From 11621a13adb0e34cddc8d6b1507251baf7f1c5aa Mon Sep 17 00:00:00 2001
From: tk <tk@localhost>
Date: Sat, 13 Mar 2021 21:44:42 +0100
Subject: [PATCH] add check the source still compiles with -std=c++98

---
 examples/Makefile                  |  5 ++++-
 examples/tests/simple_demo_c98.cpp | 24 ++++++++++++++++++++++++
 2 files changed, 28 insertions(+), 1 deletion(-)
 create mode 100644 examples/tests/simple_demo_c98.cpp

diff --git a/examples/Makefile b/examples/Makefile
index 6b4041c..4393b87 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -16,7 +16,7 @@ LFLAGS=
 
 PROGS=simple_demo plot plot_avg_preserv plot_parametric plot_bspline
 PROGS_ALGLIB=plot_alglib bench
-PROGS_TESTS=tests/unit_tests tests/compile_units
+PROGS_TESTS=tests/unit_tests tests/compile_units tests/simple_demo_c98
 
 all:		${PROGS}
 more:		${PROGS_ALGLIB}
@@ -37,9 +37,12 @@ plot_bspline:	plot_bspline.o
 
 tests/compile_units:	tests/compile_units.o tests/myfunc1.o tests/myfunc2.o
 		${CC} $? -o $@ 
+tests/simple_demo_c98:	tests/simple_demo_c98.cpp ../src/spline.h
+		${CC} -Wall -Wextra -Werror -I../src -std=c++98 $< -o $@
 tests/unit_tests:	tests/unit_tests.o
 		${CC} $< -o $@ -lboost_unit_test_framework
 
+
 %.o: 		%.cpp ../src/spline.h
 		${CC} ${CFLAGS} -c $< -o $@
 
diff --git a/examples/tests/simple_demo_c98.cpp b/examples/tests/simple_demo_c98.cpp
new file mode 100644
index 0000000..48c36a5
--- /dev/null
+++ b/examples/tests/simple_demo_c98.cpp
@@ -0,0 +1,24 @@
+#include <cstdio>
+#include <cstdlib>
+#include <vector>
+#include "spline.h"
+
+int main(int argc, char** argv)
+{
+    double x=0.0;
+    if(argc>1)
+        x = atof(argv[1]);
+
+    std::vector<double> X(5), Y(5);
+    X[0]=-0.1; X[1]=0.4; X[2]=1.2; X[3]=1.8; X[4]=2.0;
+    Y[0]=0.1; Y[1]=0.7; Y[2]=0.6; Y[3]=1.1; Y[4]=0.9;
+
+
+    tk::spline s1(X,Y); // defaults to C^2 cubic spline (spline::cspline)
+    tk::spline s2(X,Y,tk::spline::cspline_hermite);
+    tk::spline s3(X,Y,tk::spline::linear);
+
+    printf("spline(%.3f): cubic (C^2) = %.3f, cubic hermite = %.3f, linear = %.3f\n", x, s1(x), s2(x), s3(x));
+
+    return EXIT_SUCCESS;
+}