Do not emit include_in_doc_without_cfg inside macros

Author: GuillaumeGomez

clippy_lints/src/doc/include_in_doc_without_cfg.rs

@@ -9,7 +9,8 @@ use super::DOC_INCLUDE_WITHOUT_CFG;
 
 pub fn check(cx: &LateContext<'_>, attrs: &[Attribute]) {
     for attr in attrs {
-        if let AttrKind::Normal(ref normal) = attr.kind
+        if !attr.span.from_expansion()
+            && let AttrKind::Normal(ref normal) = attr.kind
             && normal.item.path == sym::doc
             && let AttrArgs::Eq(_, AttrArgsEq::Hir(ref meta)) = normal.item.args
             && !attr.span.contains(meta.span)

tests/ui/doc/doc_include_without_cfg.fixed

@@ -8,6 +8,20 @@
 #![doc = "some doc"]
 //! more doc
 
+// Should not lint!
+macro_rules! tst {
+    ($(#[$attr:meta])*) => {
+        $(#[$attr])*
+        fn blue() {
+            println!("Hello, world!");
+        }
+    }
+}
+
+tst! {
+    /// This is a test with no included file
+}
+
 #[cfg_attr(doc, doc = include_str!("../approx_const.rs"))] //~ doc_include_without_cfg
 // Should not lint.
 #[cfg_attr(feature = "whatever", doc = include_str!("../approx_const.rs"))]

tests/ui/doc/doc_include_without_cfg.rs

@@ -8,6 +8,20 @@
 #![doc = "some doc"]
 //! more doc
 
+// Should not lint!
+macro_rules! tst {
+    ($(#[$attr:meta])*) => {
+        $(#[$attr])*
+        fn blue() {
+            println!("Hello, world!");
+        }
+    }
+}
+
+tst! {
+    /// This is a test with no included file
+}
+
 #[doc = include_str!("../approx_const.rs")] //~ doc_include_without_cfg
 // Should not lint.
 #[cfg_attr(feature = "whatever", doc = include_str!("../approx_const.rs"))]

tests/ui/doc/doc_include_without_cfg.stderr

@@ -8,7 +8,7 @@ LL | #![doc = include_str!("../approx_const.rs")]
    = help: to override `-D warnings` add `#[allow(clippy::doc_include_without_cfg)]`
 
 error: included a file in documentation unconditionally
-  --> tests/ui/doc/doc_include_without_cfg.rs:11:1
+  --> tests/ui/doc/doc_include_without_cfg.rs:25:1
    |
 LL | #[doc = include_str!("../approx_const.rs")]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `cfg_attr(doc, doc = "...")`: `#[cfg_attr(doc, doc = include_str!("../approx_const.rs"))]`