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internal: Show mir eval errors on hover with debug env var set

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This commit is contained in:
Lukas Wirth 2024-12-15 16:35:17 +01:00
parent fc18d263aa
commit 15239f612d
5 changed files with 113 additions and 97 deletions
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100
crates/hir/src/lib.rs
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@ -2649,24 +2649,31 @@ impl Const {
Type::from_value_def(db, self.id)
}
/// Evaluate the constant and return the result as a string.
///
/// This function is intended for IDE assistance, different from [`Const::render_eval`].
pub fn eval(self, db: &dyn HirDatabase) -> Result<String, ConstEvalError> {
let c = db.const_eval(self.id.into(), Substitution::empty(Interner), None)?;
Ok(format!("{}", c.display(db, self.krate(db).edition(db))))
/// Evaluate the constant.
pub fn eval(self, db: &dyn HirDatabase) -> Result<EvaluatedConst, ConstEvalError> {
db.const_eval(self.id.into(), Substitution::empty(Interner), None)
.map(|it| EvaluatedConst { const_: it, def: self.id.into() })
}
}
impl HasVisibility for Const {
fn visibility(&self, db: &dyn HirDatabase) -> Visibility {
db.const_visibility(self.id)
}
}
pub struct EvaluatedConst {
def: DefWithBodyId,
const_: hir_ty::Const,
}
impl EvaluatedConst {
pub fn render(&self, db: &dyn HirDatabase, edition: Edition) -> String {
format!("{}", self.const_.display(db, edition))
}
/// Evaluate the constant and return the result as a string, with more detailed information.
///
/// This function is intended for user-facing display.
pub fn render_eval(
self,
db: &dyn HirDatabase,
edition: Edition,
) -> Result<String, ConstEvalError> {
let c = db.const_eval(self.id.into(), Substitution::empty(Interner), None)?;
let data = &c.data(Interner);
pub fn render_debug(&self, db: &dyn HirDatabase) -> Result<String, MirEvalError> {
let data = self.const_.data(Interner);
if let TyKind::Scalar(s) = data.ty.kind(Interner) {
if matches!(s, Scalar::Int(_) | Scalar::Uint(_)) {
if let hir_ty::ConstValue::Concrete(c) = &data.value {
@ -2689,17 +2696,7 @@ impl Const {
}
}
}
if let Ok(s) = mir::render_const_using_debug_impl(db, self.id.into(), &c) {
Ok(s)
} else {
Ok(format!("{}", c.display(db, edition)))
}
}
}
impl HasVisibility for Const {
fn visibility(&self, db: &dyn HirDatabase) -> Visibility {
db.const_visibility(self.id)
mir::render_const_using_debug_impl(db, self.def, &self.const_)
}
}
@ -2729,51 +2726,10 @@ impl Static {
Type::from_value_def(db, self.id)
}
/// Evaluate the static and return the result as a string.
///
/// This function is intended for IDE assistance, different from [`Static::render_eval`].
pub fn eval(self, db: &dyn HirDatabase) -> Result<String, ConstEvalError> {
let c = db.const_eval(self.id.into(), Substitution::empty(Interner), None)?;
Ok(format!("{}", c.display(db, self.krate(db).edition(db))))
}
/// Evaluate the static and return the result as a string, with more detailed information.
///
/// This function is intended for user-facing display.
pub fn render_eval(
self,
db: &dyn HirDatabase,
edition: Edition,
) -> Result<String, ConstEvalError> {
let c = db.const_eval(self.id.into(), Substitution::empty(Interner), None)?;
let data = &c.data(Interner);
if let TyKind::Scalar(s) = data.ty.kind(Interner) {
if matches!(s, Scalar::Int(_) | Scalar::Uint(_)) {
if let hir_ty::ConstValue::Concrete(c) = &data.value {
if let hir_ty::ConstScalar::Bytes(b, _) = &c.interned {
let value = u128::from_le_bytes(mir::pad16(b, false));
let value_signed =
i128::from_le_bytes(mir::pad16(b, matches!(s, Scalar::Int(_))));
let mut result = if let Scalar::Int(_) = s {
value_signed.to_string()
} else {
value.to_string()
};
if value >= 10 {
format_to!(result, " ({value:#X})");
return Ok(result);
} else {
return Ok(result);
}
}
}
}
}
if let Ok(s) = mir::render_const_using_debug_impl(db, self.id.into(), &c) {
Ok(s)
} else {
Ok(format!("{}", c.display(db, edition)))
}
/// Evaluate the static initializer.
pub fn eval(self, db: &dyn HirDatabase) -> Result<EvaluatedConst, ConstEvalError> {
db.const_eval(self.id.into(), Substitution::empty(Interner), None)
.map(|it| EvaluatedConst { const_: it, def: self.id.into() })
}
}