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Improve Ada unchecked union type printing

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Currently, "ptype" of an Ada unchecked union may show a
compiler-generated wrapper structure in its output.  It's more
Ada-like to elide this structure, which is what this patch implements.
It turned out to be simplest to reuse a part of print_variant_clauses
for this.

As this is Ada-specific, and Joel already reviewed it internally, I am
going to check it in.
This commit is contained in:
Tom Tromey 2022-02-01 09:46:43 -07:00
parent 2b53149244
commit 480157863b
3 changed files with 42 additions and 29 deletions
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59
gdb/ada-typeprint.c
View file

@ -506,6 +506,35 @@ Huh:
return 0;
}
/* A helper for print_variant_clauses that prints the members of
VAR_TYPE. DISCR_TYPE is the type of the discriminant (or nullptr
if not available). The discriminant is contained in OUTER_TYPE.
STREAM, LEVEL, SHOW, and FLAGS are the same as for
ada_print_type. */
static void
print_variant_clauses (struct type *var_type, struct type *discr_type,
struct type *outer_type, struct ui_file *stream,
int show, int level,
const struct type_print_options *flags)
{
for (int i = 0; i < var_type->num_fields (); i += 1)
{
fprintf_filtered (stream, "\n%*swhen ", level, "");
if (print_choices (var_type, i, stream, discr_type))
{
if (print_record_field_types (var_type->field (i).type (),
outer_type, stream, show, level,
flags)
<= 0)
fprintf_filtered (stream, " null;");
}
else
print_selected_record_field_types (var_type, outer_type, i, i,
stream, show, level, flags);
}
}
/* Assuming that field FIELD_NUM of TYPE represents variants whose
discriminant is contained in OUTER_TYPE, print its components on STREAM.
LEVEL is the recursion (indentation) level, in case any of the fields
@ -520,7 +549,6 @@ print_variant_clauses (struct type *type, int field_num,
int show, int level,
const struct type_print_options *flags)
{
int i;
struct type *var_type, *par_type;
struct type *discr_type;
@ -538,21 +566,8 @@ print_variant_clauses (struct type *type, int field_num,
if (par_type != NULL)
var_type = par_type;
for (i = 0; i < var_type->num_fields (); i += 1)
{
fprintf_filtered (stream, "\n%*swhen ", level + 4, "");
if (print_choices (var_type, i, stream, discr_type))
{
if (print_record_field_types (var_type->field (i).type (),
outer_type, stream, show, level + 4,
flags)
<= 0)
fprintf_filtered (stream, " null;");
}
else
print_selected_record_field_types (var_type, outer_type, i, i,
stream, show, level + 4, flags);
}
print_variant_clauses (var_type, discr_type, outer_type, stream, show,
level + 4, flags);
}
/* Assuming that field FIELD_NUM of TYPE is a variant part whose
@ -842,19 +857,9 @@ print_unchecked_union_type (struct type *type, struct ui_file *stream,
fprintf_filtered (stream, "record (?) is null; end record");
else
{
int i;
fprintf_filtered (stream, "record (?) is\n%*scase ? is", level + 4, "");
for (i = 0; i < type->num_fields (); i += 1)
{
fprintf_filtered (stream, "\n%*swhen ? =>\n%*s", level + 8, "",
level + 12, "");
ada_print_type (type->field (i).type (),
type->field (i).name (),
stream, show - 1, level + 12, flags);
fprintf_filtered (stream, ";");
}
print_variant_clauses (type, nullptr, type, stream, show, level + 8, flags);
fprintf_filtered (stream, "\n%*send case;\n%*send record",
level + 4, "", level, "");