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Reduce indirections.

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This commit is contained in:
Stephen Chung
2021-03-23 20:04:54 +08:00
parent f9429c06f9
commit 0d7f2c16cc
6 changed files with 137 additions and 127 deletions
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178
src/token.rs
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@@ -381,6 +381,99 @@ pub enum Token {
}
impl Token {
/// Get the syntax of the token if it is a keyword.
///
/// # Panics
///
/// Panics if the token is not a keyword.
pub fn keyword_syntax(&self) -> &'static str {
use Token::*;
match self {
LeftBrace => "{",
RightBrace => "}",
LeftParen => "(",
RightParen => ")",
LeftBracket => "[",
RightBracket => "]",
Plus => "+",
UnaryPlus => "+",
Minus => "-",
UnaryMinus => "-",
Multiply => "*",
Divide => "/",
SemiColon => ";",
Colon => ":",
DoubleColon => "::",
DoubleArrow => "=>",
Underscore => "_",
Comma => ",",
Period => ".",
MapStart => "#{",
Equals => "=",
True => "true",
False => "false",
Let => "let",
Const => "const",
If => "if",
Else => "else",
Switch => "switch",
Do => "do",
While => "while",
Until => "until",
Loop => "loop",
For => "for",
In => "in",
LessThan => "<",
GreaterThan => ">",
Bang => "!",
LessThanEqualsTo => "<=",
GreaterThanEqualsTo => ">=",
EqualsTo => "==",
NotEqualsTo => "!=",
Pipe => "|",
Or => "||",
Ampersand => "&",
And => "&&",
Continue => "continue",
Break => "break",
Return => "return",
Throw => "throw",
Try => "try",
Catch => "catch",
PlusAssign => "+=",
MinusAssign => "-=",
MultiplyAssign => "*=",
DivideAssign => "/=",
LeftShiftAssign => "<<=",
RightShiftAssign => ">>=",
AndAssign => "&=",
OrAssign => "|=",
XOrAssign => "^=",
LeftShift => "<<",
RightShift => ">>",
XOr => "^",
Modulo => "%",
ModuloAssign => "%=",
PowerOf => "**",
PowerOfAssign => "**=",
#[cfg(not(feature = "no_function"))]
Fn => "fn",
#[cfg(not(feature = "no_function"))]
Private => "private",
#[cfg(not(feature = "no_module"))]
Import => "import",
#[cfg(not(feature = "no_module"))]
Export => "export",
#[cfg(not(feature = "no_module"))]
As => "as",
t => unreachable!("{:?} is not a keyword", t),
}
}
/// Get the syntax of the token.
pub fn syntax(&self) -> Cow<'static, str> {
use Token::*;
@@ -399,90 +492,9 @@ impl Token {
LexError(err) => err.to_string().into(),
Comment(s) => s.clone().into(),
token => match token {
LeftBrace => "{",
RightBrace => "}",
LeftParen => "(",
RightParen => ")",
LeftBracket => "[",
RightBracket => "]",
Plus => "+",
UnaryPlus => "+",
Minus => "-",
UnaryMinus => "-",
Multiply => "*",
Divide => "/",
SemiColon => ";",
Colon => ":",
DoubleColon => "::",
DoubleArrow => "=>",
Underscore => "_",
Comma => ",",
Period => ".",
MapStart => "#{",
Equals => "=",
True => "true",
False => "false",
Let => "let",
Const => "const",
If => "if",
Else => "else",
Switch => "switch",
Do => "do",
While => "while",
Until => "until",
Loop => "loop",
For => "for",
In => "in",
LessThan => "<",
GreaterThan => ">",
Bang => "!",
LessThanEqualsTo => "<=",
GreaterThanEqualsTo => ">=",
EqualsTo => "==",
NotEqualsTo => "!=",
Pipe => "|",
Or => "||",
Ampersand => "&",
And => "&&",
Continue => "continue",
Break => "break",
Return => "return",
Throw => "throw",
Try => "try",
Catch => "catch",
PlusAssign => "+=",
MinusAssign => "-=",
MultiplyAssign => "*=",
DivideAssign => "/=",
LeftShiftAssign => "<<=",
RightShiftAssign => ">>=",
AndAssign => "&=",
OrAssign => "|=",
XOrAssign => "^=",
LeftShift => "<<",
RightShift => ">>",
XOr => "^",
Modulo => "%",
ModuloAssign => "%=",
PowerOf => "**",
PowerOfAssign => "**=",
EOF => "{EOF}".into(),
#[cfg(not(feature = "no_function"))]
Fn => "fn",
#[cfg(not(feature = "no_function"))]
Private => "private",
#[cfg(not(feature = "no_module"))]
Import => "import",
#[cfg(not(feature = "no_module"))]
Export => "export",
#[cfg(not(feature = "no_module"))]
As => "as",
EOF => "{EOF}",
t => unreachable!("operator should be matched in outer scope: {:?}", t),
}
.into(),
token => token.keyword_syntax().into(),
}
}