34 lines
662 B
Go
34 lines
662 B
Go
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// operand-func.go
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package expr
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// -------- function term
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func newFuncTerm(tk *Token, args []*term) *term {
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return &term{
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tk: *tk,
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class: classVar,
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kind: kindUnknown,
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parent: nil,
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children: args,
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position: posLeaf,
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priority: priValue,
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evalFunc: evalFunc,
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}
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}
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// -------- eval func
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func evalFunc(ctx exprContext, self *term) (v any, err error) {
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name, _ := self.tk.Value.(string)
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params := make([]any, len(self.children))
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for i, tree := range self.children {
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var param any
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if param, err = tree.compute(ctx); err != nil {
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break
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}
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params[i] = param
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}
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if err == nil {
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v, err = ctx.Call(name, params)
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}
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return
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}
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