91 lines
2.5 KiB
Nim
91 lines
2.5 KiB
Nim
import
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unittest,
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../stew/shims/macros
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template unknown() {.pragma.}
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template zero() {.pragma.}
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template one(one: string) {.pragma.}
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template two(one: string, two: string) {.pragma.}
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type
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MyType[T] = object
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myField {.zero, one("foo"), two("foo", "bar")}: string
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myGeneric {.zero.}: T
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case kind {.zero.}: bool
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of true:
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first {.zero.}: string
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else:
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second {.zero.}: string
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FieldKind = enum
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KindA
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KindB
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BaseType = object of RootObj
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baseField: int
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case baseCaseField: FieldKind
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of KindA:
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baseA: int
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of KindB:
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discard
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DerivedType = ref object of BaseType
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derivedField: int
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DerivedFromRefType = ref object of DerivedType
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anotherDerivedField: string
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EmptyObject = object
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EmptyRefObject = ref object
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macro getFieldsLists(T: type): untyped =
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result = newTree(nnkBracket)
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var resolvedType = skipPtr skipRef getType(T)[1]
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doAssert resolvedType.kind == nnkSym
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var objectType = getImpl(resolvedType)
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doAssert objectType.kind == nnkTypeDef
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for f in recordFields(objectType):
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result.add newLit($f.name)
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static:
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doAssert getFieldsLists(DerivedFromRefType) == [
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"baseField",
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"baseCaseField",
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"baseA",
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"derivedField",
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"anotherDerivedField"
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]
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doAssert getFieldsLists(EmptyObject).len == 0
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doAssert getFieldsLists(EmptyRefObject).len == 0
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let myType = MyType[string](myField: "test", myGeneric: "test", kind: true, first: "test")
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suite "Macros":
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test "hasCustomPragmaFixed":
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check:
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not myType.type.hasCustomPragmaFixed("myField", unknown)
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myType.type.hasCustomPragmaFixed("myField", zero)
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myType.type.hasCustomPragmaFixed("myField", one)
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myType.type.hasCustomPragmaFixed("myField", two)
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myType.type.hasCustomPragmaFixed("myGeneric", zero)
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myType.type.hasCustomPragmaFixed("kind", zero)
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myType.type.hasCustomPragmaFixed("first", zero)
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myType.type.hasCustomPragmaFixed("second", zero)
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test "getCustomPragmaFixed":
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check:
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myType.type.getCustomPragmaFixed("myField", unknown).isNil
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myType.type.getCustomPragmaFixed("myField", zero).isNil
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myType.type.getCustomPragmaFixed("myField", one) is string
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myType.type.getCustomPragmaFixed("myField", two) is tuple[one: string, two: string]
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myType.type.getCustomPragmaFixed("myGeneric", zero).isNil
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myType.type.getCustomPragmaFixed("kind", zero).isNil
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myType.type.getCustomPragmaFixed("first", zero).isNil
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myType.type.getCustomPragmaFixed("second", zero).isNil
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