using string_operation::string_operation;
+ /* Return the underlying string. */
+ const char *get_name () const
+ {
+ return std::get<0> (m_storage).c_str ();
+ }
+
value *evaluate (struct type *expect_type,
struct expression *exp,
enum noside noside) override;
{ return OP_FUNCALL; }
};
+/* An Ada assignment operation. */
+class ada_assign_operation
+ : public assign_operation
+{
+public:
+
+ using assign_operation::assign_operation;
+
+ value *evaluate (struct type *expect_type,
+ struct expression *exp,
+ enum noside noside) override;
+
+ enum exp_opcode opcode () const override
+ { return BINOP_ASSIGN; }
+};
+
+/* This abstract class represents a single component in an Ada
+ aggregate assignment. */
+class ada_component
+{
+public:
+
+ /* Assign to LHS, which is part of CONTAINER. EXP is the expression
+ being evaluated. INDICES, LOW, and HIGH indicate which
+ sub-components have already been assigned; INDICES should be
+ updated by this call. */
+ virtual void assign (struct value *container,
+ struct value *lhs, struct expression *exp,
+ std::vector<LONGEST> &indices,
+ LONGEST low, LONGEST high) = 0;
+
+ /* Same as operation::uses_objfile. */
+ virtual bool uses_objfile (struct objfile *objfile) = 0;
+
+ /* Same as operation::dump. */
+ virtual void dump (ui_file *stream, int depth) = 0;
+
+ virtual ~ada_component () = default;
+
+protected:
+
+ ada_component () = default;
+ DISABLE_COPY_AND_ASSIGN (ada_component);
+};
+
+/* Unique pointer specialization for Ada assignment components. */
+typedef std::unique_ptr<ada_component> ada_component_up;
+
+/* An operation that holds a single component. */
+class ada_aggregate_operation
+ : public tuple_holding_operation<ada_component_up>
+{
+public:
+
+ using tuple_holding_operation::tuple_holding_operation;
+
+ /* Assuming that LHS represents an lvalue having a record or array
+ type, evaluate an assignment of this aggregate's value to LHS.
+ CONTAINER is an lvalue containing LHS (possibly LHS itself).
+ Does not modify the inferior's memory, nor does it modify the
+ contents of LHS (unless == CONTAINER). */
+
+ void assign_aggregate (struct value *container,
+ struct value *lhs,
+ struct expression *exp);
+
+ value *evaluate (struct type *expect_type,
+ struct expression *exp,
+ enum noside noside) override
+ {
+ error (_("Aggregates only allowed on the right of an assignment"));
+ }
+
+ enum exp_opcode opcode () const override
+ { return OP_AGGREGATE; }
+};
+
+/* A component holding a vector of other components to assign. */
+class ada_aggregate_component : public ada_component
+{
+public:
+
+ explicit ada_aggregate_component (std::vector<ada_component_up> &&components)
+ : m_components (std::move (components))
+ {
+ }
+
+ void assign (struct value *container,
+ struct value *lhs, struct expression *exp,
+ std::vector<LONGEST> &indices,
+ LONGEST low, LONGEST high) override;
+
+ bool uses_objfile (struct objfile *objfile) override;
+
+ void dump (ui_file *stream, int depth) override;
+
+private:
+
+ std::vector<ada_component_up> m_components;
+};
+
+/* A component that assigns according to a provided index (which is
+ relative to the "low" value). */
+class ada_positional_component : public ada_component
+{
+public:
+
+ ada_positional_component (int index, operation_up &&op)
+ : m_index (index),
+ m_op (std::move (op))
+ {
+ }
+
+ void assign (struct value *container,
+ struct value *lhs, struct expression *exp,
