\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)
CGAL 4.12.2 - Number Types
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CGAL::Is_valid< T > Class Template Reference
Number Types Reference » Utilities

#include <CGAL/utils_classes.h>

Definition

Not all values of a type need to be valid.

The function object class Is_valid checks this.

For example, an expression like NT(0)/NT(0) can result in an invalid number. Routines may have as a precondition that all values are valid.

Is Model Of:
AdaptableFunctor

Operations

bool operator() (const T &x)
 returns if the argument is valid.