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authorKaren Arutyunov <karen@codesynthesis.com>2022-12-15 14:18:19 +0300
committerKaren Arutyunov <karen@codesynthesis.com>2022-12-15 15:34:43 +0300
commit86bd93d16bfb2d44c6d894db43b7ccd29374fccb (patch)
treeebf6e5441df645281a50cd4285a6be99af7dba9b /libbuild2/functions-regex.cxx
parentb3b14171766089890b9e1b44935ed5dbc233c5f8 (diff)
Add $regex.filter[_out]_{match,search}() functions
Diffstat (limited to 'libbuild2/functions-regex.cxx')
-rw-r--r--libbuild2/functions-regex.cxx273
1 files changed, 206 insertions, 67 deletions
diff --git a/libbuild2/functions-regex.cxx b/libbuild2/functions-regex.cxx
index 922be18..1465108 100644
--- a/libbuild2/functions-regex.cxx
+++ b/libbuild2/functions-regex.cxx
@@ -365,7 +365,7 @@ namespace build2
// apply() overloads (below) for details.
//
static names
- apply (names&& s,
+ apply (names&& ns,
const string& re,
const string& fmt,
optional<names>&& flags)
@@ -380,9 +380,9 @@ namespace build2
try
{
- for (auto& v: s)
+ for (auto& n: ns)
{
- string s (regex_replace_search (convert<string> (move (v)),
+ string s (regex_replace_search (convert<string> (move (n)),
rge,
fmt,
fl.second).first);
@@ -426,44 +426,109 @@ namespace build2
// See find_match() overloads (below) for details.
//
static bool
- find_match (names&& s, const string& re, optional<names>&& flags)
+ find_match (names&& ns, const string& re, optional<names>&& flags)
{
regex::flag_type fl (parse_find_flags (move (flags)));
regex rge (parse_regex (re, fl));
- for (auto& v: s)
+ for (auto& n: ns)
{
- if (regex_match (convert<string> (move (v)), rge))
+ if (regex_match (convert<string> (move (n)), rge))
return true;
}
return false;
}
+ // Return a list of elements that match (matching is true) or don't match
+ // (matching is false) the regular expression. See filter_match() and
+ // filter_out_match() overloads (below) for details.
+ //
+ static names
+ filter_match (names&& ns,
+ const string& re,
+ optional<names>&& flags,
+ bool matching)
+ {
+ regex::flag_type fl (parse_find_flags (move (flags)));
+ regex rge (parse_regex (re, fl));
+
+ names r;
+
+ for (name& n: ns)
+ {
+ // Note that we need to preserve the element while converting it to
+ // string since we may add it to the resulting list. But let's optimize
+ // this for the simple value case by round-tripping it through the
+ // string.
+ //
+ bool s (n.simple ());
+ string v (convert<string> (s ? move (n) : name (n)));
+
+ if (regex_match (v, rge) == matching)
+ r.emplace_back (s ? name (move (v)) : move (n));
+ }
+
+ return r;
+ }
+
// Return true if a part of any of the list elements matches the regular
// expression. See find_search() overloads (below) for details.
//
static bool
- find_search (names&& s, const string& re, optional<names>&& flags)
+ find_search (names&& ns, const string& re, optional<names>&& flags)
{
regex::flag_type fl (parse_find_flags (move (flags)));
regex rge (parse_regex (re, fl));
- for (auto& v: s)
+ for (auto& n: ns)
{
- if (regex_search (convert<string> (move (v)), rge))
+ if (regex_search (convert<string> (move (n)), rge))
return true;
}
return false;
}
+ // Return those elements of a list which have a match (matching is true) or
+ // have no match (matching is false) between the regular expression and
+ // some/any part of the element. See filter_search() and filter_out_search()
+ // overloads (below) for details.
