Help with calling a function

(Jared Carey) #1

I’m struggling with calling a function where the arguments are a return from another function.

Working function

cmd := func(apiResp interface{}, err error) { ... }

I can call that function with


where cli.ServerVersion() == func (cli *Client) ServerVersion(ctx context.Context) (types.Version, error). 2 return types going to the cmd function.

Adding a third argument to cmd is where things break.

cmd := func(apiResp interface{}, err error, path string) { ... }

calling that with

cmd(cli.ServerVersion(context.Background()), "the/file/path")

causes the following errors:

  • multiple-value cli.ServerVersion() in single-value context```
  • not enough arguments in call to cmd

go version go1.11.4 darwin/amd64

(Johan Dahl) #2


It is a feature of go to be able to call a function with n number of arguments by first invoking a fucntion which returns the same number of arguments (and compatible types). Se this posting: Print string and return values of a function with Println

(Ivan Matmati) #3


It’s a case of multiple assigments :
The most generalized example in the part “You can declare multiple variables at once.” :

(system) closed #4

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