+ std::vector<LONGEST> &indices,
+ LONGEST low, LONGEST high) override;
+
+ bool uses_objfile (struct objfile *objfile) override;
+
+ void dump (ui_file *stream, int depth) override;
+
+private:
+
+ int m_index;
+ operation_up m_op;
+};
+
+/* A component which handles an "others" clause. */
+class ada_others_component : public ada_component
+{
+public:
+
+ explicit ada_others_component (operation_up &&op)
+ : m_op (std::move (op))
+ {
+ }
+
+ void assign (struct value *container,
+ struct value *lhs, struct expression *exp,
+ std::vector<LONGEST> &indices,
+ LONGEST low, LONGEST high) override;
+
+ bool uses_objfile (struct objfile *objfile) override;
+
+ void dump (ui_file *stream, int depth) override;
+
+private:
+
+ operation_up m_op;
+};
+
+/* An interface that represents an association that is used in
+ aggregate assignment. */
+class ada_association
+{
+public:
+
+ /* Like ada_component::assign, but takes an operation as a
+ parameter. The operation is evaluated and then assigned into LHS
+ according to the rules of the concrete implementation. */
+ virtual void assign (struct value *container,
+ struct value *lhs,
+ struct expression *exp,
+ std::vector<LONGEST> &indices,
+ LONGEST low, LONGEST high,
+ operation_up &op) = 0;
+
+ /* Same as operation::uses_objfile. */
+ virtual bool uses_objfile (struct objfile *objfile) = 0;
+
+ /* Same as operation::dump. */
+ virtual void dump (ui_file *stream, int depth) = 0;
+
+ virtual ~ada_association () = default;
+
+protected:
+
+ ada_association () = default;
+ DISABLE_COPY_AND_ASSIGN (ada_association);
+};
+
+/* Unique pointer specialization for Ada assignment associations. */
+typedef std::unique_ptr<ada_association> ada_association_up;
+
+/* A component that holds a vector of associations and an operation.
+ The operation is re-evaluated for each choice. */
+class ada_choices_component : public ada_component
+{
+public:
+
+ explicit ada_choices_component (operation_up &&op)
+ : m_op (std::move (op))
+ {
+ }
+
+ /* Set the vector of associations. This is done separately from the
+ constructor because it was simpler for the implementation of the
+ parser. */
+ void set_associations (std::vector<ada_association_up> &&assoc)
+ {
+ m_assocs = std::move (assoc);
+ }
+
+ void assign (struct value *container,
+ struct value *lhs, struct expression *exp,
+ std::vector<LONGEST> &indices,
+ LONGEST low, LONGEST high) override;
+
+ bool uses_objfile (struct objfile *objfile) override;
+
+ void dump (ui_file *stream, int depth) override;
+
+private:
+
+ std::vector<ada_association_up> m_assocs;
+ operation_up m_op;
+};
+
+/* An association that uses a discrete range. */
+class ada_discrete_range_association : public ada_association
+{
+public:
+
+ ada_discrete_range_association (operation_up &&low, operation_up &&high)
+ : m_low (std::move (low)),
+ m_high (std::move (high))
+ {
+ }
+
+ void assign (struct value *container,
+ struct value *lhs, struct expression *exp,
+ std::vector<LONGEST> &indices,
+ LONGEST low, LONGEST high,
+ operation_up &op) override;
+
+ bool uses_objfile (struct objfile *objfile) override;
+
+ void dump (ui_file *stream, int depth) override;
+
+private:
+
+ operation_up m_low;
+ operation_up m_high;
+};
+
+/* An association that uses a name. The name may be an expression
+ that evaluates to an integer (for arrays), or an Ada string or
+ variable value operation. */
+class ada_name_association : public ada_association