+ //
+ static names
+ filter_search (names&& ns,
+ const string& re,
+ optional<names>&& flags,
+ bool matching)
+ {
+ regex::flag_type fl (parse_find_flags (move (flags)));
+ regex rge (parse_regex (re, fl));
+
+ names r;
+
+ for (auto& n: ns)
+ {
+ // Note that we need to preserve the element while converting it to
+ // string since we may add it to the resulting list. But let's optimize
+ // this for the simple value case by round-tripping it through the
+ // string.
+ //
+ bool s (n.simple ());
+ string v (convert<string> (s ? move (n) : name (n)));
+
+ if (regex_search (v, rge) == matching)
+ r.emplace_back (s ? name (move (v)) : move (n));
+ }
+
+ return r;
+ }
+
// Replace matched parts of list elements using the format string and
// concatenate the transformed elements. See merge() overloads (below) for
// details.
//
static names
- merge (names&& s,
+ merge (names&& ns,
const string& re,
const string& fmt,
optional<string>&& delim,
@@ -480,9 +545,9 @@ namespace build2
try
{
bool first (true);
- for (auto& v: s)
+ for (auto& n: ns)
{
- string s (regex_replace_search (convert<string> (move (v)),
+ string s (regex_replace_search (convert<string> (move (n)),
rge,
fmt,
fl.second).first);
@@ -534,33 +599,70 @@ namespace build2
// sub-strings that match the marked sub-expressions and
// NULL if no match
//
- f[".match"] += [](value s, string re, optional<names> flags)
+ f[".match"] += [](value v, string re, optional<names> flags)
{
- return match (move (s), re, move (flags));
+ return match (move (v), re, move (flags));
};
- f[".match"] += [](value s, names re, optional<names> flags)
+ f[".match"] += [](value v, names re, optional<names> flags)
{
- return match (move (s), convert<string> (move (re)), move (flags));
+ return match (move (v), convert<string> (move (re)), move (flags));
};
// $regex.find_match(<vals>, <pat> [, <flags>])
//
// Match list elements against the regular expression and return true if
- // the match is found. Convert the elements to string prior to matching.
+ // the match is found. Convert the elements to strings prior to matching.
//
// The following flags are supported:
//
// icase - match ignoring case
//
- f[".find_match"] += [](names s, string re, optional<names> flags)
+ f[".find_match"] += [](names ns, string re, optional<names> flags)
{
- return find_match (move (s), re, move (flags));
+ return find_match (move (ns), re, move (flags));
};
- f[".find_match"] += [](names s, names re, optional<names> flags)
+ f[".find_match"] += [](names ns, names re, optional<names> flags)
{
- return find_match (move (s), convert<string> (move (re)), move (flags));
+ return find_match (move (ns), convert<string> (move (re)), move (flags));
+ };
+
+ // $regex.filter_match(<vals>, <pat> [, <flags>])
+ // $regex.filter_out_match(<vals>, <pat> [, <flags>])
+ //
+ // Return elements of a list that match (filter) or do not match
+ // (filter_out) the regular expression. Convert the elements to strings
+ // prior to matching.
+ //
+ // The following flags are supported:
+ //
+ // icase - match ignoring case
+ //
+ f[".filter_match"] += [](names ns, string re, optional<names> flags)
+ {
+ return filter_match (move (ns), re, move (flags), true /* matching */);
+ };
+
+ f[".filter_match"] += [](names ns, names re, optional<names> flags)
+ {
+ return filter_match (move (ns),
+ convert<string> (move (re)),
+ move (flags),
+ true /* matching */);
+ };
+
+ f[".filter_out_match"] += [](names s, string re, optional<names> flags)
+ {
+ return filter_match (move (s), re, move (flags), false /* matching */);
+ };
+
+ f[".filter_out_match"] += [](names ns, names re, optional<names> flags)
+ {
+ return filter_match (move (ns),
+ convert<string> (move (re)),
+ move (flags),
+ false /* matching */);
};
// $regex.search(<val>, <pat> [, <flags>])
@@ -586,38 +688,75 @@ namespace build2
// If both return_match and return_subs flags are specified then the
// sub-string that matches the whole regular expression comes first.
