From 54570cbc0d6e4798ad47a9db2e726372cfc13297 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20Ankarstr=C3=B6m?= <john@ankarstrom.se>
Date: Sat, 16 Jul 2022 18:27:21 +0200
Subject: Formatting.

---
 c/common.h | 30 +++++++++++++++++-------------
 1 file changed, 17 insertions(+), 13 deletions(-)

(limited to 'c/common.h')

diff --git a/c/common.h b/c/common.h
index 738368f..4b28360 100644
--- a/c/common.h
+++ b/c/common.h
@@ -6,7 +6,14 @@
 #include <stdexcept>
 #include <windows.h>
 
+#ifdef UNICODE
+#define WA "W"
+#else
+#define WA "A"
+#endif
+
 std::basic_string<TCHAR> TsmFromSz(const char *, int);
+
 struct Win32Error : public std::exception
 {
 	Win32Error(DWORD);
@@ -16,6 +23,7 @@ private:
 	DWORD m_dwErr;
 	char *m_szMsg = NULL;
 };
+
 struct Library
 {
 	Library(const TCHAR *);
@@ -25,32 +33,28 @@ private:
 	HMODULE m_hModule;
 };
 
-#ifdef UNICODE
-#define WA "W"
-#else
-#define WA "A"
-#endif
-
 inline int Cmp(int a, int b)
 {
-	if (a == b)
-		return 0;
-	if (a > b)
-		return 1;
+	if (a == b) return 0;
+	if (a > b) return 1;
 	return -1;
 }
 
+/* Return integer scaled for current DPI. */
 inline int Dpi(int i)
 {
 	extern int g_iDPI;
 	return MulDiv(i, g_iDPI, 96);
 }
 
-template <class T, typename ...A>
-std::optional<T> try_make(A ...args)
+/* Create and return an object of type C. If construction fails,
+ * return nothing. The returned value must be checked before being
+ * used, as dereferencing is undefined if the value is empty. */
+template <class C, typename ...T>
+std::optional<C> try_make(T ...args)
 {
 	try {
-		return T(args...);
+		return C(args...);
 	} catch (...) {
 		return {};
 	}
-- 
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