✨ add stdin, stdout, stderr in io module

src/io_lib.cpp

@@ -5,9 +5,6 @@ namespace nasal {
 const auto file_type_name = "file";
 
 void filehandle_destructor(void* ptr) {
-    if (static_cast<FILE*>(ptr)==stdin) {
-        return;
-    }
     fclose(static_cast<FILE*>(ptr));
 }
 
@@ -207,6 +204,25 @@ var builtin_eof(context* ctx, gc* ngc) {
     ));
 }
 
+var builtin_stdin(context* ctx, gc* ngc) {
+    auto file_descriptor = ngc->alloc(vm_obj);
+    file_descriptor.ghost().set(file_type_name, nullptr, stdin);
+    return file_descriptor;
+}
+
+var builtin_stdout(context* ctx, gc* ngc) {
+    auto file_descriptor = ngc->alloc(vm_obj);
+    file_descriptor.ghost().set(file_type_name, nullptr, stdout);
+    return file_descriptor;
+}
+
+var builtin_stderr(context* ctx, gc* ngc) {
+    auto file_descriptor = ngc->alloc(vm_obj);
+    file_descriptor.ghost().set(file_type_name, nullptr, stderr);
+    return file_descriptor;
+}
+
+
 nasal_builtin_table io_lib_native[] = {
     {"__readfile", builtin_readfile},
     {"__fout", builtin_fout},
@@ -220,6 +236,9 @@ nasal_builtin_table io_lib_native[] = {
     {"__readln", builtin_readln},
     {"__stat", builtin_stat},
     {"__eof", builtin_eof},
+    {"__stdin", builtin_stdin},
+    {"__stdout", builtin_stdout},
+    {"__stderr", builtin_stderr},
     {nullptr, nullptr}
 };
 

src/io_lib.h

@@ -32,6 +32,9 @@ var builtin_tell(context*, gc*);
 var builtin_readln(context*, gc*);
 var builtin_stat(context*, gc*);
 var builtin_eof(context*, gc*);
+var builtin_stdin(context*, gc*);
+var builtin_stdout(context*, gc*);
+var builtin_stderr(context*, gc*);
 
 extern nasal_builtin_table io_lib_native[];
 

src/nasal_codegen.cpp

@@ -1168,7 +1168,7 @@ void codegen::block_gen(code_block* node) {
         switch(tmp->get_type()) {
             case expr_type::ast_null: break;
             case expr_type::ast_id:
-                if (need_repl_output) {
+                if (need_repl_output && local.empty()) {
                     repl_mode_info_output_gen(tmp);
                 } else {
                     check_id_exist((identifier*)tmp);
@@ -1178,7 +1178,7 @@ void codegen::block_gen(code_block* node) {
             case expr_type::ast_num:
             case expr_type::ast_str:
             case expr_type::ast_bool:
-                if (need_repl_output) {
+                if (need_repl_output && local.empty()) {
                     repl_mode_info_output_gen(tmp);
                 }
                 break;

std/io.nas

@@ -66,3 +66,9 @@ var stat = func(filename) {
 var eof = func(filehandle) {
     return __eof(filehandle);
 }
+
+var stdin = func() { return __stdin; }();
+
+var stdout = func() { return __stdout;}();
+
+var stderr = func() { return __stderr; }();