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
|
// Generated by re2zig
// re2zig $INPUT -o $OUTPUT --recursive-functions
const std = @import("std");
const State = struct {
str: [:0]const u8,
cur: u32,
};
const SyntaxError = error {
UnexpectedCharacter
};
fn yy0(st: *State) SyntaxError!void {
const yych = st.str[st.cur];
st.cur += 1;
switch (yych) {
0x31...0x39 => { return try yy2(st); },
else => { return try yy1(st); },
}
}
fn yy1(st: *State) SyntaxError!void {
_ = st; return SyntaxError.UnexpectedCharacter;
}
fn yy2(st: *State) SyntaxError!void {
const yych = st.str[st.cur];
switch (yych) {
0x30...0x39 => {
st.cur += 1;
return try yy2(st);
},
else => { return try yy3(st); },
}
}
fn yy3(st: *State) SyntaxError!void {
_ = st; return;
}
fn lex(st: *State) SyntaxError!void {
return try yy0(st);
}
test {
var st = State{.str = "1234", .cur = 0};
try lex(&st);
}
|
