[ox/std] Remove append operators from IString

This is because the append operators cannot report the failure that is possible with IString

deps/ox/src/ox/std/fmt.hpp

@@ -195,7 +195,7 @@ constexpr StringType sfmt(StringView fmt, Args&&... args) noexcept {
 	std::ignore = out.append(firstSegment.str, firstSegment.length);
 	const detail::FmtArg elements[sizeof...(args)] = {args...};
 	for (size_t i = 0; i < fmtSegments.size - 1; ++i) {
-		out += elements[i].out;
+		std::ignore = out.append(elements[i].out.data(), elements[i].out.len());
 		const auto &s = fmtSegments.segments[i + 1];
 		std::ignore = out.append(s.str, s.length);
 	}

deps/ox/src/ox/std/istring.hpp

@@ -9,7 +9,6 @@
 #pragma once
 
 #include "array.hpp"
-#include "ignore.hpp"
 #include "memops.hpp"
 #include "ox/std/error.hpp"
 #include "stringview.hpp"
@@ -39,19 +38,6 @@ class IString {
 
 		constexpr IString &operator=(Integer_c auto i) noexcept;
 
-		constexpr IString &operator+=(const char *str) noexcept;
-
-		constexpr IString &operator+=(char *str) noexcept;
-
-		constexpr IString &operator+=(Integer_c auto i) noexcept;
-
-		constexpr IString &operator+=(StringView s) noexcept;
-
-		constexpr IString operator+(const char *str) const noexcept;
-
-		constexpr IString operator+(char *str) const noexcept;
-
-		constexpr IString operator+(Integer_c auto i) const noexcept;
 
 		constexpr bool operator==(const char *other) const noexcept;
 
@@ -67,6 +53,8 @@ class IString {
 
 		constexpr Error append(const char *str, std::size_t strLen) noexcept;
 
+		constexpr Error append(ox::StringView str) noexcept;
+
 		[[nodiscard]]
 		constexpr const char *data() const noexcept;
 
@@ -149,52 +137,6 @@ constexpr IString<size> &IString<size>::operator=(char *str) noexcept {
 	return *this = static_cast<const char*>(str);
 }
 
-template<std::size_t size>
-constexpr IString<size> &IString<size>::operator+=(const char *str) noexcept {
-	std::size_t strLen = ox::strlen(str) + 1;
-	std::ignore = append(str, strLen);
-	return *this;
-}
-
-template<std::size_t size>
-constexpr IString<size> &IString<size>::operator+=(char *str) noexcept {
-	return *this += static_cast<const char*>(str);
-}
-
-template<std::size_t size>
-constexpr IString<size> &IString<size>::operator+=(Integer_c auto i) noexcept {
-	ox::Array<char, 65> str{};
-	ox::itoa(i, str.data());
-	return this->operator+=(str.data());
-}
-
-template<std::size_t size>
-constexpr IString<size> &IString<size>::operator+=(StringView s) noexcept {
-	std::size_t strLen = s.bytes();
-	std::ignore = append(s.data(), strLen);
-	return *this;
-}
-
-template<std::size_t size>
-constexpr IString<size> IString<size>::operator+(const char *str) const noexcept {
-	auto out = *this;
-	std::size_t strLen = ox::strlen(str) + 1;
-	std::ignore = out.append(str, strLen);
-	return out;
-}
-
-template<std::size_t size>
-constexpr IString<size> IString<size>::operator+(char *str) const noexcept {
-	return *this + static_cast<const char*>(str);
-}
-
-template<std::size_t size>
-constexpr IString<size> IString<size>::operator+(Integer_c auto i) const noexcept {
-	ox::Array<char, 65> str{};
-	ox::itoa(i, str.data());
-	return this->operator+(str.data());
-}
-
 template<std::size_t StrCap>
 constexpr bool IString<StrCap>::operator==(const char *other) const noexcept {
 	return ox::StringView(*this) == other;
@@ -227,7 +169,22 @@ constexpr char &IString<StrCap>::operator[](std::size_t i) noexcept {
 
 template<std::size_t StrCap>
 constexpr Error IString<StrCap>::append(const char *str, std::size_t strLen) noexcept {
-	Error err;
+	Error err{};
+	auto currentLen = len();
+	if (cap() < currentLen + strLen + 1) {
+		strLen = cap() - currentLen;
+		err = OxError(1, "Insufficient space for full string");
+	}
+	ox::strncpy(m_buff.data() + currentLen, str, strLen);
+	// make sure last element is a null terminator
+	m_buff[currentLen + strLen] = 0;
+	return err;
+}
+
+template<std::size_t StrCap>
+constexpr Error IString<StrCap>::append(ox::StringView str) noexcept {
+	auto strLen = str.len();
+	Error err{};
 	auto currentLen = len();
 	if (cap() < currentLen + strLen + 1) {
 		strLen = cap() - currentLen;

deps/ox/src/ox/std/test/tests.cpp

@@ -6,6 +6,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  */
 
+#include "ox/std/def.hpp"
 #undef NDEBUG
 
 #include <map>
@@ -69,10 +70,10 @@ static std::map<ox::StringView, ox::Error(*)()> tests = {
 		"BString",
 		[]() {
 			ox::IString<5> s;
-			s += "A";
+			oxReturnError(s.append("A"));
-			s += "B";
+			oxReturnError(s.append("B"));
-			s += 9;
+			oxReturnError(s.append("9"));
-			s += "C";
+			oxReturnError(s.append("C"));
 			oxAssert(s == "AB9C", "BString append broken");
 			s = "asdf";
 			oxAssert(s == "asdf", "String assign broken");

deps/ox/src/ox/std/uuid.hpp

@@ -8,6 +8,7 @@
 
 #pragma once
 
+#include "ignore.hpp"
 #include "istring.hpp"
 #include "buffer.hpp"
 #include "random.hpp"