88 lines
1.7 KiB
Go
88 lines
1.7 KiB
Go
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package pogs_test
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import (
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"fmt"
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"zombiezen.com/go/capnproto2"
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"zombiezen.com/go/capnproto2/internal/demo/books"
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"zombiezen.com/go/capnproto2/pogs"
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)
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var bookData = []byte{
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0x00, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00,
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0xa0, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x01, 0x00, 0x00, 0x00, 0x72, 0x00, 0x00, 0x00,
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0x57, 0x61, 0x72, 0x20, 0x61, 0x6e, 0x64, 0x20,
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0x50, 0x65, 0x61, 0x63, 0x65, 0x00, 0x00, 0x00,
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}
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func ExampleExtract() {
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// books.capnp:
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// struct Book {
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// title @0 :Text;
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// pageCount @1 :Int32;
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// }
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type Book struct {
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Title string
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PageCount int32
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}
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// Read the message from bytes.
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msg, err := capnp.Unmarshal(bookData)
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if err != nil {
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panic(err)
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}
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root, err := msg.RootPtr()
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if err != nil {
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panic(err)
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}
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// Extract the book from the root struct.
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b := new(Book)
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if err := pogs.Extract(b, books.Book_TypeID, root.Struct()); err != nil {
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panic(err)
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}
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fmt.Printf("%q has %d pages\n", b.Title, b.PageCount)
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// Output:
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// "War and Peace" has 1440 pages
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}
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func ExampleInsert() {
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// books.capnp:
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// struct Book {
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// title @0 :Text;
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// pageCount @1 :Int32;
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// }
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type Book struct {
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Title string
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PageCount int32
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}
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// Allocate a new Cap'n Proto Book struct.
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_, seg, err := capnp.NewMessage(capnp.SingleSegment(nil))
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if err != nil {
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panic(err)
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}
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root, err := books.NewRootBook(seg)
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if err != nil {
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panic(err)
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}
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// Insert the book struct into the Cap'n Proto struct.
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b := &Book{
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Title: "War and Peace",
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PageCount: 1440,
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}
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if err := pogs.Insert(books.Book_TypeID, root.Struct, b); err != nil {
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panic(err)
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}
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fmt.Println(root)
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// Output:
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// (title = "War and Peace", pageCount = 1440)
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}
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