go.mod, compiler: bump minimum Go version to 1.23

This enables gotypesalias=1 by default, which is needed for
generic type aliases to work correctly in go/types.

.circleci/config.yml

@@ -96,7 +96,7 @@ jobs:
     # This tests our lowest supported versions of Go and LLVM, to make sure at
     # least the smoke tests still pass.
     docker:
-      - image: golang:1.22-bullseye
+      - image: golang:1.23-bullseye
     steps:
       - test-linux:
           llvm: "15"

compiler/symbol.go

@@ -540,7 +540,7 @@ func (c *compilerContext) isValidWasmType(typ types.Type, site wasmSite) bool {
 		}
 		for i := 0; i < typ.NumFields(); i++ {
 			ftyp := typ.Field(i).Type()
-			if ftyp.String() == "structs.HostLayout" {
+			if types.Unalias(ftyp).String() == "structs.HostLayout" {
 				hasHostLayout = true
 				continue
 			}

go.mod

@@ -1,6 +1,6 @@
 module github.com/tinygo-org/tinygo
 
-go 1.22.0
+go 1.23
 
 require (
 	github.com/aykevl/go-wasm v0.0.2-0.20250317121156-42b86c494139

main_test.go

@@ -107,6 +107,9 @@ func TestBuild(t *testing.T) {
 	if minor >= 23 {
 		tests = append(tests, "go1.23/")
 	}
+	if minor >= 24 {
+		tests = append(tests, "typealias.go")
+	}
 
 	if *testTarget != "" {
 		// This makes it possible to run one specific test (instead of all),

testdata/typealias.go

@@ -0,0 +1,10 @@
+package main
+
+// Generic type alias (requires go 1.24+, or GOEXPERIMENT=aliastypeparams in go 1.23).
+type Set[T comparable] = map[T]struct{}
+
+func main() {
+	s := make(Set[string])
+	s["hello"] = struct{}{}
+	println(len(s))
+}

testdata/typealias.txt

@@ -0,0 +1 @@
+1