fatou 0.4.0

A language server, formatter, and linter for Julia
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use crate::parser::lexer::{TokKind, Token};

/// Skip horizontal whitespace only.
pub(crate) fn skip_ws(tokens: &[Token], mut i: usize) -> usize {
    while matches!(tokens.get(i).map(|t| t.kind), Some(TokKind::Whitespace)) {
        i += 1;
    }
    i
}

/// Skip whitespace and newlines.
pub(crate) fn skip_ws_and_newlines(tokens: &[Token], mut i: usize) -> usize {
    while matches!(
        tokens.get(i).map(|t| t.kind),
        Some(TokKind::Whitespace | TokKind::Newline)
    ) {
        i += 1;
    }
    i
}

/// Skip whitespace, newlines, and comments. Used when an operand is pending
/// (after an infix operator): an intervening comment is trivia before the
/// operand rather than an operand of its own.
pub(crate) fn skip_trivia(tokens: &[Token], mut i: usize) -> usize {
    while matches!(tokens.get(i).map(|t| t.kind), Some(k) if k.is_trivia()) {
        i += 1;
    }
    i
}

/// Advance to just past the next newline (or to end of input).
pub(crate) fn consume_to_line_end(tokens: &[Token], mut i: usize) -> usize {
    while i < tokens.len() && !matches!(tokens[i].kind, TokKind::Newline) {
        i += 1;
    }
    if i < tokens.len() && matches!(tokens[i].kind, TokKind::Newline) {
        i += 1;
    }
    i
}