From 71f98dd05615cd5a06a02cb8a7e37b47e9bbd874 Mon Sep 17 00:00:00 2001
From: Jeff Mears <jmears@blizzard.com>
Date: Mon, 7 Feb 2022 17:09:43 -0800
Subject: [PATCH] Declare ImVec2 and ImVec4 constructors as constexpr (#4995)

---
 docs/CHANGELOG.txt |  1 +
 imgui.h            | 10 +++++-----
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/docs/CHANGELOG.txt b/docs/CHANGELOG.txt
index e81d60570..37d29c175 100644
--- a/docs/CHANGELOG.txt
+++ b/docs/CHANGELOG.txt
@@ -40,6 +40,7 @@ Breaking changes:
 Other Changes:
 
 - Stack Tool: Added option to copy item path to clipboard. (#4631)
+- Misc: Added constexpr to ImVec2/ImVec4 inline constructors. (#4995) [@Myriachan]
 - Drawlist: Fixed PathArcTo() emitting terminating vertices too close to arc vertices. (#4993) [@thedmd]
 
 
diff --git a/imgui.h b/imgui.h
index 8f7378b8a..2204a86d5 100644
--- a/imgui.h
+++ b/imgui.h
@@ -249,8 +249,8 @@ IM_MSVC_RUNTIME_CHECKS_OFF
 struct ImVec2
 {
     float                                   x, y;
-    ImVec2()                                { x = y = 0.0f; }
-    ImVec2(float _x, float _y)              { x = _x; y = _y; }
+    constexpr ImVec2()                      : x(0.0f), y(0.0f) { }
+    constexpr ImVec2(float _x, float _y)    : x(_x), y(_y) { }
     float  operator[] (size_t idx) const    { IM_ASSERT(idx <= 1); return (&x)[idx]; }    // We very rarely use this [] operator, the assert overhead is fine.
     float& operator[] (size_t idx)          { IM_ASSERT(idx <= 1); return (&x)[idx]; }    // We very rarely use this [] operator, the assert overhead is fine.
 #ifdef IM_VEC2_CLASS_EXTRA
@@ -261,9 +261,9 @@ struct ImVec2
 // ImVec4: 4D vector used to store clipping rectangles, colors etc. [Compile-time configurable type]
 struct ImVec4
 {
-    float                                           x, y, z, w;
-    ImVec4()                                        { x = y = z = w = 0.0f; }
-    ImVec4(float _x, float _y, float _z, float _w)  { x = _x; y = _y; z = _z; w = _w; }
+    float                                                     x, y, z, w;
+    constexpr ImVec4()                                        : x(0.0f), y(0.0f), z(0.0f), w(0.0f) { }
+    constexpr ImVec4(float _x, float _y, float _z, float _w)  : x(_x), y(_y), z(_z), w(_w) { }
 #ifdef IM_VEC4_CLASS_EXTRA
     IM_VEC4_CLASS_EXTRA     // Define additional constructors and implicit cast operators in imconfig.h to convert back and forth between your math types and ImVec4.
 #endif