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+// file : libbuild2/script/regex.test.cxx -*- C++ -*-
+// license : MIT; see accompanying LICENSE file
+
+#include <regex>
+#include <type_traits> // is_*
+
+#include <libbuild2/script/regex.hxx>
+
+using namespace std;
+using namespace build2::script::regex;
+
+int
+main ()
+{
+ using lc = line_char;
+ using ls = line_string;
+ using lr = line_regex;
+ using cf = char_flags;
+ using cr = char_regex;
+
+ init (); // Initializes the script regex global state.
+
+ // Test line_char.
+ //
+ {
+ static_assert (is_trivial<lc>::value &&
+ is_standard_layout<lc>::value &&
+ !is_array<lc>::value,
+ "line_char must be char-like");
+
+ // Zero-initialed line_char should be the null-char as required by
+ // char_traits<>::length() specification.
+ //
+ assert (lc () == lc::nul);
+
+ line_pool p;
+
+ assert (lc::eof == -1);
+ assert (lc::nul == 0);
+
+ enum meta {mn = 'n', mp = 'p'};
+
+ // Special roundtrip.
+ //
+ assert (lc ('0').special () == '0');
+ assert (lc (0).special () == 0);
+ assert (lc (-1).special () == -1);
+ assert (lc ('p').special () == 'p');
+ assert (lc (u'\u2028').special () == u'\u2028');
+
+ // Special comparison.
+ //
+ assert (lc ('0') == lc ('0'));
+ assert (lc ('0') == '0');
+ assert (lc ('n') == mn);
+ assert (mn == static_cast<meta> (lc ('n')));
+
+ assert (lc ('0') != lc ('1'));
+ assert (lc ('0') != '1');
+ assert (lc ('n') != mp);
+ assert (lc ('0') != lc ("0", p));
+ assert (lc ('0') != lc (cr ("0"), p));
+
+ assert (lc ('0') < lc ('1'));
+ assert (lc ('0') < '1');
+ assert (lc ('1') < lc ("0", p));
+ assert (lc ('n') < mp);
+
+ assert (lc ('0') <= '1');
+ assert (lc ('0') <= lc ('1'));
+ assert (lc ('n') <= mn);
+ assert (lc ('1') <= lc ("0", p));
+
+ // Literal roundtrip.
+ //
+ assert (*lc ("abc", p).literal () == "abc");
+
+ // Literal comparison.
+ //
+ assert (lc ("a", p) == lc ("a", p));
+ assert (lc ("a", p).literal () == lc ("a", p).literal ());
+ assert (char (lc ("a", p)) == '\a');
+
+ assert (lc ("a", p) != lc ("b", p));
+ assert (!(lc ("a", p) != lc (cr ("a"), p)));
+ assert (lc ("a", p) != lc (cr ("b"), p));
+
+ assert (lc ("a", p) < lc ("b", p));
+ assert (!(lc ("a", p) < lc (cr ("a"), p)));
+
+ assert (lc ("a", p) <= lc ("b", p));
+ assert (lc ("a", p) <= lc (cr ("a"), p));
+ assert (lc ("a", p) < lc (cr ("c"), p));
+
+ // Regex roundtrip.
+ //
+ assert (regex_match ("abc", *lc (cr ("abc"), p).regex ()));
+
+ // Regex flags.
+ //
+ // icase
+ //
+ assert (regex_match ("ABC", cr ("abc", cf::icase)));
+
+ // idot
+ //
+ assert (!regex_match ("a", cr ("[.]", cf::idot)));
+ assert (!regex_match ("a", cr ("[\\.]", cf::idot)));
+
+ assert (regex_match ("a", cr (".")));
+ assert (!regex_match ("a", cr (".", cf::idot)));
+ assert (regex_match ("a", cr ("\\.", cf::idot)));
+ assert (!regex_match ("a", cr ("\\.")));
+
+ // regex::transform()
+ //
+ // The function is static and we can't test it directly. So we will test
+ // it indirectly via regex matches.
+ //
+ // @@ Would be nice to somehow address the inability to test internals (not
+ // exposed via headers). As a part of utility library support?
+ //
+ assert (regex_match (".a[.", cr (".\\.\\[[.]", cf::idot)));
+ assert (regex_match (".a[.", cr (".\\.\\[[\\.]", cf::idot)));
+ assert (!regex_match ("ba[.", cr (".\\.\\[[.]", cf::idot)));
+ assert (!regex_match (".a[b", cr (".\\.\\[[.]", cf::idot)));
+ assert (!regex_match (".a[b", cr (".\\.\\[[\\.]", cf::idot)));
+
+ // Regex comparison.
+ //
+ assert (lc ("a", p) == lc (cr ("a|b"), p));
+ assert (lc (cr ("a|b"), p) == lc ("a", p));
+ }
+
+ // Test char_traits<line_char>.
+ //
+ {
+ using ct = char_traits<lc>;
+ using vc = vector<lc>;
+
+ lc c;
+ ct::assign (c, '0');
+ assert (c == ct::char_type ('0'));
+
+ assert (ct::to_char_type (c) == c);
+ assert (ct::to_int_type (c) == c);
+
+ assert (ct::eq_int_type (c, c));
+ assert (!ct::eq_int_type (c, lc::eof));
+
+ assert (ct::eof () == lc::eof);
+
+ assert (ct::not_eof (c) == c);
+ assert (ct::not_eof (lc::eof) != lc::eof);
+
+ ct::assign (&c, 1, '1');
+ assert (c == ct::int_type ('1'));
+
+ assert (ct::eq (lc ('0'), lc ('0')));
+ assert (ct::lt (lc ('0'), lc ('1')));
+
+ vc v1 ({'0', '1', '2'});
+ vc v2 (3, lc::nul);
+
+ assert (ct::find (v1.data (), 3, '1') == v1.data () + 1);
+
+ ct::copy (v2.data (), v1.data (), 3);
+ assert (v2 == v1);
+
+ v2.push_back (lc::nul);
+ assert (ct::length (v2.data ()) == 3);
+
+ // Overlaping ranges.
