remove-parameter-not-found

Id

@azure-tools/typespec-client-generator-core/remove-parameter-not-found

Severity: error

This diagnostic is issued when removeParameter is called with a selector that does not match any parameter on the operation.

Impact

• Area: Client customization transformations. Blocks removeParameter from producing the intended customized signature because the selector does not match an operation parameter.
• Not affected: The original operation parameter list is unchanged.

❌ Incorrect Usage

@service
namespace MyService {
  op myOp(existingParam?: string): void;
}

alias Modified = removeParameter(MyService.myOp, "missingParam"); // `missingParam` is not a parameter of `myOp`

Diagnostic Message

TCGC reports:

Parameter "missingParam" not found in operation "myOp".

✅ How to Fix

Use the exact name or model property reference for an existing operation parameter.

@service
namespace MyService {
  op myOp(existingParam?: string): void;
}

alias Modified = removeParameter(MyService.myOp, "existingParam");