1 files changed, 91 insertions, 0 deletions
diff --git a/vendor/golang.org/x/tools/internal/gcimporter/predeclared.go b/vendor/golang.org/x/tools/internal/gcimporter/predeclared.go
new file mode 100644
index 000000000..907c8557a
--- /dev/null
+++ b/vendor/golang.org/x/tools/internal/gcimporter/predeclared.go
@@ -0,0 +1,91 @@
+// 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 gcimporter
+
+import (
+	"go/types"
+	"sync"
+)
+
+// predecl is a cache for the predeclared types in types.Universe.
+//
+// Cache a distinct result based on the runtime value of any.
+// The pointer value of the any type varies based on GODEBUG settings.
+var predeclMu sync.Mutex
+var predecl map[types.Type][]types.Type
+
+func predeclared() []types.Type {
+	anyt := types.Universe.Lookup("any").Type()
+
+	predeclMu.Lock()
+	defer predeclMu.Unlock()
+
+	if pre, ok := predecl[anyt]; ok {
+		return pre
+	}
+
+	if predecl == nil {
+		predecl = make(map[types.Type][]types.Type)
+	}
+
+	decls := []types.Type{ // basic types
+		types.Typ[types.Bool],
+		types.Typ[types.Int],
+		types.Typ[types.Int8],
+		types.Typ[types.Int16],
+		types.Typ[types.Int32],
+		types.Typ[types.Int64],
+		types.Typ[types.Uint],
+		types.Typ[types.Uint8],
+		types.Typ[types.Uint16],
+		types.Typ[types.Uint32],
+		types.Typ[types.Uint64],
+		types.Typ[types.Uintptr],
+		types.Typ[types.Float32],
+		types.Typ[types.Float64],
+		types.Typ[types.Complex64],
+		types.Typ[types.Complex128],
+		types.Typ[types.String],
+
+		// basic type aliases
+		types.Universe.Lookup("byte").Type(),
+		types.Universe.Lookup("rune").Type(),
+
+		// error
+		types.Universe.Lookup("error").Type(),
+
+		// untyped types
+		types.Typ[types.UntypedBool],
+		types.Typ[types.UntypedInt],
+		types.Typ[types.UntypedRune],
+		types.Typ[types.UntypedFloat],
+		types.Typ[types.UntypedComplex],
+		types.Typ[types.UntypedString],
+		types.Typ[types.UntypedNil],
+
+		// package unsafe
+		types.Typ[types.UnsafePointer],
+
+		// invalid type
+		types.Typ[types.Invalid], // only appears in packages with errors
+
+		// used internally by gc; never used by this package or in .a files
+		anyType{},
+
+		// comparable
+		types.Universe.Lookup("comparable").Type(),
+
+		// any
+		anyt,
+	}
+
+	predecl[anyt] = decls
+	return decls
+}
+
+type anyType struct{}
+
+func (t anyType) Underlying() types.Type { return t }
+func (t anyType) String() string         { return "any" }