1 files changed, 0 insertions, 189 deletions

diff --git a/crates/ra_hir/src/ty/infer/pat.rs b/crates/ra_hir/src/ty/infer/pat.rs
deleted file mode 100644
index a14774607..000000000
--- a/crates/ra_hir/src/ty/infer/pat.rs
+++ /dev/null
@@ -1,189 +0,0 @@
-//! Type inference for patterns.
-
-use std::iter::repeat;
-use std::sync::Arc;
-
-use hir_def::{
-    expr::{BindingAnnotation, Pat, PatId, RecordFieldPat},
-    path::Path,
-    type_ref::Mutability,
-};
-use hir_expand::name::Name;
-use test_utils::tested_by;
-
-use super::{BindingMode, InferenceContext};
-use crate::{
-    db::HirDatabase,
-    ty::{utils::variant_data, Substs, Ty, TypeCtor, TypeWalk},
-};
-
-impl<'a, D: HirDatabase> InferenceContext<'a, D> {
-    fn infer_tuple_struct_pat(
-        &mut self,
-        path: Option<&Path>,
-        subpats: &[PatId],
-        expected: &Ty,
-        default_bm: BindingMode,
-    ) -> Ty {
-        let (ty, def) = self.resolve_variant(path);
-        let var_data = def.map(|it| variant_data(self.db, it));
-        self.unify(&ty, expected);
-
-        let substs = ty.substs().unwrap_or_else(Substs::empty);
-
-        let field_tys = def.map(|it| self.db.field_types(it.into())).unwrap_or_default();
-
-        for (i, &subpat) in subpats.iter().enumerate() {
-            let expected_ty = var_data
-                .as_ref()
-                .and_then(|d| d.field(&Name::new_tuple_field(i)))
-                .map_or(Ty::Unknown, |field| field_tys[field].clone())
-                .subst(&substs);
-            let expected_ty = self.normalize_associated_types_in(expected_ty);
-            self.infer_pat(subpat, &expected_ty, default_bm);
-        }
-
-        ty
-    }
-
-    fn infer_record_pat(
-        &mut self,
-        path: Option<&Path>,
-        subpats: &[RecordFieldPat],
-        expected: &Ty,
-        default_bm: BindingMode,
-        id: PatId,
-    ) -> Ty {
-        let (ty, def) = self.resolve_variant(path);
-        let var_data = def.map(|it| variant_data(self.db, it));
-        if let Some(variant) = def {
-            self.write_variant_resolution(id.into(), variant);
-        }
-
-        self.unify(&ty, expected);
-
-        let substs = ty.substs().unwrap_or_else(Substs::empty);
-
-        let field_tys = def.map(|it| self.db.field_types(it.into())).unwrap_or_default();
-        for subpat in subpats {
-            let matching_field = var_data.as_ref().and_then(|it| it.field(&subpat.name));
-            let expected_ty =
-                matching_field.map_or(Ty::Unknown, |field| field_tys[field].clone()).subst(&substs);
-            let expected_ty = self.normalize_associated_types_in(expected_ty);
-            self.infer_pat(subpat.pat, &expected_ty, default_bm);
-        }
-
-        ty
-    }
-
-    pub(super) fn infer_pat(
-        &mut self,
-        pat: PatId,
-        mut expected: &Ty,
-        mut default_bm: BindingMode,
-    ) -> Ty {
-        let body = Arc::clone(&self.body); // avoid borrow checker problem
-
-        let is_non_ref_pat = match &body[pat] {
-            Pat::Tuple(..)
-            | Pat::TupleStruct { .. }
-            | Pat::Record { .. }
-            | Pat::Range { .. }
-            | Pat::Slice { .. } => true,
-            // FIXME: Path/Lit might actually evaluate to ref, but inference is unimplemented.
