5a42e15c4a
Squashed messages from 9 commits:
9.
Properties now uses PropertyFamily and contained classes.
Fetching,seting,clearing properties can be done with PropertyFamilyKey or PropertyTypeKey.
Hierarchy of newly added clases is:
Vertices -n-> PropertyFamily {name: String} <-1-n-> PropertyType {type: Property::Flags}
Edges -n-> PropertyFamily {name: String} <-1-n-> PropertyType {type: Property::Flags}
PropertyFamilyKey -> PropertyType
PropertyTypeKey -> PropertyType
PropertyType t0,t1;
let t0!=t1 be true
let t0.family==t1.family be true
then next is true
PropertyTypeKey{&t0}!=PropertyTypeKey{&t1}
PropertyFamilyKey{&t0}==PropertyFamilyKey{&t1}
PropertyFamilyKey{&t0}==PropertyTypeKey{&t1}
PropertyTypeKey{&t0}==PropertyFamilyKey{&t1}
8.
Intermedate commit.
Noticed that integration queries throw SEGFAULT.
7.
Defined interface for indexes.
Fixed three memory leaks.
Fixed integration_queries test which now passes.
6.
Commit which return Xorshift128plus to valid shape.
5.
Tmp commit.
4.
Label Index is compiling.
3.
tmp
2.
Vertex::Accessor now updates Label index.
1.
Applied changes for code review.
49 lines
1.2 KiB
C++
49 lines
1.2 KiB
C++
#pragma once
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#include "utils/iterator/iterator_base.hpp"
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#include "utils/option.hpp"
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namespace iter
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{
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// Class which maps values returned by I iterator into value of type T with OP
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// function.
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// T - type of return value
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// I - iterator type
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// OP - type of mapper function
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template <class T, class I, class OP>
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class Map : public IteratorBase<T>
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{
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public:
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Map() = delete;
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// Map operation is designed to be used in chained calls which operate on a
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// iterator. Map will in that usecase receive other iterator by value and
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// std::move is a optimization for it.
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Map(I &&iter, OP &&op) : iter(std::move(iter)), op(std::move(op)) {}
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Option<T> next() final
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{
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auto item = iter.next();
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if (item.is_present()) {
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return Option<T>(op(item.take()));
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} else {
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return Option<T>();
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}
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}
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private:
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I iter;
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OP op;
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};
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template <class I, class OP>
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auto make_map(I &&iter, OP &&op)
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{
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// Compiler cant deduce type T. decltype is here to help with it.
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return Map<decltype(op(iter.next().take())), I, OP>(std::move(iter),
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std::move(op));
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}
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}
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