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| author | Robin Haberkorn <robin.haberkorn@googlemail.com> | 2024-12-04 02:22:36 +0300 |
|---|---|---|
| committer | Robin Haberkorn <robin.haberkorn@googlemail.com> | 2024-12-04 11:43:18 +0300 |
| commit | 3a823fb43ba0abe52f3152d337675e9ed9a3f175 (patch) | |
| tree | f63143368fe15b4fbf88f9646a0a913eb46717fd /src/error.h | |
| parent | 11054d94a99e8c11d6010b117c84ee88b4fa1a73 (diff) | |
| download | sciteco-3a823fb43ba0abe52f3152d337675e9ed9a3f175.tar.gz | |
implemented ^Y/^S commands for receiving pattern match/insertion ranges and lengths (refs #27)
* Allows storing pattern matches into Q-Registers (^YXq).
* You can also refer to subpatterns marked by ^E[...] by passing a number > 0.
This is equivalent to \0-9 references in many programming languages.
* It's especially useful for supporting TECO's equivalent of structural regular expressions.
This will be done with additional macros.
* You can also simply back up to the beginning of an insertion or search.
So I...$^SC leaves dot at the beginning of the insertion.
S...$^SC leaves dot before the found pattern.
This has been previously requested by users.
* Perhaps there should be ^Y string building characters as well to backreference
in search-replacement commands (TODO).
This means that the search commands would have to store the matched text itself
in teco_range_t structures since FR deletes the matched text before
processing the replacement string.
It could also be made into a FR/FS-specific construct,
so we don't fetch the substrings unnecessarily.
* This differs from DEC TECO in always returning the same range even after dot movements,
since we are storing start/end byte positions instead of only the length.
Also DEC TECO does not support fetching subpattern ranges.
Diffstat (limited to 'src/error.h')
| -rw-r--r-- | src/error.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/error.h b/src/error.h index 5ffd434..2df7b89 100644 --- a/src/error.h +++ b/src/error.h @@ -44,6 +44,7 @@ typedef enum { TECO_ERROR_MOVE, TECO_ERROR_WORDS, TECO_ERROR_RANGE, + TECO_ERROR_SUBPATTERN, TECO_ERROR_INVALIDQREG, TECO_ERROR_QREGOPUNSUPPORTED, TECO_ERROR_QREGCONTAINSNULL, @@ -108,6 +109,13 @@ teco_error_range_set(GError **error, const gchar *cmd) } static inline void +teco_error_subpattern_set(GError **error, const gchar *cmd) +{ + g_set_error(error, TECO_ERROR, TECO_ERROR_SUBPATTERN, + "Invalid subpattern specified for <%s>", cmd); +} + +static inline void teco_error_invalidqreg_set(GError **error, const gchar *name, gsize len, gboolean local) { g_autofree gchar *name_printable = teco_string_echo(name, len); |