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[lexer] Add number::Sign state

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This commit is contained in:
Eryn Wells 2018-09-03 15:49:13 -07:00
parent 663ae3a9f1
commit eabc8f98e8
3 changed files with 60 additions and 5 deletions
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14
lexer/src/states/number/prefix.rs
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@ -2,10 +2,11 @@
* Eryn Wells <eryn@erynwells.me>
*/
use chars::Lexable;
use error::Error;
use states::{State, StateResult};
use states::number::{Radix, Exact};
use states::number::Builder;
use states::number::{Builder, Radix, Exact};
use states::number::sign::Sign;
use token::Token;
#[derive(Debug)] pub struct Prefix(Builder);
@ -31,9 +32,12 @@ impl Prefix {
impl State for Prefix {
fn lex(&mut self, c: char) -> StateResult {
match c {
'#' => StateResult::advance(Box::new(Hash(self.0))),
_ => StateResult::fail(Error::invalid_char(c))
if c.is_hash() {
StateResult::advance(Box::new(Hash(self.0)))
} else if let Some(sn) = Sign::with_char(self.0, c) {
StateResult::advance(Box::new(sn))
} else {
StateResult::fail(Error::invalid_char(c))
}
}