2018-12-24 14:00:14 -06:00
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use std::sync::Arc;
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2019-01-01 15:30:00 -06:00
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use ra_db::Cancelable;
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2018-12-28 12:34:58 -06:00
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use ra_syntax::ast::{self, NameOwner, StructFlavor};
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2018-12-24 12:07:48 -06:00
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use crate::{
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2019-01-01 15:30:00 -06:00
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DefId, Name, AsName,
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2018-12-28 12:34:58 -06:00
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db::HirDatabase,
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type_ref::TypeRef,
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2018-12-24 12:07:48 -06:00
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};
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pub struct Struct {
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def_id: DefId,
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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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2018-12-24 14:00:14 -06:00
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pub fn def_id(&self) -> DefId {
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self.def_id
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}
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2018-12-25 06:54:38 -06:00
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pub fn variant_data(&self, db: &impl HirDatabase) -> Cancelable<Arc<VariantData>> {
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Ok(db.struct_data(self.def_id)?.variant_data.clone())
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}
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2018-12-24 14:00:14 -06:00
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pub fn struct_data(&self, db: &impl HirDatabase) -> Cancelable<Arc<StructData>> {
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Ok(db.struct_data(self.def_id)?)
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}
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2018-12-28 12:34:58 -06:00
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pub fn name(&self, db: &impl HirDatabase) -> Cancelable<Option<Name>> {
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Ok(db.struct_data(self.def_id)?.name.clone())
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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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name: Option<Name>,
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variant_data: Arc<VariantData>,
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}
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impl StructData {
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pub(crate) 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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2018-12-28 12:34:58 -06:00
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pub fn name(&self) -> Option<&Name> {
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self.name.as_ref()
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}
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pub fn variant_data(&self) -> &Arc<VariantData> {
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&self.variant_data
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}
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}
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pub struct Enum {
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def_id: DefId,
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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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2018-12-24 14:00:14 -06:00
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pub fn def_id(&self) -> DefId {
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self.def_id
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}
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2018-12-28 12:34:58 -06:00
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pub fn name(&self, db: &impl HirDatabase) -> Cancelable<Option<Name>> {
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Ok(db.enum_data(self.def_id)?.name.clone())
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}
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pub fn variants(&self, db: &impl HirDatabase) -> Cancelable<Vec<(Name, Arc<VariantData>)>> {
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Ok(db.enum_data(self.def_id)?.variants.clone())
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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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name: Option<Name>,
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variants: Vec<(Name, Arc<VariantData>)>,
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}
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impl EnumData {
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pub(crate) 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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}
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/// A single field of an enum variant or struct
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct StructField {
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name: Name,
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type_ref: TypeRef,
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}
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impl StructField {
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pub fn name(&self) -> Name {
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self.name.clone()
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}
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pub fn type_ref(&self) -> &TypeRef {
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&self.type_ref
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}
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}
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2018-12-24 12:07:48 -06:00
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/// Fields of an enum variant or struct
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub enum VariantData {
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Struct(Vec<StructField>),
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Tuple(Vec<StructField>),
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Unit,
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}
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impl VariantData {
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pub 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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pub fn fields(&self) -> &[StructField] {
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match *self {
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VariantData::Struct(ref fields) | VariantData::Tuple(ref fields) => fields,
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_ => &[],
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}
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}
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pub fn is_struct(&self) -> bool {
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if let VariantData::Struct(..) = *self {
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true
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} else {
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false
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}
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}
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pub fn is_tuple(&self) -> bool {
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if let VariantData::Tuple(..) = *self {
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true
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} else {
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false
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}
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}
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pub fn is_unit(&self) -> bool {
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if let VariantData::Unit = *self {
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true
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} else {
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false
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}
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}
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}
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