From f7b8de180cc8db854ceba3f1644e9d7387d74ae3 Mon Sep 17 00:00:00 2001
From: Melody Horn <melody@boringcactus.com>
Date: Mon, 5 Apr 2021 11:55:32 -0600
Subject: implement function `words`

---
 src/makefile/functions.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/makefile/functions.rs b/src/makefile/functions.rs
index f1d43de..6e9d3cb 100644
--- a/src/makefile/functions.rs
+++ b/src/makefile/functions.rs
@@ -36,6 +36,10 @@ pub fn expand_call(
             assert_eq!(args.len(), 1);
             text::sort(macros, &args[0])
         }
+        "words" => {
+            assert_eq!(args.len(), 1);
+            text::words(macros, &args[0])
+        }
         "lastword" => {
             assert_eq!(args.len(), 1);
             text::lastword(macros, &args[0])
@@ -186,6 +190,11 @@ mod text {
         Ok(words.join(" "))
     }
 
+    pub fn words(macros: &MacroSet, words: &TokenString) -> Result<String> {
+        let words = macros.expand(words)?;
+        Ok(words.split_whitespace().count().to_string())
+    }
+
     pub fn lastword(macros: &MacroSet, words: &TokenString) -> Result<String> {
         let words = macros.expand(words)?;
         Ok(words.split_whitespace().last().unwrap_or("").to_owned())
-- 
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