+{
+public:
+
+ explicit ada_name_association (operation_up val)
+ : m_val (std::move (val))
+ {
+ }
+
+ void assign (struct value *container,
+ struct value *lhs, struct expression *exp,
+ std::vector<LONGEST> &indices,
+ LONGEST low, LONGEST high,
+ operation_up &op) override;
+
+ bool uses_objfile (struct objfile *objfile) override;
+
+ void dump (ui_file *stream, int depth) override;
+
+private:
+
+ operation_up m_val;
+};
+
} /* namespace expr */
#endif /* ADA_EXP_H */
ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP);
}
+namespace expr
+{
+
+bool
+check_objfile (const std::unique_ptr<ada_component> &comp,
+ struct objfile *objfile)
+{
+ return comp->uses_objfile (objfile);
+}
+
+/* Assign the result of evaluating ARG starting at *POS to the INDEXth
+ component of LHS (a simple array or a record). Does not modify the
+ inferior's memory, nor does it modify LHS (unless LHS ==
+ CONTAINER). */
+
+static void
+assign_component (struct value *container, struct value *lhs, LONGEST index,
+ struct expression *exp, operation_up &arg)
+{
+ scoped_value_mark mark;
+
+ struct value *elt;
+ struct type *lhs_type = check_typedef (value_type (lhs));
+
+ if (lhs_type->code () == TYPE_CODE_ARRAY)
+ {
+ struct type *index_type = builtin_type (exp->gdbarch)->builtin_int;
+ struct value *index_val = value_from_longest (index_type, index);
+
+ elt = unwrap_value (ada_value_subscript (lhs, 1, &index_val));
+ }
+ else
+ {
+ elt = ada_index_struct_field (index, lhs, 0, value_type (lhs));
+ elt = ada_to_fixed_value (elt);
+ }
+
+ ada_aggregate_operation *ag_op
+ = dynamic_cast<ada_aggregate_operation *> (arg.get ());
+ if (ag_op != nullptr)
+ ag_op->assign_aggregate (container, elt, exp);
+ else
+ value_assign_to_component (container, elt,
+ arg->evaluate (nullptr, exp,
+ EVAL_NORMAL));
+}
+
+bool
+ada_aggregate_component::uses_objfile (struct objfile *objfile)
+{
+ for (const auto &item : m_components)
+ if (item->uses_objfile (objfile))
+ return true;
+ return false;
+}
+
+void
+ada_aggregate_component::dump (ui_file *stream, int depth)
+{
+ fprintf_filtered (stream, _("%*sAggregate\n"), depth, "");
+ for (const auto &item : m_components)
+ item->dump (stream, depth + 1);
+}
+
+void
+ada_aggregate_component::assign (struct value *container,
+ struct value *lhs, struct expression *exp,
+ std::vector<LONGEST> &indices,
+ LONGEST low, LONGEST high)
+{
+ for (auto &item : m_components)
+ item->assign (container, lhs, exp, indices, low, high);
+}
+
+void
+ada_aggregate_operation::assign_aggregate (struct value *container,
+ struct value *lhs,
+ struct expression *exp)
+{
+ struct type *lhs_type;
+ LONGEST low_index, high_index;
+
+ container = ada_coerce_ref (container);
+ if (ada_is_direct_array_type (value_type (container)))
+ container = ada_coerce_to_simple_array (container);
+ lhs = ada_coerce_ref (lhs);
+ if (!deprecated_value_modifiable (lhs))
+ error (_("Left operand of assignment is not a modifiable lvalue."));
+
+ lhs_type = check_typedef (value_type (lhs));
+ if (ada_is_direct_array_type (lhs_type))
+ {
+ lhs = ada_coerce_to_simple_array (lhs);
+ lhs_type = check_typedef (value_type (lhs));
+ low_index = lhs_type->bounds ()->low.const_val ();
+ high_index = lhs_type->bounds ()->high.const_val ();
+ }
+ else if (lhs_type->code () == TYPE_CODE_STRUCT)
+ {
+ low_index = 0;
+ high_index = num_visible_fields (lhs_type) - 1;
+ }
+ else
