Expression depending on the dimension of the case

[thomas-saigre]

In the doc we can find symbols associated to specific toolboxes (e.g. heat_T), but is there a list of all the default symbols available in Feel ? For instance x, y, t...

In particular, can we access the dimension of the case in expression ? For instance, I'm trying to make one looking like :

"{0,0}*(dim==2) + {0,0,0}*(dim==3):dim"

which is equals to {0,0} when we run a 2D case, and {0,0,0} for 3D.

[prudhomm]

you have this page https://docs.feelpp.org/user/latest/using/expr.html
the reserved symbols are : x,y,z,t,nx,ny,nz and a few other ones. I should probably update the documentation.

nx,ny,nz are defined only when the expression is evaluated on facets

[thomas-saigre]

is the dimension accessible ?