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What do you think about link cast operator to a "toX" function? [message #1782935]

Mon, 05 March 2018 12:52

Stéphane Galland

Messages: 123
Registered: July 2014
Location: Belfort, France

Senior Member

Dear all.

In Xbase DSL, we have the cast operator, e.g.

value as type

.
In Java, we have functions for converting an object to another type, e.g.

toString()

.

Now, I think about a mechanism that may automatically link the cast operator within a DSL to any "toX" function.

Let the DSL code

value as Type

The DSL compiler should try:

If the type of the value is a primitive type, use the standard cast operator;
If a single function "def toXYZ : Type" is defined within the type of value, call it;
If a single function "def toXYZ : T" where "T is a super type of Type" is defined, call it;O
Otherwise, use the standard cast operator.

Do you think this feature is practibable?

All the best.
Stéphane.

[Updated on: Mon, 05 March 2018 14:54]

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Re: What do you think about link cast operator to a "toX" function? [message #1782939 is a reply to message #1782935]

Mon, 05 March 2018 13:41

Karsten Thoms

Messages: 762
Registered: July 2009
Location: Dortmund, Germany

Senior Member

Hi Stéphane,

on first sight I like that idea. It is similar to the definition of operator methods. I think it makes sense to enter an issue for xtext-extras: https://github.com/eclipse/xtext-extras/issues and discuss it there.

~Karsten

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