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
|
import org.scalacheck._, Prop._, Gen._, Arbitrary._
import scala.reflect.runtime.universe._, Flag._, internal.reificationSupport._
object TypecheckedProps extends QuasiquoteProperties("typechecked")
with TypecheckedTypes {
property("tuple term") = test {
val q"(..$elements)" = typecheck(q"(1, 2)")
assert(elements ≈ List(q"1", q"2"))
}
property("for/for-yield") = test {
val enums = fq"x <- xs" :: fq"x1 = x + 1" :: fq"if x1 % 2 == 0" :: Nil
val body = q"x1"
val xs = q"val xs = List(1, 2, 3)"
val q"$_; for(..$enums0) yield $body0" = typecheck(q"$xs; for(..$enums) yield $body")
assert(enums0 ≈ enums)
assert(body0 ≈ body)
val q"$_; for(..$enums1) $body1" = typecheck(q"$xs; for(..$enums) $body")
assert(enums1 ≈ enums)
assert(body1 ≈ body)
}
property("for .filter instead of .withFilter") = test {
val enums = fq"foo <- new Foo" :: fq"if foo != null" :: Nil
val body = q"foo"
val q"$_; for(..$enums1) yield $body1" = typecheck(q"""
class Foo { def map(f: Any => Any) = this; def withFilter(cond: Any => Boolean) = this }
for(..$enums) yield $body
""")
assert(enums1 ≈ enums)
assert(body1 ≈ body)
}
property("extract UnApply (1)") = test {
val q"object $_ { $_; $_; $m }" = typecheck(q"""
object Test {
class Cell(val x: Int)
object Cell { def unapply(c: Cell) = Some(c.x) }
new Cell(0) match { case Cell(v) => v }
}
""")
val q"$_ match { case $f(..$args) => $_ }" = m
assert(f ≈ pq"Test.this.Cell")
assert(args ≈ List(pq"v"))
}
property("extract UnApply (2)") = test {
val q"object $_ { $_; $m }" = typecheck(q"""
object Test {
case class Cell(val x: Int)
new Cell(0) match { case Cell(v) => v }
}
""")
val q"$_ match { case ${f: TypeTree}(..$args) => $_ }" = m
assert(f.original ≈ pq"Test.this.Cell")
assert(args ≈ List(pq"v"))
}
property("extract inferred val type") = test {
val typechecked = typecheck(q"val x = 42")
val q"val x = 42" = typechecked
val q"val x: ${tq""} = 42" = typechecked
val q"val x: ${t: Type} = 42" = typechecked
}
property("class with param (1)") = test {
val paramName = TermName("x")
val q"class $_($param)" = typecheck(q"class Test(val $paramName: Int)")
assert(param.name == paramName)
}
property("class with param (2)") = test {
val paramName = TermName("y")
val q"{class $_($param)}" = typecheck(q"class Test(val $paramName: Int = 3)")
assert(param.name == paramName)
assert(param.rhs ≈ q"3")
}
property("class with params") = test {
val pName1 = TermName("x1")
val pName2 = TermName("x2")
val q"{class $_($param1)(..$params2)}" = typecheck(q"class Test(val x0: Float)(val $pName1: Int = 3, $pName2: String)")
val List(p1, p2, _*) = params2
assert(p1.name == pName1)
assert(p2.name == pName2)
assert(params2.size == 2)
}
property("implicit class") = test {
val clName = TypeName("Test")
val paramName = TermName("x")
val q"{implicit class $name($param)}" = typecheck(q"implicit class $clName(val $paramName: String)")
assert(name == clName)
assert(param.name == paramName)
}
property("block with lazy") = test {
val lazyName = TermName("x")
val lazyRhsVal = 42
val lazyRhs = Literal(Constant(lazyRhsVal))
val q"{lazy val $pname = $rhs}" = typecheck(q"{lazy val $lazyName = $lazyRhsVal}")
assert(pname == lazyName)
assert(rhs ≈ lazyRhs)
}
property("class with lazy") = test {
val clName = TypeName("Test")
val paramName = TermName("x")
val q"class $name{lazy val $pname = $_}" = typecheck(q"class $clName {lazy val $paramName = 42}")
assert(name == clName)
assert(pname == paramName)
}
property("case class with object") = test {
val defName = TermName("z")
val defRhsVal = 42
val defRhs = Literal(Constant(defRhsVal))
val q"object $_{ $_; object $_ extends ..$_ {def $name = $rhs} }" =
typecheck(q"""
object Test{
case class C(x: Int) { def y = x };
object C { def $defName = $defRhsVal }
}""")
assert(name == defName)
assert(rhs ≈ defRhs)
}
property("partial function") = test {
val q"{ case ..$cases }: $ascr" = typecheck(q"{ case 1 => () }: PartialFunction[Int, Unit]")
assert(cases ≈ q"{ case 1 => () }".cases)
}
}
trait TypecheckedTypes { self: QuasiquoteProperties =>
property("type ident") = test {
val q"$_; type $_ = $tpt" = typecheck(q"class C; type T = C")
val tq"C" = tpt
}
property("type select") = test {
val tq"scala.Int" = typecheckTyp(tq"Int")
}
property("this type select") = test {
val q"class $_ { $_; type $_ = $tpt }" = typecheck(q"class C { type A = Int; type B = this.A }")
val tq"this.$name" = tpt
val TypeName("A") = name
}
property("super type select") = test {
val q"$_; class $_ extends $_ { type $_ = $tpt }" =
typecheck(q"class C1 { type A = Int }; class C2 extends C1 { type B = super[C1].A }")
val tq"$empty.super[$c1].$a" = tpt
val TypeName("") = empty
val TypeName("C1") = c1
val TypeName("A") = a
}
property("applied type") = test {
val tt = typecheckTyp(tq"Map[Int, Int]")
val tq"$tpt[..$tpts]" = tt
val tq"scala.this.Predef.Map" = tpt
val List(tq"scala.Int", tq"scala.Int") = tpts
}
property("tuple type") = test {
val tq"(..$els0)" = typecheckTyp(tq"Unit")
assert(els0.isEmpty)
val tq"(..$els1)" = typecheckTyp(tq"(Int, Int)")
val List(tq"scala.Int", tq"scala.Int") = els1
}
property("function type") = test {
val tq"(..$argtpes) => $restpe" = typecheckTyp(tq"(Int, Int) => Int")
val List(tq"scala.Int", tq"scala.Int") = argtpes
val tq"scala.Int" = restpe
}
property("compound type") = test {
val tq"..$parents { ..$defns }" = typecheckTyp(tq"Int { def x: Int }")
val List(tq"Int") = parents
val List(q"def x: Int") = defns
}
property("singleton type") = test {
val tq"$ref.type" = typecheckTyp(tq"scala.Predef.type")
val q"scala.Predef" = ref
}
property("type projection") = test {
val tq"$tpt#$name" = typecheckTyp(tq"({ type T = Int })#T")
val TypeName("T") = name
val tq"{ type T = Int }" = tpt
}
property("annotated type") = test {
val tq"$tpt @$annot" = typecheckTyp(tq"Int @unchecked")
val tq"scala.Int" = tpt
val tq"unchecked" = annot
}
property("existential type") = test {
val tq"$tpt forSome { ..$defns }" = typecheckTyp(tq"T forSome { type T }")
val tq"T" = tpt
val q"type T" :: Nil = defns
}
}
|
