/
join.go
40 lines (30 loc) · 1.13 KB
/
join.go
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package macros
import (
. "github.com/kocircuit/kocircuit/lang/circuit/eval"
. "github.com/kocircuit/kocircuit/lang/circuit/model"
. "github.com/kocircuit/kocircuit/lang/go/eval"
. "github.com/kocircuit/kocircuit/lang/go/eval/symbol"
. "github.com/kocircuit/kocircuit/lang/go/kit/util"
)
func init() {
RegisterEvalMacro("", new(EvalJoinMacro))
}
type EvalJoinMacro struct{}
func (m EvalJoinMacro) MacroID() string { return m.Help() }
func (m EvalJoinMacro) Label() string { return "join" }
func (m EvalJoinMacro) MacroSheathString() *string { return PtrString("Join") }
func (m EvalJoinMacro) Help() string { return "Join" }
func (m EvalJoinMacro) Doc() string {
return `Join returns its argument if called with a default (unnamed argument).
Otherwise Join returns a structure containing the named arguments passed to it.`
}
func (EvalJoinMacro) Invoke(span *Span, arg Arg) (returns Return, effect Effect, err error) {
return Construct(arg.(*StructSymbol)), nil, nil
}
func Construct(a *StructSymbol) Symbol {
if monadic, hasMonadic := a.GetMonadic(); hasMonadic {
return monadic
} else {
return FilterEmptyStructFields(a)
}
}