1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
|
import org.scalacheck._, Prop._, Gen._, Arbitrary._
import scala.reflect.runtime.universe._, Flag._, internal.reificationSupport.SyntacticClassDef
object DefinitionDeconstructionProps
extends QuasiquoteProperties("definition deconstruction")
with TraitDeconstruction
with ClassDeconstruction
with ObjectDeconstruction
with ModsDeconstruction
with ValVarDeconstruction
with DefDeconstruction
with PackageDeconstruction
with ImportDeconstruction
trait TraitDeconstruction { self: QuasiquoteProperties =>
property("exhaustive trait matcher") = test {
def matches(line: String) {
val q"""$mods trait $name[..$targs]
extends { ..$early } with ..$parents { $self => ..$body }""" = parse(line)
}
matches("trait Foo")
matches("trait Foo[T]")
matches("trait Foo { def bar }")
matches("trait Foo extends Bar with Baz")
matches("trait Foo { self: Bippy => val x: Int = 1}")
matches("trait Foo extends { val early: Int = 1 } with Bar { val late = early }")
matches("private[Gap] trait Foo")
}
}
trait ObjectDeconstruction { self: QuasiquoteProperties =>
property("exhaustive object matcher") = test {
def matches(line: String) = {
val q"""$mods object $name extends { ..$early } with ..$parents { $self => ..$body }""" = parse(line)
}
matches("object Foo")
matches("object Foo extends Bar[T]")
matches("object Foo extends { val early: T = v } with Bar")
matches("object Foo extends Foo { selfy => body }")
matches("private[Bippy] object Foo extends Bar with Baz")
}
}
trait ClassDeconstruction { self: QuasiquoteProperties =>
property("class without params") = test {
val q"class $name { ..$body }" = q"class Foo { def bar = 3 }"
assert(body ≈ List(q"def bar = 3"))
}
property("class constructor") = test {
val q"class $name(...$argss)" = q"class Foo(x: Int)(y: Int)"
assert(argss.length == 2)
}
property("class parents") = test {
val q"class $name extends ..$parents" = q"class Foo extends Bar with Blah"
assert(parents ≈ List(tq"Bar", tq"Blah"))
}
property("class selfdef") = test {
val q"class $name { $self => }" = q"class Foo { self: T => }"
assert(self.name ≈ TermName("self") && self.tpt ≈ tq"T")
}
property("class tparams") = test {
val q"class $name[..$tparams]" = q"class Foo[A, B]"
assert(tparams.map { _.name } == List(TypeName("A"), TypeName("B")))
}
property("deconstruct bare case class") = test {
val q"$mods class $name(..$args) extends ..$parents" = q"case class Foo(x: Int)"
}
property("exhaustive class matcher") = test {
def matches(line: String) {
val q"""$classMods class $name[..$targs] $ctorMods(...$argss)
extends { ..$early } with ..$parents { $self => ..$body }""" = parse(line)
}
matches("class Foo")
matches("class Foo[T]")
matches("class Foo[T] @annot")
matches("class Foo extends Bar with Baz")
matches("class Foo { body }")
matches("class Foo extends { val early = 0 } with Any")
matches("abstract class Foo")
matches("private[Baz] class Foo")
matches("class Foo(first: A)(second: B)")
matches("class Foo(first: A) extends Bar(first) with Baz")
matches("class Foo private (first: A) { def bar }")
matches("class Foo { self => bar(self) }")
matches("case class Foo(x: Int)")
}
property("SI-7979") = test {
val PARAMACCESSOR = (1 << 29).toLong.asInstanceOf[FlagSet]
assertThrows[MatchError] {
val SyntacticClassDef(_, _, _, _, _, _, _, _, _) =
ClassDef(
Modifiers(), TypeName("Foo"), List(),
Template(
List(Select(Ident(TermName("scala")), TypeName("AnyRef"))),
noSelfType,
List(
//ValDef(Modifiers(PRIVATE | LOCAL | PARAMACCESSOR), TermName("x"), Ident(TypeName("Int")), EmptyTree),
DefDef(Modifiers(), nme.CONSTRUCTOR, List(), List(List(ValDef(Modifiers(PARAM | PARAMACCESSOR), TermName("x"),
Ident(TypeName("Int")), EmptyTree))), TypeTree(), Block(List(pendingSuperCall), Literal(Constant(())))))))
}
}
}
trait ModsDeconstruction { self: QuasiquoteProperties =>
property("deconstruct mods") = test {
val mods = Modifiers(IMPLICIT | PRIVATE, TermName("foobar"), Nil)
val q"$mods0 def foo" = q"$mods def foo"
assert(mods0 ≈ mods)
}
property("@$annot def foo") = forAll { (annotName: TypeName) =>
val q"@$annot def foo" = q"@$annotName def foo"
annot ≈ Apply(Select(New(Ident(annotName)), nme.CONSTRUCTOR), List())
}
property("@$annot(..$args) def foo") = forAll { (annotName: TypeName, tree: Tree) =>
val q"@$annot(..$args) def foo" = q"@$annotName($tree) def foo"
annot ≈ Ident(annotName) && args ≈ List(tree)
}
property("@..$annots def foo") = test {
