1 files changed, 5 insertions, 5 deletions

diff --git a/include/unicode.h b/include/unicode.h
index 277c4de..6b6f21a 100644
--- a/include/unicode.h
+++ b/include/unicode.h
@@ -199,14 +199,14 @@ namespace unicode::detail {
   // set value member
   void calculate_value()
   {
+   static_assert(sizeof(T) == 1 || sizeof(T) == 2 || sizeof(T) == 4);
+
    if constexpr(sizeof(T) == 1) {
     calculate_value_utf8();
    } else if constexpr (sizeof(T) == 2) {
     calculate_value_utf16();
    } else if constexpr (sizeof(T) == 4) {
     calculate_value_utf32();
-   } else {
-    throw std::runtime_error("Invalid character size: "s + std::to_string(sizeof(T)));
    }
   }
 
@@ -334,14 +334,14 @@ namespace unicode::detail {
 
   reference operator=(const char32_t& value)
   {
+   static_assert(sizeof(T) == 1 || sizeof(T) == 2 || sizeof(T) == 4);
+
    if constexpr(sizeof(T) == 1) {
     append_utf8(value);
    } else if constexpr(sizeof(T) == 2) {
     append_utf16(value);
    } else if constexpr(sizeof(T) == 4) {
     append_utf32(value);
-   } else {
-    throw std::runtime_error("Invalid type size: "s + std::to_string(sizeof(T)));
    }
    return *this;
   }
@@ -473,7 +473,7 @@ namespace unicode {
    }
 
    if (value > 255)
-    throw std::invalid_argument("Bad Unicode value above 255: "s + std::to_string(static_cast<uint32_t>(value)));
+    throw std::invalid_argument("Bad ISO 8859 value above 255: "s + std::to_string(static_cast<uint32_t>(value)));
 
    s.push_back(static_cast<typename iso_back_insert_iterator::value_type>(value));
    return *this;