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engine, lang: Modern exported resources

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I've been waiting to write this patch for a long time. I firmly believe
that the idea of "exported resources" was truly a brilliant one, but
which was never even properly understood by its original inventors! This
patch set aims to show how it should have been done.

The main differences are:

* Real-time modelling, since "once per run" makes no sense.
* Filter with code/functions not language syntax.
* Directed exporting to limit the intended recipients.

The next step is to add more "World" reading and filtering functions to
make it easy and expressive to make your selection of resources to
collect!
This commit is contained in:
James Shubin
2025-03-24 18:54:06 -04:00
parent 955112f64f
commit 045b29291e
24 changed files with 2367 additions and 312 deletions
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27
lang/funcs/funcs.go
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@@ -90,6 +90,33 @@ const (
// as. This starts with an underscore so that it cannot be used from the
// lexer.
StructLookupOptionalFuncName = "_struct_lookup_optional"
// CollectFuncName is the name this function is registered as. This
// starts with an underscore so that it cannot be used from the lexer.
CollectFuncName = "_collect"
// CollectFuncInFieldName is the name of the name field in the struct.
CollectFuncInFieldName = "name"
// CollectFuncInFieldHost is the name of the host field in the struct.
CollectFuncInFieldHost = "host"
// CollectFuncInType is the most complex of the three possible input
// types. The other two possible ones are str or []str.
CollectFuncInType = "[]struct{" + CollectFuncInFieldName + " str; " + CollectFuncInFieldHost + " str}"
// CollectFuncOutFieldName is the name of the name field in the struct.
CollectFuncOutFieldName = "name"
// CollectFuncOutFieldHost is the name of the host field in the struct.
CollectFuncOutFieldHost = "host"
// CollectFuncOutFieldData is the name of the data field in the struct.
CollectFuncOutFieldData = "data"
// CollectFuncOutStruct is the struct type that we return a list of.
CollectFuncOutStruct = "struct{" + CollectFuncOutFieldName + " str; " + CollectFuncOutFieldHost + " str; " + CollectFuncOutFieldData + " str}"
// CollectFuncOutType is the expected return type, the data field is an
// encoded resource blob.
CollectFuncOutType = "[]" + CollectFuncOutStruct
)
// registeredFuncs is a global map of all possible funcs which can be used. You