Merge #9230

9230: internal: move inference diagnostics to hir r=matklad a=matklad

bors r+
🤖

Co-authored-by: Aleksey Kladov <[email protected]>

4 files changed, 29 insertions, 399 deletions

diff --git a/crates/hir_ty/src/diagnostics.rs b/crates/hir_ty/src/diagnostics.rs
index 283894704..12131d9bc 100644
--- a/crates/hir_ty/src/diagnostics.rs
+++ b/crates/hir_ty/src/diagnostics.rs
@@ -17,7 +17,10 @@ use crate::{
     diagnostics_sink::{Diagnostic, DiagnosticCode, DiagnosticSink},
 };
 
-pub use crate::diagnostics::expr::{record_literal_missing_fields, record_pattern_missing_fields};
+pub use crate::diagnostics::{
+    expr::{record_literal_missing_fields, record_pattern_missing_fields},
+    unsafe_check::missing_unsafe,
+};
 
 pub fn validate_module_item(
     db: &dyn HirDatabase,
@@ -33,38 +36,8 @@ pub fn validate_module_item(
 pub fn validate_body(db: &dyn HirDatabase, owner: DefWithBodyId, sink: &mut DiagnosticSink<'_>) {
     let _p = profile::span("validate_body");
     let infer = db.infer(owner);
-    infer.add_diagnostics(db, owner, sink);
     let mut validator = expr::ExprValidator::new(owner, infer.clone(), sink);
     validator.validate_body(db);
-    let mut validator = unsafe_check::UnsafeValidator::new(owner, infer, sink);
-    validator.validate_body(db);
-}
-
-// Diagnostic: no-such-field
-//
-// This diagnostic is triggered if created structure does not have field provided in record.
-#[derive(Debug)]
-pub struct NoSuchField {
-    pub file: HirFileId,
-    pub field: AstPtr<ast::RecordExprField>,
-}
-
-impl Diagnostic for NoSuchField {
-    fn code(&self) -> DiagnosticCode {
-        DiagnosticCode("no-such-field")
-    }
-
-    fn message(&self) -> String {
-        "no such field".to_string()
-    }
-
-    fn display_source(&self) -> InFile<SyntaxNodePtr> {
-        InFile::new(self.file, self.field.clone().into())
-    }
-
-    fn as_any(&self) -> &(dyn Any + Send + 'static) {
-        self
-    }
 }
 
 // Diagnostic: missing-structure-fields
@@ -247,54 +220,6 @@ impl Diagnostic for RemoveThisSemicolon {
     }
 }
 
-// Diagnostic: break-outside-of-loop
-//
-// This diagnostic is triggered if the `break` keyword is used outside of a loop.
-#[derive(Debug)]
-pub struct BreakOutsideOfLoop {
-    pub file: HirFileId,
-    pub expr: AstPtr<ast::Expr>,
-}
-
-impl Diagnostic for BreakOutsideOfLoop {
-    fn code(&self) -> DiagnosticCode {
-        DiagnosticCode("break-outside-of-loop")
-    }
-    fn message(&self) -> String {
-        "break outside of loop".to_string()
-    }
-    fn display_source(&self) -> InFile<SyntaxNodePtr> {
-        InFile { file_id: self.file, value: self.expr.clone().into() }
-    }
-    fn as_any(&self) -> &(dyn Any + Send + 'static) {
-        self
-    }
-}
-
-// Diagnostic: missing-unsafe
-//
-// This diagnostic is triggered if an operation marked as `unsafe` is used outside of an `unsafe` function or block.
-#[derive(Debug)]
-pub struct MissingUnsafe {
-    pub file: HirFileId,
-    pub expr: AstPtr<ast::Expr>,
-}
-
-impl Diagnostic for MissingUnsafe {
-    fn code(&self) -> DiagnosticCode {
-        DiagnosticCode("missing-unsafe")
-    }
-    fn message(&self) -> String {
-        format!("This operation is unsafe and requires an unsafe function or block")
-    }
-    fn display_source(&self) -> InFile<SyntaxNodePtr> {
-        InFile { file_id: self.file, value: self.expr.clone().into() }
-    }
-    fn as_any(&self) -> &(dyn Any + Send + 'static) {
-        self
-    }
-}
-
 // Diagnostic: mismatched-arg-count
 //
 // This diagnostic is triggered if a function is invoked with an incorrect amount of arguments.
@@ -531,129 +456,6 @@ mod tests {
     }
 