+ error (_("Left-hand side must be array or record."));
+
+ std::vector<LONGEST> indices (4);
+ indices[0] = indices[1] = low_index - 1;
+ indices[2] = indices[3] = high_index + 1;
+
+ std::get<0> (m_storage)->assign (container, lhs, exp, indices,
+ low_index, high_index);
+}
+
+bool
+ada_positional_component::uses_objfile (struct objfile *objfile)
+{
+ return m_op->uses_objfile (objfile);
+}
+
+void
+ada_positional_component::dump (ui_file *stream, int depth)
+{
+ fprintf_filtered (stream, _("%*sPositional, index = %d\n"),
+ depth, "", m_index);
+ m_op->dump (stream, depth + 1);
+}
+
+/* Assign into the component of LHS indexed by the OP_POSITIONAL
+ construct, given that the positions are relative to lower bound
+ LOW, where HIGH is the upper bound. Record the position in
+ INDICES. CONTAINER is as for assign_aggregate. */
+void
+ada_positional_component::assign (struct value *container,
+ struct value *lhs, struct expression *exp,
+ std::vector<LONGEST> &indices,
+ LONGEST low, LONGEST high)
+{
+ LONGEST ind = m_index + low;
+
+ if (ind - 1 == high)
+ warning (_("Extra components in aggregate ignored."));
+ if (ind <= high)
+ {
+ add_component_interval (ind, ind, indices);
+ assign_component (container, lhs, ind, exp, m_op);
+ }
+}
+
+bool
+ada_discrete_range_association::uses_objfile (struct objfile *objfile)
+{
+ return m_low->uses_objfile (objfile) || m_high->uses_objfile (objfile);
+}
+
+void
+ada_discrete_range_association::dump (ui_file *stream, int depth)
+{
+ fprintf_filtered (stream, _("%*sDiscrete range:\n"), depth, "");
+ m_low->dump (stream, depth + 1);
+ m_high->dump (stream, depth + 1);
+}
+
+void
+ada_discrete_range_association::assign (struct value *container,
+ struct value *lhs,
+ struct expression *exp,
+ std::vector<LONGEST> &indices,
+ LONGEST low, LONGEST high,
+ operation_up &op)
+{
+ LONGEST lower = value_as_long (m_low->evaluate (nullptr, exp, EVAL_NORMAL));
+ LONGEST upper = value_as_long (m_high->evaluate (nullptr, exp, EVAL_NORMAL));
+
+ if (lower <= upper && (lower < low || upper > high))
+ error (_("Index in component association out of bounds."));
+
+ add_component_interval (lower, upper, indices);
+ while (lower <= upper)
+ {
+ assign_component (container, lhs, lower, exp, op);
+ lower += 1;
+ }
+}
+
+bool
+ada_name_association::uses_objfile (struct objfile *objfile)
+{
+ return m_val->uses_objfile (objfile);
+}
+
+void
+ada_name_association::dump (ui_file *stream, int depth)
+{
+ fprintf_filtered (stream, _("%*sName:\n"), depth, "");
+ m_val->dump (stream, depth + 1);
+}
+
+void
+ada_name_association::assign (struct value *container,
+ struct value *lhs,
+ struct expression *exp,
+ std::vector<LONGEST> &indices,
+ LONGEST low, LONGEST high,
+ operation_up &op)
+{
+ int index;
+
+ if (ada_is_direct_array_type (value_type (lhs)))
+ index = longest_to_int (value_as_long (m_val->evaluate (nullptr, exp,
+ EVAL_NORMAL)));
+ else
+ {
+ ada_string_operation *strop
+ = dynamic_cast<ada_string_operation *> (m_val.get ());
+
+ const char *name;
+ if (strop != nullptr)
+ name = strop->get_name ();
+ else
+ {
+ ada_var_value_operation *vvo
+ = dynamic_cast<ada_var_value_operation *> (m_val.get ());
+ if (vvo != nullptr)
+ error (_("Invalid record component association."));
+ name = vvo->get_symbol ()->natural_name ();
+ }
+
+ index = 0;
+ if (! find_struct_field (name, value_type (lhs), 0,
+ NULL, NULL, NULL, NULL, &index))
+ error (_("Unknown component name: %s."), name);
