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|
use std::sync::Arc;
use ra_syntax::{SmolStr, ast::{self, NameOwner, StructFlavor}};
use crate::{
DefId, Cancelable,
db::{HirDatabase},
module::Module,
ty::{Ty},
};
pub struct Struct {
def_id: DefId,
}
impl Struct {
pub(crate) fn new(def_id: DefId) -> Self {
Struct { def_id }
}
pub fn def_id(&self) -> DefId {
self.def_id
}
pub fn variant_data(&self, db: &impl HirDatabase) -> Cancelable<Arc<VariantData>> {
Ok(db.struct_data(self.def_id)?.variant_data.clone())
}
pub fn struct_data(&self, db: &impl HirDatabase) -> Cancelable<Arc<StructData>> {
Ok(db.struct_data(self.def_id)?)
}
pub fn name(&self, db: &impl HirDatabase) -> Cancelable<SmolStr> {
Ok(db.struct_data(self.def_id)?.name.clone())
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct StructData {
name: SmolStr,
variant_data: Arc<VariantData>,
}
impl StructData {
pub(crate) fn new(
db: &impl HirDatabase,
module: &Module,
struct_def: ast::StructDef,
) -> Cancelable<StructData> {
let name = struct_def
.name()
.map(|n| n.text())
.unwrap_or(SmolStr::new("[error]"));
let variant_data = VariantData::new(db, module, struct_def.flavor())?;
let variant_data = Arc::new(variant_data);
Ok(StructData { name, variant_data })
}
pub fn name(&self) -> &SmolStr {
&self.name
}
pub fn variant_data(&self) -> &Arc<VariantData> {
&self.variant_data
}
}
pub struct Enum {
def_id: DefId,
}
impl Enum {
pub(crate) fn new(def_id: DefId) -> Self {
Enum { def_id }
}
pub fn def_id(&self) -> DefId {
self.def_id
}
pub fn name(&self, db: &impl HirDatabase) -> Cancelable<SmolStr> {
Ok(db.enum_data(self.def_id)?.name.clone())
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct EnumData {
name: SmolStr,
variants: Vec<(SmolStr, Arc<VariantData>)>,
}
impl EnumData {
pub(crate) fn new(
db: &impl HirDatabase,
module: &Module,
enum_def: ast::EnumDef,
) -> Cancelable<Self> {
let name = enum_def
.name()
.map(|n| n.text())
.unwrap_or(SmolStr::new("[error]"));
let variants = if let Some(evl) = enum_def.variant_list() {
evl.variants()
.map(|v| {
Ok((
v.name()
.map(|n| n.text())
.unwrap_or_else(|| SmolStr::new("[error]")),
Arc::new(VariantData::new(db, module, v.flavor())?),
))
})
.collect::<Cancelable<_>>()?
} else {
Vec::new()
};
Ok(EnumData { name, variants })
}
}
/// A single field of an enum variant or struct
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct StructField {
name: SmolStr,
ty: Ty,
}
/// Fields of an enum variant or struct
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum VariantData {
Struct(Vec<StructField>),
Tuple(Vec<StructField>),
Unit,
}
impl VariantData {
pub fn new(db: &impl HirDatabase, module: &Module, flavor: StructFlavor) -> Cancelable<Self> {
Ok(match flavor {
StructFlavor::Tuple(fl) => {
let fields = fl
.fields()
.enumerate()
.map(|(i, fd)| {
Ok(StructField {
name: SmolStr::new(i.to_string()),
ty: Ty::new_opt(db, &module, fd.type_ref())?,
})
})
.collect::<Cancelable<_>>()?;
VariantData::Tuple(fields)
}
StructFlavor::Named(fl) => {
let fields = fl
.fields()
.map(|fd| {
Ok(StructField {
name: fd
.name()
.map(|n| n.text())
.unwrap_or_else(|| SmolStr::new("[error]")),
ty: Ty::new_opt(db, &module, fd.type_ref())?,
})
})
.collect::<Cancelable<_>>()?;
VariantData::Struct(fields)
}
StructFlavor::Unit => VariantData::Unit,
})
}
pub(crate) fn get_field_ty(&self, field_name: &str) -> Option<Ty> {
self.fields().iter().find(|f| f.name == field_name).map(|f| f.ty.clone())
}
pub fn fields(&self) -> &[StructField] {
match *self {
VariantData::Struct(ref fields) | VariantData::Tuple(ref fields) => fields,
_ => &[],
}
}
pub fn is_struct(&self) -> bool {
if let VariantData::Struct(..) = *self {
true
} else {
false
}
}
pub fn is_tuple(&self) -> bool {
if let VariantData::Tuple(..) = *self {
true
} else {
false
}
}
pub fn is_unit(&self) -> bool {
if let VariantData::Unit = *self {
true
} else {
false
}
}
}
|
