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pub type LineNum = u16; | |
pub type Pos = u32; | |
pub type Length = u8; | |
#[allow(dead_code)] | |
#[derive(Debug, Clone)] | |
pub enum Kind { | |
/// ident token | |
/// it is abstract token, can not used for concrete token | |
Ident, | |
/// Unknown token | |
/// use for initialized token kind | |
Unknown, | |
/// EOL \n \r ; | |
EOL, | |
/// -- | |
LineComment, | |
/// --[[]] | |
EmptyComment, | |
/// --[[ | |
BlkCommentStart, | |
/// ]] | |
BlkCommentEnd, | |
/// Normal string literal | |
/// "xxx" | |
Slit, | |
/// Quoted string literal | |
/// `sample \a` | |
QSlit, | |
/// 1, ..., 99999 | |
/// 1.1, ...., 99999.9999... | |
Nlit, | |
/// ( | |
Lpar, | |
/// ) | |
Rpar, | |
/// { | |
Lbrac, | |
/// } | |
Rbrac, | |
/// [ | |
Lsqua, | |
/// ] | |
Rsqua, | |
/// ; | |
Scolon, | |
/// : | |
Dcolon, | |
/// , | |
Comma, | |
/// . | |
Sdot, | |
/// .. | |
Ddot, | |
/// ... | |
Tdot, | |
/// + | |
Plus, | |
/// - | |
Minus, | |
/// * | |
Multi, | |
/// / | |
Divide, | |
/// % | |
Remain, | |
/// ^ | |
Pow, | |
/// # | |
ArrLen, | |
/// == | |
Equal, | |
/// != | |
NotEqual, | |
/// <= | |
LessEqual, | |
/// < | |
Less, | |
/// >= | |
GreaterEqual, | |
/// > | |
Greater, | |
/// := | |
Assign, | |
/// ?:= | |
ElvisAssign, | |
/// and | |
And, | |
/// not | |
Not, | |
/// or | |
Or, | |
/// break | |
Break, | |
/// do | |
Do, | |
/// if | |
If, | |
/// else | |
Else, | |
/// elseif | |
ElseIf, | |
/// for | |
For, | |
/// end | |
End, | |
/// fun | |
Fun, | |
/// return | |
Return, | |
/// in | |
In, | |
/// let | |
Let, | |
/// true | |
True, | |
/// false | |
False, | |
/// nil | |
Nil, | |
/// repeat | |
Repeat, | |
/// then | |
Then, | |
/// until | |
Until, | |
/// while | |
While, | |
} | |
#[derive(Debug, Clone)] | |
pub struct Place { | |
pub linen : LineNum, | |
pub pos : Pos, | |
pub len : Length, | |
} | |
impl Place { | |
pub fn with(linen: LineNum, pos: Pos, len: Length) -> Place { | |
Place{ | |
linen : linen, | |
pos : pos, | |
len : len, | |
} | |
} | |
} | |
#[derive(Debug, Clone)] | |
pub struct Token { | |
pub kind : Kind, | |
pub value : Option<String>, | |
pub place : Place, | |
} | |
pub static UNDEFINED_TOKEN: Token = Token{ | |
kind : Kind::Unknown, | |
value : None, | |
place : Place{linen:0,pos:0,len:0}, | |
}; | |
impl Token { | |
pub fn with_kind(kind: Kind, place: Place) -> Token { | |
Token{ | |
kind : kind, | |
value : None, | |
place : place, | |
} | |
} | |
pub fn with_kind_value(kind: Kind, place: Place, value: String) -> Token { | |
Token{ | |
kind : kind, | |
value : Some(value), | |
place : place, | |
} | |
} | |
} | |
/// Matcher macros | |
/// | |
#[macro_export] | |
macro_rules! match_kind { | |
($k:expr,$p:pat) => { | |
match $k { | |
$p => true, | |
_ => false, | |
} | |
}; | |
} | |
#[macro_export] | |
macro_rules! match_token_kind { | |
($t:expr,$p:pat) => { | |
match $t { | |
Token{kind:$p,value:_,place:_} => true, | |
_ => false, | |
} | |
}; | |
} | |
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