| commit | 03ec8de24b6fc8a2abeb4013ef603f5cdef9f874 | [log] [tgz] |
|---|---|---|
| author | Robert Griesemer <gri@golang.org> | Fri Jul 02 15:41:28 2021 -0700 |
| committer | Robert Griesemer <gri@golang.org> | Wed Jul 07 23:42:12 2021 +0000 |
| tree | 0522ea7572f66479f5e672ef30ea2f112438a09b | |
| parent | 47547d8508ab416e28992e0e0965c9c25f840848 [diff] |
[dev.typeparams] cmd/compile/internal/types2: clean up index expr implementation for type parameters This makes the implementation match the intended spec behavior: Given an index expression a[x] where a is a type parameter, the index expression is valid if the constraint for a satisfies the following criteria: - Either all types in the constraint type set are maps, or none of them are. - If the (type set) types are maps, they must all have the same key type. (This may be too strict, perhaps it's sufficient to ensure assignability, but we can always relax that later.) - All (type set) types must have the same element types. - If there are any arrays, a constant index must be in range for the shortest array. Change-Id: I8c094c11e6fc9496c293871ccf93e3814c881e6f Reviewed-on: https://go-review.googlesource.com/c/go/+/332553 Trust: Robert Griesemer <gri@golang.org> Reviewed-by: Robert Findley <rfindley@google.com>
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
Gopher image by Renee French, licensed under Creative Commons 3.0 Attributions license.
Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.
Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.
Official binary distributions are available at https://golang.org/dl/.
After downloading a binary release, visit https://golang.org/doc/install for installation instructions.
If a binary distribution is not available for your combination of operating system and architecture, visit https://golang.org/doc/install/source for source installation instructions.
Go is the work of thousands of contributors. We appreciate your help!
To contribute, please read the contribution guidelines at https://golang.org/doc/contribute.html.
Note that the Go project uses the issue tracker for bug reports and proposals only. See https://golang.org/wiki/Questions for a list of places to ask questions about the Go language.