[bug-libmatheval] Adding functions in matheval

[Emilie Marchandise]

Dear developers,

I  currently use matheval as a great library in for my CFD developments.

I recently hardly tried to add in the symbol table a in new function

(smoothed heaviside function over a width epsilon) in the library wich is a

function of two parameters "heav_smooth(x,epsilon)", function which I have

implemented in xmath.cpp(h)

However, I was not able to make it run: several problems occured

- the parser did not recognize the "comma" in the definition of the function

- the evaluator_create(char *string) in matheval could not do the job.

Have you already tried to add such a function of several parameters in your

library or could you give me a clue such I could solve the problem ?

The problem might come from the parser and scanner.l  for with I am really

not familiar ..

Best regards,

Emilie

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Emilie Marchandise

Postdoctoral Fellow

iMMC

Université catholique de Louvain

Avenue G. Lemaître, 4

B-1348 Louvain-la-Neuve, Belgium

(Euler Building, office a.217)

Tel: 010/47 23 64

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Web: http://www.gce.ucl.ac.be/~marchand