Initial support for ad hoc recipes (still work in progress)

1 files changed, 303 insertions, 0 deletions

diff --git a/libbuild2/script/regex.test.cxx b/libbuild2/script/regex.test.cxx
new file mode 100644
index 0000000..36d47e1
--- /dev/null
+++ b/libbuild2/script/regex.test.cxx
@@ -0,0 +1,303 @@
+// 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})));
+  }
+}