all: support Go 1.22

This adds initial support for Go 1.22. Not all new features are
supported yet.

.circleci/config.yml

@@ -105,6 +105,13 @@ jobs:
       - test-linux:
           llvm: "15"
     resource_class: large
+  test-llvm16-go122:
+    docker:
+      - image: golang:1.22-rc-bullseye
+    steps:
+      - test-linux:
+          llvm: "16"
+    resource_class: large
   test-llvm17-go121:
     docker:
       - image: golang:1.21-bullseye
@@ -119,5 +126,7 @@ workflows:
       # This tests our lowest supported versions of Go and LLVM, to make sure at
       # least the smoke tests still pass.
       - test-llvm15-go118
+      # This tests the upcoming Go 1.22 support.
+      - test-llvm16-go122
       # This tests the upcoming LLVM 17 support.
       - test-llvm17-go121

builder/config.go

@@ -27,10 +27,10 @@ func NewConfig(options *compileopts.Options) (*compileopts.Config, error) {
 	if err != nil {
 		return nil, err
 	}
-	if major != 1 || minor < 18 || minor > 21 {
+	if major != 1 || minor < 18 || minor > 22 {
 		// Note: when this gets updated, also update the Go compatibility matrix:
 		// https://github.com/tinygo-org/tinygo-site/blob/dev/content/docs/reference/go-compat-matrix.md
-		return nil, fmt.Errorf("requires go version 1.18 through 1.21, got go%d.%d", major, minor)
+		return nil, fmt.Errorf("requires go version 1.18 through 1.22, got go%d.%d", major, minor)
 	}
 
 	return &compileopts.Config{