Hi Paul,
On 23 Okt., 15:11, Paul Drummond
<[EMAIL PROTECTED]> wrote:
> I am a bit puzzled by how metadata seems to behave differently
> depeding on where it's used and whether #^ is included or not:
AFAIU, #^ attaches the given map to the thing read.
> (defn #^{:doc "doc"} my-fn ([x] x))
> ;;Works
Attaches {:doc "doc"} to the metadata of the symbol my-fn.
> (defn {:doc "doc"} my-fn ([x] x))
> ;;Error: Second argument to def must be a Symbol
Obviously #^ is missing, hence the map is passed on to defn.
Defn expects a Symbol not a Map. => *meep*
> (defn my-fn [x] x #^{:doc "doc"})
> ;;Error: Unmatched delimiter: )
Since #^ attaches to the next thing read and there is
nothing following the reader screws up in some way.
> (defn my-fn ([x] x) {:doc "doc"})
> ;;Works
This is the syntax of defn, I believe. What ever map
you pass at the end of the definition is added to the
meta-data.
> Can anyone help me understand this please?
I'm not sure understand this meta-data stuff myself...
Sincerely
Meikel
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