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// Copyright 2024 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package norangeoverfunc
// TODO(adonovan): delete this when #67237 and dominikh/go-tools#1494 are fixed.
import (
_ "embed"
"fmt"
"go/ast"
"go/types"
"golang.org/x/tools/go/analysis"
"golang.org/x/tools/go/analysis/passes/inspect"
"golang.org/x/tools/go/ast/inspector"
)
var Analyzer = &analysis.Analyzer{
Name: "norangeoverfunc",
Doc: `norangeoverfunc fails if a package uses go1.23 range-over-func
Require it from any analyzer that cannot yet safely process this new feature.`,
Requires: []*analysis.Analyzer{inspect.Analyzer},
Run: run,
}
func run(pass *analysis.Pass) (any, error) {
inspect := pass.ResultOf[inspect.Analyzer].(*inspector.Inspector)
filter := []ast.Node{(*ast.RangeStmt)(nil)}
// TODO(adonovan): opt: short circuit if not using go1.23.
var found *ast.RangeStmt
inspect.Preorder(filter, func(n ast.Node) {
if found == nil {
stmt := n.(*ast.RangeStmt)
if _, ok := pass.TypesInfo.TypeOf(stmt.X).Underlying().(*types.Signature); ok {
found = stmt
}
}
})
if found != nil {
return nil, fmt.Errorf("package %q uses go1.23 range-over-func; cannot build SSA or IR (#67237)",
pass.Pkg.Path())
}
return nil, nil
}
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