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2a07cb0f2d
* data/skeletons/glr2.cc (glr_state_set::yyremoveDeletes): Use
vector::resize rather than vector::erase.
(glr_state::copyFrom): Merge into...
(glr_state::operator=): here.
Valentin wanted each assignment to be explicit, hence copyFrom rather
that operator=. But in 0a82316e54
(glr2.cc: example: use objects (not pointers) to represent the AST),
in order to get real objects to be processed correctly, we had to
introduce the assignment operator. Afterward, we also introduced a
full implementation of the copy-ctor, independent of copyFrom. As a
result, today the only invocation of copyFrom is from the assignment
operator. Simplify this.