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Add basic support for array lengths in types

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This recognizes `let a = [1u8, 2, 3]` as having type `[u8; 3]` instead
of the previous `[u8; _]`. Byte strings and `[0u8; 2]` kinds of range
array declarations are unsupported as before.

I don't know why a bunch of our rustc tests had single quotes inside
strings un-escaped by `UPDATE_EXPECT=1 cargo t`, but I don't think it's
bad? Maybe something in a nightly?
This commit is contained in:
Jade 2021-05-11 05:06:33 -07:00
parent 77f0c92fd8
commit dc63fea427
12 changed files with 155 additions and 110 deletions
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7
crates/hir_ty/src/lib.rs
View file

@ -12,6 +12,7 @@ mod chalk_db;
mod chalk_ext;
mod infer;
mod interner;
mod consts;
mod lower;
mod mapping;
mod op;
@ -39,7 +40,7 @@ use chalk_ir::{
};
use hir_def::{expr::ExprId, type_ref::Rawness, TypeParamId};
use crate::{db::HirDatabase, display::HirDisplay, utils::generics};
use crate::{consts::ConstScalar, db::HirDatabase, display::HirDisplay, utils::generics};
pub use autoderef::autoderef;
pub use builder::TyBuilder;
@ -250,7 +251,9 @@ pub fn dummy_usize_const() -> Const {
let usize_ty = chalk_ir::TyKind::Scalar(Scalar::Uint(UintTy::Usize)).intern(&Interner);
chalk_ir::ConstData {
ty: usize_ty,
value: chalk_ir::ConstValue::Concrete(chalk_ir::ConcreteConst { interned: () }),
value: chalk_ir::ConstValue::Concrete(chalk_ir::ConcreteConst {
interned: ConstScalar::Unknown,
}),
}
.intern(&Interner)
}