/
stub.go
59 lines (53 loc) · 1.25 KB
/
stub.go
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package dynaml
import (
"github.com/mandelsoft/spiff/yaml"
"strings"
)
func (e CallExpr) stub(binding Binding) (interface{}, EvaluationInfo, bool) {
info := DefaultInfo()
var arg []string
switch len(e.Arguments) {
case 0:
arg = binding.Path()
case 1:
pushed := e.Arguments[0]
ref, ok := pushed.(ReferenceExpr)
if !ok {
resolved := true
val, info, ok := ResolveExpressionOrPushEvaluation(&pushed, &resolved, nil, binding, true)
if !resolved {
return e, info, true
}
if !ok {
return val, info, ok
} else {
switch v := val.(type) {
case string:
arg = PathComponents(v, true)
case []yaml.Node:
for _, n := range v {
str, ok := n.Value().(string)
if !ok {
return info.Error("stub() requires a string entries in list")
}
arg = append(arg, str)
}
default:
if !info.Undefined {
return info.Error("stub() requires a string or reference argument")
}
arg = binding.Path()
}
}
} else {
arg = ref.Path
}
default:
return info.Error("a maximum of one argument expected for 'stub'")
}
stub, ok := binding.FindInStubs(arg)
if !ok {
return info.Error("'%s' not found in any stub", strings.Join(arg, "."))
}
return stub.Value(), info, ok
}