注意，不需要单独的主函数，代码也不使用任何链接库：作为Boost一部分的unit _ test . hpp头文件中包含所需的所有定义。
Notice that no separate main function is needed, nor does the code use any link library: the unit_test.hpp header that's part of the Boost installation contains all the necessary definitions.
给出了机理模型与工艺流程符号图动态链接的两种方式：动态链接库热链接和变量连接，并提供了变量定义初步功能。
Two methods of dynamic link between the process mechanism models and the graphs are given, which are DLL hot interlink and variant linkage, and elementary function of variant definition is provided.
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