     #[test]
-    fn no_such_field_diagnostics() {
-        check_diagnostics(
-            r#"
-struct S { foo: i32, bar: () }
-impl S {
-    fn new() -> S {
-        S {
-      //^ Missing structure fields:
-      //|    - bar
-            foo: 92,
-            baz: 62,
-          //^^^^^^^ no such field
-        }
-    }
-}
-"#,
-        );
-    }
-    #[test]
-    fn no_such_field_with_feature_flag_diagnostics() {
-        check_diagnostics(
-            r#"
-//- /lib.rs crate:foo cfg:feature=foo
-struct MyStruct {
-    my_val: usize,
-    #[cfg(feature = "foo")]
-    bar: bool,
-}
-
-impl MyStruct {
-    #[cfg(feature = "foo")]
-    pub(crate) fn new(my_val: usize, bar: bool) -> Self {
-        Self { my_val, bar }
-    }
-    #[cfg(not(feature = "foo"))]
-    pub(crate) fn new(my_val: usize, _bar: bool) -> Self {
-        Self { my_val }
-    }
-}
-"#,
-        );
-    }
-
-    #[test]
-    fn no_such_field_enum_with_feature_flag_diagnostics() {
-        check_diagnostics(
-            r#"
-//- /lib.rs crate:foo cfg:feature=foo
-enum Foo {
-    #[cfg(not(feature = "foo"))]
-    Buz,
-    #[cfg(feature = "foo")]
-    Bar,
-    Baz
-}
-
-fn test_fn(f: Foo) {
-    match f {
-        Foo::Bar => {},
-        Foo::Baz => {},
-    }
-}
-"#,
-        );
-    }
-
-    #[test]
-    fn no_such_field_with_feature_flag_diagnostics_on_struct_lit() {
-        check_diagnostics(
-            r#"
-//- /lib.rs crate:foo cfg:feature=foo
-struct S {
-    #[cfg(feature = "foo")]
-    foo: u32,
-    #[cfg(not(feature = "foo"))]
-    bar: u32,
-}
-
-impl S {
-    #[cfg(feature = "foo")]
-    fn new(foo: u32) -> Self {
-        Self { foo }
-    }
-    #[cfg(not(feature = "foo"))]
-    fn new(bar: u32) -> Self {
-        Self { bar }
-    }
-    fn new2(bar: u32) -> Self {
-        #[cfg(feature = "foo")]
-        { Self { foo: bar } }
-        #[cfg(not(feature = "foo"))]
-        { Self { bar } }
-    }
-    fn new2(val: u32) -> Self {
-        Self {
-            #[cfg(feature = "foo")]
-            foo: val,
-            #[cfg(not(feature = "foo"))]
-            bar: val,
-        }
-    }
-}
-"#,
-        );
-    }
-
-    #[test]
-    fn no_such_field_with_type_macro() {
-        check_diagnostics(
-            r#"
-macro_rules! Type { () => { u32 }; }
-struct Foo { bar: Type![] }
-
-impl Foo {
-    fn new() -> Self {
-        Foo { bar: 0 }
-    }
-}
-"#,
-        );
-    }
-
-    #[test]
     fn missing_record_pat_field_diagnostic() {
         check_diagnostics(
             r#"
@@ -735,16 +537,6 @@ pub struct Claims {
     }
 
     #[test]
-    fn break_outside_of_loop() {
-        check_diagnostics(
-            r#"
-fn foo() { break; }
-         //^^^^^ break outside of loop
-"#,
-        );
-    }
-
-    #[test]
     fn missing_semicolon() {
         check_diagnostics(
             r#"
diff --git a/crates/hir_ty/src/diagnostics/unsafe_check.rs b/crates/hir_ty/src/diagnostics/unsafe_check.rs
index c3c483425..a4054cef9 100644
--- a/crates/hir_ty/src/diagnostics/unsafe_check.rs
+++ b/crates/hir_ty/src/diagnostics/unsafe_check.rs
@@ -1,8 +1,6 @@
 //! Provides validations for unsafe code. Currently checks if unsafe functions are missing
 //! unsafe blocks.
 
-use std::sync::Arc;
-
 use hir_def::{
     body::Body,
     expr::{Expr, ExprId, UnaryOp},
@@ -10,52 +8,25 @@ use hir_def::{
     DefWithBodyId,
 };
 
-use crate::{
-    db::HirDatabase, diagnostics::MissingUnsafe, diagnostics_sink::DiagnosticSink, InferenceResult,
-    Interner, TyExt, TyKind,
-};
+use crate::{db::HirDatabase, InferenceResult, Interner, TyExt, TyKind};
 
-pub(super) struct UnsafeValidator<'a, 'b: 'a> {
-    owner: DefWithBodyId,
-    infer: Arc<InferenceResult>,
-    sink: &'a mut DiagnosticSink<'b>,
-}
+pub fn missing_unsafe(db: &dyn HirDatabase, def: DefWithBodyId) -> Vec<ExprId> {
+    let infer = db.infer(def);
 
