That makes so much more sense now. Thank you for the explanation!
On Thu, Jun 6, 2019 at 7:07 PM Steven Blenkinsop <steven...@gmail.com>
wrote:
> = is always required when you're assigning a value to the var. the
> confusion might be that you can also have a declaration like
>
> var bar []struct{a, b, c string}
>
> where you don't assign a value to bar (meaning it will be null).
>
> Really, the syntax is
>
> var variableName Type = value
>
> You can leave off either the "Type" or the "= value" but not both.
>
> var bar = []struct{a, b, c string} {
> { "really", "long", "row"},
> { "many", "many", "rows"},
> ...
> }
>
> is just a special case where you've left off the "Type", and "value"
> happens to be a composite literal expression. It could also be written as
>
> var bar []struct{a, b, c string} = []struct{a, b, c string} {
> { "really", "long", "row"},
> { "many", "many", "rows"},
> ...
> }
>
> On Thu, Jun 6, 2019 at 2:47 PM 'Aaron Spangler' via golang-nuts <
> golang-nuts@googlegroups.com> wrote:
>
>> Thank you! You are correct. That was exactly my problem. Adding the
>> equals sign (=) solved it.
>>
>> I guess I need to be more aware that sometimes an equals statement is
>> required on a 'var' line and other times it is not. (perhaps only when it
>> has a literal)
>>
>> Thanks again!
>>
>> On Thu, Jun 6, 2019 at 11:05 AM Ian Lance Taylor <i...@golang.org> wrote:
>>
>>> On Thu, Jun 6, 2019 at 10:56 AM ajs via golang-nuts
>>> <golang-nuts@googlegroups.com> wrote:
>>> >
>>> > I can declare literal bar inside a function like this:
>>> >
>>> > func foo() {
>>> > bar := []struct{a, b, c string} {
>>> > { "really", "long", "row"},
>>> > { "many", "many", "rows"},
>>> > ...
>>> > }
>>> > }
>>> >
>>> > But I really want it anchored (for code generation reason) outside of
>>> a function like this:
>>> >
>>> > func foo() {
>>> > ...
>>> > }
>>> >
>>> > var bar []struct{a, b, c string} {
>>> > { "really", "long", "row"},
>>> > { "many", "many", "rows"},
>>> > ...
>>> > }
>>> >
>>> > The problem is it gets upset on the last character of the 'var bar
>>> ...' line. Is there a better way to write this?
>>> > Note for reasons outside of this discussion, I really want to avoid
>>> writing it by repeating the discrete field names:
>>> >
>>> > var bar []struct{a, b, c string} {
>>> > {a: "really",b: "long",c: "row"}, // Don't want to do this
>>> > {a: "many", b: "many", c: "rows"}, // Don't want to do this
>>> > ...
>>> > }
>>> >
>>> > Any thoughts? What am I missing?
>>>
>>> An important tip: when asking a question, please tell us precisely
>>> what you did and precisely what happened. You can see what happened,
>>> but when you write "it gets upset" we have to guess. And it's easy
>>> for us to guess wrong.
>>>
>>> When I look at
>>>
>>> var bar []struct{a, b, c string} {
>>> { "really", "long", "row"},
>>> { "many", "many", "rows"},
>>> ...
>>> }
>>>
>>> what I think is that it should say
>>>
>>> var bar = []struct{...
>>>
>>> That is, you are missing the "=". But I don't know if that was a typo
>>> in the e-mail message. So if that doesn't help tell us exactly what
>>> you did and exactly what happened.
>>>
>>> Ian
>>>
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