No, the final enum has the export marker and the group macro adds an entry for
the final enum and creates an optional enum with suffix "Msg" for actions (with
the export marker too):
import macros
# Groups Enum
var groupEnum {.compileTime.} = newNimNode(nnkEnumTy).add(
newEmptyNode(), newIdentNode("gGeneric")
)
# Group Builder
macro group*(name: untyped, messages: untyped) =
# Expects Ident and StmtList
name.expectKind(nnkIdent)
messages.expectKind(nnkStmtList)
# Add the Group name to Group Enums
groupEnum.add(
newIdentNode("g" & name.strVal)
)
# Create a nameMsg enum if is not discarded
if messages[0].kind != nnkDiscardStmt:
result = nnkStmtList.newTree()
# Create Enum Node
var msgNode = newNimNode(nnkEnumTy)
msgNode.add(newEmptyNode())
for m in messages:
m.expectKind(nnkIdent)
msgNode.add(
newIdentNode("msg" & m.strVal)
)
# Create Type Enum Node
result.add(
newNimNode(nnkTypeSection).add(
newNimNode(nnkTypeDef).add(
newNimNode(nnkPostfix).add(
newIdentNode("*"),
newIdentNode(name.strVal & "Msg")
),
newEmptyNode(),
msgNode
)
)
)
# Generates Group Enum
macro groupType*(name: untyped) =
# Expect name as ident
name.expectKind(nnkIdent)
# Create a new Enum type
result = newNimNode(nnkTypeSection).add(
newNimNode(nnkTypeDef).add(
newNimNode(nnkPostfix).add(
newIdentNode("*"), name
),
newEmptyNode(),
groupEnum
)
)
group Window:
Open
Close
# Generate Groups Type
groupType(Groups)
when isMainModule:
echo sizeof(Groups)
var s = {gWindow}
echo s
Run
i noticed that calling "group" macro after "groupType" macro doesn't add the
group to enum too
# Called before groupType
group Window:
Exit
# Generate Groups Type, only has Window
groupType(Groups)
# Called after groupType
group SubWindow:
Move
Resize
when isMainModule:
echo sizeof(Groups)
var s = {gWindow, gSubWindow} # undeclared identifier 'gSubWindow'
echo s
Run
maybe is impossible for now modify the generated enum type at every call of
"group" macro. a workaround for this is still use a counter var and use a fixed
set size (`set[0..63]`)
