ei.format.name(), ei.call_site));
+        let span_name_span = span.ctxt().outer_expn_info().map(|ei| (ei.kind.descr(), ei.call_site));
 
         match span_name_span {
             Some((mac_name, new_span)) if mac_name.as_str() == name => return Some(new_span),
@@ -706,7 +706,7 @@ pub fn is_expn_of(mut span: Span, name: &str) -> Option<Span> {
 /// `bar!` by
 /// `is_direct_expn_of`.
 pub fn is_direct_expn_of(span: Span, name: &str) -> Option<Span> {
-    let span_name_span = span.ctxt().outer_expn_info().map(|ei| (ei.format.name(), ei.call_site));
+    let span_name_span = span.ctxt().outer_expn_info().map(|ei| (ei.kind.descr(), ei.call_site));
 
     match span_name_span {
         Some((mac_name, new_span)) if mac_name.as_str() == name => Some(new_span),