Append .0 to unsuffixed float if it would otherwise become int token

dtolnay · dtolnay · commit 7bdeb3e25827 · 2021-10-25T20:30:47.000-07:00
diff --git a/proc_macro/src/lib.rs b/proc_macro/src/lib.rs
@@ -1074,7 +1074,11 @@ impl Literal {
         if !n.is_finite() {
             panic!("Invalid float literal {}", n);
         }
-        Literal(bridge::client::Literal::float(&n.to_string()))
+        let mut repr = n.to_string();
+        if !repr.contains('.') {
+            repr.push_str(".0");
+        }
+        Literal(bridge::client::Literal::float(&repr))
     }
 
     /// Creates a new suffixed floating-point literal.
@@ -1115,7 +1119,11 @@ impl Literal {
         if !n.is_finite() {
             panic!("Invalid float literal {}", n);
         }
-        Literal(bridge::client::Literal::float(&n.to_string()))
+        let mut repr = n.to_string();
+        if !repr.contains('.') {
+            repr.push_str(".0");
+        }
+        Literal(bridge::client::Literal::float(&repr))
     }
 
     /// Creates a new suffixed floating-point literal.

Original file line number	Diff line number	Diff line change
`@@ -1074,7 +1074,11 @@ impl Literal {`
`1074`	`1074`	`if !n.is_finite() {`
`1075`	`1075`	`panic!("Invalid float literal {}", n);`
`1076`	`1076`	`}`
`1077`		`- Literal(bridge::client::Literal::float(&n.to_string()))`
	`1077`	`+ let mut repr = n.to_string();`
	`1078`	`+ if !repr.contains('.') {`
	`1079`	`+ repr.push_str(".0");`
	`1080`	`+ }`
	`1081`	`+ Literal(bridge::client::Literal::float(&repr))`
`1078`	`1082`	`}`
`1079`	`1083`
`1080`	`1084`	`/// Creates a new suffixed floating-point literal.`
`@@ -1115,7 +1119,11 @@ impl Literal {`
`1115`	`1119`	`if !n.is_finite() {`
`1116`	`1120`	`panic!("Invalid float literal {}", n);`
`1117`	`1121`	`}`
`1118`		`- Literal(bridge::client::Literal::float(&n.to_string()))`
	`1122`	`+ let mut repr = n.to_string();`
	`1123`	`+ if !repr.contains('.') {`
	`1124`	`+ repr.push_str(".0");`
	`1125`	`+ }`
	`1126`	`+ Literal(bridge::client::Literal::float(&repr))`
`1119`	`1127`	`}`
`1120`	`1128`
`1121`	`1129`	`/// Creates a new suffixed floating-point literal.`