# Using floating point literals with platform.CoreGraphics.CGFloat

**URL:** <https://discuss.kotlinlang.org/t/using-floating-point-literals-with-platform-coregraphics-cgfloat/23137>\
**Category:** Native\
**Created:** [October 6, 2021, 11:34pm UTC](https://discuss.kotlinlang.org/t/using-floating-point-literals-with-platform-coregraphics-cgfloat/23137 "2021-10-06T23:34:17Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![MattMur](https://avatars.discourse-cdn.com/v4/letter/m/ecb155/32.png) [@MattMur](https://discuss.kotlinlang.org/u/MattMur)\
**Post date:** [October 6, 2021, 11:34pm UTC](https://discuss.kotlinlang.org/t/using-floating-point-literals-with-platform-coregraphics-cgfloat/23137/1 "2021-10-06T23:34:17Z")

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I’m trying to use the `CGRectMake` API from platform.CoreGraphics within an `actual class` in my iosMain. It requires CGFloat instead of floating point literals(FPL). When I use FPLs I get the error: `the floating-point literal does not conform to the expected type CGFloat`.

The problem is that not only does there not seem to be a bridge between scalar types from Kotlin to ObjC, but also that there isn’t even a way to create a CGFloat value, since CGFloat (as defined in platform.CoreGraphics) does not have any constructors. Calling: `val x = CGFloat(5.0)` results in error: **Expected class CGFloat does not have default constructor**.

I’ve looked at [sample code here](https://github.com/JetBrains/kotlin/blob/7bedb6bca81be21ed17a6454132e76054521b2a3/kotlin-native/samples/uikit/src/iosMain/kotlin/ViewController.kt#L57), and I’m not sure how they’ve gotten it to work.

Is there something I’m missing in order to get Kotlin Float to play nice with CGFloat?

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**Author:** ![Artyom.Degtyarev](https://avatars.discourse-cdn.com/v4/letter/a/ad7895/32.png) [@Artyom.Degtyarev](https://discuss.kotlinlang.org/u/Artyom.Degtyarev)\
**Post date:** [October 7, 2021, 6:46am UTC](https://discuss.kotlinlang.org/t/using-floating-point-literals-with-platform-coregraphics-cgfloat/23137/2 "2021-10-07T06:46:22Z")

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Hello, @MattMur!  
Could you please share the code snippet? Also, how are you declaring the iOS target?

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<div class="post-metadata">

**Author:** ![MattMur](https://avatars.discourse-cdn.com/v4/letter/m/ecb155/32.png) [@MattMur](https://discuss.kotlinlang.org/u/MattMur)\
**Post date:** [October 7, 2021, 6:27pm UTC](https://discuss.kotlinlang.org/t/using-floating-point-literals-with-platform-coregraphics-cgfloat/23137/3 "2021-10-07T18:27:23Z")

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Sure! image attached as well.  
`val rect = CGRectMake(5.0, 14.0, 12.0, 23.1)`

 ![fpl](https://us1.discourse-cdn.com/flex019/uploads/kotlinlang/original/2X/b/ba371281bd673f497a718151432163c5d09c7d9e.png)

I am using `kotlin.mpp.enableGranularSourceSetsMetadata=true, kotlin.native.enableDependencyPropagation=false` and custom iOS targets since I need the arm32 architecture for my exported framework. I found that these settings allowed for this. I create the targets like this:

```auto
    val ios32 = iosArm32()
    val ios64 = iosArm64()
    val iosSim = iosX64()
    configure(listOf(ios32, ios64, iosSim)) {
        binaries.framework {
            baseName = "Core"
        }
    }

```

My iOS source set looks like this:

```auto
    val iosArm32Main by getting
    val iosArm64Main by getting
    val iosX64Main by getting
    val iosMain by creating {
        dependsOn(commonMain)
        iosArm32Main.dependsOn(this)
        iosArm64Main.dependsOn(this)
        iosX64Main.dependsOn(this)
        dependencies {
            implementation("io.ktor:ktor-client-ios:$ktorVersion")
        }
    }

```

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<div class="post-metadata">

**Author:** ![MattMur](https://avatars.discourse-cdn.com/v4/letter/m/ecb155/32.png) [@MattMur](https://discuss.kotlinlang.org/u/MattMur)\
**Post date:** [October 11, 2021, 7:40pm UTC](https://discuss.kotlinlang.org/t/using-floating-point-literals-with-platform-coregraphics-cgfloat/23137/4 "2021-10-11T19:40:16Z")

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@Artyom.Degtyarev Interestingly if I simply remove `iosArm32Main.dependsOn(this)` from my `iosMain` source set, everything works…

Obviously that shouldn’t be the solution, as I need this architecture slice. Is this a bug with KMM?

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<div class="post-metadata">

**Author:** ![Artyom.Degtyarev](https://avatars.discourse-cdn.com/v4/letter/a/ad7895/32.png) [@Artyom.Degtyarev](https://discuss.kotlinlang.org/u/Artyom.Degtyarev)\
**Post date:** [October 14, 2021, 8:42am UTC](https://discuss.kotlinlang.org/t/using-floating-point-literals-with-platform-coregraphics-cgfloat/23137/5 "2021-10-14T08:42:55Z")

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I’ve answered in the [https://youtrack.jetbrains.com/issue/KT-49232](https://youtrack.jetbrains.com/issue/KT-49232), sorry for a long silence.  
Just for the record: this is a Commonizer bug, as a workaround one should use separate source sets for 32- and 64-bit platforms. This does not affect the result frameworks(right now your Gradle script should generate several independent frameworks), and should not affect the ability to make an XCFramework or a far framework from them.