[meta] Introduce the InstructionGroupBuilder;

This follows the rest of the code base data structures, where we have a
mutable data structure builder; once the data structure is constructed,
it's immutable.

This also makes the definition of instructions easier, and it paves the
way for defining immediate variants.
This commit is contained in:
Benjamin Bouvier
2019-04-30 18:33:01 +02:00
parent feb90e376a
commit d9277f249b
7 changed files with 251 additions and 382 deletions

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