-impl<'a, 'b> UnsafeValidator<'a, 'b> {
-    pub(super) fn new(
-        owner: DefWithBodyId,
-        infer: Arc<InferenceResult>,
-        sink: &'a mut DiagnosticSink<'b>,
-    ) -> UnsafeValidator<'a, 'b> {
-        UnsafeValidator { owner, infer, sink }
+    // let unsafe_expressions = ;
+    let is_unsafe = match def {
+        DefWithBodyId::FunctionId(it) => db.function_data(it).is_unsafe(),
+        DefWithBodyId::StaticId(_) | DefWithBodyId::ConstId(_) => false,
+    };
+    if is_unsafe {
+        return Vec::new();
     }
 
-    pub(super) fn validate_body(&mut self, db: &dyn HirDatabase) {
-        let def = self.owner;
-        let unsafe_expressions = unsafe_expressions(db, self.infer.as_ref(), def);
-        let is_unsafe = match self.owner {
-            DefWithBodyId::FunctionId(it) => db.function_data(it).is_unsafe(),
-            DefWithBodyId::StaticId(_) | DefWithBodyId::ConstId(_) => false,
-        };
-        if is_unsafe
-            || unsafe_expressions
-                .iter()
-                .filter(|unsafe_expr| !unsafe_expr.inside_unsafe_block)
-                .count()
-                == 0
-        {
-            return;
-        }
-
-        let (_, body_source) = db.body_with_source_map(def);
-        for unsafe_expr in unsafe_expressions {
-            if !unsafe_expr.inside_unsafe_block {
-                if let Ok(in_file) = body_source.as_ref().expr_syntax(unsafe_expr.expr) {
-                    self.sink.push(MissingUnsafe { file: in_file.file_id, expr: in_file.value })
-                }
-            }
-        }
-    }
+    unsafe_expressions(db, &infer, def)
+        .into_iter()
+        .filter(|it| !it.inside_unsafe_block)
+        .map(|it| it.expr)
+        .collect()
 }
 
 pub(crate) struct UnsafeExpr {
@@ -126,92 +97,3 @@ fn walk_unsafe(
         walk_unsafe(unsafe_exprs, db, infer, def, body, child, inside_unsafe_block);
     });
 }
-
-#[cfg(test)]
-mod tests {
-    use crate::diagnostics::tests::check_diagnostics;
-
-    #[test]
-    fn missing_unsafe_diagnostic_with_raw_ptr() {
-        check_diagnostics(
-            r#"
-fn main() {
-    let x = &5 as *const usize;
-    unsafe { let y = *x; }
-    let z = *x;
-}         //^^ This operation is unsafe and requires an unsafe function or block
-"#,
-        )
-    }
-
-    #[test]
-    fn missing_unsafe_diagnostic_with_unsafe_call() {
-        check_diagnostics(
-            r#"
-struct HasUnsafe;
-
-impl HasUnsafe {
-    unsafe fn unsafe_fn(&self) {
-        let x = &5 as *const usize;
-        let y = *x;
-    }
-}
-
-unsafe fn unsafe_fn() {
-    let x = &5 as *const usize;
-    let y = *x;
-}
-
-fn main() {
-    unsafe_fn();
-  //^^^^^^^^^^^ This operation is unsafe and requires an unsafe function or block
-    HasUnsafe.unsafe_fn();
-  //^^^^^^^^^^^^^^^^^^^^^ This operation is unsafe and requires an unsafe function or block
-    unsafe {
-        unsafe_fn();
-        HasUnsafe.unsafe_fn();
-    }
-}
-"#,
-        );
-    }
-
-    #[test]
-    fn missing_unsafe_diagnostic_with_static_mut() {
-        check_diagnostics(
-            r#"
-struct Ty {
-    a: u8,
-}
-
-static mut STATIC_MUT: Ty = Ty { a: 0 };
-
-fn main() {
-    let x = STATIC_MUT.a;
-          //^^^^^^^^^^ This operation is unsafe and requires an unsafe function or block
-    unsafe {
-        let x = STATIC_MUT.a;
-    }
-}
-"#,
-        );
-    }
-
-    #[test]
-    fn no_missing_unsafe_diagnostic_with_safe_intrinsic() {
-        check_diagnostics(
-            r#"
-extern "rust-intrinsic" {
-    pub fn bitreverse(x: u32) -> u32; // Safe intrinsic
-    pub fn floorf32(x: f32) -> f32; // Unsafe intrinsic
-}
-
-fn main() {
-    let _ = bitreverse(12);
-    let _ = floorf32(12.0);
-          //^^^^^^^^^^^^^^ This operation is unsafe and requires an unsafe function or block
-}
-"#,
-        );
-    }
-}
diff --git a/crates/hir_ty/src/infer.rs b/crates/hir_ty/src/infer.rs
index 0e9f777da..2c667da25 100644
--- a/crates/hir_ty/src/infer.rs
+++ b/crates/hir_ty/src/infer.rs
@@ -35,11 +35,9 @@ use stdx::impl_from;
 use syntax::SmolStr;
 
