brainfuck interpreter
brainfuck
cli
rust
lexer: Token now contains current_offset at time of construction
used for miette pretty errors
+4
+4
src/lexer.rs
+4
src/lexer.rs
···
1
1
#[derive(Copy, Clone, Debug)]
2
2
pub struct Token {
3
3
pub byte: u8,
4
+
pub offset: usize,
4
5
pub line: usize,
5
6
pub col: usize,
6
7
}
···
9
10
let mut tokens = Vec::new();
10
11
let mut current_line: usize = 1;
11
12
let mut current_col: usize = 1;
13
+
let mut current_offset: usize = 0;
12
14
13
15
for b in input.bytes() {
14
16
if b == b'\n' {
···
20
22
if matches!(b, b'>' | b'<' | b'+' | b'-' | b'.' | b',' | b'[' | b']') {
21
23
tokens.push(Token {
22
24
byte: b,
25
+
offset: current_offset,
23
26
line: current_line,
24
27
col: current_col,
25
28
});
26
29
}
27
30
28
31
current_col += 1;
32
+
current_offset += 1;
29
33
}
30
34
31
35
tokens