Eigen::symbolic

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Classes

	Name
class	Eigen::symbolic::AddExpr
class	Eigen::symbolic::BaseExpr
struct	Eigen::symbolic::is_symbolic
class	Eigen::symbolic::NegateExpr
class	Eigen::symbolic::ProductExpr
class	Eigen::symbolic::QuotientExpr
class	Eigen::symbolic::Symbol
class	Eigen::symbolic::SymbolExpr
class	Eigen::symbolic::SymbolValue
class	Eigen::symbolic::ValueExpr
class	Eigen::symbolic::ValueExpr< internal::FixedInt< N > >

Detailed Description

This namespace defines a set of classes and functions to build and evaluate symbolic expressions of scalar type Index. Here is a simple example:

// First step, defines symbols:
struct x_tag {};  static const symbolic::SymbolExpr<x_tag> x;
struct y_tag {};  static const symbolic::SymbolExpr<y_tag> y;
struct z_tag {};  static const symbolic::SymbolExpr<z_tag> z;

// Defines an expression:
auto expr = (x+3)/y+z;

// And evaluate it: (c++14)
std::cout << expr.eval(x=6,y=3,z=-13) << "\n";

// In c++98/11, only one symbol per expression is supported for now:
auto expr98 = (3-x)/2;
std::cout << expr98.eval(x=6) << "\n";

It is currently only used internally to define and manipulate the Eigen::last and Eigen::lastp1 symbols in Eigen::seq and Eigen::seqN.

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Updated on 2023-11-29 at 18:22:21 +0000