fix(to_c_compiler): string literal should compile to a valid c string…

… literal

compiler/src/compiler/to_c_compiler.cpp

@@ -674,7 +674,8 @@ void to_c_compiler::visit_literal_expr(literal_expr *obj) {
   if (data_type_tok == token_type::STRING ||
       data_type_tok == token_type::THREE_QUOTE_STRING) {
     ykobject str_lit_object = ykobject(obj->literal_token_->token_, dt_pool_);
-    push("<><>", str_lit_object);
+    std::string string_literal = "\"" + string_utils::escape(string_utils::unescape(obj->literal_token_->token_)) + "\"";
+    push(string_literal, str_lit_object);
   } else if (obj->literal_token_->type_ == token_type::KEYWORD_TRUE) {
     push("true", ykobject(dt_pool_->create("bool")));
   } else if (obj->literal_token_->type_ == token_type::KEYWORD_FALSE) {

compiler/test_data/bug_fixes/easy_cstr.yaka

@@ -0,0 +1,8 @@
+import libs.c
+
+def myfunc(d: c.CStr) -> None:
+    pass
+
+def main() -> int:
+    myfunc(cast("c.CStr", "hello\nworld\n"))
+    return 0

compiler/test_data/bug_fixes/easy_cstr.yaka.c

@@ -0,0 +1,21 @@
+// YK
+#include "yk__lib.h"
+// --forward declarations-- 
+#define yy__c_CStr char*
+void yy__myfunc(yy__c_CStr);
+int32_t yy__main();
+// --structs-- 
+// --functions-- 
+void yy__myfunc(yy__c_CStr yy__d) 
+{
+    // pass;
+    return;
+}
+int32_t yy__main() 
+{
+    yy__myfunc(((yy__c_CStr)"hello\nworld\n"));
+    return INT32_C(0);
+}
+#if defined(YK__MINIMAL_MAIN)
+int main(void) { return yy__main(); }
+#endif

compiler/tests/test_compiler.cpp

@@ -379,6 +379,9 @@ TEST_CASE("compiler: fixed arrays - structure data types") {
 TEST_CASE("compiler: bug-fix - access struct str member") {
   test_compile_yaka_file("../test_data/bug_fixes/struct_str_return.yaka");
 }
+TEST_CASE("compiler: bug-fix - cast string literal should work as expected") {
+  test_compile_yaka_file("../test_data/bug_fixes/easy_cstr.yaka");
+}
 TEST_CASE("compiler: directive - ccode") {
   test_compile_yaka_file("../test_data/compiler_tests/directives/directive_ccode.yaka");
 }