fix rule macro detection when macro expansion in macro name

1 files changed, 13 insertions, 0 deletions

diff --git a/src/makefile/token.rs b/src/makefile/token.rs
index dad4694..7b88823 100644
--- a/src/makefile/token.rs
+++ b/src/makefile/token.rs
@@ -155,6 +155,19 @@ impl TokenString {
             }
         })
     }
+
+    /// Returns (token index within string, pattern index within token).
+    pub fn find(&self, pattern: &str) -> Option<(usize, usize)> {
+        self.0
+            .iter()
+            .enumerate()
+            .find_map(|(token_index, token)| match token {
+                Token::Text(text) => text
+                    .find(pattern)
+                    .map(|pattern_index| (token_index, pattern_index)),
+                _ => None,
+            })
+    }
 }
 
 impl fmt::Display for TokenString {