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use string_interner::DefaultSymbol;
use once_cell::sync::OnceCell;
use crate::lexer::{LexerBuilder, Token};
use crate::lexer::rules::{SingleCharRule, MultiCharRule};
use crate::lexer::rules::keywords::KeywordRule;
use crate::lexer::rules::literals::*;
use crate::lexer::rules::literals::string::*;
pub type IntType = i128;
pub type FloatType = f64;
pub type InternSymbol = DefaultSymbol;
pub static COMMENT_CHAR: char = '#';
pub static NESTED_COMMENT_START: &str = "#{";
pub static NESTED_COMMENT_END: &str = "}#";
static ESCAPE_SEQUENCES: OnceCell<Vec<Box<dyn EscapeSequence>>> = OnceCell::new();
pub fn all_escape_sequences() -> impl Iterator<Item=&'static dyn EscapeSequence> {
ESCAPE_SEQUENCES.get_or_init(|| {
let escapes: Vec<Box<dyn EscapeSequence>> = vec![
Box::new(CharMapEscape::new('0', "\x00")),
Box::new(CharMapEscape::new('\\', "\\")),
Box::new(CharMapEscape::new('\'', "\'")),
Box::new(CharMapEscape::new('\"', "\"")),
Box::new(CharMapEscape::new('t', "\t")),
Box::new(CharMapEscape::new('n', "\n")),
Box::new(CharMapEscape::new('r', "\r")),
Box::new(HexByteEscape::new()),
];
escapes
})
.iter().map(|esc| &**esc)
}
pub fn create_default_lexer_rules() -> LexerBuilder {
LexerBuilder::new()
.add_rule(SingleCharRule::new(Token::OpenParen, '('))
.add_rule(SingleCharRule::new(Token::CloseParen, ')'))
.add_rule(SingleCharRule::new(Token::OpenBrace, '{'))
.add_rule(SingleCharRule::new(Token::CloseBrace, '}'))
.add_rule(SingleCharRule::new(Token::OpenSquare, '['))
.add_rule(SingleCharRule::new(Token::CloseSquare, ']'))
.add_rule(SingleCharRule::new(Token::Comma, ','))
.add_rule(SingleCharRule::new(Token::Colon, ':'))
.add_rule(SingleCharRule::new(Token::Semicolon, ';'))
.add_rule(SingleCharRule::new(Token::Decorator, '@'))
.add_rule(MultiCharRule::new(Token::Ellipsis, "..."))
.add_rule(SingleCharRule::new(Token::OpAssign, '='))
.add_rule(SingleCharRule::new(Token::OpAccess, '.'))
.add_rule(MultiCharRule::new(Token::OpExp, "**"))
.add_rule(SingleCharRule::new(Token::OpAdd, '+'))
.add_rule(SingleCharRule::new(Token::OpSub, '-'))
.add_rule(SingleCharRule::new(Token::OpMul, '*'))
.add_rule(SingleCharRule::new(Token::OpDiv, '/'))
.add_rule(SingleCharRule::new(Token::OpMod, '%'))
.add_rule(SingleCharRule::new(Token::OpInv, '~'))
.add_rule(SingleCharRule::new(Token::OpAnd, '&'))
.add_rule(SingleCharRule::new(Token::OpOr, '|'))
.add_rule(SingleCharRule::new(Token::OpXor, '^'))
.add_rule(SingleCharRule::new(Token::OpLT, '<'))
.add_rule(SingleCharRule::new(Token::OpGT, '>'))
.add_rule(MultiCharRule::new(Token::OpLE, "<="))
.add_rule(MultiCharRule::new(Token::OpGE, ">="))
.add_rule(MultiCharRule::new(Token::OpEQ, "=="))
.add_rule(MultiCharRule::new(Token::OpNE, "!="))
.add_rule(MultiCharRule::new(Token::OpAddAssign, "+="))
.add_rule(MultiCharRule::new(Token::OpSubAssign, "-="))
.add_rule(MultiCharRule::new(Token::OpMulAssign, "*="))
.add_rule(MultiCharRule::new(Token::OpDivAssign, "/="))
.add_rule(MultiCharRule::new(Token::OpModAssign, "%="))
.add_rule(MultiCharRule::new(Token::OpAndAssign, "&="))
.add_rule(MultiCharRule::new(Token::OpOrAssign, "|="))
.add_rule(MultiCharRule::new(Token::OpXorAssign, "^="))
.add_rule(MultiCharRule::new(Token::OpLShiftAssign, "<<="))
.add_rule(MultiCharRule::new(Token::OpRShiftAssign, ">>="))
.add_rule(MultiCharRule::new(Token::OpLShift, "<<"))
.add_rule(MultiCharRule::new(Token::OpRShift, ">>"))
.add_rule(KeywordRule::new(Token::And, "and"))
.add_rule(KeywordRule::new(Token::Or, "or"))
.add_rule(KeywordRule::new(Token::Not, "not"))
.add_rule(KeywordRule::new(Token::True, "true"))
.add_rule(KeywordRule::new(Token::False, "false"))
.add_rule(KeywordRule::new(Token::Nil, "nil"))
.add_rule(KeywordRule::new(Token::Let, "let"))
.add_rule(KeywordRule::new(Token::Var, "var"))
.add_rule(KeywordRule::new(Token::NonLocal, "nonlocal"))
.add_rule(KeywordRule::new(Token::Del, "del"))
.add_rule(KeywordRule::new(Token::Begin, "begin"))
.add_rule(KeywordRule::new(Token::If, "if"))
.add_rule(KeywordRule::new(Token::Then, "then"))
.add_rule(KeywordRule::new(Token::Elif, "elif"))
.add_rule(KeywordRule::new(Token::Else, "else"))
.add_rule(KeywordRule::new(Token::Loop, "loop"))
.add_rule(KeywordRule::new(Token::While, "while"))
.add_rule(KeywordRule::new(Token::For, "for"))
.add_rule(KeywordRule::new(Token::In, "in"))
.add_rule(KeywordRule::new(Token::Do, "do"))
.add_rule(KeywordRule::new(Token::Continue, "continue"))
.add_rule(KeywordRule::new(Token::Break, "break"))
.add_rule(KeywordRule::new(Token::Return, "return"))
.add_rule(KeywordRule::new(Token::Fun, "fun"))
.add_rule(KeywordRule::new(Token::Class, "class"))
.add_rule(KeywordRule::new(Token::Echo, "echo"))
.add_rule(KeywordRule::new(Token::Assert, "assert"))
.add_rule(KeywordRule::new(Token::End, "end"))
.add_rule(IdentifierRule::new())
.add_rule(IntegerLiteralRule::new())
.add_rule(HexIntegerLiteralRule::new())
.add_rule(FloatLiteralRule::new())
.add_rule(StringLiteralRule::new(all_escape_sequences()))
.add_rule(LabelRule::new("::"))
}
