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[poincare/unit] Add comment about namespace and scope usage

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Ruben Dashyan
2020-02-19 11:39:02 +01:00
committed by Émilie Feral
parent 2fa71e4350
commit 202beb3b13
1 changed files with 10 additions and 0 deletions
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10
poincare/include/poincare/unit.h
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@@ -17,6 +17,16 @@ public:
* - a list of allowed output prefixes
* Given a Dimension, a representative in that Dimension and a Prefix
* allowed for that representative, one may get a symbol and an Expression.
*
* FIXME ?
* The UnitNode class holds as members pointers to a Dimension, a
* Representative, a Prefix. Those nested classes may not be forward
* declared and must be defined in UnitNode and then aliased in Unit so as
* to be used outside. That technical limitation could have been avoided if
* UnitNode were itself a nested class of Unit, say Unit::Node. More
* generally, turning all the Poincare::...Node classes into nested
* Poincare::...::Node classes might be a more clever usage of namespaces
* and scopes.
*/
// There are 7 base units from which all other units are derived.