Rheolef
7.2
an efficient C++ finite element environment
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n-ary function application in expressions
template <class Function, class... Expressions> Expression compose (const Function& f, const Expressions&... exprs);
Compose a n-ary function f with n fields in interpolate
and integrate
nonlinear expressions.
The compose
operator is used for applying a user-provided function to a field:
Float f (Float u) { return 1/u + sqrt(u); } ... field vh = interpolate (Xh, compose(f, uh));
When two arguments are involved:
Float g (Float u, Float v) { return v/u + sqrt(u*v); } ... field wh = interpolate (Xh, compose(g, uh, vh));
The compose
operator supports general n-ary functions and class-functions.
The compose
function supports also the method of characteristic
used e.g. for convection-diffusion problems:
characteristic X (-delta_t*uh); test v (Xh); field lh = integrate (compose(uh,X)*v);
This documentation has been generated from file main/lib/compose.h