//
- f[".search"] += [](value s, string re, optional<names> flags)
+ f[".search"] += [](value v, string re, optional<names> flags)
{
- return search (move (s), re, move (flags));
+ return search (move (v), re, move (flags));
};
- f[".search"] += [](value s, names re, optional<names> flags)
+ f[".search"] += [](value v, names re, optional<names> flags)
{
- return search (move (s), convert<string> (move (re)), move (flags));
+ return search (move (v), convert<string> (move (re)), move (flags));
};
// $regex.find_search(<vals>, <pat> [, <flags>])
//
// Determine if there is a match between the regular expression and some
- // part of any of the list elements. Convert the elements to string prior
+ // part of any of the list elements. Convert the elements to strings prior
// to matching.
//
// The following flags are supported:
//
// icase - match ignoring case
//
- f[".find_search"] += [](names s, string re, optional<names> flags)
+ f[".find_search"] += [](names ns, string re, optional<names> flags)
{
- return find_search (move (s), re, move (flags));
+ return find_search (move (ns), re, move (flags));
};
- f[".find_search"] += [](names s, names re, optional<names> flags)
+ f[".find_search"] += [](names ns, names re, optional<names> flags)
{
- return find_search (move (s),
+ return find_search (move (ns),
convert<string> (move (re)),
move (flags));
};
+ // $regex.filter_search(<vals>, <pat> [, <flags>])
+ // $regex.filter_out_search(<vals>, <pat> [, <flags>])
+ //
+ // Return elements of a list for which there is a match (filter) or no
+ // match (filter_out) between the regular expression and some part of the
+ // element. Convert the elements to strings prior to matching.
+ //
+ // The following flags are supported:
+ //
+ // icase - match ignoring case
+ //
+ f[".filter_search"] += [](names ns, string re, optional<names> flags)
+ {
+ return filter_search (move (ns), re, move (flags), true /* matching */);
+ };
+
+ f[".filter_search"] += [](names ns, names re, optional<names> flags)
+ {
+ return filter_search (move (ns),
+ convert<string> (move (re)),
+ move (flags),
+ true /* matching */);
+ };
+
+ f[".filter_out_search"] += [](names ns, string re, optional<names> flags)
+ {
+ return filter_search (move (ns), re, move (flags), false /* matching */);
+ };
+
+ f[".filter_out_search"] += [](names ns, names re, optional<names> flags)
+ {
+ return filter_search (move (ns),
+ convert<string> (move (re)),
+ move (flags),
+ false /* matching */);
+ };
+
// $regex.replace(<val>, <pat>, <fmt> [, <flags>])
//
// Replace matched parts in a value of an arbitrary type, using the format
@@ -638,14 +777,14 @@ namespace build2
// If both format_first_only and format_no_copy flags are specified then
// the result will only contain the replacement of the first match.
//
- f[".replace"] += [](value s, string re, string fmt, optional<names> flags)
+ f[".replace"] += [](value v, string re, string fmt, optional<names> flags)
{
- return replace (move (s), re, fmt, move (flags));
+ return replace (move (v), re, fmt, move (flags));
};
- f[".replace"] += [](value s, names re, names fmt, optional<names> flags)
+ f[".replace"] += [](value v, names re, names fmt, optional<names> flags)
{
- return replace (move (s),
+ return replace (move (v),
convert<string> (move (re)),
convert<string> (move (fmt)),
move (flags));
@@ -671,21 +810,21 @@ namespace build2
// Note that if format_no_copy is specified, unmatched lines are not
// copied either.
