我正在查看一些PETS,例如代码。
#undef __FUNCT__
#define __FUNCT__ "main"
编号<>main>。
姓名 或者在每项职能(或仅是主要职能)面前,标准C方案拟订公约类似吗?
如果是,为什么这样做?
这似乎很短,或是支持<条码>标准的宏观的C编纂者的工作范围。
http://www.mcs.anl.gov/petsc/petsc-tant/src/snes/examples/tutorials/ex3.c.html“rel=“noreferer”>,载于PETSc源代码(>,$-PETSC_DIR}/src/examples/tutorials/ex3.c,第33-40条:
Note that immediately before each routine below, we define the macro
__FUNCT__to be a string containing the routine name. If defined, this macro is used in the PETSc error handlers to provide a complete traceback of routine names. All PETSc library routines use this macro, and users can optionally employ it as well in their application codes. Note that users can get a traceback of PETSc errors regardless of whether they define__FUNCT__in application codes; this macro merely provides the added traceback detail of the application routine names.
查阅petsc.h,似乎有一批大型汽车通过FUNCT__。 a. 作为职能参数,例如:
#define PetscFree(a) ((a) ? ((*PetscTrFree)((a),__LINE__,__FUNCT__,__FILE__,__SDIR__) || ((a = 0),0)) : 0)
我的猜测是,PetscTrFree()(etc.)将这些论点用于欺骗/log。
首先,使用<代码>#undef的汇编忽视了以前所有的__FUNCT__的申报,随后又将识别符号宣布为“main”号,并贴在#define __FUNCT__“main”上。
我从个人角度讲,没有人会把这种说法说成是“主人”,如果你想要使用图书馆或某种东西,但不想使用他们所宣称的职能名称,我不知道,为什么你会把这个身份变成一个识别特征,而不是仅仅创造另一个功能,而把你想要的东西称作另一个功能。
无论如何,我不认为这是一个积极的C方案拟订公约,而从有限的法典来看,这并不清楚它究竟是怎样使用,还是为什么使用。
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