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specctra/read: don't repeat character retrieval code

This commit is contained in:
Alain Emilia Anna Zscheile 2024-09-30 20:06:47 +02:00 committed by tomec
parent 62b58e2210
commit b738a425e4
1 changed files with 8 additions and 16 deletions
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22
src/specctra/read.rs
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@ -198,16 +198,8 @@ impl<R: std::io::BufRead> ListTokenizer<R> {
}
fn next_char(&mut self) -> Result<char, ParseErrorContext> {
let return_chr = if let Some(chr) = self.peeked_char {
let return_chr = self.peek_char()?;
self.peeked_char = None;
chr
} else {
self.reader
.chars()
.next()
.ok_or(self.add_context(ParseError::Eof))?
.map_err(|err| self.add_context(err.into()))?
};
if return_chr == '\n' {
self.line += 1;
@ -220,17 +212,17 @@ impl<R: std::io::BufRead> ListTokenizer<R> {
}
fn peek_char(&mut self) -> Result<char, ParseErrorContext> {
if let Some(chr) = self.peeked_char {
Ok(chr)
Ok(if let Some(chr) = self.peeked_char {
chr
} else {
let chr = self.reader
.chars()
.next()
.read_char()
.transpose()
.ok_or(self.add_context(ParseError::Eof))?
.map_err(|err| self.add_context(err.into()))?;
self.peeked_char = Some(chr);
Ok(chr)
}
chr
})
}
fn skip_whitespace(&mut self) -> Result<(), ParseErrorContext> {