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Maaru - token work

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This commit is contained in:
greg 2017-02-04 12:01:26 -08:00
parent 815f2b8242
commit 840e093bc4
1 changed files with 47 additions and 3 deletions
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50
src/maaru_lang/mod.rs
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@ -19,6 +19,7 @@ pub struct MaaruEvaluator {
#[derive(Debug)]
pub enum Token {
StrLiteral(String),
Backtick,
Newline,
LParen,
RParen,
@ -26,7 +27,11 @@ pub enum Token {
RBracket,
LBrace,
RBrace,
Period,
Comma,
Colon,
Semicolon,
SingleQuote,
Identifier(String),
Operator(String),
NumLiteral(Number),
@ -34,7 +39,8 @@ pub enum Token {
#[derive(Debug)]
pub enum Number {
Integer(u64),
IntegerRep(String),
FloatRep(String)
}
#[derive(Debug)]
@ -72,13 +78,51 @@ impl ProgrammingLanguage for Maaru {
'{' => LBrace,
'}' => RBrace,
',' => Comma,
':' => Colon,
';' => Semicolon,
'.' => Period,
'`' => Backtick,
'\'' => SingleQuote,
'"' => {
let mut buffer = String::new();
loop {
match iter.next() {
Some(x) if x == '"' => break,
Some(x) => buffer.push(x),
None => return Err(TokenError::new("Unclosed quote")),
}
}
StrLiteral(buffer)
}
c if c.is_digit(10) => {
let mut integer = true;
let mut buffer = String::new();
buffer.push(c);
buffer.extend(iter.peeking_take_while(|x| x.is_digit(10)));
if let Some(&'.') = iter.peek() {
buffer.push(iter.next().unwrap());
integer = false;
}
buffer.extend(iter.peeking_take_while(|x| x.is_digit(10)));
let inner = if integer {
Number::IntegerRep(buffer)
} else {
Number::FloatRep(buffer)
};
NumLiteral(inner)
},
c if char::is_alphanumeric(c) => {
let mut buffer = String::new();
buffer.push(c);
buffer.extend(iter.peeking_take_while(|x| char::is_whitespace(*x)));
buffer.extend(iter.peeking_take_while(|x| char::is_alphanumeric(*x)));
Identifier(buffer)
},
_ => unimplemented!(),
c => {
let mut buffer = String::new();
buffer.push(c);
buffer.extend(iter.peeking_take_while(|x| !char::is_whitespace(*x)));
Operator(buffer)
}
};
tokens.push(cur_tok);
}