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use crate::token::*;
pub use rules::*;
peg::parser! {
pub grammar rules() for str {
pub rule token_stream() -> Vec<Token<'input>>
= _ tokens:(token() ** _) _ { tokens }
pub rule token() -> Token<'input>
= literal:literal() { Token::Literal(literal) }
/ ident:ident() { Token::Ident(ident) }
/ punct:punct() { Token::Punct(punct) }
rule ident() -> &'input str
= $(
['a'..='z' | 'A' ..='Z' | '_' ]
['a'..='z' | 'A' ..='Z' | '_' | '0'..='9']*
)
rule punct() -> Punct
= ch:punct_char() spacing:spacing() { Punct(ch, spacing) }
rule punct_char() -> char
= !literal() !ident() !__ ch:[_] { ch }
rule spacing() -> Spacing
= &punct_char() { Spacing::Joint }
/ { Spacing::Alone }
rule literal() -> Literal<'input>
= content:$(['0'..='9'] ['0'..='9' | 'a'..='z' | 'A'..='Z' | '_']*) {
Literal { content, kind: LiteralKind::Number }
}
/ "\"" content:$(string_char()*) "\"" {
Literal { content, kind: LiteralKind::String }
}
/ "r\"" content:$([^'"']*) "\"" {
Literal { content, kind: LiteralKind::RawString }
}
/ "```" newline() content:$((!"```" [_])+) "```" {
Literal { content, kind: LiteralKind::ScriptString }
}
rule string_char()
= [^'"' | '\\']
/ "\\" [_]
/// Mandatory whitespace
rule __
= ([' ' | '\t'] / quiet!{newline()} / quiet!{comment()})+
/// Optional whitespace
rule _
= quiet!{__?}
rule comment()
= "//" (!newline() [_])* (newline() / ![_])
/ "/*" (!"*/" [_])* "*/"
rule newline()
= ['\n' | '\r']
}
}
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