+ }
+
+ add_component_interval (index, index, indices);
+ assign_component (container, lhs, index, exp, op);
+}
+
+bool
+ada_choices_component::uses_objfile (struct objfile *objfile)
+{
+ if (m_op->uses_objfile (objfile))
+ return true;
+ for (const auto &item : m_assocs)
+ if (item->uses_objfile (objfile))
+ return true;
+ return false;
+}
+
+void
+ada_choices_component::dump (ui_file *stream, int depth)
+{
+ fprintf_filtered (stream, _("%*sChoices:\n"), depth, "");
+ m_op->dump (stream, depth + 1);
+ for (const auto &item : m_assocs)
+ item->dump (stream, depth + 1);
+}
+
+/* Assign into the components of LHS indexed by the OP_CHOICES
+ construct at *POS, updating *POS past the construct, given that
+ the allowable indices are LOW..HIGH. Record the indices assigned
+ to in INDICES. CONTAINER is as for assign_aggregate. */
+void
+ada_choices_component::assign (struct value *container,
+ struct value *lhs, struct expression *exp,
+ std::vector<LONGEST> &indices,
+ LONGEST low, LONGEST high)
+{
+ for (auto &item : m_assocs)
+ item->assign (container, lhs, exp, indices, low, high, m_op);
+}
+
+bool
+ada_others_component::uses_objfile (struct objfile *objfile)
+{
+ return m_op->uses_objfile (objfile);
+}
+
+void
+ada_others_component::dump (ui_file *stream, int depth)
+{
+ fprintf_filtered (stream, _("%*sOthers:\n"), depth, "");
+ m_op->dump (stream, depth + 1);
+}
+
+/* Assign the value of the expression in the OP_OTHERS construct in
+ EXP at *POS into the components of LHS indexed from LOW .. HIGH that
+ have not been previously assigned. The index intervals already assigned
+ are in INDICES. CONTAINER is as for assign_aggregate. */
+void
+ada_others_component::assign (struct value *container,
+ struct value *lhs, struct expression *exp,
+ std::vector<LONGEST> &indices,
+ LONGEST low, LONGEST high)
+{
+ int num_indices = indices.size ();
+ for (int i = 0; i < num_indices - 2; i += 2)
+ {
+ for (LONGEST ind = indices[i + 1] + 1; ind < indices[i + 2]; ind += 1)
+ assign_component (container, lhs, ind, exp, m_op);
+ }
+}
+
+struct value *
+ada_assign_operation::evaluate (struct type *expect_type,
+ struct expression *exp,
+ enum noside noside)
+{
+ value *arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
+
+ ada_aggregate_operation *ag_op
+ = dynamic_cast<ada_aggregate_operation *> (std::get<1> (m_storage).get ());
+ if (ag_op != nullptr)
+ {
+ if (noside != EVAL_NORMAL)
+ return arg1;
+
+ ag_op->assign_aggregate (arg1, arg1, exp);
+ return ada_value_assign (arg1, arg1);
+ }
+ /* Force the evaluation of the rhs ARG2 to the type of the lhs ARG1,
+ except if the lhs of our assignment is a convenience variable.
+ In the case of assigning to a convenience variable, the lhs
+ should be exactly the result of the evaluation of the rhs. */
+ struct type *type = value_type (arg1);
+ if (VALUE_LVAL (arg1) == lval_internalvar)
+ type = NULL;
+ value *arg2 = std::get<1> (m_storage)->evaluate (type, exp, noside);
+ if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
+ return arg1;
+ if (VALUE_LVAL (arg1) == lval_internalvar)
+ {
+ /* Nothing. */
+ }
+ else
+ arg2 = coerce_for_assign (value_type (arg1), arg2);
+ return ada_value_assign (arg1, arg2);
+}
+
+} /* namespace expr */
+
/* Add the interval [LOW .. HIGH] to the sorted set of intervals
[ INDICES[0] .. INDICES[1] ],... The resulting intervals do not
overlap. */
projects / thirdparty / binutils-gdb.git / commitdiff
