diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/regexp.zig | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/regexp.zig b/src/regexp.zig index 249763c2..97e3dc91 100644 --- a/src/regexp.zig +++ b/src/regexp.zig @@ -235,3 +235,26 @@ test "a \\x without two hex digits is refused, not handed to mvzr to panic on" { var rx = try Regex.compile("\\x41"); try std.testing.expectEqual(@as(usize, 1), (try rx.find("xA", 0, 1, 2)).?.start); } + +test "a repeat inside a group gives back to what follows the group" { + const Case = struct { pat: []const u8, text: []const u8, start: usize, end: usize }; + for ([_]Case{ + .{ .pat = "a+ab", .text = "aab", .start = 0, .end = 3 }, + .{ .pat = "(a+)ab", .text = "aab", .start = 0, .end = 3 }, + .{ .pat = "(a*)ab", .text = "aab", .start = 0, .end = 3 }, + .{ .pat = "(.+)_area", .text = "the_total_area x", .start = 0, .end = 14 }, + .{ .pat = "([a-z_]+)_area", .text = "the_total_area x", .start = 0, .end = 14 }, + .{ .pat = "\\w+_area", .text = "the_total_area x", .start = 0, .end = 14 }, + .{ .pat = "(\\w)+_area", .text = "the_total_area x", .start = 0, .end = 14 }, + .{ .pat = "([a-z]+)_area", .text = "the_total_area x", .start = 4, .end = 14 }, + .{ .pat = "x(ab|a)bc", .text = "xabc", .start = 0, .end = 4 }, + }) |c| { + var rx = try Regex.compile(c.pat); + const m = (try rx.find(c.text, 0, c.text.len, c.text.len)) orelse { + std.debug.print("no match for {s}\n", .{c.pat}); + return error.NoMatch; + }; + try std.testing.expectEqual(c.start, m.start); + try std.testing.expectEqual(c.end, m.end); + } +} |