Implement dedent proc_macro

tests/main.rs

@@ -0,0 +1,100 @@
+use dedent::dedent;
+
+#[test]
+fn dedent_typical() {
+    assert_eq!(
+        dedent! {"
+            foo  
+            
+                bar
+            baz
+        "},
+        "foo\n\n    bar\nbaz"
+    );
+}
+
+#[test]
+fn dedent_typical_parens() {
+    assert_eq!(
+        dedent!(
+            "
+            foo  
+              bar
+
+            baz
+
+            "
+        ),
+        "foo\n  bar\n\nbaz"
+    );
+}
+
+#[test]
+fn dedent_whitespace() {
+    assert_eq!(
+        dedent! {"
+           
+               
+        "},
+        ""
+    );
+}
+
+#[test]
+fn dedent_trim_trailing() {
+    assert_eq!(
+        dedent! {"
+           trailing:        
+        "},
+        "trailing:"
+    );
+}
+
+#[test]
+fn dedent_flat() {
+    assert_eq!(dedent! {"foo"}, "foo");
+}
+
+#[test]
+fn dedent_raw_no_padding() {
+    assert_eq!(
+        dedent! {r"
+            fo\o
+              bar
+        "},
+        "fo\\o\n  bar"
+    );
+}
+
+#[test]
+fn dedent_raw_with_padding() {
+    assert_eq!(
+        dedent! {r###"
+            fo\o
+              #bar
+        "###},
+        "fo\\o\n  #bar"
+    );
+}
+
+#[test]
+fn dedent_c_string() {
+    assert_eq!(
+        dedent! {c"
+         foo
+          bar
+        "},
+        c"foo\n bar"
+    );
+}
+
+#[test]
+fn dedent_raw_c_string() {
+    assert_eq!(
+        dedent! {cr##"
+         f\oo
+          b#ar
+        "##},
+        c"f\\oo\n b#ar"
+    );
+}