121 lines
3.6 KiB
Rust
121 lines
3.6 KiB
Rust
use std::sync::Arc;
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use ra_db::Cancelable;
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use ra_syntax::ast::{self, NameOwner, StructFlavor, AstNode};
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use crate::{
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DefId, Name, AsName, Struct, Enum, VariantData, StructField, HirDatabase, DefKind,
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type_ref::TypeRef,
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};
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impl Struct {
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pub(crate) fn new(def_id: DefId) -> Self {
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Struct { def_id }
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}
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}
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct StructData {
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pub(crate) name: Option<Name>,
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pub(crate) variant_data: Arc<VariantData>,
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}
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impl StructData {
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fn new(struct_def: &ast::StructDef) -> StructData {
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let name = struct_def.name().map(|n| n.as_name());
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let variant_data = VariantData::new(struct_def.flavor());
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let variant_data = Arc::new(variant_data);
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StructData { name, variant_data }
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}
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pub(crate) fn struct_data_query(
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db: &impl HirDatabase,
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def_id: DefId,
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) -> Cancelable<Arc<StructData>> {
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let def_loc = def_id.loc(db);
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assert!(def_loc.kind == DefKind::Struct);
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let syntax = db.file_item(def_loc.source_item_id);
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let struct_def =
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ast::StructDef::cast(&syntax).expect("struct def should point to StructDef node");
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Ok(Arc::new(StructData::new(struct_def)))
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}
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}
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impl Enum {
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pub(crate) fn new(def_id: DefId) -> Self {
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Enum { def_id }
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}
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}
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct EnumData {
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pub(crate) name: Option<Name>,
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pub(crate) variants: Vec<(Name, Arc<VariantData>)>,
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}
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impl EnumData {
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fn new(enum_def: &ast::EnumDef) -> Self {
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let name = enum_def.name().map(|n| n.as_name());
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let variants = if let Some(evl) = enum_def.variant_list() {
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evl.variants()
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.map(|v| {
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(
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v.name().map(|n| n.as_name()).unwrap_or_else(Name::missing),
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Arc::new(VariantData::new(v.flavor())),
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)
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})
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.collect()
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} else {
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Vec::new()
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};
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EnumData { name, variants }
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}
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pub(crate) fn enum_data_query(
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db: &impl HirDatabase,
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def_id: DefId,
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) -> Cancelable<Arc<EnumData>> {
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let def_loc = def_id.loc(db);
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assert!(def_loc.kind == DefKind::Enum);
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let syntax = db.file_item(def_loc.source_item_id);
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let enum_def = ast::EnumDef::cast(&syntax).expect("enum def should point to EnumDef node");
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Ok(Arc::new(EnumData::new(enum_def)))
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}
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}
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impl VariantData {
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fn new(flavor: StructFlavor) -> Self {
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match flavor {
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StructFlavor::Tuple(fl) => {
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let fields = fl
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.fields()
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.enumerate()
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.map(|(i, fd)| StructField {
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name: Name::tuple_field_name(i),
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type_ref: TypeRef::from_ast_opt(fd.type_ref()),
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})
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.collect();
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VariantData::Tuple(fields)
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}
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StructFlavor::Named(fl) => {
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let fields = fl
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.fields()
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.map(|fd| StructField {
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name: fd.name().map(|n| n.as_name()).unwrap_or_else(Name::missing),
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type_ref: TypeRef::from_ast_opt(fd.type_ref()),
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})
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.collect();
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VariantData::Struct(fields)
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}
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StructFlavor::Unit => VariantData::Unit,
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}
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}
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pub(crate) fn get_field_type_ref(&self, field_name: &Name) -> Option<&TypeRef> {
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self.fields()
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.iter()
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.find(|f| f.name() == field_name)
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.map(|f| f.type_ref())
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}
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}
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