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Having some maps defined as:
var valueToSomeType = map[uint8]someType{...} var nameToSomeType = map[string]someType{...} I would want a variable that points to the address of the maps (to don't copy all variable). I tried it using:
valueTo := &valueToSomeType nameTo := &nameToSomeType but at using valueTo[number], it shows
internal compiler error: var without type, init: new
How to get it?
Edit
The error was showed by another problem.
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So, to add an element in map we can use one of its member function insert() i.e. pair<iterator,bool> insert (const value_type& element); pair<iterator,bool> insert (const value_type& element); pair<iterator,bool> insert (const value_type& element);
C++ standard provided specialisation of std::less for pointers, so yes you can safely use them as map keys etc.
Maps, like channels, but unlike slices, are just pointers to runtime types. As you saw above, a map is just a pointer to a runtime. hmap structure. Maps have the same pointer semantics as any other pointer value in a Go program.
Maps are reference types, so they are always passed by reference. You don't need a pointer. Go Doc
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More specifically, from the Golang Specs:
Slices, maps and channels are reference types that do not require the extra indirection of an allocation with
new.
The built-in function make takes a typeT, which must be a slice, map or channel type, optionally followed by a type-specific list of expressions.
It returns a value of typeT(not*T).
The memory is initialized as described in the section on initial values
However, regarding function calls, the parameters are passed by value (always).
Except the value of a map parameter is a pointer.
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