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Do not explicit generics to generated expressions

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This commit is contained in:
Tavo Annus 2024-06-29 21:22:26 +03:00
parent 1389312871
commit c19458270d
3 changed files with 13 additions and 75 deletions
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78
crates/hir/src/term_search/expr.rs
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@ -9,8 +9,8 @@ use hir_ty::{
use itertools::Itertools;
use crate::{
Adt, AsAssocItem, AssocItemContainer, Const, ConstParam, Field, Function, GenericDef, Local,
ModuleDef, SemanticsScope, Static, Struct, StructKind, Trait, Type, Variant,
Adt, AsAssocItem, AssocItemContainer, Const, ConstParam, Field, Function, Local, ModuleDef,
SemanticsScope, Static, Struct, StructKind, Trait, Type, Variant,
};
/// Helper function to get path to `ModuleDef`
@ -35,43 +35,6 @@ fn mod_item_path_str(
.ok_or(DisplaySourceCodeError::PathNotFound)
}
/// Helper function to get path to `Type`
fn type_path(
sema_scope: &SemanticsScope<'_>,
ty: &Type,
cfg: ImportPathConfig,
) -> Result<String, DisplaySourceCodeError> {
let db = sema_scope.db;
let m = sema_scope.module();
match ty.as_adt() {
Some(adt) => {
let ty_name = ty.display_source_code(db, m.id, true)?;
let mut path = mod_item_path(sema_scope, &ModuleDef::Adt(adt), cfg).unwrap();
path.pop_segment();
let path = path.display(db.upcast()).to_string();
let res = match path.is_empty() {
true => ty_name,
false => format!("{path}::{ty_name}"),
};
Ok(res)
}
None => ty.display_source_code(db, m.id, true),
}
}
/// Helper function to filter out generic parameters that are default
fn non_default_generics(db: &dyn HirDatabase, def: GenericDef, generics: &[Type]) -> Vec<Type> {
def.type_or_const_params(db)
.into_iter()
.filter_map(|it| it.as_type_param(db))
.zip(generics)
.filter(|(tp, arg)| tp.default(db).as_ref() != Some(arg))
.map(|(_, arg)| arg.clone())
.collect()
}
/// Type tree shows how can we get from set of types to some type.
///
/// Consider the following code as an example
@ -208,20 +171,7 @@ impl Expr {
None => Ok(format!("{target_str}.{func_name}({args})")),
}
}
Expr::Variant { variant, generics, params } => {
let generics = non_default_generics(db, variant.parent_enum(db).into(), generics);
let generics_str = match generics.is_empty() {
true => String::new(),
false => {
let generics = generics
.iter()
.map(|it| type_path(sema_scope, it, cfg))
.collect::<Result<Vec<String>, DisplaySourceCodeError>>()?
.into_iter()
.join(", ");
format!("::<{generics}>")
}
};
Expr::Variant { variant, params, .. } => {
let inner = match variant.kind(db) {
StructKind::Tuple => {
let args = params
@ -230,7 +180,7 @@ impl Expr {
.collect::<Result<Vec<String>, DisplaySourceCodeError>>()?
.into_iter()
.join(", ");
format!("{generics_str}({args})")
format!("({args})")
}
StructKind::Record => {
let fields = variant.fields(db);
@ -248,16 +198,15 @@ impl Expr {
.collect::<Result<Vec<String>, DisplaySourceCodeError>>()?
.into_iter()
.join(", ");
format!("{generics_str}{{ {args} }}")
format!("{{ {args} }}")
}
StructKind::Unit => generics_str,
StructKind::Unit => String::new(),
};
let prefix = mod_item_path_str(sema_scope, &ModuleDef::Variant(*variant))?;
Ok(format!("{prefix}{inner}"))
}
Expr::Struct { strukt, generics, params } => {
let generics = non_default_generics(db, (*strukt).into(), generics);
Expr::Struct { strukt, params, .. } => {
let inner = match strukt.kind(db) {
StructKind::Tuple => {
let args = params
@ -286,18 +235,7 @@ impl Expr {
.join(", ");
format!(" {{ {args} }}")
}
StructKind::Unit => match generics.is_empty() {
true => String::new(),
false => {
let generics = generics
.iter()
.map(|it| type_path(sema_scope, it, cfg))
.collect::<Result<Vec<String>, DisplaySourceCodeError>>()?
.into_iter()
.join(", ");
format!("::<{generics}>")
}
},
StructKind::Unit => String::new(),
};
let prefix = mod_item_path_str(sema_scope, &ModuleDef::Adt(Adt::Struct(*strukt)))?;