diff options
| author | dmalcolm <dmalcolm@138bc75d-0d04-0410-961f-82ee72b054a4> | 2017-06-20 10:40:38 +0000 |
|---|---|---|
| committer | dmalcolm <dmalcolm@138bc75d-0d04-0410-961f-82ee72b054a4> | 2017-06-20 10:40:38 +0000 |
| commit | c2403f36287ffd90629aa67b204f35844fc237fb (patch) | |
| tree | fe86d10819506cdb8f17e6172d8ed766eb12c2fa /libcpp | |
| parent | 199666f5a9eb29a00514ce8277c7b122e3297dd1 (diff) | |
Prevent fix-it hints from affecting more than one line
Attempts to apply a removal or replacement fix-it hint to a source
range that covers multiple lines currently lead to nonsensical
results from the printing code in diagnostic-show-locus.c.
We were already filtering them out in edit-context.c (leading
to -fdiagnostics-generate-patch not generating any output for
the whole TU).
Reject attempts to add such fix-it hints within rich_location,
fixing the diagnostic-show-locus.c issue.
gcc/ChangeLog:
* diagnostic-show-locus.c
(selftest::test_fixit_deletion_affecting_newline): New function.
(selftest::diagnostic_show_locus_c_tests): Call it.
libcpp/ChangeLog:
* include/line-map.h (class rich_location): Document that attempts
to delete or replace a range *affecting* multiple lines will fail.
* line-map.c (rich_location::maybe_add_fixit): Implement this
restriction.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@249403 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libcpp')
| -rw-r--r-- | libcpp/ChangeLog | 7 | ||||
| -rw-r--r-- | libcpp/include/line-map.h | 2 | ||||
| -rw-r--r-- | libcpp/line-map.c | 21 |
3 files changed, 28 insertions, 2 deletions
diff --git a/libcpp/ChangeLog b/libcpp/ChangeLog index 13a33c302f6..9665f6e16c9 100644 --- a/libcpp/ChangeLog +++ b/libcpp/ChangeLog @@ -1,3 +1,10 @@ +2017-06-20 David Malcolm <dmalcolm@redhat.com> + + * include/line-map.h (class rich_location): Document that attempts + to delete or replace a range *affecting* multiple lines will fail. + * line-map.c (rich_location::maybe_add_fixit): Implement this + restriction. + 2017-06-09 David Malcolm <dmalcolm@redhat.com> * include/line-map.h diff --git a/libcpp/include/line-map.h b/libcpp/include/line-map.h index be3041df2be..f5c19e31a94 100644 --- a/libcpp/include/line-map.h +++ b/libcpp/include/line-map.h @@ -1556,6 +1556,8 @@ class fixit_hint; inserting at the start of a line, and finishing with a newline (with no interior newline characters). Other attempts to add fix-it hints containing newline characters will fail. + Similarly, attempts to delete or replace a range *affecting* multiple + lines will fail. The rich_location API handles these failures gracefully, so that diagnostics can attempt to add fix-it hints without each needing diff --git a/libcpp/line-map.c b/libcpp/line-map.c index 694137a7360..7ba003add98 100644 --- a/libcpp/line-map.c +++ b/libcpp/line-map.c @@ -2327,6 +2327,25 @@ rich_location::maybe_add_fixit (source_location start, if (reject_impossible_fixit (next_loc)) return; + /* Only allow fix-it hints that affect a single line in one file. + Compare the end-points. */ + expanded_location exploc_start + = linemap_client_expand_location_to_spelling_point (start); + expanded_location exploc_next_loc + = linemap_client_expand_location_to_spelling_point (next_loc); + /* They must be within the same file... */ + if (exploc_start.file != exploc_next_loc.file) + { + stop_supporting_fixits (); + return; + } + /* ...and on the same line. */ + if (exploc_start.line != exploc_next_loc.line) + { + stop_supporting_fixits (); + return; + } + const char *newline = strchr (new_content, '\n'); if (newline) { @@ -2342,8 +2361,6 @@ rich_location::maybe_add_fixit (source_location start, } /* The insertion must be at the start of a line. */ - expanded_location exploc_start - = linemap_client_expand_location_to_spelling_point (start); if (exploc_start.column != 1) { stop_supporting_fixits (); |