Introduce classes for Fortran bound intrinsics

This adds class fortran_bound_1arg and fortran_bound_2arg, to
implement the Fortran lbound and ubound intrinsics.

gdb/ChangeLog
2021-03-08  Tom Tromey  <tom@tromey.com>

	* f-lang.c (fortran_bound_1arg::evaluate)
	(fortran_bound_2arg::evaluate): New methods.
	* f-exp.h (class fortran_bound_1arg, class fortran_bound_2arg):
	New.

1 files changed, 32 insertions, 0 deletions

diff --git a/gdb/f-exp.h b/gdb/f-exp.h
index b569c33..e1d351a 100644
--- a/gdb/f-exp.h
+++ b/gdb/f-exp.h
@@ -159,6 +159,38 @@ private:
 			 enum noside noside);
 };
 
+/* Single-argument form of Fortran ubound/lbound intrinsics.  */
+class fortran_bound_1arg
+  : public tuple_holding_operation<exp_opcode, operation_up>
+{
+public:
+
+  using tuple_holding_operation::tuple_holding_operation;
+
+  value *evaluate (struct type *expect_type,
+		   struct expression *exp,
+		   enum noside noside) override;
+
+  enum exp_opcode opcode () const override
+  { return std::get<0> (m_storage); }
+};
+
+/* Two-argument form of Fortran ubound/lbound intrinsics.  */
+class fortran_bound_2arg
+  : public tuple_holding_operation<exp_opcode, operation_up, operation_up>
+{
+public:
+
+  using tuple_holding_operation::tuple_holding_operation;
+
+  value *evaluate (struct type *expect_type,
+		   struct expression *exp,
+		   enum noside noside) override;
+
+  enum exp_opcode opcode () const override
+  { return std::get<0> (m_storage); }
+};
+
 } /* namespace expr */
 
 #endif /* FORTRAN_EXP_H */