A simple crate for calculating 1-based line/col numbers for a string slice.
```rust use line_col::LineColLookup;
let text = "One\nTwo";
let lookup = LineColLookup::new(text);
asserteq!(lookup.get(0), (1, 1)); // 'O' (line 1, col 1)
asserteq!(lookup.get(1), (1, 2)); // 'n' (line 1, col 2)
asserteq!(lookup.get(2), (1, 3)); // 'e' (line 1, col 3)
asserteq!(lookup.get(4), (2, 1)); // 'T' (line 2, col 1)
asserteq!(lookup.get(5), (2, 2)); // 'w' (line 2, col 2)
asserteq!(lookup.get(6), (2, 3)); // 'o' (line 2, col 3)
assert_eq!(lookup.get(7), (2, 4)); //
This crate offers two methods for calculating the column number.
The LineColLookup::get method counts the number of bytes from the start of the line (plus one).
However, this does not account for grapheme clusters (e.g. complex accented characters, emoji, etc.)
If you would like to calculate the column based on the number of grapheme clusters instead, enable
the grapheme-clusters feature and use LineColLookup::get_by_cluster.
LineColLookup::get implementation into its own method, LineColLookup::get_by_clusterInitial version