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Invoking Package Functions Without Package Qualifiers in Go
In Go, importing packages allows access to their exported functions and types within the importing package. However, one may encounter scenarios where calling functions without using the package name is desirable.
Explicit Period Import
The Go specification provides a solution through the explicit period (.) import:
<code class="go">package main import . "fmt" // Import package without a name func main() { Println("Hey there") // Invoke fmt.Println without qualifier }</code>
While effective, the Go community generally discourages the use of explicit period imports, citing readability concerns.
Package-Level References
An alternative approach involves declaring package-level references using type aliases:
<code class="go">package main import "fmt" var Println = fmt.Println // Reference to fmt.Println as package-level variable type ScanState = fmt.ScanState // Type alias for fmt.ScanState func main() { Println("Hello, playground") // Invoke Println without qualifier }</code>
This method allows for explicit control over which functions and types are exported from the imported package.
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