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C: add fixit hint to misspelled field names 

gcc/c/ChangeLog:
	* c-parser.c (c_parser_postfix_expression): In __builtin_offsetof
	and structure element reference, capture the location of the
	element name token and pass it to build_component_ref.
	(c_parser_postfix_expression_after_primary): Likewise for
	structure element dereference.
	(c_parser_omp_variable_list): Likewise for
	OMP_CLAUSE_{_CACHE, MAP, FROM, TO},
	* c-tree.h (build_component_ref): Add location_t param.
	* c-typeck.c (build_component_ref): Add location_t param
	COMPONENT_LOC.  Use it, if available, when issuing hints about
	mispelled member names to provide a fixit replacement hint.

gcc/objc/ChangeLog:
	* objc-act.c (objc_build_component_ref): Update call
	to build_component_ref for added param, passing UNKNOWN_LOCATION.

gcc/testsuite/ChangeLog:
	* gcc.dg/spellcheck-fields-2.c: New test case.

From-SVN: r237176
This commit is contained in:
David Malcolm 2016-06-07 15:04:22 +00:00 committed by David Malcolm
parent 0f471dc3e8
commit 6ffd47b70a
8 changed files with 91 additions and 16 deletions
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14
gcc/c/ChangeLog
View File

@ -1,3 +1,17 @@
2016-06-07 David Malcolm <dmalcolm@redhat.com>
* c-parser.c (c_parser_postfix_expression): In __builtin_offsetof
and structure element reference, capture the location of the
element name token and pass it to build_component_ref.
(c_parser_postfix_expression_after_primary): Likewise for
structure element dereference.
(c_parser_omp_variable_list): Likewise for
OMP_CLAUSE_{_CACHE, MAP, FROM, TO},
* c-tree.h (build_component_ref): Add location_t param.
* c-typeck.c (build_component_ref): Add location_t param
COMPONENT_LOC. Use it, if available, when issuing hints about
mispelled member names to provide a fixit replacement hint.
2016-06-06 Marek Polacek <polacek@redhat.com>
PR c/71362

34
gcc/c/c-parser.c
View File

@ -7708,8 +7708,9 @@ c_parser_postfix_expression (c_parser *parser)
accept sub structure and sub array references. */
if (c_parser_next_token_is (parser, CPP_NAME))
{
c_token *comp_tok = c_parser_peek_token (parser);
offsetof_ref = build_component_ref
(loc, offsetof_ref, c_parser_peek_token (parser)->value);
(loc, offsetof_ref, comp_tok->value, comp_tok->location);
c_parser_consume_token (parser);
while (c_parser_next_token_is (parser, CPP_DOT)
|| c_parser_next_token_is (parser,
@ -7735,9 +7736,10 @@ c_parser_postfix_expression (c_parser *parser)
c_parser_error (parser, "expected identifier");
break;
}
c_token *comp_tok = c_parser_peek_token (parser);
offsetof_ref = build_component_ref
(loc, offsetof_ref,
c_parser_peek_token (parser)->value);
(loc, offsetof_ref, comp_tok->value,
comp_tok->location);
c_parser_consume_token (parser);
}
else
@ -8214,7 +8216,7 @@ c_parser_postfix_expression_after_primary (c_parser *parser,
{
struct c_expr orig_expr;
tree ident, idx;
location_t sizeof_arg_loc[3];
location_t sizeof_arg_loc[3], comp_loc;
tree sizeof_arg[3];
unsigned int literal_zero_mask;
unsigned int i;
@ -8328,7 +8330,11 @@ c_parser_postfix_expression_after_primary (c_parser *parser,
c_parser_consume_token (parser);
expr = default_function_array_conversion (expr_loc, expr);
if (c_parser_next_token_is (parser, CPP_NAME))
ident = c_parser_peek_token (parser)->value;
{
c_token *comp_tok = c_parser_peek_token (parser);
ident = comp_tok->value;
comp_loc = comp_tok->location;
}
else
{
c_parser_error (parser, "expected identifier");
@ -8340,7 +8346,8 @@ c_parser_postfix_expression_after_primary (c_parser *parser,
start = expr.get_start ();
finish = c_parser_peek_token (parser)->get_finish ();
c_parser_consume_token (parser);
expr.value = build_component_ref (op_loc, expr.value, ident);
expr.value = build_component_ref (op_loc, expr.value, ident,
comp_loc);
set_c_expr_source_range (&expr, start, finish);
expr.original_code = ERROR_MARK;
if (TREE_CODE (expr.value) != COMPONENT_REF)
@ -8360,7 +8367,11 @@ c_parser_postfix_expression_after_primary (c_parser *parser,
c_parser_consume_token (parser);
expr = convert_lvalue_to_rvalue (expr_loc, expr, true, false);
if (c_parser_next_token_is (parser, CPP_NAME))
ident = c_parser_peek_token (parser)->value;
{
c_token *comp_tok = c_parser_peek_token (parser);
ident = comp_tok->value;
comp_loc = comp_tok->location;
}
else
{
c_parser_error (parser, "expected identifier");
@ -8376,7 +8387,7 @@ c_parser_postfix_expression_after_primary (c_parser *parser,
build_indirect_ref (op_loc,
expr.value,
RO_ARROW),
ident);
ident, comp_loc);
set_c_expr_source_range (&expr, start, finish);
expr.original_code = ERROR_MARK;
if (TREE_CODE (expr.value) != COMPONENT_REF)
@ -10622,9 +10633,12 @@ c_parser_omp_variable_list (c_parser *parser,
t = error_mark_node;
break;
}
tree ident = c_parser_peek_token (parser)->value;
c_token *comp_tok = c_parser_peek_token (parser);
tree ident = comp_tok->value;
location_t comp_loc = comp_tok->location;
c_parser_consume_token (parser);
t = build_component_ref (op_loc, t, ident);
t = build_component_ref (op_loc, t, ident, comp_loc);
}
/* FALLTHROUGH */
case OMP_CLAUSE_DEPEND:

