Fortran: Ptype, print type extension.

Print base-class of an extended type when doing a ptype.

2016-05-24  Bernhard Heckel  <bernhard.heckel@intel.com>

gdb/Changelog:
	* gdb/f-typeprint.c (f_type_print_derivation_info): New.
	(f_type_print_base): Print baseclass info.

gdb/Testsuite/Changelog:
	* gdb.fortran/oop_extend_type.exp: Adapt expected results.

Change-Id: I95e91357137a7b5aa178ffd7bb6839feb6b436bb
diff --git a/gdb/f-typeprint.c b/gdb/f-typeprint.c
index 920c21f..06919ee 100644
--- a/gdb/f-typeprint.c
+++ b/gdb/f-typeprint.c
@@ -254,6 +254,24 @@
     }
 }
 
+/* If TYPE is an extended type, then print out derivation information.
+
+   A typical output could look like this:
+   "Type, extends(point) :: waypoint"
+   "    Type point :: point"
+   "    real(kind=4) :: angle"
+   "End Type waypoint"
+ */
+
+static void
+f_type_print_derivation_info (struct type *type, struct ui_file *stream)
+{
+  int i = 0;  // Fortran doesn't support multiple inheritance.
+
+  if (TYPE_N_BASECLASSES (type) > 0)
+    fprintf_filtered (stream, ", extends(%s) ::", type_name_no_tag (TYPE_BASECLASS (type, i)));
+}
+
 /* Print the name of the type (or the ultimate pointer target,
    function value or array element), or the description of a
    structure or union.
@@ -360,10 +378,15 @@
     case TYPE_CODE_STRUCT:
     case TYPE_CODE_UNION:
       if (TYPE_CODE (type) == TYPE_CODE_UNION)
-	fprintfi_filtered (level, stream, "Type, C_Union :: ");
+	fprintfi_filtered (level, stream, "Type, C_Union ::");
       else
-	fprintfi_filtered (level, stream, "Type ");
-      fputs_filtered (TYPE_TAG_NAME (type), stream);
+	fprintfi_filtered (level, stream, "Type");
+
+      if (show > 0)
+	f_type_print_derivation_info (type, stream);
+
+      fprintf_filtered (stream, " %s", TYPE_TAG_NAME (type));
+
       /* According to the definition,
          we only print structure elements in case show > 0.  */
       if (show > 0)
diff --git a/gdb/testsuite/gdb.fortran/oop_extend_type.exp b/gdb/testsuite/gdb.fortran/oop_extend_type.exp
index ca27319..6c4867c 100755
--- a/gdb/testsuite/gdb.fortran/oop_extend_type.exp
+++ b/gdb/testsuite/gdb.fortran/oop_extend_type.exp
@@ -49,11 +49,23 @@
 gdb_test "p wp" " = \\( point = \\( coo = \\(1, 2, 1\\) \\), angle = 100 \\)"

 

 gdb_test "whatis wp" "type = Type waypoint"

-gdb_test "ptype wp" \

-  [multi_line "type = Type waypoint" \

+set output_pass [multi_line "type = Type, extends\\(point\\) :: waypoint" \

               "    Type point :: point" \

               "    $real :: angle" \

               "End Type waypoint"]

+set output_kfail [multi_line "type = Type waypoint" \

+              "    Type point :: point" \

+              "    $real :: angle" \

+              "End Type waypoint"]

+set test "ptype wp"

+gdb_test_multiple $test %test {

+    -re "$output_pass\r\n$gdb_prompt $" {

+      pass "$test"

+    }

+    -re "$output_kfail\r\n$gdb_prompt $" {

+      kfail "gcc/49475" "$test"

+    }

+}

 set test "ptype wp%coo"

 gdb_test_multiple "$test" "$test" {

     -re "$real \\(3\\)\r\n$gdb_prompt $" {

@@ -79,11 +91,15 @@
 gdb_test "p wp_vla(1)" " = \\( point = \\( coo = \\(10, 12, 10\\) \\), angle = 101 \\)"

 

 gdb_test "whatis wp_vla" "type = Type waypoint \\(3\\)"

-gdb_test "ptype wp_vla" \

-  [multi_line "type = Type waypoint" \

-              "    Type point :: point" \

-              "    $real :: angle" \

-              "End Type waypoint \\(3\\)"]

+set test "ptype wp_vla"

+gdb_test_multiple $test %test {

+    -re "$output_pass \\(3\\)\r\n$gdb_prompt $" {

+      pass "$test"

+    }

+    -re "$output_kfail \\(3\\)\r\n$gdb_prompt $" {

+      kfail "gcc/49475" "$test"

+    }

+}

 set test "ptype wp_vla(1)%coo"

 gdb_test_multiple "$test" "$test" {

     -re "$real \\(3\\)\r\n$gdb_prompt $" {