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Merge #11925

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11925: internal: Add and use `HirFormatter::write_{str,char}` r=Veykril a=lnicola

Saves slightly over 3 KB of `text`, but comparing the total with that from two weeks ago in #11776, this is a losing battle (we're 951 KB larger).

```
   text	   data	    bss	    dec	    hex	filename
24693512	1542704	   4424	26240640	1906680	rust-analyzer-baseline
24690216	1542112	   4424	26236752	1905750	rust-analyzer-pr
```


Co-authored-by: Laurențiu Nicola <lnicola@dend.ro>
This commit is contained in:
bors[bot] 2022-04-07 14:38:46 +00:00 committed by GitHub
commit 12f803d1e3
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 64 additions and 55 deletions
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109
crates/hir/src/display.rs
View File

@ -27,16 +27,16 @@ impl HirDisplay for Function {
let data = f.db.function_data(self.id);
write_visibility(self.module(f.db).id, self.visibility(f.db), f)?;
if data.is_default() {
write!(f, "default ")?;
f.write_str("default ")?;
}
if data.is_const() {
write!(f, "const ")?;
f.write_str("const ")?;
}
if data.is_async() {
write!(f, "async ")?;
f.write_str("async ")?;
}
if data.is_unsafe() {
write!(f, "unsafe ")?;
f.write_str("unsafe ")?;
}
if let Some(abi) = &data.abi {
// FIXME: String escape?
@ -46,23 +46,23 @@ impl HirDisplay for Function {
write_generic_params(GenericDefId::FunctionId(self.id), f)?;
write!(f, "(")?;
f.write_char('(')?;
let write_self_param = |ty: &TypeRef, f: &mut HirFormatter| match ty {
TypeRef::Path(p) if p.is_self_type() => write!(f, "self"),
TypeRef::Path(p) if p.is_self_type() => f.write_str("self"),
TypeRef::Reference(inner, lifetime, mut_) if matches!(&**inner,TypeRef::Path(p) if p.is_self_type()) =>
{
write!(f, "&")?;
f.write_char('&')?;
if let Some(lifetime) = lifetime {
write!(f, "{} ", lifetime.name)?;
}
if let hir_def::type_ref::Mutability::Mut = mut_ {
write!(f, "mut ")?;
f.write_str("mut ")?;
}
write!(f, "self")
f.write_str("self")
}
_ => {
write!(f, "self: ")?;
f.write_str("self: ")?;
ty.hir_fmt(f)
}
};
@ -70,7 +70,7 @@ impl HirDisplay for Function {
let mut first = true;
for (name, type_ref) in &data.params {
if !first {
write!(f, ", ")?;
f.write_str(", ")?;
} else {
first = false;
if data.has_self_param() {
@ -80,7 +80,7 @@ impl HirDisplay for Function {
}
match name {
Some(name) => write!(f, "{}: ", name)?,
None => write!(f, "_: ")?,
None => f.write_str("_: ")?,
}
// FIXME: Use resolved `param.ty` or raw `type_ref`?
// The former will ignore lifetime arguments currently.
@ -88,10 +88,10 @@ impl HirDisplay for Function {
}
if data.is_varargs() {
write!(f, ", ...")?;
f.write_str(", ...")?;
}
write!(f, ")")?;
f.write_char(')')?;
// `FunctionData::ret_type` will be `::core::future::Future<Output = ...>` for async fns.
// Use ugly pattern match to strip the Future trait.
@ -117,7 +117,7 @@ impl HirDisplay for Function {
match ret_type {
TypeRef::Tuple(tup) if tup.is_empty() => {}
ty => {
write!(f, " -> ")?;
f.write_str(" -> ")?;
ty.hir_fmt(f)?;
}
}
@ -141,7 +141,7 @@ impl HirDisplay for Adt {
impl HirDisplay for Struct {
fn hir_fmt(&self, f: &mut HirFormatter) -> Result<(), HirDisplayError> {
write_visibility(self.module(f.db).id, self.visibility(f.db), f)?;
write!(f, "struct ")?;
f.write_str("struct ")?;
write!(f, "{}", self.name(f.db))?;
let def_id = GenericDefId::AdtId(AdtId::StructId(self.id));
write_generic_params(def_id, f)?;
@ -153,7 +153,7 @@ impl HirDisplay for Struct {
impl HirDisplay for Enum {
fn hir_fmt(&self, f: &mut HirFormatter) -> Result<(), HirDisplayError> {
