35 lines
722 B
Go
35 lines
722 B
Go
// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
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// All rights reserved.
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// operand-expr.go
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package expr
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import (
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"fmt"
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"git.portale-stac.it/go-pkg/expr/kern"
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)
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// -------- expr term
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func newExprTerm(root *term) *term {
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tk := NewValueToken(root.tk.row, root.tk.col, SymExpression, root.Source(), root)
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return &term{
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tk: *tk,
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parent: nil,
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children: nil,
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position: posLeaf,
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priority: priValue,
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evalFunc: evalExpr,
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}
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}
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// -------- eval expr
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func evalExpr(ctx kern.ExprContext, opTerm *term) (v any, err error) {
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if ast, ok := opTerm.value().(*term); ok {
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v, err = ast.Compute(ctx)
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} else {
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err = fmt.Errorf("expression expected, got %T", opTerm.value())
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}
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return
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}
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