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some more docs

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Sergey Chernov 2025-11-01 22:10:26 +01:00
parent b8d6ff01a6
commit f00631cd88
1 changed files with 12 additions and 0 deletions
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12
lynglib/src/commonMain/kotlin/net/sergeych/lyng/obj/ObjDynamic.kt
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@ -47,10 +47,18 @@ class ObjDynamicContext(val delegate: ObjDynamic) : Obj() {
} }
} }
/**
* Object that delegates all its field access/invocation operations to a callback. It is used to implement dynamic
* objects using "dynamic" keyword.
*/
open class ObjDynamic(var readCallback: Statement? = null, var writeCallback: Statement? = null) : Obj() { open class ObjDynamic(var readCallback: Statement? = null, var writeCallback: Statement? = null) : Obj() {
override val objClass: ObjClass = type override val objClass: ObjClass = type
/**
* Use read callback to dynamically resolve the field name. Note that it does not work
* with method invocation which is implemented separately in [invokeInstanceMethod] below.
*/
override suspend fun readField(scope: Scope, name: String): ObjRecord { override suspend fun readField(scope: Scope, name: String): ObjRecord {
return readCallback?.execute(scope.createChildScope(Arguments(ObjString(name))))?.let { return readCallback?.execute(scope.createChildScope(Arguments(ObjString(name))))?.let {
if (writeCallback != null) if (writeCallback != null)
@ -61,6 +69,10 @@ open class ObjDynamic(var readCallback: Statement? = null, var writeCallback: St
?: super.readField(scope, name) ?: super.readField(scope, name)
} }
/**
* Notice that invocation currently does not rely on [readField], which is a buffy moment to be reconsidered
* in the future, so we implement it separately:
*/
override suspend fun invokeInstanceMethod( override suspend fun invokeInstanceMethod(
scope: Scope, scope: Scope,
name: String, name: String,