fix: goexports performs correct conversion on float32 constants

_test/math1.go

@@ -0,0 +1,13 @@
+package main
+
+import "math"
+
+func main() {
+	var f float32
+	if f < math.MaxFloat32 {
+		println("ok")
+	}
+}
+
+// Output:
+// ok

cmd/goexports/goexports.go

@@ -254,7 +254,14 @@ func genContent(dest, pkgName, license string) ([]byte, error) {
 
 // fixConst checks untyped constant value, converting it if necessary to avoid overflow
 func fixConst(name string, val constant.Value) string {
-	if val.Kind() == constant.Int {
+	switch val.Kind() {
+	case constant.Float:
+		str := val.ExactString()
+		if _, err := strconv.ParseFloat(str, 32); err == nil {
+			return "float32(" + name + ")"
+		}
+		return name
+	case constant.Int:
 		str := val.ExactString()
 		i, err := strconv.ParseInt(str, 0, 64)
 		if err == nil {
@@ -271,8 +278,10 @@ func fixConst(name string, val constant.Value) string {
 		if err == nil {
 			return "uint64(" + name + ")"
 		}
+		return name
+	default:
+		return name
 	}
-	return name
 }
 
 // genLicense generates the correct LICENSE header text from the provided