Category:Fexl: Difference between revisions
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Ultimately the core functions of Fexl are written in the [[C]] programming language. To write a new core function named "X" within Fexl, you simply create an appropriate C routine named "fexl_X". It automatically becomes available as a built-in Fexl function. |
Ultimately the core functions of Fexl are written in the [[C]] programming language. To write a new core function named "X" within Fexl, you simply create an appropriate C routine named "fexl_X". It automatically becomes available as a built-in Fexl function. |
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For example, here is the C routine which implements the classic '''S''' combinator (fusion), where (S x y z) = (x z) (y z): |
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<lang C> |
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value fexl_S(value f) |
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{ |
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if (!f->L->L || !f->L->L->L) return f; |
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return A( A(f->L->L->R, f->R), A(f->L->R, f->R) ); |
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} |
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</lang> |
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