From 3333f7cc6e5bee683ae7349ed86304e20db5a675 Mon Sep 17 00:00:00 2001
From: Egor Tensin <egor@tensin.name>
Date: Thu, 4 Jun 2026 23:00:02 +0200
Subject: upgrade to std::format

---
 src/cmd_line.cpp |  6 +++---
 src/error.cpp    |  6 ++----
 src/handle.cpp   |  6 ++----
 src/process.cpp  | 10 ++++------
 4 files changed, 11 insertions(+), 17 deletions(-)

(limited to 'src')

diff --git a/src/cmd_line.cpp b/src/cmd_line.cpp
index 46281e2..1f20933 100644
--- a/src/cmd_line.cpp
+++ b/src/cmd_line.cpp
@@ -16,6 +16,7 @@
 // clang-format on
 
 #include <cstddef>
+#include <format>
 #include <memory>
 #include <sstream>
 #include <stdexcept>
@@ -129,9 +130,8 @@ std::string CommandLine::escape_cmd(std::string_view arg) {
 
     auto safe = escape(arg);
     for (const auto danger : dangerous_symbols) {
-        std::ostringstream replacement;
-        replacement << escape_symbol << danger;
-        boost::replace_all(safe, std::string{danger}, replacement.str());
+        const auto replacement = std::format("{}{}", escape_symbol, danger);
+        boost::replace_all(safe, std::string{danger}, replacement.data());
     }
     return safe;
 }
diff --git a/src/error.cpp b/src/error.cpp
index 3fd18ea..afc33f3 100644
--- a/src/error.cpp
+++ b/src/error.cpp
@@ -9,7 +9,7 @@
 #include <windows.h>
 
 #include <cstdint>
-#include <sstream>
+#include <format>
 #include <string>
 #include <string_view>
 #include <system_error>
@@ -27,9 +27,7 @@ std::wstring trim_trailing_newline(std::wstring_view s) {
 }
 
 std::string build_what(DWORD code, std::string_view function) {
-    std::ostringstream what;
-    what << "Function " << function << " failed with error code " << code;
-    return what.str();
+    return std::format("Function {} failed with error code {}", function, code);
 }
 
 std::string format_message(int32_t code) {
diff --git a/src/handle.cpp b/src/handle.cpp
index 2260aa3..916b8ae 100644
--- a/src/handle.cpp
+++ b/src/handle.cpp
@@ -13,7 +13,6 @@
 #include <cassert>
 #include <cstddef>
 #include <limits>
-#include <sstream>
 #include <stdexcept>
 #include <utility>
 
@@ -21,9 +20,8 @@ namespace winapi {
 namespace {
 
 std::runtime_error write_file_incomplete(std::size_t expected, std::size_t actual) {
-    std::ostringstream oss;
-    oss << "WriteFile could only write " << actual << " bytes instead of " << expected;
-    return std::runtime_error{oss.str()};
+    return std::runtime_error{
+        std::format("WriteFile could only write {} bytes instead of {}", actual, expected)};
 }
 
 bool is_std_handle(HANDLE handle) {
diff --git a/src/process.cpp b/src/process.cpp
index e0799d5..5886c41 100644
--- a/src/process.cpp
+++ b/src/process.cpp
@@ -18,8 +18,8 @@
 
 #include <cstddef>
 #include <cstring>
+#include <format>
 #include <limits>
-#include <sstream>
 #include <stdexcept>
 #include <string>
 #include <utility>
@@ -384,11 +384,9 @@ Resource Process::get_resource(uint32_t id) {
 
     const auto data = ::LockResource(resource);
 
-    if (data == NULL) {
-        std::ostringstream oss;
-        oss << "Couldn't get data pointer for resource with ID " << id;
-        throw std::runtime_error{oss.str()};
-    }
+    if (data == NULL)
+        throw std::runtime_error{
+            std::format("Couldn't get data pointer for resource with ID {}", id)};
 
     const auto nb = ::SizeofResource(module, src);
 
-- 
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