gdb/fortran: Add new function to evaluate Fortran expressions

This is an initial restructure, it adds a new function in which
Fortran specific expressions can be evaluated.  No Fortran specific
expressions are added with this commit though, so for now, the new
function just forwards all expressions to the default expression
handler, as such, there should be no user visible changes after this
commit.  However, the new function will be useful in later commits.

gdb/ChangeLog:

	* f-lang.c (evaluate_subexp_f): New function.
	(exp_descriptor_f): New global.
	(f_language_defn): Use exp_descriptor_f instead of
	exp_descriptor_standard.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 61c5663..a632de6 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,12 @@
 2019-03-06  Andrew Burgess  <andrew.burgess@embecosm.com>
 
+       * f-lang.c (evaluate_subexp_f): New function.
+       (exp_descriptor_f): New global.
+       (f_language_defn): Use exp_descriptor_f instead of
+       exp_descriptor_standard.
+
+2019-03-06  Andrew Burgess  <andrew.burgess@embecosm.com>
+
        * f-exp.y (struct token): Add comments.
        (dot_ops): Remove uppercase versions and the end marker.
        (f77_keywords): Likewise.

diff --git a/gdb/f-lang.c b/gdb/f-lang.c
index 6eb9b23..5beb46c 100644 (file)
--- a/gdb/f-lang.c
+++ b/gdb/f-lang.c
@@ -239,6 +239,15 @@ f_collect_symbol_completion_matches (completion_tracker &tracker,
                                                      text, word, ":", code);
 }
 
+/* Special expression evaluation cases for Fortran.  */
+struct value *
+evaluate_subexp_f (struct type *expect_type, struct expression *exp,
+                  int *pos, enum noside noside)
+{
+  /* Currently no special handling is required. */
+  return evaluate_subexp_standard (expect_type, exp, pos, noside);
+}
+
 static const char *f_extensions[] =
 {
   ".f", ".F", ".for", ".FOR", ".ftn", ".FTN", ".fpp", ".FPP",
@@ -246,6 +255,17 @@ static const char *f_extensions[] =
   NULL
 };
 
+/* Expression processing for Fortran.  */
+static const struct exp_descriptor exp_descriptor_f =
+{
+  print_subexp_standard,
+  operator_length_standard,
+  operator_check_standard,
+  op_name_standard,
+  dump_subexp_body_standard,
+  evaluate_subexp_f
+};
+
 extern const struct language_defn f_language_defn =
 {
   "fortran",
@@ -256,7 +276,7 @@ extern const struct language_defn f_language_defn =
   array_column_major,
   macro_expansion_no,
   f_extensions,
-  &exp_descriptor_standard,
+  &exp_descriptor_f,
   f_parse,                     /* parser */
   null_post_parser,
   f_printchar,                 /* Print character constant */