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Explain TOMBSTONE and EOF

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This commit is contained in:
Aleksey Kladov 2018-01-28 11:43:59 +03:00
parent aff82e5ee1
commit 52104f7d25
2 changed files with 12 additions and 4 deletions
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8
src/bin/gen.rs
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@ -51,8 +51,12 @@ impl Grammar {
write!(acc, " {},\n", scream(kind)).unwrap();
}
acc.push_str("\n");
acc.push_str(" TOMBSTONE = !0 - 1,\n");
acc.push_str(" EOF = !0,\n");
acc.push_str(" // Technical SyntaxKinds: they appear temporally during parsing,\n");
acc.push_str(" // but never end up in the final tree\n");
acc.push_str(" #[doc(hidden)]\n");
acc.push_str(" TOMBSTONE,\n");
acc.push_str(" #[doc(hidden)]\n");
acc.push_str(" EOF,\n");
acc.push_str("}\n");
acc.push_str("pub(crate) use self::SyntaxKind::*;\n");
acc.push_str("\n");

8
src/syntax_kinds.rs
View file

@ -92,8 +92,12 @@ pub enum SyntaxKind {
ALIAS,
VISIBILITY,
TOMBSTONE = !0 - 1,
EOF = !0,
// Technical SyntaxKinds: they appear temporally during parsing,
// but never end up in the final tree
#[doc(hidden)]
TOMBSTONE,
#[doc(hidden)]
EOF,
}
pub(crate) use self::SyntaxKind::*;