On 29 March 2012 11:03, Francisco Garau <francisco.garau@gmail.com> wrote:

Hi - in porting the Type Inference Engine to Pharo, I came across this problem.

I was using the Interpreter class to help translate from the number of a primitive into a meaningful selector (eg from 1 to primitiveAdd).

Any ideas how to achieve something similar in Pharo?

Assuming primitive numbers haven't changed, I could just copy that method...

It is changed, of course, you'd better use Cog's primitive table(s). And i am +100000 for the idea. If you read vm-dev list , i recently pointed out on same thing. It would be nice to replace numbers with selectors. And change the compiler to translate them.

- Francisco

In Squeak 2.8:

Interpreter class >> initializePrimitiveTable

                "This table generates a C switch statement for primitive dispatching."

                "NOTE: The real limit here is 2047, but our C compiler currently barfs over 700"

                MaxPrimitiveIndex _ 700.

                PrimitiveTable _ Array new: MaxPrimitiveIndex + 1.

                self table: PrimitiveTable from:

                #(            "Integer Primitives (0-19)"

                                (0 primitiveFail)

                                (1 primitiveAdd)

                                (2 primitiveSubtract)

                                (3 primitiveLessThan)

                                (4 primitiveGreaterThan)

                                (5 primitiveLessOrEqual)

                                (6 primitiveGreaterOrEqual)

                                (7 primitiveEqual)

                                (8 primitiveNotEqual)

                                (9 primitiveMultiply)

                                (10 primitiveDivide)

                                (11 primitiveMod)

:

<and so on>

-- Best regards, Igor Stasenko.