diff options
Diffstat (limited to 'src/tools/rust-analyzer/crates/hir-def/src/per_ns.rs')
-rw-r--r-- | src/tools/rust-analyzer/crates/hir-def/src/per_ns.rs | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/per_ns.rs b/src/tools/rust-analyzer/crates/hir-def/src/per_ns.rs new file mode 100644 index 000000000..bf5bf10c4 --- /dev/null +++ b/src/tools/rust-analyzer/crates/hir-def/src/per_ns.rs @@ -0,0 +1,95 @@ +//! In rust, it is possible to have a value, a type and a macro with the same +//! name without conflicts. +//! +//! `PerNs` (per namespace) captures this. + +use crate::{item_scope::ItemInNs, visibility::Visibility, MacroId, ModuleDefId}; + +#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] +pub struct PerNs { + pub types: Option<(ModuleDefId, Visibility)>, + pub values: Option<(ModuleDefId, Visibility)>, + pub macros: Option<(MacroId, Visibility)>, +} + +impl Default for PerNs { + fn default() -> Self { + PerNs { types: None, values: None, macros: None } + } +} + +impl PerNs { + pub fn none() -> PerNs { + PerNs { types: None, values: None, macros: None } + } + + pub fn values(t: ModuleDefId, v: Visibility) -> PerNs { + PerNs { types: None, values: Some((t, v)), macros: None } + } + + pub fn types(t: ModuleDefId, v: Visibility) -> PerNs { + PerNs { types: Some((t, v)), values: None, macros: None } + } + + pub fn both(types: ModuleDefId, values: ModuleDefId, v: Visibility) -> PerNs { + PerNs { types: Some((types, v)), values: Some((values, v)), macros: None } + } + + pub fn macros(macro_: MacroId, v: Visibility) -> PerNs { + PerNs { types: None, values: None, macros: Some((macro_, v)) } + } + + pub fn is_none(&self) -> bool { + self.types.is_none() && self.values.is_none() && self.macros.is_none() + } + + pub fn take_types(self) -> Option<ModuleDefId> { + self.types.map(|it| it.0) + } + + pub fn take_types_vis(self) -> Option<(ModuleDefId, Visibility)> { + self.types + } + + pub fn take_values(self) -> Option<ModuleDefId> { + self.values.map(|it| it.0) + } + + pub fn take_macros(self) -> Option<MacroId> { + self.macros.map(|it| it.0) + } + + pub fn filter_visibility(self, mut f: impl FnMut(Visibility) -> bool) -> PerNs { + let _p = profile::span("PerNs::filter_visibility"); + PerNs { + types: self.types.filter(|(_, v)| f(*v)), + values: self.values.filter(|(_, v)| f(*v)), + macros: self.macros.filter(|(_, v)| f(*v)), + } + } + + pub fn with_visibility(self, vis: Visibility) -> PerNs { + PerNs { + types: self.types.map(|(it, _)| (it, vis)), + values: self.values.map(|(it, _)| (it, vis)), + macros: self.macros.map(|(it, _)| (it, vis)), + } + } + + pub fn or(self, other: PerNs) -> PerNs { + PerNs { + types: self.types.or(other.types), + values: self.values.or(other.values), + macros: self.macros.or(other.macros), + } + } + + pub fn iter_items(self) -> impl Iterator<Item = ItemInNs> { + let _p = profile::span("PerNs::iter_items"); + self.types + .map(|it| ItemInNs::Types(it.0)) + .into_iter() + .chain(self.values.map(|it| ItemInNs::Values(it.0)).into_iter()) + .chain(self.macros.map(|it| ItemInNs::Macros(it.0)).into_iter()) + } +} |