+ //
+ ct::move (v1.data () + 1, v1.data (), 2);
+ assert (v1 == vc ({'0', '0', '1'}));
+
+ v1 = vc ({'0', '1', '2'});
+ ct::move (v1.data (), v1.data () + 1, 2);
+ assert (v1 == vc ({'1', '2', '2'}));
+ }
+
+ // Test line_char_locale and ctype<line_char> (only non-trivial functions).
+ //
+ {
+ using ct = ctype<lc>;
+
+ line_char_locale l;
+
+ // It is better not to create q facet on stack as it is
+ // reference-countable.
+ //
+ const ct& t (use_facet<ct> (l));
+ line_pool p;
+
+ assert (t.is (ct::digit, '0'));
+ assert (!t.is (ct::digit, '?'));
+ assert (!t.is (ct::digit, lc ("0", p)));
+
+ const lc chars[] = { '0', '?' };
+ ct::mask m[2];
+
+ const lc* b (chars);
+ const lc* e (chars + 2);
+
+ // Cast flag value to mask type and compare to mask.
+ //
+ auto fl = [] (ct::mask m, ct::mask f) {return m == f;};
+
+ t.is (b, e, m);
+ assert (fl (m[0], ct::digit) && fl (m[1], 0));
+
+ assert (t.scan_is (ct::digit, b, e) == b);
+ assert (t.scan_is (0, b, e) == b + 1);
+
+ assert (t.scan_not (ct::digit, b, e) == b + 1);
+ assert (t.scan_not (0, b, e) == b);
+
+ {
+ char nr[] = "0?";
+ lc wd[2];
+ t.widen (nr, nr + 2, wd);
+ assert (wd[0] == b[0] && wd[1] == b[1]);
+ }
+
+ {
+ lc wd[] = {'0', lc ("a", p)};
+ char nr[2];
+ t.narrow (wd, wd + 2, '-', nr);
+ assert (nr[0] == '0' && nr[1] == '-');
+ }
+ }
+
+ // Test regex_traits<line_char>. Functions other that value() are trivial.
+ //
+ {
+ regex_traits<lc> t;
+
+ const int radix[] = {8, 10}; // Radix 16 is not supported by line_char.
+ const char digits[] = "0123456789ABCDEF";
+
+ for (size_t r (0); r < 2; ++r)
+ {
+ for (int i (0); i < radix[r]; ++i)
+ assert (t.value (digits[i], radix[r]) == i);
+ }
+ }
+
+ // Test line_regex construction.
+ //
+ {
+ line_pool p;
+ lr r1 ({lc ("foo", p), lc (cr ("ba(r|z)"), p)}, move (p));
+
+ lr r2 (move (r1));
+ assert (regex_match (ls ({lc ("foo", r2.pool), lc ("bar", r2.pool)}), r2));
+ assert (!regex_match (ls ({lc ("foo", r2.pool), lc ("ba", r2.pool)}), r2));
+ }
+
+ // Test line_regex match.
+ //
+ {
+ line_pool p;
+
+ const lc foo ("foo", p);
+ const lc bar ("bar", p);
+ const lc baz ("baz", p);
+ const lc blank ("", p);
+
+ assert (regex_match (ls ({foo, bar}), lr ({foo, bar})));
+ assert (!regex_match (ls ({foo, baz}), lr ({foo, bar})));
+
+ assert (regex_match (ls ({bar, foo}),
+ lr ({'(', foo, '|', bar, ')', '+'})));
+
+ assert (regex_match (ls ({foo, foo, bar}),
+ lr ({'(', foo, ')', '\\', '1', bar})));
+
+ assert (regex_match (ls ({foo}), lr ({lc (cr ("fo+"), p)})));
+ assert (regex_match (ls ({foo}), lr ({lc (cr (".*"), p)})));
+ assert (regex_match (ls ({blank}), lr ({lc (cr (".*"), p)})));
+
+ assert (regex_match (ls ({blank, blank, foo}),
+ lr ({blank, '*', foo, blank, '*'})));
+
+ assert (regex_match (ls ({blank, blank, foo}), lr ({'.', '*'})));
+
+ assert (regex_match (ls ({blank, blank}),
+ lr ({blank, '*', foo, '?', blank, '*'})));
+
+ assert (regex_match (ls ({foo}), lr ({foo, '{', '1', '}'})));
+ assert (regex_match (ls ({foo, foo}), lr ({foo, '{', '1', ',', '}'})));
+
+ assert (regex_match (ls ({foo, foo}),
+ lr ({foo, '{', '1', ',', '2', '}'})));
+
+ assert (!regex_match (ls ({foo, foo}),
+ lr ({foo, '{', '3', ',', '4', '}'})));
+
+ assert (regex_match (ls ({foo}), lr ({'(', '?', '=', foo, ')', foo})));
+ assert (regex_match (ls ({foo}), lr ({'(', '?', '!', bar, ')', foo})));
+ }
+}
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