 use super::{DomainGoal, InEnvironment, ProjectionTy, TraitEnvironment, TraitRef, Ty};
-use crate::diagnostics_sink::DiagnosticSink;
 use crate::{
-    db::HirDatabase, fold_tys, infer::diagnostics::InferenceDiagnostic,
-    lower::ImplTraitLoweringMode, to_assoc_type_id, AliasEq, AliasTy, Goal, Interner, Substitution,
-    TyBuilder, TyExt, TyKind,
+    db::HirDatabase, fold_tys, lower::ImplTraitLoweringMode, to_assoc_type_id, AliasEq, AliasTy,
+    Goal, Interner, Substitution, TyBuilder, TyExt, TyKind,
 };
 
 // This lint has a false positive here. See the link below for details.
@@ -111,6 +109,12 @@ pub(crate) struct InferOk {
 pub(crate) struct TypeError;
 pub(crate) type InferResult = Result<InferOk, TypeError>;
 
+#[derive(Debug, PartialEq, Eq, Clone)]
+pub enum InferenceDiagnostic {
+    NoSuchField { expr: ExprId },
+    BreakOutsideOfLoop { expr: ExprId },
+}
+
 /// A mismatch between an expected and an inferred type.
 #[derive(Clone, PartialEq, Eq, Debug, Hash)]
 pub struct TypeMismatch {
@@ -140,7 +144,7 @@ pub struct InferenceResult {
     variant_resolutions: FxHashMap<ExprOrPatId, VariantId>,
     /// For each associated item record what it resolves to
     assoc_resolutions: FxHashMap<ExprOrPatId, AssocItemId>,
-    diagnostics: Vec<InferenceDiagnostic>,
+    pub diagnostics: Vec<InferenceDiagnostic>,
     pub type_of_expr: ArenaMap<ExprId, Ty>,
     /// For each pattern record the type it resolves to.
     ///
@@ -191,14 +195,6 @@ impl InferenceResult {
             _ => None,
         })
     }
-    pub fn add_diagnostics(
-        &self,
-        db: &dyn HirDatabase,
-        owner: DefWithBodyId,
-        sink: &mut DiagnosticSink,
-    ) {
-        self.diagnostics.iter().for_each(|it| it.add_to(db, owner, sink))
-    }
 }
 
 impl Index<ExprId> for InferenceResult {
@@ -804,43 +800,3 @@ impl std::ops::BitOrAssign for Diverges {
         *self = *self | other;
     }
 }
-
-mod diagnostics {
-    use hir_def::{expr::ExprId, DefWithBodyId};
-
-    use crate::{
-        db::HirDatabase,
-        diagnostics::{BreakOutsideOfLoop, NoSuchField},
-        diagnostics_sink::DiagnosticSink,
-    };
-
-    #[derive(Debug, PartialEq, Eq, Clone)]
-    pub(super) enum InferenceDiagnostic {
-        NoSuchField { expr: ExprId },
-        BreakOutsideOfLoop { expr: ExprId },
-    }
-
-    impl InferenceDiagnostic {
-        pub(super) fn add_to(
-            &self,
-            db: &dyn HirDatabase,
-            owner: DefWithBodyId,
-            sink: &mut DiagnosticSink,
-        ) {
-            match self {
-                InferenceDiagnostic::NoSuchField { expr } => {
-                    let (_, source_map) = db.body_with_source_map(owner);
-                    let field = source_map.field_syntax(*expr);
-                    sink.push(NoSuchField { file: field.file_id, field: field.value })
-                }
-                InferenceDiagnostic::BreakOutsideOfLoop { expr } => {
-                    let (_, source_map) = db.body_with_source_map(owner);
-                    let ptr = source_map
-                        .expr_syntax(*expr)
-                        .expect("break outside of loop in synthetic syntax");
-                    sink.push(BreakOutsideOfLoop { file: ptr.file_id, expr: ptr.value })
-                }
-            }
-        }
-    }
-}
diff --git a/crates/hir_ty/src/lib.rs b/crates/hir_ty/src/lib.rs
index 50e0d6333..0c6b19653 100644
--- a/crates/hir_ty/src/lib.rs
+++ b/crates/hir_ty/src/lib.rs
@@ -50,7 +50,7 @@ use crate::{db::HirDatabase, utils::generics};
 pub use autoderef::autoderef;
 pub use builder::TyBuilder;
 pub use chalk_ext::*;
-pub use infer::{could_unify, InferenceResult};
+pub use infer::{could_unify, InferenceDiagnostic, InferenceResult};
 pub use interner::Interner;
 pub use lower::{
     associated_type_shorthand_candidates, callable_item_sig, CallableDefId, ImplTraitLoweringMode,