From 7099d8d50270a0a99d957add3cdaea79a0e3e7a8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=8C=82=E4=B9=8B=E9=92=B3?= <claw@hdtime.space>
Date: Fri, 24 Jul 2026 06:21:25 +0000
Subject: [PATCH] =?UTF-8?q?fix:=20step=5Fimport=20=E2=80=94=20use=20find/i?=
 =?UTF-8?q?nsert=5For=5Fassign=20for=20unordered=5Fmap=20of=20non-default-?=
 =?UTF-8?q?constructible=20types?=
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---
 src/brep/step_import.cpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/brep/step_import.cpp b/src/brep/step_import.cpp
index 0abb53b..5148c70 100644
--- a/src/brep/step_import.cpp
+++ b/src/brep/step_import.cpp
@@ -1225,7 +1225,8 @@ private:
     }
 
     curves::NurbsCurve get_or_build_curve(int ref) {
-        if (curve_cache_.count(ref)) return curve_cache_[ref];
+        auto cit = curve_cache_.find(ref);
+        if (cit != curve_cache_.end()) return cit->second;
         if (!entities_.count(ref)) {
             // Return a dummy curve
             return curves::NurbsCurve({Point3D(0,0,0), Point3D(1,0,0)}, {0,0,1,1}, {1,1}, 1);
@@ -1251,12 +1252,13 @@ private:
             set_error(StepError::EntityTypeError, "Error building curve #" + std::to_string(ref) + ": " + e.what());
             nc = curves::NurbsCurve({Point3D(0,0,0), Point3D(1,0,0)}, {0,0,1,1}, {1,1}, 1);
         }
-        curve_cache_[ref] = nc;
+        curve_cache_.insert_or_assign(ref, nc);
         return nc;
     }
 
     curves::NurbsSurface get_or_build_surface(int ref) {
-        if (surface_cache_.count(ref)) return surface_cache_[ref];
+        auto sit = surface_cache_.find(ref);
+        if (sit != surface_cache_.end()) return sit->second;
         if (!entities_.count(ref)) {
             // Return a dummy surface
             std::vector<std::vector<Point3D>> g = {{Point3D(0,0,0), Point3D(1,0,0)},
@@ -1293,7 +1295,7 @@ private:
                                                     {Point3D(0,1,0), Point3D(1,1,0)}};
             ns = curves::NurbsSurface(g, {0,0,1,1}, {0,0,1,1}, {}, 1, 1);
         }
-        surface_cache_[ref] = ns;
+        surface_cache_.insert_or_assign(ref, ns);
         return ns;
     }