2
gcc/c/c-tree.h
View File

@ -614,7 +614,7 @@ extern struct c_expr convert_lvalue_to_rvalue (location_t, struct c_expr,
bool, bool);
extern void mark_exp_read (tree);
extern tree composite_type (tree, tree);
extern tree build_component_ref (location_t, tree, tree);
extern tree build_component_ref (location_t, tree, tree, location_t);
extern tree build_array_ref (location_t, tree, tree);
extern tree build_external_ref (location_t, tree, int, tree *);
extern void pop_maybe_used (bool);

26
gcc/c/c-typeck.c
View File

@ -2329,10 +2329,12 @@ should_suggest_deref_p (tree datum_type)
/* Make an expression to refer to the COMPONENT field of structure or
union value DATUM. COMPONENT is an IDENTIFIER_NODE. LOC is the
location of the COMPONENT_REF. */
location of the COMPONENT_REF. COMPONENT_LOC is the location
of COMPONENT. */
tree
build_component_ref (location_t loc, tree datum, tree component)
build_component_ref (location_t loc, tree datum, tree component,
location_t component_loc)
{
tree type = TREE_TYPE (datum);
enum tree_code code = TREE_CODE (type);
@ -2364,8 +2366,24 @@ build_component_ref (location_t loc, tree datum, tree component)
{
tree guessed_id = lookup_field_fuzzy (type, component);
if (guessed_id)
error_at (loc, "%qT has no member named %qE; did you mean %qE?",
type, component, guessed_id);
{
/* Attempt to provide a fixit replacement hint, if
we have a valid range for the component. */
location_t reported_loc
= (component_loc != UNKNOWN_LOCATION) ? component_loc : loc;
rich_location rich_loc (line_table, reported_loc);
if (component_loc != UNKNOWN_LOCATION)
{
source_range component_range =
get_range_from_loc (line_table, component_loc);
rich_loc.add_fixit_replace (component_range,
IDENTIFIER_POINTER (guessed_id));
}
error_at_rich_loc
(&rich_loc,
"%qT has no member named %qE; did you mean %qE?",
type, component, guessed_id);
}
else
error_at (loc, "%qT has no member named %qE", type, component);
return error_mark_node;

5
gcc/objc/ChangeLog
View File

@ -1,3 +1,8 @@
2016-06-07 David Malcolm <dmalcolm@redhat.com>
* objc-act.c (objc_build_component_ref): Update call
to build_component_ref for added param, passing UNKNOWN_LOCATION.
2016-04-18 Michael Matz <matz@suse.de>
* objc-act.c (objc_build_struct): Use SET_DECL_ALIGN.

3
gcc/objc/objc-act.c
View File

@ -2654,7 +2654,8 @@ objc_build_component_ref (tree datum, tree component)
return finish_class_member_access_expr (datum, component, false,
tf_warning_or_error);
#else
return build_component_ref (input_location, datum, component);
return build_component_ref (input_location, datum, component,
UNKNOWN_LOCATION);
#endif
}

4
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,7 @@
2016-06-07 David Malcolm <dmalcolm@redhat.com>
* gcc.dg/spellcheck-fields-2.c: New test case.
2016-06-07 Richard Biener <rguenther@suse.de>
PR c/61564

19
gcc/testsuite/gcc.dg/spellcheck-fields-2.c Normal file
View File

@ -0,0 +1,19 @@
/* { dg-options "-fdiagnostics-show-caret" } */
union u
{
int color;
int shape;
};
int test (union u *ptr)
{
return ptr->colour; /* { dg-error "did you mean .color.?" } */
}
/* Verify that we get an underline and a fixit hint. */
/* { dg-begin-multiline-output "" }
return ptr->colour;
^~~~~~
color
{ dg-end-multiline-output "" } */