Move binding type declarations to lefthand of callsite

README.md

@@ -187,7 +187,7 @@ suspend fun failsIn5ms(): Result<Int, DomainErrorA> { ... }
 suspend fun failsIn1ms(): Result<Int, DomainErrorB> { ... }
 
 runBlocking {
-    val result = binding<Int, BindingError> {
+    val result: Result<Int, BindingError> = binding {
         val x = async { failsIn5ms().bind() }
         val y = async { failsIn1ms().bind() }
         x.await() + y.await()

benchmarks/src/commonMain/kotlin/com/github/michaelbull/result/BindingBenchmark.kt

@@ -16,7 +16,7 @@ class BindingBenchmark {
 
     @Benchmark
     fun bindingSuccess(blackhole: Blackhole) {
-        val result = binding<Int, Error> {
+        val result: Result<Int, Error> = binding {
             val x = provideX().bind()
             val y = provideY().bind()
             x + y
@@ -27,7 +27,7 @@ class BindingBenchmark {
 
     @Benchmark
     fun bindingFailure(blackhole: Blackhole) {
-        val result = binding<Int, Error> {
+        val result: Result<Int, Error> = binding {
             val x = provideX().bind()
             val z = provideZ().bind()
             x + z

benchmarks/src/jvmMain/kotlin/com/github/michaelbull/result/SuspendBindingBenchmark.kt

@@ -42,27 +42,23 @@ class SuspendBindingBenchmark {
 
     private val time = 100L
 
-    private fun nonSuspend() = binding<Int, Error> {
+    private fun nonSuspend(): Result<Int, Error> = binding {
         val x = provideXBlocking().bind()
         val y = provideYBlocking().bind()
         x + y
     }
 
-    private suspend fun withSuspend(): Result<Int, Error> {
+    private suspend fun withSuspend(): Result<Int, Error> = coroutineBinding {
-        return coroutineBinding {
+        val x = provideX().bind()
-            val x = provideX().bind()
+        val y = provideY().bind()
-            val y = provideY().bind()
+        x + y
-            x + y
-        }
     }
 
-    private suspend fun withAsyncSuspend(): Result<Int, Error> {
+    private suspend fun withAsyncSuspend(): Result<Int, Error> = coroutineScope {
-        return coroutineScope {
+        coroutineBinding {
-            coroutineBinding {
+            val x = async { provideX().bind() }
-                val x = async { provideX().bind() }
+            val y = async { provideY().bind() }
-                val y = async { provideY().bind() }
+            x.await() + y.await()
-                x.await() + y.await()
-            }
         }
     }
 

kotlin-result-coroutines/src/commonTest/kotlin/com.github.michaelbull.result.coroutines/binding/SuspendableBindingTest.kt

@@ -28,7 +28,7 @@ class SuspendableBindingTest {
             return Ok(2)
         }
 
-        val result = binding<Int, BindingError> {
+        val result: Result<Int, BindingError> = binding {
             val x = provideX().bind()
             val y = provideY().bind()
             x + y
@@ -52,7 +52,7 @@ class SuspendableBindingTest {
             return Ok(x + 2)
         }
 
-        val result = binding<Int, BindingError> {
+        val result: Result<Int, BindingError> = binding {
             val x = provideX().bind()
             val y = provideY(x.toInt()).bind()
             y
@@ -81,7 +81,7 @@ class SuspendableBindingTest {
             return Ok(2)
         }
 
-        val result = binding<Int, BindingError> {
+        val result: Result<Int, BindingError> = binding {
             val x = provideX().bind()
             val y = provideY().bind()
             val z = provideZ().bind()
@@ -118,7 +118,7 @@ class SuspendableBindingTest {
             return Err(BindingError)
         }
 
-        val result = binding<Int, BindingError> {
+        val result: Result<Int, BindingError> = binding {
             val x = provideX().bind()
             val y = provideY().bind()
             val z = provideZ().bind()
@@ -152,7 +152,7 @@ class SuspendableBindingTest {
             return Ok(2)
         }
 
-        val result = binding<Int, BindingError> {
+        val result: Result<Int, BindingError> = binding {
             val x = provideX().bind()
             val y = provideY().bind()
             val z = provideZ().bind()

kotlin-result-coroutines/src/jvmTest/kotlin/com/github/michaelbull/result/coroutines/binding/AsyncSuspendableBindingTest.kt

@@ -34,7 +34,7 @@ class AsyncSuspendableBindingTest {
             return Ok(2)
         }
 
-        val result = binding<Int, BindingError> {
+        val result: Result<Int, BindingError> = binding {
             val x = async { provideX().bind() }
             val y = async { provideY().bind() }
             x.await() + y.await()
@@ -63,7 +63,7 @@ class AsyncSuspendableBindingTest {
             return Err(BindingError.BindingErrorB)
         }
 
-        val result = binding<Int, BindingError> {
+        val result: Result<Int, BindingError> = binding {
             val x = async { provideX().bind() }
             val y = async { provideY().bind() }
             val z = async { provideZ().bind() }
@@ -96,7 +96,7 @@ class AsyncSuspendableBindingTest {
         val dispatcherA = StandardTestDispatcher(testScheduler)
         val dispatcherB = StandardTestDispatcher(testScheduler)
 
-        val result = binding<Int, BindingError> {
+        val result: Result<Int, BindingError> = binding {
             val x = async(dispatcherA) { provideX().bind() }
             val y = async(dispatcherB) { provideY().bind() }
 
@@ -143,7 +143,7 @@ class AsyncSuspendableBindingTest {
         val dispatcherB = StandardTestDispatcher(testScheduler)
         val dispatcherC = StandardTestDispatcher(testScheduler)
 
-        val result = binding<Unit, BindingError> {
+        val result: Result<Unit, BindingError> = binding {
             launch(dispatcherA) { provideX().bind() }
 
             testScheduler.advanceTimeBy(20)

kotlin-result/src/commonTest/kotlin/com/github/michaelbull/result/BindingTest.kt

@@ -66,7 +66,7 @@ class BindingTest {
         fun provideY(): Result<String, BindingError> = Err(BindingError)
         fun provideZ(): Result<Int, BindingError> = Ok(2)
 
-        val result = binding<Int, BindingError> {
+        val result: Result<Int, BindingError> = binding {
             val x = provideX().bind()
             val y = provideY().bind()
             val z = provideZ().bind()