* expression.h (enum exp_opcode): Add a new operator for F90

        subrange.
        * f-lang.h (enum f90_range_type): New enumeration type to identify
        F90 subrange type.
        * f-exp.y (yyparse): Add support for parsing F90 subrange and
        change substring parsing to subrange parsing.
        * parse.c (operator_length_standard): Set the operator length
        and args number for OP_F90_RANGE.
        * eval.c (evaluate_subexp_standard): Add code to evaluate F90
        array section and substring.
        (value_f90_subarray): New function to evaluate F90 array section.
        (evaluate_subexp_standard): Delete label op_f77_substr and its code
        because the logic is implemented by function value_f90_subarray now.

1 files changed, 13 insertions, 0 deletions

diff --git a/gdb/f-lang.h b/gdb/f-lang.h
index 6145cb5..ddc0e89 100644
--- a/gdb/f-lang.h
+++ b/gdb/f-lang.h
@@ -36,6 +36,19 @@ extern int f_val_print (struct type *, const gdb_byte *, int, CORE_ADDR,
 
 /* Language-specific data structures */
 
+/* In F90 subrange expression, either bound could be empty, indicating that
+   its value is by default that of the corresponding bound of the array or
+   string.  So we have four sorts of subrange in F90.  This enumeration type
+   is to identify this.  */
+   
+enum f90_range_type
+  {
+    BOTH_BOUND_DEFAULT,		/* "(:)"  */
+    LOW_BOUND_DEFAULT,		/* "(:high)"  */
+    HIGH_BOUND_DEFAULT,		/* "(low:)"  */
+    NONE_BOUND_DEFAULT		/* "(low:high)"  */
+  };
+
 struct common_entry
   {
     struct symbol *symbol;	/* The symbol node corresponding