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Refactor decodeClassObj to mimic compiler behavior for qualified names, add evaluateQualifiedNameAsCompiled.

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Sergey Chernov 2025-12-14 00:06:46 +01:00
parent d487886c8f
commit 5a8881bfd5
1 changed files with 22 additions and 11 deletions
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33
lynglib/src/commonMain/kotlin/net/sergeych/lynon/LynonDecoder.kt
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@ -17,10 +17,9 @@
package net.sergeych.lynon
import net.sergeych.lyng.Pos
import net.sergeych.lyng.Scope
import net.sergeych.lyng.obj.Obj
import net.sergeych.lyng.obj.ObjClass
import net.sergeych.lyng.obj.ObjString
import net.sergeych.lyng.obj.*
open class LynonDecoder(val bin: BitInput, val settings: LynonSettings = LynonSettings.default) {
@ -83,17 +82,29 @@ open class LynonDecoder(val bin: BitInput, val settings: LynonSettings = LynonSe
scope.raiseClassCastError("Expected obj class but got ${it::class.simpleName}")
it
} ?: run {
println("NotFound: $className, trying eval")
val fallback = runCatching { scope.eval(className.value) }.getOrNull()
println("Fallback result: $fallback")
if (fallback != null) {
println("Fallback to eval successful")
fallback as ObjClass
}
else scope.raiseSymbolNotFound("can't deserialize: not found type $className")
// Precisely mimic what `scope.eval(className.value)` would compile and execute for
// a simple qualified name: LocalVarRef(head) followed by chained FieldRef segments.
val evaluated = evaluateQualifiedNameAsCompiled(scope, className.value)
if (evaluated !is ObjClass)
scope.raiseClassCastError("Expected obj class but got ${evaluated::class.simpleName}")
evaluated
}
}
// Build and execute the exact ObjRef chain that the compiler would emit for an identifier
// with optional dotted selectors, e.g., "A.B.C" -> LocalVarRef("A") -> FieldRef(..., "B") -> FieldRef(..., "C")
private suspend fun evaluateQualifiedNameAsCompiled(scope: Scope, name: String): Obj {
val trimmed = name.trim()
if (trimmed.isEmpty()) scope.raiseSymbolNotFound("empty identifier")
val parts = trimmed.split('.')
// Use built-in position; eval() would carry a Source position, which does not affect resolution semantics here
var ref: ObjRef = LocalVarRef(parts[0], Pos.builtIn)
for (i in 1 until parts.size) {
ref = FieldRef(ref, parts[i], false)
}
return ref.evalValue(scope)
}
suspend fun decodeAnyList(scope: Scope, fixedSize: Int? = null): MutableList<Obj> {
return if (bin.getBit() == 1) {
// homogenous