43 lines
740 B
Rust
43 lines
740 B
Rust
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/// # Token
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use std::fmt;
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pub enum Kind {
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LeftParen,
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RightParen,
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Identifier,
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}
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pub struct Token {
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kind: Kind,
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value: String,
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}
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impl Token {
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fn new(kind: Kind, value: String) -> Token {
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Token { kind: kind, value: value, }
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}
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}
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//
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// Display
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//
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impl fmt::Display for Kind {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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let s = match *self {
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Kind::LeftParen => "LeftParen",
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Kind::RightParen => "RightParen",
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Kind::Identifier => "Identifier",
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};
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write!(f, "{}", s)
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}
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}
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impl fmt::Display for Token {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "({}, \"{}\")", self.kind, self.value)
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}
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}
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