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<!DOCTYPE html><html lang='en'><head><title>[qty.unit.mag.concepts]</title><meta charset='UTF-8'/><link rel='stylesheet' type='text/css' href='14882.css'/><link rel='stylesheet' type='text/css' href='https://fonts.googleapis.com/css2?family=Noto+Serif'/><link rel='stylesheet' type='text/css' href='https://fonts.googleapis.com/css2?family=Noto+Sans'/><link rel='stylesheet' type='text/css' href='https://fonts.googleapis.com/css2?family=Noto+Sans+Mono'/><link rel='icon' href='icon.png'/><link rel='stylesheet' type='text/css' href='expanded.css' title='Normal'/><link rel='alternate stylesheet' type='text/css' href='colored.css' title='Notes and examples colored'/><link rel='alternate stylesheet' type='text/css' href='normative-only.css' title='Notes and examples hidden'/></head><body><div class='wrapper'><h1 ><a class='secnum' style='min-width:50pt'>5</a> Quantities and units library <a class='abbr_ref' href='index.html#quantities'>[quantities]</a></h1><h2 ><a class='secnum' style='min-width:65pt'>5.4</a> Reference <a class='abbr_ref' href='qty.ref.html#qty.unit.mag.concepts'>[qty.ref]</a></h2><h3 ><a class='secnum' style='min-width:80pt'>5.4.4</a> Unit <a class='abbr_ref' href='qty.unit.html#mag.concepts'>[qty.unit]</a></h3><h4 ><a class='secnum' style='min-width:95pt'>5.4.4.2</a> Magnitude <a class='abbr_ref' href='qty.unit.mag.html#concepts'>[qty.unit.mag]</a></h4><h4 ><a class='secnum' style='min-width:110pt'>5.4.4.2.2</a> Concepts <a class='abbr_ref'>[qty.unit.mag.concepts]</a></h4><div class='texpara'><div class='itemdecl' id='itemdecl:1'><div class='marginalizedparent'><a class='itemDeclLink' href='#itemdecl:1'>🔗</a></div><code class='itemdeclcode'><span class='keyword'>template</span><span class='anglebracket'><</span><span class='keyword'>typename</span> T<span class='anglebracket'>></span>
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<span class='keyword'>concept</span> <a class='hidden_link' href='#concept:MagConstant' title='5.4.4.2.2 Concepts [qty.unit.mag.concepts]'><span id='concept:MagConstant'><span id='lib:MagConstant'><span class='texttt'>MagConstant</span></span></span></a> <span class='operator'>=</span> <a class='index' id='conceptref:SymbolicConstant'></a><span class='texttt'><i >SymbolicConstant</i></span><span class='anglebracket'><</span>T<span class='anglebracket'>></span> <span class='operator'>&</span><span class='operator'>&</span> <span class='texttt'><i >is-derived-from-specialization-of</i></span><span class='anglebracket'><</span>T, mag_constant<span class='anglebracket'>></span><span class='parenthesis'>(</span><span class='parenthesis'>)</span>;
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<span class='keyword'>template</span><span class='anglebracket'><</span><span class='keyword'>typename</span> T<span class='anglebracket'>></span>
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<span class='keyword'>concept</span> <a class='hidden_link' href='#concept:UnitMagnitude' title='5.4.4.2.2 Concepts [qty.unit.mag.concepts]'><span id='concept:UnitMagnitude'><span id='lib:UnitMagnitude'><span class='texttt'>UnitMagnitude</span></span></span></a> <span class='operator'>=</span> <span class='parenthesis'>(</span><span class='texttt'><i >is-specialization-of</i></span><span class='anglebracket'><</span>T, <span class='texttt'><i >unit-magnitude</i></span><span class='anglebracket'>></span><span class='parenthesis'>(</span><span class='parenthesis'>)</span><span class='parenthesis'>)</span>;
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<span class='keyword'>template</span><span class='anglebracket'><</span><span class='keyword'>typename</span> T<span class='anglebracket'>></span>
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<span class='keyword'>concept</span> <span class='texttt'><i >MagArg</i></span><a class='index' id='concept:MagArg'></a> <span class='operator'>=</span> std<span class='operator'>::</span>integral<span class='anglebracket'><</span>T<span class='anglebracket'>></span> <span class='operator'>|</span><span class='operator'>|</span> <a href='#concept:MagConstant' title='5.4.4.2.2 Concepts [qty.unit.mag.concepts]'><span id='conceptref:MagConstant'><span class='texttt'>MagConstant</span></span></a><span class='anglebracket'><</span>T<span class='anglebracket'>></span>; <span class='comment'>// <i >exposition only</i></span>
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