76 lines
1.6 KiB
C++
76 lines
1.6 KiB
C++
#ifndef _KNOTKIT_ALGEBRA_GRADINGS_H
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#define _KNOTKIT_ALGEBRA_GRADINGS_H
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class grading
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{
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public:
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int h, q;
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public:
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grading () : h(0), q(0) { }
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grading (int h_, int q_) : h(h_), q(q_) { }
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grading (const grading &gr) : h(gr.h), q(gr.q) { }
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grading (grading&& gr) : h(std::move(gr.h)), q(std::move(gr.q)) {
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gr.h = gr.q = 0;
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}
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grading (reader &r)
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{
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h = r.read_int ();
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q = r.read_int ();
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}
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~grading () { }
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grading &operator = (const grading &gr) { h = gr.h; q = gr.q; return *this; }
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grading& operator = (grading&& gr) {
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h = std::move(gr.h);
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q = std::move(gr.q);
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gr.h = gr.q = 0;
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return *this;
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}
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grading operator + (const grading &gr) const
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{
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return grading (h + gr.h, q + gr.q);
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}
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grading operator - (const grading &gr) const
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{
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return grading (h - gr.h, q - gr.q);
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}
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grading &operator += (const grading &gr)
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{
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h += gr.h;
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q += gr.q;
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return *this;
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}
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grading &operator -= (const grading &gr)
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{
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h -= gr.h;
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q -= gr.q;
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return *this;
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}
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bool operator == (const grading &gr) const { return h == gr.h && q == gr.q; }
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bool operator != (const grading &gr) const { return !operator == (gr); }
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bool operator < (const grading &gr) const
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{
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return h < gr.h
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|| (h == gr.h && q < gr.q);
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}
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grading mirror_grading (unsigned nplus, unsigned nminus, bool torsion) const;
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void write_self (writer &w) const
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{
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w.write_int (h);
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w.write_int (q);
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}
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void show_self () const;
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void display_self () const;
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};
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#endif // _KNOTKIT_ALGEBRA_GRADINGS_H
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