| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem on the difficulty in pattern matching operation on an arbitrary complicated data structure. SOLUTION: Whether a computer-storage expression matches a filter or not, is determined. A first code structure representing the expression for determining a value of the expression is evaluated, a second code structure representing the filter for determining the characteristics of the filter is analyzed, and the value is filtered according to the filter characteristics. The first code structure is constructed from a plurality of first programming language code structure elements, and the second code structure is constructed from a plurality of second programming language code structure elements. Each second structure element corresponds to one of the first structure elements. COPYRIGHT: (C)2003,JPO
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