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Introduce rust_unop_ind_operation

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This adds class rust_unop_ind_operation, which implements UNOP_IND for
Rust.  Rust requires a special case here to handle trait objects.

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

	* rust-lang.c (eval_op_rust_ind): No longer static.  Add "opcode"
	parameter.
	(rust_evaluate_subexp): Update.
	* rust-exp.h (class rust_unop_ind_operation): New.
This commit is contained in:
Tom Tromey
2021-03-08 07:27:57 -07:00
parent 6fab435953
commit 11dd3dce44
3 changed files with 35 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
gdb/ChangeLog
View File

@ -1,3 +1,10 @@
2021-03-08 Tom Tromey <tom@tromey.com>
* rust-lang.c (eval_op_rust_ind): No longer static. Add "opcode"
parameter.
(rust_evaluate_subexp): Update.
* rust-exp.h (class rust_unop_ind_operation): New.
2021-03-08 Tom Tromey <tom@tromey.com>
* rust-lang.c (eval_op_rust_complement, eval_op_rust_array): No

25
gdb/rust-exp.h
View File

@ -33,6 +33,11 @@ extern struct value *eval_op_rust_array (struct type *expect_type,
enum exp_opcode opcode,
struct value *ncopies,
struct value *elt);
extern struct value *eval_op_rust_ind (struct type *expect_type,
struct expression *exp,
enum noside noside,
enum exp_opcode opcode,
struct value *value);
namespace expr
{
@ -42,6 +47,26 @@ using rust_unop_compl_operation = unop_operation<UNOP_COMPLEMENT,
using rust_array_operation = binop_operation<OP_RUST_ARRAY,
eval_op_rust_array>;
/* The Rust indirection operation. */
class rust_unop_ind_operation
: public unop_ind_operation
{
public:
using unop_ind_operation::unop_ind_operation;
value *evaluate (struct type *expect_type,
struct expression *exp,
enum noside noside) override
{
if (noside != EVAL_NORMAL)
return unop_ind_operation::evaluate (expect_type, exp, noside);
value *arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
return eval_op_rust_ind (expect_type, exp, noside, UNOP_IND, arg1);
}
};
} /* namespace expr */
#endif /* RUST_EXP_H */

5
gdb/rust-lang.c
View File

@ -1325,9 +1325,10 @@ rust_subscript (struct type *expect_type, struct expression *exp,
/* A helper function for UNOP_IND. */
static struct value *
struct value *
eval_op_rust_ind (struct type *expect_type, struct expression *exp,
enum noside noside,
enum exp_opcode opcode,
struct value *value)
{
gdb_assert (noside == EVAL_NORMAL);
@ -1521,7 +1522,7 @@ rust_evaluate_subexp (struct type *expect_type, struct expression *exp,
++*pos;
struct value *value = evaluate_subexp (expect_type, exp, pos,
noside);
result = eval_op_rust_ind (expect_type, exp, noside, value);
result = eval_op_rust_ind (expect_type, exp, noside, op, value);
}
}
break;