96 lines
2.8 KiB
Rust
96 lines
2.8 KiB
Rust
//! In rust, it is possible to have a value, a type and a macro with the same
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//! name without conflicts.
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//!
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//! `PerNs` (per namespace) captures this.
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use hir_expand::MacroDefId;
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use crate::{item_scope::ItemInNs, visibility::Visibility, ModuleDefId};
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#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
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pub struct PerNs {
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pub types: Option<(ModuleDefId, Visibility)>,
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pub values: Option<(ModuleDefId, Visibility)>,
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pub macros: Option<(MacroDefId, Visibility)>,
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}
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impl Default for PerNs {
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fn default() -> Self {
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PerNs { types: None, values: None, macros: None }
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}
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}
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impl PerNs {
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pub fn none() -> PerNs {
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PerNs { types: None, values: None, macros: None }
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}
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pub fn values(t: ModuleDefId, v: Visibility) -> PerNs {
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PerNs { types: None, values: Some((t, v)), macros: None }
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}
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pub fn types(t: ModuleDefId, v: Visibility) -> PerNs {
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PerNs { types: Some((t, v)), values: None, macros: None }
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}
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pub fn both(types: ModuleDefId, values: ModuleDefId, v: Visibility) -> PerNs {
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PerNs { types: Some((types, v)), values: Some((values, v)), macros: None }
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}
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pub fn macros(macro_: MacroDefId, v: Visibility) -> PerNs {
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PerNs { types: None, values: None, macros: Some((macro_, v)) }
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}
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pub fn is_none(&self) -> bool {
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self.types.is_none() && self.values.is_none() && self.macros.is_none()
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}
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pub fn take_types(self) -> Option<ModuleDefId> {
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self.types.map(|it| it.0)
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}
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pub fn take_types_vis(self) -> Option<(ModuleDefId, Visibility)> {
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self.types
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}
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pub fn take_values(self) -> Option<ModuleDefId> {
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self.values.map(|it| it.0)
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}
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pub fn take_macros(self) -> Option<MacroDefId> {
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self.macros.map(|it| it.0)
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}
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pub fn filter_visibility(self, mut f: impl FnMut(Visibility) -> bool) -> PerNs {
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PerNs {
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types: self.types.filter(|(_, v)| f(*v)),
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values: self.values.filter(|(_, v)| f(*v)),
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macros: self.macros.filter(|(_, v)| f(*v)),
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}
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}
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pub fn with_visibility(self, vis: Visibility) -> PerNs {
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PerNs {
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types: self.types.map(|(it, _)| (it, vis)),
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values: self.values.map(|(it, _)| (it, vis)),
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macros: self.macros.map(|(it, _)| (it, vis)),
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}
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}
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pub fn or(self, other: PerNs) -> PerNs {
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PerNs {
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types: self.types.or(other.types),
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values: self.values.or(other.values),
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macros: self.macros.or(other.macros),
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}
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}
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pub fn iter_items(self) -> impl Iterator<Item = ItemInNs> {
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self.types
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.map(|it| ItemInNs::Types(it.0))
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.into_iter()
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.chain(self.values.map(|it| ItemInNs::Values(it.0)).into_iter())
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.chain(self.macros.map(|it| ItemInNs::Macros(it.0)).into_iter())
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}
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}
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