TextSized is not meant to be used directly...

so rename it to a name more distinct from TextSize.

lib/text-size/src/lib.rs

@@ -12,7 +12,7 @@ mod traits;
 #[cfg(feature = "serde")]
 mod serde_impls;
 
-pub use crate::{range::TextRange, size::TextSize, traits::TextSized};
+pub use crate::{range::TextRange, size::TextSize, traits::LenTextSize};
 
 #[cfg(target_pointer_width = "16")]
 compile_error!("text-size assumes usize >= u32 and does not work on 16-bit targets");

lib/text-size/src/size.rs

@@ -1,5 +1,5 @@
 use {
-    crate::TextSized,
+    crate::LenTextSize,
     std::{
         convert::TryFrom,
         fmt, iter,
@@ -42,8 +42,8 @@ impl fmt::Debug for TextSize {
 impl TextSize {
     /// The text size of some text-like object.
     #[inline]
-    pub fn of(text: impl TextSized) -> TextSize {
-        text.text_size()
+    pub fn of(text: impl LenTextSize) -> TextSize {
+        text.len_text_size()
     }
 
     /// A size of zero.

lib/text-size/src/traits.rs

@@ -4,33 +4,33 @@ use {
 };
 
 /// Text-like structures that have a text size.
-pub trait TextSized: Copy {
+pub trait LenTextSize: Copy {
     /// The size of this text-alike.
-    fn text_size(self) -> TextSize;
+    fn len_text_size(self) -> TextSize;
 }
 
-impl TextSized for &'_ str {
+impl LenTextSize for &'_ str {
     #[inline]
-    fn text_size(self) -> TextSize {
+    fn len_text_size(self) -> TextSize {
         self.len()
             .try_into()
             .unwrap_or_else(|_| panic!("string too large ({}) for TextSize", self.len()))
     }
 }
 
-impl<D> TextSized for &'_ D
+impl<D> LenTextSize for &'_ D
 where
     D: Deref<Target = str>,
 {
     #[inline]
-    fn text_size(self) -> TextSize {
-        self.deref().text_size()
+    fn len_text_size(self) -> TextSize {
+        self.deref().len_text_size()
     }
 }
 
-impl TextSized for char {
+impl LenTextSize for char {
     #[inline]
-    fn text_size(self) -> TextSize {
+    fn len_text_size(self) -> TextSize {
         (self.len_utf8() as u32).into()
     }
 }