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authorTom Tromey <tom@tromey.com>2021-03-08 07:27:57 -0700
committerTom Tromey <tom@tromey.com>2021-03-08 07:28:27 -0700
commit5947d337d6061b884073a3a684aff2825c4a05f9 (patch)
tree672e421f087f5c858c7b9bfc0cabca22066f4c51 /gdb/rust-lang.c
parente4407a202d31a6873ea240b13125bf1ae8d20401 (diff)
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Introduce rust_aggregate_operation
This adds class rust_aggregate_operation, which implements OP_AGGREGATE for Rust. gdb/ChangeLog 2021-03-08 Tom Tromey <tom@tromey.com> * rust-lang.c (rust_aggregate_operation::evaluate): New method. * rust-exp.h (class rust_aggregate_operation): New.
Diffstat (limited to 'gdb/rust-lang.c')
-rw-r--r--gdb/rust-lang.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/gdb/rust-lang.c b/gdb/rust-lang.c
index 1373de9..3604535 100644
--- a/gdb/rust-lang.c
+++ b/gdb/rust-lang.c
@@ -1700,6 +1700,64 @@ rust_evaluate_subexp (struct type *expect_type, struct expression *exp,
return result;
}
+namespace expr
+{
+
+value *
+rust_aggregate_operation::evaluate (struct type *expect_type,
+ struct expression *exp,
+ enum noside noside)
+{
+ struct type *type = std::get<0> (m_storage);
+ CORE_ADDR addr = 0;
+ struct value *addrval = NULL;
+ value *result;
+
+ if (noside == EVAL_NORMAL)
+ {
+ addrval = value_allocate_space_in_inferior (TYPE_LENGTH (type));
+ addr = value_as_long (addrval);
+ result = value_at_lazy (type, addr);
+ }
+
+ if (std::get<1> (m_storage) != nullptr)
+ {
+ struct value *init = std::get<1> (m_storage)->evaluate (nullptr, exp,
+ noside);
+
+ if (noside == EVAL_NORMAL)
+ {
+ /* This isn't quite right but will do for the time
+ being, seeing that we can't implement the Copy
+ trait anyway. */
+ value_assign (result, init);
+ }
+ }
+
+ for (const auto &item : std::get<2> (m_storage))
+ {
+ value *val = item.second->evaluate (nullptr, exp, noside);
+ if (noside == EVAL_NORMAL)
+ {
+ const char *fieldname = item.first.c_str ();
+ value *field = value_struct_elt (&result, nullptr, fieldname,
+ nullptr, "structure");
+ value_assign (field, val);
+ }
+ }
+
+ if (noside == EVAL_SKIP)
+ result = value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1);
+ else if (noside == EVAL_AVOID_SIDE_EFFECTS)
+ result = allocate_value (type);
+ else
+ result = value_at_lazy (type, addr);
+
+ return result;
+}
+
+}
+
/* operator_length implementation for Rust. */
static void