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package validator
import (
"github.com/vektah/gqlparser/ast"
. "github.com/vektah/gqlparser/validator"
)
func init() {
AddRule("KnownDirectives", func(observers *Events, addError AddErrFunc) {
observers.OnDirective(func(walker *Walker, directive *ast.Directive) {
if directive.Definition == nil {
addError(
Message(`Unknown directive "%s".`, directive.Name),
At(directive.Position),
)
return
}
for _, loc := range directive.Definition.Locations {
if loc == directive.Location {
return
}
}
addError(
Message(`Directive "%s" may not be used on %s.`, directive.Name, directive.Location),
At(directive.Position),
)
})
})
}
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