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// Generated by re2zig
// re2zig $INPUT -o $OUTPUT
const std = @import("std");
const none = std.math.maxInt(usize);
const SemVer = struct {
major: u32,
minor: u32,
patch: u32,
};
fn s2n(str: []const u8) u32 { // convert pre-parsed string to a number
var n: u32 = 0;
for (str) |c| { n = n * 10 + (c - 48); }
return n;
}
fn parse(yyinput: [:0]const u8) ?SemVer {
var yycursor: usize = 0;
var yymarker: usize = 0;
// Final tag variables available in semantic action.
var yytl0: usize = none;var yytl1: usize = none;var yytl2: usize = none;var yytl3: usize = none;var yytr0: usize = none;var yytr1: usize = none;var yytr2: usize = none;var yytr3: usize = none;
// Intermediate tag variables used by the lexer (must be autogenerated).
var yyt1: usize = none;var yyt2: usize = none;var yyt3: usize = none;var yyt4: usize = none;var yyt5: usize = none;
var yych: u8 = 0;
var yystate: u32 = 0;
yyl: while (true) {
switch (yystate) {
0 => {
yych = yyinput[yycursor];
switch (yych) {
0x30...0x39 => {
yyt1 = yycursor;
yycursor += 1;
yystate = 3;
continue :yyl;
},
else => {
yycursor += 1;
yystate = 1;
continue :yyl;
},
}
},
1 => {
yystate = 2;
continue :yyl;
},
2 => { return null; },
3 => {
yymarker = yycursor;
yych = yyinput[yycursor];
switch (yych) {
0x2E => {
yycursor += 1;
yystate = 4;
continue :yyl;
},
0x30...0x39 => {
yycursor += 1;
yystate = 6;
continue :yyl;
},
else => {
yystate = 2;
continue :yyl;
},
}
},
4 => {
yych = yyinput[yycursor];
switch (yych) {
0x30...0x39 => {
yyt2 = yycursor;
yycursor += 1;
yystate = 7;
continue :yyl;
},
else => {
yystate = 5;
continue :yyl;
},
}
},
5 => {
yycursor = yymarker;
yystate = 2;
continue :yyl;
},
6 => {
yych = yyinput[yycursor];
switch (yych) {
0x2E => {
yycursor += 1;
yystate = 4;
continue :yyl;
},
0x30...0x39 => {
yycursor += 1;
yystate = 6;
continue :yyl;
},
else => {
yystate = 5;
continue :yyl;
},
}
},
7 => {
yych = yyinput[yycursor];
switch (yych) {
0x00 => {
yyt3 = yycursor;
yyt4 = std.math.maxInt(usize);
yyt5 = std.math.maxInt(usize);
yycursor += 1;
yystate = 8;
continue :yyl;
},
0x2E => {
yyt3 = yycursor;
yyt5 = yycursor;
yycursor += 1;
yystate = 9;
continue :yyl;
},
0x30...0x39 => {
yycursor += 1;
yystate = 7;
continue :yyl;
},
else => {
yystate = 5;
continue :yyl;
},
}
},
8 => {
yytl1 = yyt1;
yytl2 = yyt2;
yytr2 = yyt3;
yytl3 = yyt5;
yytr3 = yyt4;
yytl0 = yyt1;
yytr0 = yycursor;
yytr1 = yyt2;
yytr1 -= 1;
return SemVer {
.major = s2n(yyinput[yytl1..yytr1]),
.minor = s2n(yyinput[yytl2..yytr2]),
.patch = if (yytl3 == none) 0 else s2n(yyinput[yytl3 + 1..yytr3])
};
},
9 => {
yych = yyinput[yycursor];
if (yych <= 0x00) {
yystate = 5;
continue :yyl;
}
yystate = 11;
continue :yyl;
},
10 => {
yych = yyinput[yycursor];
yystate = 11;
continue :yyl;
},
11 => {
switch (yych) {
0x00 => {
yyt4 = yycursor;
yycursor += 1;
yystate = 8;
continue :yyl;
},
0x30...0x39 => {
yycursor += 1;
yystate = 10;
continue :yyl;
},
else => {
yystate = 5;
continue :yyl;
},
}
},
else => { @panic("internal lexer error"); },
}
}
}
test {
try std.testing.expectEqual(parse("23.34"), SemVer{.major = 23, .minor = 34, .patch = 0});
try std.testing.expectEqual(parse("1.2.99999"), SemVer{.major = 1, .minor = 2, .patch = 99999});
try std.testing.expectEqual(parse("1.a"), null);
}
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