-            Pat::Path(..) | Pat::Lit(..) => true,
-            Pat::Wild | Pat::Bind { .. } | Pat::Ref { .. } | Pat::Missing => false,
-        };
-        if is_non_ref_pat {
-            while let Some((inner, mutability)) = expected.as_reference() {
-                expected = inner;
-                default_bm = match default_bm {
-                    BindingMode::Move => BindingMode::Ref(mutability),
-                    BindingMode::Ref(Mutability::Shared) => BindingMode::Ref(Mutability::Shared),
-                    BindingMode::Ref(Mutability::Mut) => BindingMode::Ref(mutability),
-                }
-            }
-        } else if let Pat::Ref { .. } = &body[pat] {
-            tested_by!(match_ergonomics_ref);
-            // When you encounter a `&pat` pattern, reset to Move.
-            // This is so that `w` is by value: `let (_, &w) = &(1, &2);`
-            default_bm = BindingMode::Move;
-        }
-
-        // Lose mutability.
-        let default_bm = default_bm;
-        let expected = expected;
-
-        let ty = match &body[pat] {
-            Pat::Tuple(ref args) => {
-                let expectations = match expected.as_tuple() {
-                    Some(parameters) => &*parameters.0,
-                    _ => &[],
-                };
-                let expectations_iter = expectations.iter().chain(repeat(&Ty::Unknown));
-
-                let inner_tys = args
-                    .iter()
-                    .zip(expectations_iter)
-                    .map(|(&pat, ty)| self.infer_pat(pat, ty, default_bm))
-                    .collect();
-
-                Ty::apply(TypeCtor::Tuple { cardinality: args.len() as u16 }, Substs(inner_tys))
-            }
-            Pat::Ref { pat, mutability } => {
-                let expectation = match expected.as_reference() {
-                    Some((inner_ty, exp_mut)) => {
-                        if *mutability != exp_mut {
-                            // FIXME: emit type error?
-                        }
-                        inner_ty
-                    }
-                    _ => &Ty::Unknown,
-                };
-                let subty = self.infer_pat(*pat, expectation, default_bm);
-                Ty::apply_one(TypeCtor::Ref(*mutability), subty)
-            }
-            Pat::TupleStruct { path: p, args: subpats } => {
-                self.infer_tuple_struct_pat(p.as_ref(), subpats, expected, default_bm)
-            }
-            Pat::Record { path: p, args: fields } => {
-                self.infer_record_pat(p.as_ref(), fields, expected, default_bm, pat)
-            }
-            Pat::Path(path) => {
-                // FIXME use correct resolver for the surrounding expression
-                let resolver = self.resolver.clone();
-                self.infer_path(&resolver, &path, pat.into()).unwrap_or(Ty::Unknown)
-            }
-            Pat::Bind { mode, name: _, subpat } => {
-                let mode = if mode == &BindingAnnotation::Unannotated {
-                    default_bm
-                } else {
-                    BindingMode::convert(*mode)
-                };
-                let inner_ty = if let Some(subpat) = subpat {
-                    self.infer_pat(*subpat, expected, default_bm)
-                } else {
-                    expected.clone()
-                };
-                let inner_ty = self.insert_type_vars_shallow(inner_ty);
-
-                let bound_ty = match mode {
-                    BindingMode::Ref(mutability) => {
-                        Ty::apply_one(TypeCtor::Ref(mutability), inner_ty.clone())
-                    }
-                    BindingMode::Move => inner_ty.clone(),
-                };
-                let bound_ty = self.resolve_ty_as_possible(&mut vec![], bound_ty);
-                self.write_pat_ty(pat, bound_ty);
-                return inner_ty;
-            }
-            _ => Ty::Unknown,
-        };
-        // use a new type variable if we got Ty::Unknown here
-        let ty = self.insert_type_vars_shallow(ty);
-        self.unify(&ty, expected);
-        let ty = self.resolve_ty_as_possible(&mut vec![], ty);
-        self.write_pat_ty(pat, ty.clone());
-        ty
-    }
-}