pub fn tokenize(text: &str) -> (Vec<Token>, Vec<SyntaxError>) {
    // non-empty string is a precondtion of `rustc_lexer::strip_shebang()`.
    if text.is_empty() {
        return Default::default();
    }

    let mut tokens = Vec::new();
    let mut errors = Vec::new();

    let mut offset: usize = rustc_lexer::strip_shebang(text)
        .map(|shebang_len| {
            tokens.push(Token { kind: SHEBANG, len: TextUnit::from_usize(shebang_len) });
            shebang_len
        })
        .unwrap_or(0);

    let text_without_shebang = &text[offset..];

    for rustc_token in rustc_lexer::tokenize(text_without_shebang) {
        let token_len = TextUnit::from_usize(rustc_token.len);
        let token_range = TextRange::offset_len(TextUnit::from_usize(offset), token_len);

        let (syntax_kind, error) =
            rustc_token_kind_to_syntax_kind(&rustc_token.kind, &text[token_range]);

        tokens.push(Token { kind: syntax_kind, len: token_len });

        if let Some(error) = error {
            errors.push(SyntaxError::new(SyntaxErrorKind::TokenizeError(error), token_range));
        }

        offset += rustc_token.len;
    }

    (tokens, errors)
}
/// Break a string up into its component tokens.
/// Beware that it checks for shebang first and its length contributes to resulting
/// tokens offsets.
Break a string up into its component tokens.
Beware that it checks for shebang first and its length contributes to resulting
tokens offsets.
Break a string up into its component tokens . Beware that it checks for shebang first and its length contributes to resulting tokens offsets .
pub fn tokenize(text: &str) -> (Vec<Token>, Vec<SyntaxError>) {
    // non-empty string is a precondtion of `rustc_lexer::strip_shebang()`.
    if text.is_empty() {
        return Default::default();
    }
    let mut tokens = Vec::new();
    let mut errors = Vec::new();
    let mut offset: usize = rustc_lexer::strip_shebang(text)
        .map(|shebang_len| {
            tokens.push(Token { kind: SHEBANG, len: TextUnit::from_usize(shebang_len) });
            shebang_len
        })
        .unwrap_or(0);
    let text_without_shebang = &text[offset..];
    for rustc_token in rustc_lexer::tokenize(text_without_shebang) {
        let token_len = TextUnit::from_usize(rustc_token.len);
        let token_range = TextRange::offset_len(TextUnit::from_usize(offset), token_len);
        let (syntax_kind, error) =
            rustc_token_kind_to_syntax_kind(&rustc_token.kind, &text[token_range]);
        tokens.push(Token { kind: syntax_kind, len: token_len });
        if let Some(error) = error {
            errors.push(SyntaxError::new(SyntaxErrorKind::TokenizeError(error), token_range));
        }
        offset += rustc_token.len;
    }
    (tokens, errors)
}
pub fn tokenize ( text : & str ) -> ( Vec < Token > , Vec < SyntaxError > ) { // non-empty string is a precondtion of `rustc_lexer::strip_shebang()`. if text . is_empty ( ) { return Default :: default ( ) ; } let mut tokens = Vec :: new ( ) ; let mut errors = Vec :: new ( ) ; let mut offset : usize = rustc_lexer :: strip_shebang ( text ) . map ( | shebang_len | { tokens . push ( Token { kind : SHEBANG , len : TextUnit :: from_usize ( shebang_len ) } ) ; shebang_len } ) . unwrap_or ( 0 ) ; let text_without_shebang = & text [ offset .. ] ; for rustc_token in rustc_lexer :: tokenize ( text_without_shebang ) { let token_len = TextUnit :: from_usize ( rustc_token . len ) ; let token_range = TextRange :: offset_len ( TextUnit :: from_usize ( offset ) , token_len ) ; let ( syntax_kind , error ) = rustc_token_kind_to_syntax_kind ( & rustc_token . kind , & text [ token_range ] ) ; tokens . push ( Token { kind : syntax_kind , len : token_len } ) ; if let Some ( error ) = error { errors . push ( SyntaxError :: new ( SyntaxErrorKind :: TokenizeError ( error ) , token_range ) ) ; } offset += rustc_token . len ; } ( tokens , errors ) }
Break a string up into its component tokens.
Break a string up into its component tokens .
text
&str