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11 Commits

Author SHA1 Message Date
Erik Eckstein
ab1b343dad use new llvm::Optional API 
`getValue` -> `value`
`getValueOr` -> `value_or`
`hasValue` -> `has_value`
`map` -> `transform`

The old API will be deprecated in the rebranch.
To avoid merge conflicts, use the new API already in the main branch.

rdar://102362022
 2022-11-21 19:44:24 +01:00
Holly Borla
c4b946195e [AST] Replace the "type sequence" terminology with "parameter pack". 2022-10-10 16:28:13 -07:00
Holly Borla
38a2c8218b [Requirement] Rename RequirementKind::SameCount to SameShape. 2022-10-06 20:48:40 -07:00
Holly Borla
f4bfce6448 [RequirementMachine] Map same-shape requriements to rewrite rules. 
A same-shape requirement 'length(T...) == length(U...)' becomes a rewrite
rule 'T.[shape] => U.[shape]'. Reduced shape rules will drop the [shape]
term from each side of the rule, and create a same-shape requirement
between the two type parameter packs.
 2022-10-06 20:38:31 -07:00
Holly Borla
ae5ebba2c1 [RequirementMachine] Add same-length requirement inference for pack 
expansion types.
 2022-10-06 20:38:30 -07:00
Slava Pestov
5c32f2136e AST: Introduce RequirementKind::SameCount 2022-08-23 11:12:00 -04:00
Slava Pestov
9d96ed940f AST: Rename 'canonical wrt. generic signature' to 'reduced' 
We had two notions of canonical types, one is the structural property
where it doesn't contain sugared types, the other one where it does
not contain reducible type parameters with respect to a generic
signature.

Rename the second one to a 'reduced type'.
 2022-08-09 12:46:31 -04:00
Slava Pestov
ae56af36d2 RequirementMachine: Workaround invariant violation when requirement signature completion fails 
- If P is declared to inherit from Q and Q has an associated type named U, then
  isValidTypeInContext() returns true for a type 'T.U' where 'T' is a generic
  parameter conforming to P, and 'U' is the unresolved DependentMemberType, and
  the type 'T.U' will simplify to the term 'T.[P:U]'.

- However, if completion failed while building the rewrite system for P's
  requirement signature, then the requirement signature for P won't have a
  rule [P].[Q] => [P]. As a result, getTypeForTerm() will fail when given
  'T.[P:U]', because the property map entry for 'T' will not contain a
  conformance to Q.

Work around this by manually adding protocol inheritance rules when building
a signature from a protocol whose requirement signature failed to compute.

This was triggered by the test case I added in the previous commit to
test/Generics/non_confluent.swift.
 2022-05-09 21:21:35 -04:00
Josh Soref
81d3ad76ac Spelling ast (#42463) 
* spelling: accessor

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* spelling: accommodates

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* spelling: belongs

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* spelling: conformance

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* spelling: context

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* spelling: conversion

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* spelling: correspondence

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* spelling: declarations

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* spelling: declared

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* spelling: existence

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* spelling: existential

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* spelling: explicit

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* spelling: expressed

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* spelling: foreign

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* spelling: implicit

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* spelling: instance

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* spelling: interchangeable

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* spelling: interface

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* spelling: invalid

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* spelling: namespace

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* spelling: necessary

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* spelling: nonexistent

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* spelling: not

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* spelling: number

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* spelling: obtains

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* spelling: overridden

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* spelling: parameter

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* spelling: precede

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* spelling: preceding

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* spelling: property

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* spelling: protocol

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* spelling: qualified

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* spelling: recognized

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* spelling: recursively

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* spelling: simplified

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* spelling: something

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* spelling: specializations

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* spelling: stripped

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* spelling: structure

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* spelling: substitution

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* spelling: the

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* spelling: transform

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* spelling: transformed

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* spelling: transitively

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* spelling: transparent

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* spelling: typecheck

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* spelling: unknown

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* spelling: unlabeled

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* spelling: unqualified

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* spelling: whether

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* spelling: with

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* spelling: scanner

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Co-authored-by: Josh Soref <jsoref@users.noreply.github.com>
 2022-04-21 12:57:16 -07:00
Slava Pestov
4446f2afcf RequirementMachine: Move some code out of RuleBuilder and into RequirementSignatureRequest 2022-03-22 15:02:06 -04:00
Slava Pestov
ef1636a462 RequirementMachine: Split off RuleBuilder.{cpp,h} from RequirementLowering.{cpp,h} 2022-03-16 12:24:20 -04:00