Merge pull request #101 from czgdp1807/struct_02

Ported ``integration_tests/structs_04.py`` from LPython and improve LC to compile it

Author: czgdp1807

integration_tests/CMakeLists.txt

@@ -214,6 +214,7 @@ 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 struct_06.cpp LABELS gcc llvm NOFAST)
 
 RUN(NAME pointer_01.cpp LABELS gcc)
 RUN(NAME pointer_02.cpp LABELS gcc)

integration_tests/struct_06.cpp

@@ -0,0 +1,60 @@
+#include <iostream>
+
+struct A_t {
+    float y;
+    int32_t x;
+};
+
+struct B_t {
+    int32_t z;
+    struct A_t a;
+};
+
+void init_A_t(A_t& a, float y_, int32_t x_) {
+    a.y = y_;
+    a.x = x_;
+}
+
+void init_B_t(B_t& b, int32_t z_, struct A_t a_) {
+    b.z = z_;
+    b.a = a_;
+}
+
+void assert(bool condition) {
+    if( !condition ) {
+        exit(2);
+    }
+}
+
+void f(const B_t& b) {
+    std::cout << b.z << " " << b.a.x << " " << b.a.y << std::endl;
+    assert( b.z == 1 );
+    assert( b.a.x == 2 );
+    assert( double(b.a.y) == 3.0 );
+}
+
+void g() {
+    struct A_t a1;
+    struct A_t a2;
+    struct B_t b;
+    init_A_t(a1, float(1.0), 1);
+    init_A_t(a2, float(2.0), 2);
+    init_B_t(b, 1, a1);
+    b.a = a2;
+    b.z = 1;
+    b.a.x = 2;
+    b.a.y = float(3.0);
+    assert( a1.x == 1 );
+    assert( double(a1.y) == 1.0 );
+    assert( a2.x == 2 );
+    assert( double(a2.y) == 2.0 );
+    f(b);
+}
+
+int main() {
+
+g();
+
+return 0;
+
+}

src/lc/clang_ast_to_asr.cpp

@@ -504,6 +504,9 @@ class ClangASTtoASRVisitor: public clang::RecursiveASTVisitor<ClangASTtoASRVisit
                 if( init_expr->getStmtClass() == clang::Stmt::StmtClass::InitListExprClass ) {
                     init_expr = static_cast<clang::InitListExpr*>(init_expr)->getInit(0);
                 }
+                if( init_expr->getStmtClass() == clang::Stmt::StmtClass::CXXConstructExprClass ) {
+                    init_expr = static_cast<clang::CXXConstructExpr*>(init_expr)->getArg(0);
+                }
                 if( init_expr->getStmtClass() != clang::Stmt::StmtClass::ImplicitCastExprClass ||
                     static_cast<clang::ImplicitCastExpr*>(init_expr)->getSubExpr()->getStmtClass() !=
                     clang::Stmt::StmtClass::DeclRefExprClass ) {