write_visibility(self.module(f.db).id, self.visibility(f.db), f)?;
write!(f, "enum ")?;
f.write_str("enum ")?;
write!(f, "{}", self.name(f.db))?;
let def_id = GenericDefId::AdtId(AdtId::EnumId(self.id));
write_generic_params(def_id, f)?;
@ -165,7 +165,7 @@ impl HirDisplay for Enum {
impl HirDisplay for Union {
fn hir_fmt(&self, f: &mut HirFormatter) -> Result<(), HirDisplayError> {
write_visibility(self.module(f.db).id, self.visibility(f.db), f)?;
write!(f, "union ")?;
f.write_str("union ")?;
write!(f, "{}", self.name(f.db))?;
let def_id = GenericDefId::AdtId(AdtId::UnionId(self.id));
write_generic_params(def_id, f)?;
@ -189,34 +189,34 @@ impl HirDisplay for Variant {
match &*data {
VariantData::Unit => {}
VariantData::Tuple(fields) => {
write!(f, "(")?;
f.write_char('(')?;
let mut first = true;
for (_, field) in fields.iter() {
if first {
first = false;
} else {
write!(f, ", ")?;
f.write_str(", ")?;
}
// Enum variant fields must be pub.
field.type_ref.hir_fmt(f)?;
}
write!(f, ")")?;
f.write_char(')')?;
}
VariantData::Record(fields) => {
write!(f, " {{")?;
f.write_str(" {{")?;
let mut first = true;
for (_, field) in fields.iter() {
if first {
first = false;
write!(f, " ")?;
f.write_char(' ')?;
} else {
write!(f, ", ")?;
f.write_str(", ")?;
}
// Enum variant fields must be pub.
write!(f, "{}: ", field.name)?;
field.type_ref.hir_fmt(f)?;
}
write!(f, " }}")?;
f.write_str(" }}")?;
}
}
Ok(())
@ -301,7 +301,7 @@ fn write_generic_params(def: GenericDefId, f: &mut HirFormatter) -> Result<(), H
{
return Ok(());
}
write!(f, "<")?;
f.write_char('<')?;
let mut first = true;
let mut delim = |f: &mut HirFormatter| {
@ -309,7 +309,7 @@ fn write_generic_params(def: GenericDefId, f: &mut HirFormatter) -> Result<(), H
first = false;
Ok(())
} else {
write!(f, ", ")
f.write_str(", ")
}
};
for (_, lifetime) in params.lifetimes.iter() {
@ -326,7 +326,7 @@ fn write_generic_params(def: GenericDefId, f: &mut HirFormatter) -> Result<(), H
delim(f)?;
write!(f, "{}", name)?;
if let Some(default) = &ty.default {
write!(f, " = ")?;
f.write_str(" = ")?;
default.hir_fmt(f)?;
}
}
@ -339,7 +339,7 @@ fn write_generic_params(def: GenericDefId, f: &mut HirFormatter) -> Result<(), H
}
}
write!(f, ">")?;
f.write_char('>')?;
Ok(())
}
@ -370,31 +370,30 @@ fn write_where_clause(def: GenericDefId, f: &mut HirFormatter) -> Result<(), Hir
WherePredicateTypeTarget::TypeOrConstParam(id) => {
match &params.type_or_consts[*id].name() {
Some(name) => write!(f, "{}", name),
None => write!(f, "{{unnamed}}"),
None => f.write_str("{{unnamed}}"),
}
}
};
write!(f, "\nwhere")?;
f.write_str("\nwhere")?;
for (pred_idx, pred) in params.where_predicates.iter().enumerate() {
let prev_pred =
if pred_idx == 0 { None } else { Some(&params.where_predicates[pred_idx - 1]) };
let new_predicate = |f: &mut HirFormatter| {
write!(f, "{}", if pred_idx == 0 { "\n " } else { ",\n " })
};
let new_predicate =
|f: &mut HirFormatter| f.write_str(if pred_idx == 0 { "\n " } else { ",\n " });
match pred {
WherePredicate::TypeBound { target, .. } if is_unnamed_type_target(target) => {}
WherePredicate::TypeBound { target, bound } => {
if matches!(prev_pred, Some(WherePredicate::TypeBound { target: target_, .. }) if target_ == target)
{
write!(f, " + ")?;
f.write_str(" + ")?;
} else {
new_predicate(f)?;
write_target(target, f)?;
write!(f, ": ")?;
f.write_str(": ")?;
}
bound.hir_fmt(f)?;
}
@ -413,19 +412,19 @@ fn write_where_clause(def: GenericDefId, f: &mut HirFormatter) -> Result<(), Hir
Some(WherePredicate::ForLifetime { lifetimes: lifetimes_, target: target_, .. })
