Be 16-bit clean

matklad · matklad · commit b8621776f11d · 2020-03-12T12:31:37.000+01:00
diff --git a/src/size.rs b/src/size.rs
@@ -97,7 +97,12 @@ impl TryFrom<usize> for TextSize {
 
 impl From<TextSize> for usize {
     fn from(value: TextSize) -> Self {
-        value.raw as usize
+        assert_lossless_conversion();
+        return value.raw as usize;
+
+        const fn assert_lossless_conversion() {
+            [()][(std::mem::size_of::<usize>() < std::mem::size_of::<u32>()) as usize]
+        }
     }
 }
 

Original file line number	Diff line number	Diff line change
`@@ -97,7 +97,12 @@ impl TryFrom<usize> for TextSize {`
`97`	`97`
`98`	`98`	`impl From<TextSize> for usize {`
`99`	`99`	`fn from(value: TextSize) -> Self {`
`100`		`- value.raw as usize`
	`100`	`+ assert_lossless_conversion();`
	`101`	`+ return value.raw as usize;`
	`102`	`+`
	`103`	`+ const fn assert_lossless_conversion() {`
	`104`	`+ [()][(std::mem::size_of::<usize>() < std::mem::size_of::<u32>()) as usize]`
	`105`	`+ }`
`101`	`106`	`}`
`102`	`107`	`}`
`103`	`108`