32 lines
643 B
Rust
32 lines
643 B
Rust
|
/* char.rs
|
||
|
|
* Eryn Wells <eryn@erynwells.me>
|
||
|
|
*/
|
||
|
|
|
||
|
|
use lexer::charset;
|
||
|
|
|
||
|
|
pub trait Lexable {
|
||
|
|
fn is_left_paren(&self) -> bool;
|
||
|
|
fn is_right_paren(&self) -> bool;
|
||
|
|
fn is_identifier_initial(&self) -> bool;
|
||
|
|
fn is_identifier_subsequent(&self) -> bool;
|
||
|
|
}
|
||
|
|
|
||
|
|
impl Lexable for char {
|
||
|
|
fn is_left_paren(&self) -> bool {
|
||
|
|
self == &'('
|
||
|
|
}
|
||
|
|
|
||
|
|
fn is_right_paren(&self) -> bool {
|
||
|
|
self == &')'
|
||
|
|
}
|
||
|
|
|
||
|
|
fn is_identifier_initial(&self) -> bool {
|
||
|
|
charset::identifier_initials().contains(&self)
|
||
|
|
}
|
||
|
|
|
||
|
|
fn is_identifier_subsequent(&self) -> bool {
|
||
|
|
charset::identifier_subsequents().contains(&self)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|