396b6c2e7c
The assignment type-checking code previously bounced around a lot between the LHS and RHS sides of the assignment. But there's actually a very simple, consistent pattern to how to type check assignments: 1. Check the RHS expression. 2. If the LHS expression is an identifier that was declared in this statement and it doesn't have an explicit type, give it the RHS expression's default type. 3. Check the LHS expression. 4. Try assigning the RHS expression to the LHS expression, adding implicit conversions as needed. This CL implements this algorithm, and refactors tcAssign and tcAssignList to use a common implementation. It also fixes the error messages to consistently say just "1 variable" or "1 value", rather than occasionally "1 variables" or "1 values". Fixes #43348. Passes toolstash -cmp. Change-Id: I749cb8d6ccbc7d22cd7cb0a381f58a39fc2696b5 Reviewed-on: https://go-review.googlesource.com/c/go/+/280112 Trust: Matthew Dempsky <mdempsky@google.com> Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com> |
||
|---|---|---|
| .github | ||
| api | ||
| doc | ||
| lib/time | ||
| misc | ||
| src | ||
| test | ||
| .gitattributes | ||
| .gitignore | ||
| AUTHORS | ||
| codereview.cfg | ||
| CONTRIBUTING.md | ||
| CONTRIBUTORS | ||
| favicon.ico | ||
| LICENSE | ||
| PATENTS | ||
| README.md | ||
| robots.txt | ||
| SECURITY.md | ||
The Go Programming Language
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.
Download and Install
Binary Distributions
Official binary distributions are available at https://golang.org/dl/.
After downloading a binary release, visit https://golang.org/doc/install or load doc/install.html in your web browser for installation instructions.
Install From Source
If a binary distribution is not available for your combination of operating system and architecture, visit https://golang.org/doc/install/source or load doc/install-source.html in your web browser for source installation instructions.
Contributing
Go is the work of thousands of contributors. We appreciate your help!
To contribute, please read the contribution guidelines: 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.