Home >Backend Development >Golang >How Can I Return from a Parent Function in Go After a Child Function Executes?
Returning from a Child Function within a Parent Function
One may encounter a situation where they wish to return from a parent function upon calling a child function. In this scenario, the goal is to terminate execution in the parent function apiEndpoint() when a certain condition is met in the child function apiResponse().
The Issue
Using the provided code snippet:
func apiEndpoint() { if false { apiResponse("error") // Return execution in parent function // Skip execution of apiResponse("all good") } apiResponse("all good") } func apiResponse(message string) { // Returns message to user via JSON }
The intent is to have apiResponse("error") terminate the execution of apiEndpoint() so that apiResponse("all good") is not executed. However, the default behavior in Go is that a function cannot control execution flow outside of its scope.
Resolution
To achieve the desired outcome, there are several approaches:
1. Use if-Else Statements
If the condition is simple enough, the if-else structure can be used to avoid the explicit return statement:
func apiEndpoint() { if someCondition { apiResponse("error") } else { apiResponse("all good") } }
2. Return from Caller Using Values
If both functions return values, you can use a single line of code to return the appropriate value from the caller function:
func apiEndpoint() int { if someCondition { return apiResponse("error") } return apiResponse("all good") } func apiResponse(message string) int { return 1 // Return an int }
Note
While panicing is another exception that can halt execution, it is not considered a suitable solution in this context and should be reserved for exceptional situations.
The above is the detailed content of How Can I Return from a Parent Function in Go After a Child Function Executes?. For more information, please follow other related articles on the PHP Chinese website!