I'm reading the source code of Iris and trying to reimplement it.
There is a line I can't understand.
if p, is := e.Engine.(EngineRawExecutor); is {
return p.ExecuteRaw(src, wr, binding)
}
The define of EngineRawExecutor is
EngineRawExecutor interface {
// ExecuteRaw is super-simple function without options and funcs, it's not
used widely
ExecuteRaw(src string, wr io.Writer, binding interface{}) error
}
I'm pretty curious about how e.Engine.(EngineRawExecutor) works, what is the
parentheses means there.
why this line return two return value p, and is
I'm confused, any help will be great to me.
Thanks
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