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