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feat(wgsl-in): parse
diagnostic(…) directives (with no effect)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| //! Functionality for managing [`DiagnosticFilter`]s. | ||
| //! | ||
| //! This functionality is typically used by front ends via [`DiagnosticFilterMap`]. | ||
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| use crate::{Handle, Span}; | ||
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| use indexmap::IndexMap; | ||
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| /// A severity set on a [`DiagnosticFilter`]. | ||
| #[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)] | ||
| pub enum Severity { | ||
| Off, | ||
| Info, | ||
| Warning, | ||
| Error, | ||
| } | ||
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| impl Severity { | ||
| const ERROR: &'static str = "error"; | ||
| const WARNING: &'static str = "warning"; | ||
| const INFO: &'static str = "info"; | ||
| const OFF: &'static str = "off"; | ||
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| /// Convert from a sentinel word in WGSL into its associated [`Severity`], if possible. | ||
| pub fn from_ident(s: &str) -> Option<Self> { | ||
| Some(match s { | ||
| Self::ERROR => Self::Error, | ||
| Self::WARNING => Self::Warning, | ||
| Self::INFO => Self::Info, | ||
| Self::OFF => Self::Off, | ||
| _ => return None, | ||
| }) | ||
| } | ||
| } | ||
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| /// The rule being configured in a [`DiagnosticFilter`]. | ||
| #[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)] | ||
| pub enum DiagnosticTriggeringRule { | ||
| DerivativeUniformity, | ||
| } | ||
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| impl DiagnosticTriggeringRule { | ||
| const DERIVATIVE_UNIFORMITY: &'static str = "derivative_uniformity"; | ||
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| /// Convert from a sentinel word in WGSL into its associated [`DiagnosticTriggeringRule`], if possible. | ||
| pub fn from_ident(s: &str) -> Option<Self> { | ||
| Some(match s { | ||
| Self::DERIVATIVE_UNIFORMITY => Self::DerivativeUniformity, | ||
| _ => return None, | ||
| }) | ||
| } | ||
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| /// Maps this [`DiagnosticTriggeringRule`] into the sentinel word associated with it in WGSL. | ||
| pub const fn to_ident(self) -> &'static str { | ||
| match self { | ||
| Self::DerivativeUniformity => Self::DERIVATIVE_UNIFORMITY, | ||
| } | ||
| } | ||
| } | ||
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| /// A filter that modifies how diagnostics are emitted for shaders. | ||
| /// | ||
| /// <https://www.w3.org/TR/WGSL/#diagnostic-filter> | ||
| #[derive(Clone, Debug)] | ||
| pub struct DiagnosticFilter { | ||
| pub new_severity: Severity, | ||
| pub triggering_rule: DiagnosticTriggeringRule, | ||
| } | ||
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| /// A map of diagnostic filters to their severity and first occurrence's span. | ||
| /// | ||
| /// Intended for front ends' first step into storing parsed [`DiagnosticFilter`]s. | ||
| #[derive(Clone, Debug, Default)] | ||
| pub(crate) struct DiagnosticFilterMap(IndexMap<DiagnosticTriggeringRule, (Severity, Span)>); | ||
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| #[cfg(feature = "wgsl-in")] | ||
| impl DiagnosticFilterMap { | ||
| pub(crate) fn new() -> Self { | ||
| Self::default() | ||
| } | ||
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| /// Add the given `diagnostic_filter` parsed at the given `span` to this map. | ||
| pub(crate) fn add( | ||
| &mut self, | ||
| diagnostic_filter: DiagnosticFilter, | ||
| span: Span, | ||
| ) -> Result<(), ConflictingDiagnosticRuleError> { | ||
| use indexmap::map::Entry; | ||
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| let &mut Self(ref mut diagnostic_filters) = self; | ||
| let DiagnosticFilter { | ||
| new_severity, | ||
| triggering_rule, | ||
| } = diagnostic_filter; | ||
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| match diagnostic_filters.entry(triggering_rule) { | ||
| Entry::Vacant(entry) => { | ||
| entry.insert((new_severity, span)); | ||
| Ok(()) | ||
| } | ||
| Entry::Occupied(entry) => { | ||
| return Err(ConflictingDiagnosticRuleError { | ||
| triggering_rule, | ||
| triggering_rule_spans: [entry.get().1, span], | ||
| }) | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| /// An error yielded by [`DiagnosticFilterMap::add`]. | ||
| #[cfg(feature = "wgsl-in")] | ||
| #[derive(Clone, Debug)] | ||
| pub(crate) struct ConflictingDiagnosticRuleError { | ||
| pub triggering_rule: DiagnosticTriggeringRule, | ||
| pub triggering_rule_spans: [Span; 2], | ||
| } | ||
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| /// Represents a single link in a linked list of [`DiagnosticFilter`]s backed by a | ||
| /// [`crate::Arena`]. | ||
| #[derive(Clone, Debug)] | ||
| pub struct DiagnosticFilterNode { | ||
| pub inner: DiagnosticFilter, | ||
| pub parent: Option<Handle<DiagnosticFilterNode>>, | ||
| } |
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