Cannot use type T as a reified parameter, use class instead
Android Studio 3.4
Kotlin 1.3.10
I have the following method that calls findPreferences to return the correct value that is stored in shared preferences. However, as I am using reified the findPreferences give me an error: Cannot use type T as a reified parameter.
Is there anyway I can get this to work?
fun <T: Any> getValue(key: String, defaultValue: T?): T {
return findPreferences(key, defaultValue)
}
This is the method that will return the value based on the key
@Suppress("unchecked_cast")
inline fun <reified T: Any> findPreferences(key: String, defaultValue: T?): T {
with(sharedPreferences) {
val result: Any = when(defaultValue) {
is Boolean -> getBoolean(key, default)
is Int -> getInt(key, defaultValue)
is Long -> getLong(key, defaultValue)
is Float -> getFloat(key, defaultValue)
is String -> getString(key, defaultValue)
else -> {
throw UnsupportedOperationException("Cannot find preference casting error")
}
}
return result as T
}
}
android generics kotlin kotlin-reified-type-parameters asked Jan 20 at 3:20
ant2009ant2009
674117320502
add a comment |
Android Studio 3.4
Kotlin 1.3.10
I have the following method that calls findPreferences to return the correct value that is stored in shared preferences. However, as I am using reified the findPreferences give me an error: Cannot use type T as a reified parameter.
Is there anyway I can get this to work?
fun <T: Any> getValue(key: String, defaultValue: T?): T {
return findPreferences(key, defaultValue)
}
This is the method that will return the value based on the key
@Suppress("unchecked_cast")
inline fun <reified T: Any> findPreferences(key: String, defaultValue: T?): T {
with(sharedPreferences) {
val result: Any = when(defaultValue) {
is Boolean -> getBoolean(key, default)
is Int -> getInt(key, defaultValue)
is Long -> getLong(key, defaultValue)
is Float -> getFloat(key, defaultValue)
is String -> getString(key, defaultValue)
else -> {
throw UnsupportedOperationException("Cannot find preference casting error")
}
}
return result as T
}
}
asked Jan 20 at 3:20
ant2009ant2009
674117320502
add a comment |
Android Studio 3.4
Kotlin 1.3.10
I have the following method that calls findPreferences to return the correct value that is stored in shared preferences. However, as I am using reified the findPreferences give me an error: Cannot use type T as a reified parameter.
Is there anyway I can get this to work?
fun <T: Any> getValue(key: String, defaultValue: T?): T {
return findPreferences(key, defaultValue)
}
This is the method that will return the value based on the key
@Suppress("unchecked_cast")
inline fun <reified T: Any> findPreferences(key: String, defaultValue: T?): T {
with(sharedPreferences) {
val result: Any = when(defaultValue) {
is Boolean -> getBoolean(key, default)
is Int -> getInt(key, defaultValue)
is Long -> getLong(key, defaultValue)
is Float -> getFloat(key, defaultValue)
is String -> getString(key, defaultValue)
else -> {
throw UnsupportedOperationException("Cannot find preference casting error")
}
}
return result as T
}
}
asked Jan 20 at 3:20
ant2009ant2009
674117320502
Android Studio 3.4
Kotlin 1.3.10
I have the following method that calls findPreferences to return the correct value that is stored in shared preferences. However, as I am using reified the findPreferences give me an error: Cannot use type T as a reified parameter.
Is there anyway I can get this to work?
fun <T: Any> getValue(key: String, defaultValue: T?): T {
return findPreferences(key, defaultValue)
}
This is the method that will return the value based on the key
@Suppress("unchecked_cast")
inline fun <reified T: Any> findPreferences(key: String, defaultValue: T?): T {
with(sharedPreferences) {
val result: Any = when(defaultValue) {
is Boolean -> getBoolean(key, default)
is Int -> getInt(key, defaultValue)
is Long -> getLong(key, defaultValue)
is Float -> getFloat(key, defaultValue)
is String -> getString(key, defaultValue)
else -> {
throw UnsupportedOperationException("Cannot find preference casting error")
}
}
return result as T
}
}
asked Jan 20 at 3:20
ant2009ant2009
674117320502
asked Jan 20 at 3:20
ant2009ant2009
674117320502
asked Jan 20 at 3:20
ant2009ant2009
674117320502
asked Jan 20 at 3:20
ant2009ant2009
674117320502
asked Jan 20 at 3:20
ant2009ant2009
674117320502
674117320502
add a comment |
add a comment |
1 Answer
1
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oldest
votes
Remove reified or change getValue to inline fun <reified T: Any> getValue....
With reified, we pass a type to this function(https://kotlinlang.org/docs/reference/inline-functions.html#reified-type-parameters). reified requires type to be known at compile time and obviously there is no enough type information in the getValue.
answered Jan 20 at 4:07
Dewey ReedDewey Reed
1,1401515
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Remove reified or change getValue to inline fun <reified T: Any> getValue....
With reified, we pass a type to this function(https://kotlinlang.org/docs/reference/inline-functions.html#reified-type-parameters). reified requires type to be known at compile time and obviously there is no enough type information in the getValue.
answered Jan 20 at 4:07
Dewey ReedDewey Reed
1,1401515
add a comment |
Remove reified or change getValue to inline fun <reified T: Any> getValue....
With reified, we pass a type to this function(https://kotlinlang.org/docs/reference/inline-functions.html#reified-type-parameters). reified requires type to be known at compile time and obviously there is no enough type information in the getValue.
answered Jan 20 at 4:07
Dewey ReedDewey Reed
1,1401515
add a comment |
Remove reified or change getValue to inline fun <reified T: Any> getValue....
With reified, we pass a type to this function(https://kotlinlang.org/docs/reference/inline-functions.html#reified-type-parameters). reified requires type to be known at compile time and obviously there is no enough type information in the getValue.
answered Jan 20 at 4:07
Dewey ReedDewey Reed
1,1401515
Remove reified or change getValue to inline fun <reified T: Any> getValue....
With reified, we pass a type to this function(https://kotlinlang.org/docs/reference/inline-functions.html#reified-type-parameters). reified requires type to be known at compile time and obviously there is no enough type information in the getValue.
answered Jan 20 at 4:07
Dewey ReedDewey Reed
1,1401515
answered Jan 20 at 4:07
Dewey ReedDewey Reed
1,1401515
answered Jan 20 at 4:07
Dewey ReedDewey Reed
1,1401515
answered Jan 20 at 4:07
Dewey ReedDewey Reed
1,1401515
1,1401515
add a comment |
add a comment |
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