c75807dec9
Function typeAssert() now returns the concrete value of interface{}
object defined in the runtime.
What is missing is actual type checking against provided type, and
support for the variant returning 2 values, the concrete value and
boolean status.
20 lines
293 B
Go
20 lines
293 B
Go
package main
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import "context"
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func get(ctx context.Context, k string) string {
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var r string
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if v := ctx.Value(k); v != nil {
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r = v.(string)
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}
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return r
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}
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func main() {
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ctx := context.WithValue(context.Background(), "hello", "world")
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println(get(ctx, "hello"))
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}
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// Output:
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// world
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