TUN-8006: Update quic-go to latest upstream

vendor/go.uber.org/mock/mockgen/generic_go118.go

@@ -0,0 +1,116 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build go1.18
+// +build go1.18
+
+package main
+
+import (
+	"fmt"
+	"go/ast"
+	"strings"
+
+	"go.uber.org/mock/mockgen/model"
+)
+
+func getTypeSpecTypeParams(ts *ast.TypeSpec) []*ast.Field {
+	if ts == nil || ts.TypeParams == nil {
+		return nil
+	}
+	return ts.TypeParams.List
+}
+
+func (p *fileParser) parseGenericType(pkg string, typ ast.Expr, tps map[string]model.Type) (model.Type, error) {
+	switch v := typ.(type) {
+	case *ast.IndexExpr:
+		m, err := p.parseType(pkg, v.X, tps)
+		if err != nil {
+			return nil, err
+		}
+		nm, ok := m.(*model.NamedType)
+		if !ok {
+			return m, nil
+		}
+		t, err := p.parseType(pkg, v.Index, tps)
+		if err != nil {
+			return nil, err
+		}
+		nm.TypeParams = &model.TypeParametersType{TypeParameters: []model.Type{t}}
+		return m, nil
+	case *ast.IndexListExpr:
+		m, err := p.parseType(pkg, v.X, tps)
+		if err != nil {
+			return nil, err
+		}
+		nm, ok := m.(*model.NamedType)
+		if !ok {
+			return m, nil
+		}
+		var ts []model.Type
+		for _, expr := range v.Indices {
+			t, err := p.parseType(pkg, expr, tps)
+			if err != nil {
+				return nil, err
+			}
+			ts = append(ts, t)
+		}
+		nm.TypeParams = &model.TypeParametersType{TypeParameters: ts}
+		return m, nil
+	}
+	return nil, nil
+}
+
+func getIdentTypeParams(decl any) string {
+	if decl == nil {
+		return ""
+	}
+	ts, ok := decl.(*ast.TypeSpec)
+	if !ok {
+		return ""
+	}
+	if ts.TypeParams == nil || len(ts.TypeParams.List) == 0 {
+		return ""
+	}
+	var sb strings.Builder
+	sb.WriteString("[")
+	for i, v := range ts.TypeParams.List {
+		if i != 0 {
+			sb.WriteString(", ")
+		}
+		sb.WriteString(v.Names[0].Name)
+	}
+	sb.WriteString("]")
+	return sb.String()
+}
+
+func (p *fileParser) parseGenericMethod(field *ast.Field, it *namedInterface, iface *model.Interface, pkg string, tps map[string]model.Type) ([]*model.Method, error) {
+	var indices []ast.Expr
+	var typ ast.Expr
+	switch v := field.Type.(type) {
+	case *ast.IndexExpr:
+		indices = []ast.Expr{v.Index}
+		typ = v.X
+	case *ast.IndexListExpr:
+		indices = v.Indices
+		typ = v.X
+	default:
+		return nil, fmt.Errorf("don't know how to mock method of type %T", field.Type)
+	}
+
+	nf := &ast.Field{
+		Doc:     field.Comment,
+		Names:   field.Names,
+		Type:    typ,
+		Tag:     field.Tag,
+		Comment: field.Comment,
+	}
+
+	it.embeddedInstTypeParams = indices
+
+	return p.parseMethod(nf, it, iface, pkg, tps)
+}