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Type-aware += checks for declared collection members; preserve field type metadata

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sergeych committed 2026-03-12 19:41:42 +03:00
1 parent c9021eb9cf
commit 9417f8f0cc
8 files changed
+205 -32
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lynglib/src/commonTest/kotlin/TypesTest.kt
+77 -31
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@@ -20,6 +20,7 @@ import net.sergeych.lyng.Script
import net.sergeych.lyng.ScriptError
import net.sergeych.lyng.eval
import kotlin.test.Test
import kotlin.test.assertEquals
import kotlin.test.assertFailsWith
import kotlin.test.assertTrue
@@ -433,35 +434,80 @@ class TypesTest {
""".trimIndent())
}
// @Test
// fun testAliasesInGenerics1() = runTest {
// val scope = Script.newScope()
// scope.eval("""
// type IntList<T: Int> = List<T>
// type IntMap<K,V> = Map<K,V>
// type IntSet<T: Int> = Set<T>
// type IntPair<T: Int> = Pair<T,T>
// type IntTriple<T: Int> = Triple<T,T,T>
// type IntQuad<T: Int> = Quad<T,T,T,T>
//
// import lyng.buffer
// type Tag = String | Buffer
//
// class X {
// var tags: Set<Tag> = Set()
// }
// val x = X()
// x.tags += "tag1"
// assertEquals(Set("tag1"), x.tags)
// x.tags += "tag2"
// assertEquals(Set("tag1", "tag2"), x.tags)
// x.tags += Buffer("tag3")
// assertEquals(Set("tag1", "tag2", Buffer("tag3")), x.tags)
// x.tags += Buffer("tag4")
// assertEquals(Set("tag1", "tag2", Buffer("tag3"), Buffer("tag4")), x.tags)
// x.tags += "tag3"
// x.tags += "tag4"
// assertEquals(Set("tag1", "tag2", Buffer("tag3"), Buffer("tag4")), x.tags)
// """)
// }
@Test
fun testAliasesInGenerics1() = runTest {
val scope = Script.newScope()
scope.eval("""
type IntList<T: Int> = List<T>
type IntMap<K,V> = Map<K,V>
type IntSet<T: Int> = Set<T>
type IntPair<T: Int> = Pair<T,T>
type IntTriple<T: Int> = Triple<T,T,T>
type IntQuad<T: Int> = Quad<T,T,T,T>
import lyng.buffer
type Tag = String | Buffer
class X {
var tags: Set<Tag> = Set()
}
val x = X()
x.tags += "tag1"
assertEquals(Set("tag1"), x.tags)
x.tags += "tag2"
assertEquals(Set("tag1", "tag2"), x.tags)
x.tags += Buffer("tag3")
assertEquals(Set("tag1", "tag2", Buffer("tag3")), x.tags)
x.tags += Buffer("tag4")
assertEquals(Set("tag1", "tag2", Buffer("tag3"), Buffer("tag4")), x.tags)
""")
scope.eval("""
assert(x is X)
x.tags += "42"
assertEquals(Set("tag1", "tag2", Buffer("tag3"), Buffer("tag4"), "42"), x.tags)
""".trimIndent())
// now this must fail becaise element type does not match the declared:
assertFailsWith<ScriptError> {
scope.eval(
"""
x.tags += 42
""".trimIndent()
)
}
}
@Test
fun testAliasesInGenericsList1() = runTest {
val scope = Script.newScope()
scope.eval("""
import lyng.buffer
type Tag = String | Buffer
class X {
var tags: List<Tag> = List()
}
val x = X()
x.tags += "tag1"
assertEquals(List("tag1"), x.tags)
x.tags += "tag2"
assertEquals(List("tag1", "tag2"), x.tags)
x.tags += Buffer("tag3")
assertEquals(List("tag1", "tag2", Buffer("tag3")), x.tags)
x.tags += ["tag4", Buffer("tag5")]
assertEquals(List("tag1", "tag2", Buffer("tag3"), "tag4", Buffer("tag5")), x.tags)
""")
scope.eval("""
assert(x is X)
x.tags += "42"
assertEquals(List("tag1", "tag2", Buffer("tag3"), "tag4", Buffer("tag5"), "42"), x.tags)
""".trimIndent())
assertFailsWith<ScriptError> {
scope.eval(
"""
x.tags += 42
""".trimIndent()
)
}
}
}