Merge pull request #100 from czgdp1807/struct_01

Ported ``integration_tests/structs_01.py`` from LPython and improve LC to compile it

integration_tests/CMakeLists.txt

@@ -213,6 +213,7 @@ RUN(NAME struct_01.cpp LABELS gcc llvm NOFAST)
 RUN(NAME struct_02.cpp LABELS gcc llvm NOFAST)
 RUN(NAME struct_03.cpp LABELS gcc llvm NOFAST)
 RUN(NAME struct_04.cpp LABELS gcc llvm NOFAST)
+RUN(NAME struct_05.cpp LABELS gcc llvm NOFAST)
 
 RUN(NAME pointer_01.cpp LABELS gcc)
 RUN(NAME pointer_02.cpp LABELS gcc)

integration_tests/struct_05.cpp

@@ -0,0 +1,48 @@
+#include <iostream>
+
+struct A_t {
+    float y;
+    int32_t x;
+
+    constexpr A_t(float y_, int32_t x_): y(y_), x(x_) {}
+};
+
+void assert(bool condition) {
+    if( !condition ) {
+        exit(2);
+    }
+}
+
+void f(const A_t& a) {
+    std::cout << a.x << std::endl;
+    std::cout << a.y << std::endl;
+}
+
+void change_struct(A_t& a) {
+    a.x = a.x + 1;
+    a.y = a.y + float(1);
+}
+
+void g() {
+    A_t x = A_t(float(3.25), 3);
+    f(x);
+    assert( x.x == 3 );
+    assert( double(x.y) == 3.25 );
+
+    x.x = 5;
+    x.y = float(5.5);
+    f(x);
+    assert( x.x == 5 );
+    assert( double(x.y) == 5.5 );
+    change_struct(x);
+    assert( x.x == 6 );
+    assert( double(x.y) == 6.5 );
+}
+
+int main() {
+
+g();
+
+return 0;
+
+}