Introduce Gen{} struct for configurability#94
Introduce Gen{} struct for configurability#94whyrusleeping merged 6 commits intowhyrusleeping:masterfrom
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One minor problem is that |
| Name: f.Name + "[" + f.IterLabel + "]", | ||
| } | ||
| err := emitCborUnmarshalStructField(w, subf) | ||
| err := g.emitCborUnmarshalStructField(w, subf) |
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Leave it for now, but we can probably fold the writer into Gen in the future.
| MaxArrayLength: 10, | ||
| MaxByteLength: 9, | ||
| MaxStringLength: 8, | ||
| }.WriteTupleEncodersToFile("testing/cbor_options_gen.go", "testing", |
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Any reason not to change this to:
err := cbg.Gen{
MaxArrayLength: 10,
MaxByteLength: 9,
MaxStringLength: 8,
TupleStructs: []any{
types.LimitedStruct{},
},
TransparentTypes: ...
}.WriteToFile("testing/ccbor_options_gen.go", "testing")I ask because this would let easily use different representations for different types.
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no reason other than wanting to keep the scope of this minimal; I was tempted to deprecate the Write{Type}* functions and do this kind of thing. Although in my version I was going to go with a TupleStruct bool in the config, but moving the types list also into the config could also work.
maybe we should hold off on this for a future change? Because at least with the changes now it's all backward compatible and doesn't require anyone to change anything except if they want different defaults.
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We could make it backwards compatible, but not cleanly because the function specifies the encoding. My idea was to have separate fields (TupleStructs, TransparentTypes, MapStructs, etc.) for different encodings so we can put them all in the same file.
Alternatively, we can just have multiple files. That's really not an issue, honestly.
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(I'm not a huge fan of mixing "tuple encoding" and "transparent types" as we do now as they're different encodings)
| type Gen struct { | ||
| MaxArrayLength int // Default: 8192 (MaxLength) | ||
| MaxByteLength int // Default: 2<<20 (ByteArrayMaxLen) | ||
| MaxStringLength int // Default: 8192 (MaxLength) |
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Was this actually 8192 before? That's... ok, I guess. But strange.
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yeah, strange, but also not heavily used in filecoin, so not surprising that it hasn't come up before
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yeah, was just some number that got picked as 'probably big enough for a default'
| return fmt.Sprintf(`%s.ReadHeader()`, rdr) | ||
| }, | ||
| "MaxLen": func(val int, def string) string { | ||
| "MaxLen": func(val int, defaultType string) string { |
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In retrospect, we probably could have just gone with a number (enum) for defaultType.
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Yeah, but this comes in from a template so we'd end up having to use integers there which is more opaque {{ MaxLen .MaxLen "String" }} -> {{ MaxLen .MaxLen 2 }}. Unless we share them as functions that take no arguments, but then we'd have to pipe: {{ String | MaxLen .MaxLen }}. Unless I'm missing a template feature that could be used here?
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Oh! Thats annoying, i'm sorry for that. |
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This looks great, Thank you @rvagg ! And really sorry about breaking downstreams on the update, forgot about how annoying turning an untyped const into a typed var is...
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Ref: #92
Reverts #92 because the breakage is very ouchy.
Just starting with the two main globals, but this does open up some interesting possibilities!