56 lines
1.2 KiB
Rust
56 lines
1.2 KiB
Rust
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use std::iter::Iterator;
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use codemap::Spanned;
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use peekmore::PeekMoreIterator;
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use crate::error::SassResult;
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use crate::Token;
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pub(crate) fn eat_number<I: Iterator<Item = Token>>(
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toks: &mut PeekMoreIterator<I>,
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) -> SassResult<Spanned<String>> {
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let mut whole = String::new();
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let mut span = if let Some(tok) = toks.peek() {
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tok.pos()
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} else {
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todo!()
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};
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while let Some(c) = toks.peek() {
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if !c.kind.is_numeric() {
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break;
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}
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let tok = toks.next().unwrap();
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span = span.merge(tok.pos());
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whole.push(tok.kind);
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}
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if toks.peek().is_none() {
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return Ok(Spanned { node: whole, span });
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}
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let mut dec = String::new();
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let next_tok = toks.peek().unwrap().clone();
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if next_tok.kind == '.' {
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toks.next();
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dec.push('.');
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while let Some(c) = toks.peek() {
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if !c.kind.is_numeric() {
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break;
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}
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let tok = toks.next().unwrap();
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span = span.merge(tok.pos());
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dec.push(tok.kind);
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}
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}
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if dec.len() == 1 {
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return Err(("Expected digit.", next_tok.pos()).into());
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}
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whole.push_str(&dec);
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Ok(Spanned { node: whole, span })
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}
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