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Invalid output from token #399

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axelkar opened this issue Jun 28, 2024 · 1 comment
Open

Invalid output from token #399

axelkar opened this issue Jun 28, 2024 · 1 comment
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help wanted Extra attention is needed question Further information is requested

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@axelkar
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axelkar commented Jun 28, 2024

May be related to #181 ?

#[derive(Logos, Debug, Clone, Copy, PartialEq, Eq, Hash)]
#[logos(skip "[ \t\r\n]+")]
pub enum TokenKind2 {
    #[regex(r"/dts-v1")]
    DtsV1,

    // Removing this makes the slash match be `/d` instead of `/dt`
    #[regex(r"/dfoo")]
    Dfoo,

    #[regex(r"/[a-z-]+/")]
    UnknownDirective,

    /// A lex error!!
    Unrecognized,

    #[regex(r#"[a-z-]+"#)]
    Ident,

    #[token("/")]
    Slash,
}

With input /dts-v (plus newline) produces the following output:

Slash "/d" 0..2
Ident "ts-v" 2..6

Should be

Slash "/" 0..1
Ident "dts-v" 1..6

With /dts- or /dts-vv it just errors?

@axelkar
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axelkar commented Jun 28, 2024

Here's the graph:

{
    1: ::<skip> (<skip>),
    2: {
        [09-0A] ⇒ 2,
        [0D] ⇒ 2,
          ⇒ 2,
        _ ⇒ 1,
    },
    4: ::DtsV1,
    6: ::Dfoo,
    8: ::UnknownDirective,
    9: / ⇒ 8,
    10: {
        - ⇒ 10,
        [a-z] ⇒ 10,
        _ ⇒ 9,
    },
    13: ::Ident,
    14: {
        - ⇒ 14,
        [a-z] ⇒ 14,
        _ ⇒ 13,
    },
    16: ::Slash,
    26: {
        - ⇒ 10,
        / ⇒ 8,
        [a-e] ⇒ 10,
        f ⇒ 27,
        [g-s] ⇒ 10,
        t ⇒ 30,
        [u-z] ⇒ 10,
    },
    27: [
        oo ⇒ 28,
        _ ⇒ 10*,
    ],
    28: {
        - ⇒ 10,
        / ⇒ 8,
        [a-z] ⇒ 10,
        _ ⇒ 6,
    },
    30: [
        s-v ⇒ 32,
        _ ⇒ 10*,
    ],
    32: {
        - ⇒ 10,
        / ⇒ 8,
        1 ⇒ 4,
        [a-z] ⇒ 10,
    },
    33: {
        - ⇒ 10,
        [a-c] ⇒ 10,
        d ⇒ 26,
        [e-z] ⇒ 10,
        _ ⇒ 16,
    },
    34: {
        [09-0A] ⇒ 2,
        [0D] ⇒ 2,
          ⇒ 2,
        - ⇒ 14,
        / ⇒ 33,
        [a-z] ⇒ 14,
    },
}

@jeertmans jeertmans added help wanted Extra attention is needed question Further information is requested labels Sep 26, 2024
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