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add derive copy and cleanup naming

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Brendan Hansknecht 2022-12-12 16:35:04 -08:00
parent fb657f101d
commit 48ce687aa6
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2 changed files with 36 additions and 9 deletions
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4
crates/glue/src/RocType.roc
View file

@ -77,11 +77,11 @@ RocType : [
EmptyTagUnion,
Struct {
name: Str,
fields: List { name: Str, type: TypeId }
fields: List { name: Str, id: TypeId }
},
TagUnionPayload {
name: Str,
fields: List { discriminant: Nat, type: TypeId },
fields: List { discriminant: Nat, id: TypeId },
},
## A recursive pointer, e.g. in StrConsList : [Nil, Cons Str StrConsList],
## this would be the field of Cons containing the (recursive) StrConsList type,

41
crates/glue/src/RustGlue.roc
View file

@ -82,14 +82,14 @@ generateStruct = \buf, types, id, name, fields, visibility ->
structType = getType types id
buf
|> addDeriveStr structType types IncludeDebug
|> addDeriveStr types structType IncludeDebug
|> Str.concat "#[repr(\(repr))]\n\(pub) struct \(escapedName) {\n"
|> \b -> List.walk fields b (generateStructFields types)
|> Str.concat "}\n\n"
generateStructFields = \types ->
\accum, { name: fieldName, type: fieldType } ->
typeStr = typeName types fieldType
\accum, { name: fieldName, id } ->
typeStr = typeName types id
escapedFieldName = escapeKW fieldName
Str.concat accum "\(indent)pub \(escapedFieldName): \(typeStr),\n"
@ -97,12 +97,13 @@ generateStructFields = \types ->
nameTagUnionPayloadFields = \fields ->
# Tag union payloads have numbered fields, so we prefix them
# with an "f" because Rust doesn't allow struct fields to be numbers.
List.map fields \{ discriminant, type } ->
List.map fields \{ discriminant, id } ->
discStr = Num.toStr discriminant
{ name: "f\(discStr)", type }
{ name: "f\(discStr)", id }
addDeriveStr = \buf, _type, _types, includeDebug ->
addDeriveStr = \buf, types, type, includeDebug ->
# TODO: full derive impl porting.
buf
|> Str.concat "#[derive(Clone, "
|> \b ->
@ -111,9 +112,35 @@ addDeriveStr = \buf, _type, _types, includeDebug ->
Str.concat b "Debug, "
ExcludeDebug ->
b # TODO: full derive impl porting.
b
|> \b ->
if !(cannotDeriveCopy types type) then
Str.concat b "Copy, "
else
b
|> Str.concat "PartialEq, PartialOrd)]\n"
cannotDeriveCopy = \types, type ->
when type is
Unit | EmptyTagUnion | Bool | Num _ | TagUnion (Enumeration _) | Function _ -> Bool.false
RocStr | RocList _ | RocDict _ _ | RocSet _ | RocBox _ | TagUnion ( NullableUnwrapped _ ) | TagUnion ( NullableWrapped _ ) | TagUnion ( Recursive _ ) | TagUnion ( NonNullableUnwrapped _) | RecursivePointer _ -> Bool.true
TagUnion (SingleTagStruct { payloadFields }) ->
List.any payloadFields \id -> cannotDeriveCopy types (getType types id)
TagUnion (NonRecursive {tags}) ->
List.any tags \{payload} ->
when payload is
Some id -> cannotDeriveCopy types (getType types id)
None -> Bool.false
RocResult okId errId ->
cannotDeriveCopy types (getType types okId)
|| cannotDeriveCopy types (getType types errId)
Struct { fields} ->
List.any fields \{ id } -> cannotDeriveCopy types (getType types id)
TagUnionPayload { fields} ->
List.any fields \{ id } -> cannotDeriveCopy types (getType types id)
_ -> crash "ugh"
typeName = \types, id ->
when getType types id is
Unit -> "()"