val a = q"new a"
val b = q"new b"
val q"@..$annots def foo" = q"@$a @$b def foo"
annots ≈ List(a, b)
}
property("@$annot @..$annots def foo") = test {
val a = q"new a"
val b = q"new b"
val c = q"new c"
val q"@$first @..$rest def foo" = q"@$a @$b @$c def foo"
assert(first ≈ a)
assert(rest ≈ List(b, c))
}
property("@..$anots @$annot def foo") = test {
val a = q"new a"
val b = q"new b"
val c = q"new c"
val q"@..$init @$last def foo" = q"@$a @$b @$c def foo"
assert(init ≈ List(a, b))
assert(last ≈ c)
}
}
trait ValVarDeconstruction { self: QuasiquoteProperties =>
property("exhaustive val matcher") = test {
def matches(line: String) { val q"$mods val $name: $tpt = $rhs" = parse(line) }
matches("val x: Int")
matches("val x: Int = 1")
matches("lazy val x: Int = 1")
matches("implicit val x = 1")
assertThrows[MatchError] { matches("var x = 1") }
}
property("exhaustive var matcher") = test {
def matches(line: String) { val q"$mods var $name: $tpt = $rhs" = parse(line) }
matches("var x: Int")
matches("var x: Int = 1")
matches("var x = 1")
assertThrows[MatchError] { matches("val x = 1") }
}
}
trait PackageDeconstruction { self: QuasiquoteProperties =>
property("exhaustive package matcher") = test {
def matches(line: String) { val q"package $name { ..$body }" = parse(line) }
matches("package foo { }")
matches("package foo { class C }")
matches("package foo.bar { }")
matches("package bippy.bongo { object A; object B }")
matches("package bippy { package bongo { object O } }")
}
property("exhaustive package object matcher") = test {
def matches(line: String) {
val q"package object $name extends { ..$early } with ..$parents { $self => ..$body }" = parse(line)
}
matches("package object foo")
matches("package object foo { def baz }")
matches("package object foo { self => }")
matches("package object foo extends mammy with daddy { def baz }")
matches("package object foo extends { val early = 1 } with daddy")
assertThrows[MatchError] { matches("object foo") }
}
}
trait DefDeconstruction { self: QuasiquoteProperties =>
property("exhaustive def matcher") = test {
def matches(line: String) = {
val t = parse(line)
val q"$mods0 def $name0[..$targs0](...$argss0): $restpe0 = $body0" = t
val q"$mods1 def $name1[..$targs1](...$argss1)(implicit ..$impl1): $restpe1 = $body1" = t
}
matches("def foo = foo")
matches("implicit def foo: Int = 2")
matches("def foo[T](x: T): T = x")
matches("def foo[A: B] = implicitly[B[A]]")
matches("private def foo = 0")
matches("def foo[A <% B] = null")
matches("def foo(one: One)(two: Two) = (one, two)")
matches("def foo[T](args: T*) = args.toList")
}
property("extract implicit arg list (1)") = test {
val q"def foo(...$argss)(implicit ..$impl)" = q"def foo(x: Int)(implicit y: Int)"
assert(impl ≈ List(q"${Modifiers(IMPLICIT | PARAM)} val y: Int"))
}
property("extract implicit arg list (2)") = test {
val q"def foo(...$argss)(implicit ..$impl)" = q"def foo(x: Int)"
assert(impl.isEmpty)
}
}
trait ImportDeconstruction { self: QuasiquoteProperties =>
property("exhaustive import matcher") = test {
def matches(line: String) = {
val q"import $ref.{..$sels}" = parse(line)
}
matches("import foo.bar")
matches("import foo.{bar, baz}")
matches("import foo.{a => b, c => d}")
matches("import foo.{poision => _, _}")
matches("import foo.bar.baz._")
}
property("extract import binding") = test {
val q"import $_.$sel" = q"import foo.bar"
val pq"bar" = sel
}
property("extract import wildcard") = test {
val q"import $_.$sel" = q"import foo._"
val pq"_" = sel
}
property("extract import rename") = test {
val q"import $_.$sel" = q"import foo.{bar => baz}"
val pq"bar -> baz" = sel
val pq"$left -> $right" = sel
val pq"bar" = left
val pq"baz" = right
}
property("extract import unimport") = test {
val q"import $_.$sel" = q"import foo.{bar => _}"
val pq"bar -> _" = sel
val pq"$left -> $right" = sel
val pq"bar" = left
val pq"_" = right
}
property("splice names into import selector") = forAll {
(expr: Tree, plain: TermName, oldname: TermName, newname: TermName, discard: TermName) =>
val Import(expr1, List(
ImportSelector(plain11, _, plain12, _),
ImportSelector(oldname1, _, newname1, _),
ImportSelector(discard1, _, wildcard, _))) =
q"import $expr.{$plain, $oldname => $newname, $discard => _}"
expr1 ≈ expr && plain11 == plain12 && plain12 == plain &&
oldname1 == oldname && newname1 == newname && discard1 == discard && wildcard == nme.WILDCARD
}
}
|