Make StringView and unit types trivial types

src/command_manager.cc

@@ -47,6 +47,8 @@ namespace
 struct Reader
 {
 public:
+    Reader(StringView s) : str{s}, pos{}, coord{} {}
+
     [[gnu::always_inline]]
     char operator*() const { return str[pos]; }
 

src/file.cc

@@ -86,7 +86,7 @@ String real_path(StringView filename)
     char buffer[PATH_MAX+1];
 
     StringView existing = filename;
-    StringView non_existing;
+    StringView non_existing{};
 
     while (true)
     {

src/insert_completer.cc

@@ -516,7 +516,7 @@ bool InsertCompleter::try_complete(Func complete_func)
     kak_assert(m_completions.begin <= sels.main().cursor());
     m_current_candidate = m_completions.candidates.size();
     menu_show();
-    m_completions.candidates.push_back({sels.buffer().string(m_completions.begin, m_completions.end), ""});
+    m_completions.candidates.push_back({sels.buffer().string(m_completions.begin, m_completions.end), "", {}});
     return true;
 }
 

src/main.cc

@@ -249,7 +249,7 @@ void register_options()
                    Vector<String, MemoryDomain::Options>({ "./", "/usr/include" }));
     reg.declare_option("completers", "insert mode completers to execute.",
                        InsertCompleterDescList({
-                           InsertCompleterDesc{ InsertCompleterDesc::Filename },
+                           InsertCompleterDesc{ InsertCompleterDesc::Filename, {} },
                            InsertCompleterDesc{ InsertCompleterDesc::Word, "all"_str }
                        }), OptionFlags::None);
     reg.declare_option("static_words", "list of words to always consider for insert word completion",

src/ranked_match.hh

@@ -44,7 +44,7 @@ private:
         FullMatch        = 1 << 5,
     };
 
-    StringView m_candidate;
+    StringView m_candidate{};
     Flags m_flags = Flags::None;
     int m_word_boundary_match_count = 0;
     int m_max_index = 0;

src/string.hh

@@ -211,7 +211,7 @@ private:
 class StringView : public StringOps<StringView, const char>
 {
 public:
-    constexpr StringView() = default;
+    StringView() = default;
     constexpr StringView(const char* data, ByteCount length)
         : m_data{data}, m_length{length} {}
     constexpr StringView(const char* data) : m_data{data}, m_length{data ? strlen(data) : 0} {}
@@ -248,10 +248,12 @@ public:
     ZeroTerminatedString zstr() const { return {begin(), end()}; }
 
 private:
-    const char* m_data = nullptr;
+    const char* m_data;
-    ByteCount m_length = 0;
+    ByteCount m_length;
 };
 
+static_assert(std::is_trivial<StringView>::value, "");
+
 template<typename Type, typename CharType>
 inline StringView StringOps<Type, CharType>::substr(ByteCount from, ByteCount length) const
 {

src/units.hh

@@ -13,6 +13,8 @@ template<typename RealType, typename ValueType = int>
 class StronglyTypedNumber
 {
 public:
+    StronglyTypedNumber() = default;
+
     [[gnu::always_inline]]
     explicit constexpr StronglyTypedNumber(ValueType value)
         : m_value(value)
@@ -124,8 +126,10 @@ protected:
 
 struct LineCount : public StronglyTypedNumber<LineCount, int>
 {
+    LineCount() = default;
+
     [[gnu::always_inline]]
-    constexpr LineCount(int value = 0) : StronglyTypedNumber<LineCount>(value) {}
+    constexpr LineCount(int value) : StronglyTypedNumber<LineCount>(value) {}
 };
 
 [[gnu::always_inline]]
@@ -136,8 +140,10 @@ inline constexpr LineCount operator"" _line(unsigned long long int value)
 
 struct ByteCount : public StronglyTypedNumber<ByteCount, int>
 {
+    ByteCount() = default;
+
     [[gnu::always_inline]]
-    constexpr ByteCount(int value = 0) : StronglyTypedNumber<ByteCount>(value) {}
+    constexpr ByteCount(int value) : StronglyTypedNumber<ByteCount>(value) {}
 };
 
 [[gnu::always_inline]]
@@ -148,8 +154,10 @@ inline constexpr ByteCount operator"" _byte(unsigned long long int value)
 
 struct CharCount : public StronglyTypedNumber<CharCount, int>
 {
+    CharCount() = default;
+
     [[gnu::always_inline]]
-    constexpr CharCount(int value = 0) : StronglyTypedNumber<CharCount>(value) {}
+    constexpr CharCount(int value) : StronglyTypedNumber<CharCount>(value) {}
 };
 
 [[gnu::always_inline]]
@@ -160,8 +168,10 @@ inline constexpr CharCount operator"" _char(unsigned long long int value)
 
 struct ColumnCount : public StronglyTypedNumber<ColumnCount, int>
 {
+    ColumnCount() = default;
+
     [[gnu::always_inline]]
-    constexpr ColumnCount(int value = 0) : StronglyTypedNumber<ColumnCount>(value) {}
+    constexpr ColumnCount(int value) : StronglyTypedNumber<ColumnCount>(value) {}
 };
 
 [[gnu::always_inline]]