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| author | Jim Fehrle | 2018-04-09 13:16:46 -0700 |
|---|---|---|
| committer | Jim Fehrle | 2018-07-23 20:13:19 -0700 |
| commit | 8de046df97b1ea391a3f3879c20c74d53c9fba48 (patch) | |
| tree | 3d1d3aed23093b3c2874a9a480d78400432f15cb /printing/printing.mllib | |
| parent | a6131723faa8699e485a88fae8cc2323b82a8461 (diff) | |
Displays the differences between successive proof steps in coqtop and CoqIDE.
Proof General requires minor changes to make the diffs visible, but this code
shouldn't break the existing version of PG.
Diffs are computed for the hypotheses and conclusion of the first goal between
the old and new proofs. Strings are split into tokens using the Coq lexer,
then the list of tokens are diffed using the Myers algorithm. A fixup routine
(Pp_diff.shorten_diff_span) shortens the span of the diff result in some cases.
Diffs can be enabled with the Coq commmand "Set Diffs on|off|removed." or
"-diffs on|off|removed" on the OS command line. The "on" option shows only the
new item with added text, while "removed" shows each modified item twice--once
with the old value showing removed text and once with the new value showing
added text.
The highlights use 4 tags to specify the color and underline/strikeout.
These are "diffs.added", "diffs.removed", "diffs.added.bg" and "diffs.removed.bg".
The first two are for added or removed text; the last two are for
unmodified parts of a modified item.
Diffs that span multiple strings in the Pp are tagged with "start.diff.*" and
"end.diff.*", but only on the first and last strings of the span.
Diffstat (limited to 'printing/printing.mllib')
| -rw-r--r-- | printing/printing.mllib | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/printing/printing.mllib b/printing/printing.mllib index b69d8a9ef8..deb52ad270 100644 --- a/printing/printing.mllib +++ b/printing/printing.mllib @@ -1,6 +1,7 @@ Genprint Pputils Ppconstr +Proof_diffs Printer Printmod Prettyp |