Composite-literals are a way of declaring and allocating resources in the Go programming language.
Questions tagged [composite-literals]
30 questions
1
vote
1 answer
golang: How to define a sequence of steps
I want to write a protocol test. My current idea is to define a series of steps. Each Step contains a Trigger and Expectation - e.g. trigger MsgA and expect MsgB.
type Series struct {
Steps []Step
}
What I don't like about this, is that the…
transient_loop
- 5,984
- 15
- 58
- 117
1
vote
1 answer
Go generics: invalid composite literal type T
package main
import (
"google.golang.org/protobuf/proto"
)
type NetMessage struct {
Data []byte
}
type Route struct {
}
type AbstractParse interface {
Parse(*NetMessage) proto.Message
}
type MessageParse[T proto.Message] struct…
lori227
- 23
- 1
- 3
1
vote
1 answer
Go: Confusion about initialization of struct array
My Confusion is shown in the following code snippet:
type Ex struct{
A,B int
}
a := []Ex{Ex{1, 2}, Ex{3, 4}} //it works, and I understand it
b := []*Ex{&Ex{1, 2}, &Ex{3, 4}} //it works, and I understand it
c := []Ex{{1, 2}, {3, 4}} //it…
xxllxx666
- 183
- 1
- 6
1
vote
1 answer
How to remove the primitive.E composite literal uses unkeyed fields error?
In this code, I am trying to add a new field in the MongoDB database. But it is giving me a problem in the update variable and that is go.mongodb.org/mongo-driver/bson/primitive.E composite literal uses unkeyed fields. I don't know what to do.
The…
Qora bhai
- 47
- 6
1
vote
1 answer
Can I add items to a slice in the creation statement depending on a condition?
I have function that creates a slice like this :
func buildOptions(cfg *ServerConfig) []SomeType {
return []SomeType{
Option1,
Option2,
Option3,
}
}
I need Option3 to be added to the slice only if a certain…
FunkSoulBrother
- 2,057
- 18
- 27
1
vote
1 answer
How to fix "missing type in composite literal" in test cases
I am trying to write test code for the function ReadField() but I am having difficulty defining the test cases.
It gives an error "missing type in composite literal". I believe its just some syntax error.
I have tried defining the struct outside…
Jairus Roguel
- 65
- 1
- 8
1
vote
1 answer
Embed an type of other pkg into mine, and init it by literal
I read how to init embed type, and a related Q&A.
What my problem is when compile this code, I got :
[Error] unknown field 'feature.DefaultSshHelper' in struct literal of type dala02
type FDH feature.DefaultSshHelper …
Frank Wang
- 788
- 7
- 23
1
vote
3 answers
Can I bind one element of class to another while initializing in one line?
I have a class (struct) like this:
type Question struct{
Question string
answerOne string
answerTwo string
answerCorrect string
}
And I initialize it like this:
q1:=Question{
Question:"What?",
answerOne:"A",
…
user8664286
0
votes
2 answers
Golang for loop with multiple brackets
I've stumbled upon this repository,
https://github.com/prometheus-community/jiralert/blob/a0f0e80e575e71cbf7db565d3296a3a984282dff/pkg/config/config_test.go#L148
The for loop has multiple brackets:
for _, test := range []struct {
…
Ratiel
- 85
- 7
0
votes
3 answers
Is it possible to have interface composite literals in Go?
I just want to confirm if my understanding is correct about interface{}{}
Does interface{}{} mean a composite literal of interface type?
So, if I wanted to pass a composite type, lets say []byte as a interface{}, I should assign it to a variable of…
NimaKapoor
- 119
- 6
0
votes
1 answer
Go composite literal for type of primitive value
I am a new to Go and have a question. Maybe it is not a idiomatic Go code but just for studying purposes how to make this code work? It seems that I can put as a receiver type of int, but how to call it in main?:
xa.go
package main
import…
Володимир Христенко
- 73
- 1
- 6
0
votes
1 answer
Modifying struct
I have a struct such as
type Info struct {
Foo string
FooBar string
Services string
Clown string
}
and lets say I have already populated the first 2 fields
input := &Info{
Foo: "true",
Services:…
Marc-Antoine Caron
- 85
- 9
0
votes
3 answers
Golang, what does the following do []
I'm new to golang and have a basic question. I have the following code taken from an example from the web
func (d Direction) String() string {
return [...]string{"North", "East", "South", "West"}[d]
}
I'm confused what does the [d] do in the…
pandith padaya
- 1,643
- 1
- 10
- 20
0
votes
1 answer
Composite literal and fields from an embedded type
I was working on a sample program to answer another question here on SO and found myself somewhat baffled by the fact that the following code will not compile;
https://play.golang.org/p/wxBGcgfs1o
package main
import "fmt"
type A struct {
…
evanmcdonnal
- 46,131
- 16
- 104
- 115
0
votes
3 answers
Assigning value in Golang
I create a var of type
var RespData []ResponseData
ResponseData is a structure as below:
type ResponseData struct {
DataType string
Component string
ParameterName string
ParameterValue string
…
susheel chaudhary
- 273
- 3
- 5
- 8