if lifetimes_ == lifetimes && target_ == target,
) {
write!(f, " + ")?;
f.write_str(" + ")?;
} else {
new_predicate(f)?;
write!(f, "for<")?;
f.write_str("for<")?;
for (idx, lifetime) in lifetimes.iter().enumerate() {
if idx != 0 {
write!(f, ", ")?;
f.write_str(", ")?;
}
write!(f, "{}", lifetime)?;
}
write!(f, "> ")?;
f.write_str("> ")?;
write_target(target, f)?;
write!(f, ": ")?;
f.write_str(": ")?;
}
bound.hir_fmt(f)?;
}
@ -433,7 +432,7 @@ fn write_where_clause(def: GenericDefId, f: &mut HirFormatter) -> Result<(), Hir
}
// End of final predicate. There must be at least one predicate here.
write!(f, ",")?;
f.write_char(',')?;
Ok(())
}
@ -442,10 +441,10 @@ impl HirDisplay for Const {
fn hir_fmt(&self, f: &mut HirFormatter) -> Result<(), HirDisplayError> {
write_visibility(self.module(f.db).id, self.visibility(f.db), f)?;
let data = f.db.const_data(self.id);
write!(f, "const ")?;
f.write_str("const ")?;
match &data.name {
Some(name) => write!(f, "{}: ", name)?,
None => write!(f, "_: ")?,
None => f.write_str("_: ")?,
}
data.type_ref.hir_fmt(f)?;
Ok(())
@ -456,9 +455,9 @@ impl HirDisplay for Static {
fn hir_fmt(&self, f: &mut HirFormatter) -> Result<(), HirDisplayError> {
write_visibility(self.module(f.db).id, self.visibility(f.db), f)?;
let data = f.db.static_data(self.id);
write!(f, "static ")?;
f.write_str("static ")?;
if data.mutable {
write!(f, "mut ")?;
f.write_str("mut ")?;
}
write!(f, "{}: ", &data.name)?;
data.type_ref.hir_fmt(f)?;
@ -471,10 +470,10 @@ impl HirDisplay for Trait {
write_visibility(self.module(f.db).id, self.visibility(f.db), f)?;
let data = f.db.trait_data(self.id);
if data.is_unsafe {
write!(f, "unsafe ")?;
f.write_str("unsafe ")?;
}
if data.is_auto {
write!(f, "auto ")?;
f.write_str("auto ")?;
}
write!(f, "trait {}", data.name)?;
let def_id = GenericDefId::TraitId(self.id);
@ -490,11 +489,11 @@ impl HirDisplay for TypeAlias {
let data = f.db.type_alias_data(self.id);
write!(f, "type {}", data.name)?;
if !data.bounds.is_empty() {
write!(f, ": ")?;
f.write_str(": ")?;
f.write_joined(&data.bounds, " + ")?;
}
if let Some(ty) = &data.type_ref {
write!(f, " = ")?;
f.write_str(" = ")?;
ty.hir_fmt(f)?;
}
Ok(())
@ -508,9 +507,9 @@ impl HirDisplay for Module {
Some(name) => write!(f, "mod {}", name),
None if self.is_crate_root(f.db) => match self.krate().display_name(f.db) {
Some(name) => write!(f, "extern crate {}", name),
None => write!(f, "extern crate {{unknown}}"),
None => f.write_str("extern crate {{unknown}}"),
},
None => write!(f, "mod {{unnamed}}"),
None => f.write_str("mod {{unnamed}}"),
}
}
}
@ -518,9 +517,9 @@ impl HirDisplay for Module {
impl HirDisplay for Macro {
fn hir_fmt(&self, f: &mut HirFormatter) -> Result<(), HirDisplayError> {
match self.id {
hir_def::MacroId::Macro2Id(_) => write!(f, "macro"),
hir_def::MacroId::MacroRulesId(_) => write!(f, "macro_rules!"),
hir_def::MacroId::ProcMacroId(_) => write!(f, "proc_macro"),
hir_def::MacroId::Macro2Id(_) => f.write_str("macro"),
hir_def::MacroId::MacroRulesId(_) => f.write_str("macro_rules!"),
hir_def::MacroId::ProcMacroId(_) => f.write_str("proc_macro"),
}?;
write!(f, " {}", self.name(f.db))
}

10
crates/hir_ty/src/display.rs
View File

@ -172,6 +172,16 @@ impl<'a> HirFormatter<'a> {
self.fmt.write_str(&self.buf).map_err(HirDisplayError::from)
}
pub fn write_str(&mut self, s: &str) -> Result<(), HirDisplayError> {
self.fmt.write_str(s)?;
Ok(())
}
pub fn write_char(&mut self, c: char) -> Result<(), HirDisplayError> {
self.fmt.write_char(c)?;
Ok(())
}
pub fn should_truncate(&self) -> bool {
match self.max_size {
Some(max_size) => self.curr_size >= max_size,