Hi,
as far as I know there is no built-in support for evaluating quotations (or even compiling & executing them) directly, however for some cases you can use the LINQ "Compile" feature - LINQ is a new feature in .NET 3.5, which contains "expression trees" that represent similar thing as F# quotations and that provide a "Compile" method for turning them into executable code. F# distribution contains a sample (FLinq) that translates subset of F# quotations to the LINQ expression trees, which can be then compiled & executed.
There are some information about this approach in a paper available here:
[link:research.microsoft.com]
This is of course limited only to certain quotations, but it could help...
You can use the reflected definition attribute instread of <@ @>. In this case the compiler will generate both the real function and quotation:
1 2
[<ReflectedDefinition>] let poly x = x+2.0*x+3.0/(x*x)
There's a nice example of this in Expert F# p253.
Cheers,
Rob
Thanks Tomas and Robert -- useful info.
~TMSteve
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I see that Quotations provide a way to get an Abstract Syntax Tree from some F# source code.
Is there a way to "eval" such a Quotation?
(So that one could programmatically construct a Quotation, and then execute it.)
~TMSteve