Shader input array not working

[cedricp]

Description of Issue

Error generated when a shader input is an array of bindings. Here's an sample with a PxrSwitch shader :

        def Shader "MASTER_SWITCH"
        {
            uniform token info:id = "PxrAttribute"
            color3f inputs:defaultColor = (0, 0, 0)
            float inputs:defaultFloat
            vector3f inputs:defaultFloat3 = (0, 0, 0)
            int inputs:defaultInt
            string inputs:type = "int"
            string inputs:varname = "dw_variation"
            int inputs:verbosity
            float outputs:resultF
        }
        def Shader "SPC_PxrSwitch"
        {
            uniform token info:id = "PxrSwitch"
            float inputs:index.connect = </Shading/Shaders/MASTER_SWITCH.outputs:resultF>
            color3f[] inputs:inputsRGB.connect = [
                </Shading/Shaders/SPC_Red.outputs:resultRGB>,
                </Shading/Shaders/SPC_Black.outputs:resultRGB>,
                </Shading/Shaders/SPC.outputs:resultRGB>,
            ]
            color3f outputs:resultRGB
       }

The returned error is :
Error in 'pxrInternal_v0_22__pxrReserved_::HdPrman_Xcpt::HandleXcpt' at line 44 in file /storage/sources/GIT/USD/third_party/renderman-24/plugin/hdPrman/xcpt.cpp : 'S20006 OSL: ConnectShaders: cannot connect a color (resultRGB) to a color[] (inputsRGB)_

Maybe I'm doing it wrong ?
Best regards

System Information (OS, Hardware)

Linux CentOS7 x86_64

Package Versions

dev branch

Build Flags

Standard

[jilliene]

Filed as internal issue #USD-7074

[FlorianZ]

@cedricp you're not doing anything wrong. This is supposed to work the way you wrote it. We need to complete an internal project to make this work, but currently don't have an ETA. We'll keep you posted if this changes.