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// re2swift $INPUT -o $OUTPUT --api generic -d
func lex(_ s: UnsafeBufferPointer<UInt8>) -> Bool {
var cursor = 0, marker = 0
/*!re2c
re2c:yyfill:enable = 0;
re2c:YYPEEK = "s[cursor]";
re2c:YYSKIP = "cursor += 1";
re2c:YYBACKUP = "marker = cursor";
re2c:YYRESTORE = "cursor = marker";
re2c:YYDEBUG = "print(\"lex: '\\(@@{char})' int state \\(@@{state})\")";
end = [\x00];
[0-9]+ end { return true }
* { return false }
*/
}
@main struct Program {
static func main() {
let s: StaticString = "123\0"
s.withUTF8Buffer {
assert(lex($0), "expected 123")
}
}
}
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