| 摘要 |
PURPOSE:To smoothly execute a program even when reference to a variable name is performed without setting the value of the variable name, by providing a detecting means for the variable name whose value is unsettled, and referring to only an output list on which only the variable names whose values are unsettled are outputted. CONSTITUTION:The detecting means 10 of the variable name whose value is unsettled performs a processing based on information, etc., which represents the presence/absence of an initial value set for a variable name token, and detects the variable name performing the reference without setting the value. Next, an output means 11 for the variable name whose value is unsettled outputs the variable name whose relationships with another program is required to be investigated on a list because the value detected by the means 10 is the variable name whose value is unsettled. Thus, the list of the variable name whose value is unsettled is outputted by compiling a source program, and only the output list on which only the variable names whose values are unsettled are outputted is referred. In such a way, in the program in which a constant is set as the variable name and the variable name is used in place of the constant, it is possible to execute the program by preventing an abnormal operation in a case where no constant is set from being generated, and to improve productivity and quality.
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