1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
// re2java $INPUT -o $OUTPUT
import java.util.Optional;
class Main {
static class SemVer {
int major;
int minor;
int patch;
public SemVer(int m, int n, int k) {
major = m;
minor = n;
patch = k;
}
public boolean equals(SemVer v) {
return major == v.major && minor == v.minor && patch == v.patch;
}
};
static Optional<SemVer> parse(String yyinput) {
int yycursor = 0;
int yymarker = 0;
// Final tag variables available in semantic action.
/*!svars:re2c format = "int @@;"; */
// Intermediate tag variables used by the lexer (must be autogenerated).
/*!stags:re2c format = "int @@ = -1;"; */
/*!re2c
re2c:YYCTYPE = "char";
re2c:YYPEEK = "yyinput.charAt(yycursor)";
re2c:yyfill:enable = 0;
re2c:captvars = 1;
num = [0-9]+;
(num) "." (num) ("." num)? [\x00] {
int major = Integer.valueOf(yyinput.substring(yytl1, yytr1));
int minor = Integer.valueOf(yyinput.substring(yytl2, yytr2));
int patch = (yytl3 == -1) ? 0
: Integer.valueOf(yyinput.substring(yytl3 + 1, yytr3));
return Optional.of(new SemVer(major, minor, patch));
}
* { return Optional.empty(); }
*/
}
public static void main(String []args) {
assert parse("23.34\0").get().equals(new SemVer(23, 34, 0));
assert parse("1.2.99999\0").get().equals(new SemVer(1, 2, 99999));
assert !parse("1.a\0").isPresent();
}
};
|
