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/// Tree-sitter-compatible parse status flags modeled as link metadata.
#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
pub struct LinkFlags {
bits: u8,
}
impl LinkFlags {
const IS_ERROR: u8 = 0b0001;
const HAS_ERROR: u8 = 0b0010;
const IS_MISSING: u8 = 0b0100;
const IS_EXTRA: u8 = 0b1000;
/// Clean link flags.
#[must_use]
pub const fn clean() -> Self {
Self { bits: 0 }
}
/// Flags for an error link.
#[must_use]
pub const fn error() -> Self {
Self {
bits: Self::IS_ERROR,
}
}
/// Flags for a link that contains an error below it.
#[must_use]
pub const fn containing_error() -> Self {
Self {
bits: Self::HAS_ERROR,
}
}
/// Flags for a missing link.
#[must_use]
pub const fn missing() -> Self {
Self {
bits: Self::IS_MISSING,
}
}
/// Flags for an extra/trivia link.
#[must_use]
pub const fn extra() -> Self {
Self {
bits: Self::IS_EXTRA,
}
}
/// Returns flags with the error bit enabled.
#[must_use]
pub const fn with_error(mut self) -> Self {
self.bits |= Self::IS_ERROR;
self
}
/// Returns flags with the containing-error bit enabled.
#[must_use]
pub const fn with_containing_error(mut self) -> Self {
self.bits |= Self::HAS_ERROR;
self
}
/// Returns flags with the missing bit enabled.
#[must_use]
pub const fn with_missing(mut self) -> Self {
self.bits |= Self::IS_MISSING;
self
}
/// Returns flags with the extra/trivia bit enabled.
#[must_use]
pub const fn with_extra(mut self) -> Self {
self.bits |= Self::IS_EXTRA;
self
}
/// Whether this link is an error link.
#[must_use]
pub const fn is_error(self) -> bool {
self.bits & Self::IS_ERROR != 0
}
/// Whether this link contains an error below it.
#[must_use]
pub const fn has_error(self) -> bool {
self.bits & Self::HAS_ERROR != 0
}
/// Whether this link is missing from the source text.
#[must_use]
pub const fn is_missing(self) -> bool {
self.bits & Self::IS_MISSING != 0
}
/// Whether this link is extra source trivia.
#[must_use]
pub const fn is_extra(self) -> bool {
self.bits & Self::IS_EXTRA != 0
}
}