//
- f[".replace_lines"] += [](value s,
- string re,
- string fmt,
- optional<names> flags)
+ f[".replace_lines"] += [](value v,
+ string re,
+ string fmt,
+ optional<names> flags)
{
- return replace_lines (move (s), re, move (fmt), move (flags));
+ return replace_lines (move (v), re, move (fmt), move (flags));
};
- f[".replace_lines"] += [](value s,
- names re,
- names* fmt,
- optional<names> flags)
+ f[".replace_lines"] += [](value v,
+ names re,
+ names* fmt,
+ optional<names> flags)
{
return replace_lines (
- move (s),
+ move (v),
convert<string> (move (re)),
(fmt != nullptr
? optional<string> (convert<string> (move (*fmt)))
@@ -711,14 +850,14 @@ namespace build2
//
// format_copy_empty - copy empty elements into the result
//
- f[".split"] += [](value s, string re, string fmt, optional<names> flags)
+ f[".split"] += [](value v, string re, string fmt, optional<names> flags)
{
- return split (move (s), re, fmt, move (flags));
+ return split (move (v), re, fmt, move (flags));
};
- f[".split"] += [](value s, names re, names fmt, optional<names> flags)
+ f[".split"] += [](value v, names re, names fmt, optional<names> flags)
{
- return split (move (s),
+ return split (move (v),
convert<string> (move (re)),
convert<string> (move (fmt)),
move (flags));
@@ -727,7 +866,7 @@ namespace build2
// $regex.merge(<vals>, <pat>, <fmt> [, <delim> [, <flags>]])
//
// Replace matched parts in a list of elements using the regex format
- // string. Convert the elements to string prior to matching. The result
+ // string. Convert the elements to strings prior to matching. The result
// value is untyped and contains concatenation of transformed non-empty
// elements (unless the format_copy_empty flag is specified) optionally
// separated with a delimiter.
@@ -749,13 +888,13 @@ namespace build2
// the result will be a concatenation of only the first match
// replacements.
//
- f[".merge"] += [](names s,
- string re,
- string fmt,
- optional<string*> delim,
- optional<names> flags)
+ f[".merge"] += [](names ns,
+ string re,
+ string fmt,
+ optional<string*> delim,
+ optional<names> flags)
{
- return merge (move (s),
+ return merge (move (ns),
re,
fmt,
delim && *delim != nullptr
@@ -764,13 +903,13 @@ namespace build2
move (flags));
};
- f[".merge"] += [](names s,
- names re,
- names fmt,
- optional<names*> delim,
- optional<names> flags)
+ f[".merge"] += [](names ns,
+ names re,
+ names fmt,
+ optional<names*> delim,
+ optional<names> flags)
{
- return merge (move (s),
+ return merge (move (ns),
convert<string> (move (re)),
convert<string> (move (fmt)),
delim && *delim != nullptr
@@ -782,8 +921,8 @@ namespace build2
// $regex.apply(<vals>, <pat>, <fmt> [, <flags>])
//
// Replace matched parts of each element in a list using the regex format
- // string. Convert the elements to string prior to matching. Return a list
- // of transformed elements, omitting the empty ones (unless the
+ // string. Convert the elements to strings prior to matching. Return a
+ // list of transformed elements, omitting the empty ones (unless the
// format_copy_empty flag is specified).
//
// Substitution escape sequences are extended with a subset of Perl
@@ -803,14 +942,14 @@ namespace build2
// the result elements will only contain the replacement of the first
// match.
//
- f[".apply"] += [](names s, string re, string fmt, optional<names> flags)
+ f[".apply"] += [](names ns, string re, string fmt, optional<names> flags)
{
- return apply (move (s), re, fmt, move (flags));
+ return apply (move (ns), re, fmt, move (flags));
};
- f[".apply"] += [](names s, names re, names fmt, optional<names> flags)
+ f[".apply"] += [](names ns, names re, names fmt, optional<names> flags)
{
- return apply (move (s),
+ return apply (move (ns),
convert<string> (move (re)),
convert<string> (move (fmt)),
move (flags));