Function evalCodeExpr

go/engine/expr/expression.go:112–128

evalCodeExpr handles non-string expressions (arithmetic, comparison, boolean).

(expression string, targetType workflow.DataType, refs []Value)

		result[plIdx] = result[plIdx].Cast(targetType)
		expression = expression[:loc[0]] + "${}" + expression[loc[1]:]
	}
	return expression, result
}

// evalCodeExpr handles non-string expressions (arithmetic, comparison, boolean).
func evalCodeExpr(expression string, targetType workflowapi.DataType, refs []Value) (Value, error) {
	expression, refs = applyCastsInCode(expression, refs)

	if expression == "${}" && len(refs) == 1 {
		return refs[0].Cast(targetType), nil
	}

	idx := 0
	resolved := placeholderRE.ReplaceAllStringFunc(expression, func(_ string) string {
		v := refs[idx]
		idx++
		return valueToLiteral(v)
	})
	resolved = strings.TrimSpace(resolved)