Function count_trailing_close_chars

src/completion/array_shape.rs:620–652

Count the number of trailing auto-inserted characters after the cursor. When the IDE auto-closes brackets, the line may contain: - `']` or `"]` after the cursor (2 chars) — when a quote was typed - `]` after the cursor (1 char) — when only `[` was typed This function looks at the characters starting at `cursor_col` and returns how many should be consumed by the text edit range.

(
    chars: &[char],
    cursor_col: usize,
    quote_char: Option<char>,
)

/// This function looks at the characters starting at `cursor_col` and
/// returns how many should be consumed by the text edit range.
fn count_trailing_close_chars(
    chars: &[char],
    cursor_col: usize,
    quote_char: Option<char>,
) -> usize {
    if cursor_col >= chars.len() {
        return 0;
    }

    let remaining = &chars[cursor_col..];

    match quote_char {
        Some(q) => {
            // Expect closing quote + `]`
            if remaining.len() >= 2 && remaining[0] == q && remaining[1] == ']' {
                2
            } else if !remaining.is_empty() && remaining[0] == ']' {
                // Just a `]` even though we had a quote — still consume it
                1
            } else {
                0
            }
        }
        None => {
            // Expect just `]`
            if !remaining.is_empty() && remaining[0] == ']' {
                1
            } else {
                0
            }
        }
    }
}

/// Extract spread expressions from an array literal.
///