From 60251da204e9b814a2947895851dfc78539e92f3 Mon Sep 17 00:00:00 2001 From: Veetaha Date: Tue, 14 Jan 2020 03:34:38 +0200 Subject: refactor(ra_syntax.validation): removed code duplication from validate_literal() function --- crates/ra_syntax/src/validation.rs | 61 ++++++++++++++++---------------------- 1 file changed, 26 insertions(+), 35 deletions(-) (limited to 'crates/ra_syntax') diff --git a/crates/ra_syntax/src/validation.rs b/crates/ra_syntax/src/validation.rs index 222ac15f8..445e3b3e4 100644 --- a/crates/ra_syntax/src/validation.rs +++ b/crates/ra_syntax/src/validation.rs @@ -111,55 +111,46 @@ pub(crate) fn validate(root: &SyntaxNode) -> Vec { errors } -// FIXME: kill duplication fn validate_literal(literal: ast::Literal, acc: &mut Vec) { + fn unquote(text: &str, prefix_len: usize, end_delimiter: char) -> Option<&str> { + text.rfind(end_delimiter).and_then(|end| text.get(prefix_len..end)) + } + let token = literal.token(); let text = token.text().as_str(); + + let mut push_err = |prefix_len, (off, err): (usize, unescape::EscapeError)| { + let off = token.text_range().start() + TextUnit::from_usize(off + prefix_len); + acc.push(SyntaxError::new(err.into(), off)); + }; + match token.kind() { BYTE => { - if let Some(end) = text.rfind('\'') { - if let Some(without_quotes) = text.get(2..end) { - if let Err((off, err)) = unescape::unescape_byte(without_quotes) { - let off = token.text_range().start() + TextUnit::from_usize(off + 2); - acc.push(SyntaxError::new(err.into(), off)) - } - } + if let Some(Err(e)) = unquote(text, 2, '\'').map(unescape::unescape_byte) { + push_err(2, e); } } CHAR => { - if let Some(end) = text.rfind('\'') { - if let Some(without_quotes) = text.get(1..end) { - if let Err((off, err)) = unescape::unescape_char(without_quotes) { - let off = token.text_range().start() + TextUnit::from_usize(off + 1); - acc.push(SyntaxError::new(err.into(), off)) - } - } + if let Some(Err(e)) = unquote(text, 1, '\'').map(unescape::unescape_char) { + push_err(1, e); } } BYTE_STRING => { - if let Some(end) = text.rfind('\"') { - if let Some(without_quotes) = text.get(2..end) { - unescape::unescape_byte_str(without_quotes, &mut |range, char| { - if let Err(err) = char { - let off = range.start; - let off = token.text_range().start() + TextUnit::from_usize(off + 2); - acc.push(SyntaxError::new(err.into(), off)) - } - }) - } + if let Some(without_quotes) = unquote(text, 2, '"') { + unescape::unescape_byte_str(without_quotes, &mut |range, char| { + if let Err(err) = char { + push_err(2, (range.start, err)); + } + }) } } STRING => { - if let Some(end) = text.rfind('\"') { - if let Some(without_quotes) = text.get(1..end) { - unescape::unescape_str(without_quotes, &mut |range, char| { - if let Err(err) = char { - let off = range.start; - let off = token.text_range().start() + TextUnit::from_usize(off + 1); - acc.push(SyntaxError::new(err.into(), off)) - } - }) - } + if let Some(without_quotes) = unquote(text, 1, '"') { + unescape::unescape_str(without_quotes, &mut |range, char| { + if let Err(err) = char { + push_err(1, (range.start, err)); + } + }) } } _ => (), -- cgit v1.2.3