gcc fixes

Rakefile

@@ -35,7 +35,7 @@ end
 
 desc "test build with gcc"
 task :gcc do
-  sh %Q[g++-mp-13 -O3 -std=c++2a -Wfatal-errors -Wall -Wextra -Wpedantic -o /dev/stdout src/main.cpp | wc -c]
+  sh %Q[g++-mp-13 -O3 -std=c++2a -Wfatal-errors -Wall -Wextra -Wpedantic -Ibuild/lazperf/src/lazperf/cpp -S -o /dev/null src/main.cpp]
 end
 
 desc "download WKT strings and generate src/wkts.hpp"

src/point.hpp

@@ -55,15 +55,16 @@ auto operator>(Point const &p1, Point const &p2) {
 		std::tuple(p2.key_point, p2.ground(), p1.elevation);
 }
 
-template <>
-Bounds::Bounds(Point const &point) {
-	std::tie(xmin, ymin) = std::tie(xmax, ymax) = point;
-}
-
 template <>
 struct std::tuple_size<Point> : std::integral_constant<std::size_t, 2> { };
 
 template <std::size_t M>
 struct std::tuple_element<M, Point> { using type = double; };
 
+template <>
+Bounds::Bounds(Point const &point) {
+	auto const &[x, y] = point;
+	xmin = xmax = x, ymin = ymax = y;
+}
+
 #endif

src/vertex.hpp

@@ -9,14 +9,14 @@
 
 #include "vector.hpp"
 #include "bounds.hpp"
-#include <tuple>
 #include <cstddef>
 
 using Vertex = Vector<2>;
 
 template <>
 Bounds::Bounds(Vertex const &vertex) {
-	std::tie(xmin, ymin) = std::tie(xmax, ymax) = vertex;
+	auto const &[x, y] = vertex;
+	xmin = xmax = x, ymin = ymax = y;
 }
 
 template <> struct std::hash<Vertex> {