选择开始触发
Start of selection triggered
我理解 START-OF-SELECTION
是在用户执行程序时触发的(在选择屏幕之后),但仍然缺少一些东西。
例子:
如果我有代码:
gv_var = 2.
INITIALIZATION.
gv_var = 1.
初始化代码会先执行,但是如果我有:
gv_var = 2.
START-OF-SELECTION.
gv_var = 1.
Start-of-selection不会是用户执行后最先执行的。
所以我的问题是:如果 START-OF-SELECTION
不是选择屏幕后执行的第一件事,那么它到底有什么意义?
难道只是为了让程序更易读吗?
您可能想刷新您对 Event Blocks in Executable Programs 的了解。 INITIALIZATION
比START-OF-SELECTION
早运行,甚至在选择画面显示之前。其他重要信息是
In an executable program, any non-declarative statements that occur
between the REPORT
or PROGRAM
statement and the first processing block
are also processed in the START-OF-SELECTION
block.
(描述 here)
我理解 START-OF-SELECTION
是在用户执行程序时触发的(在选择屏幕之后),但仍然缺少一些东西。
例子:
如果我有代码:
gv_var = 2.
INITIALIZATION.
gv_var = 1.
初始化代码会先执行,但是如果我有:
gv_var = 2.
START-OF-SELECTION.
gv_var = 1.
Start-of-selection不会是用户执行后最先执行的。
所以我的问题是:如果 START-OF-SELECTION
不是选择屏幕后执行的第一件事,那么它到底有什么意义?
难道只是为了让程序更易读吗?
您可能想刷新您对 Event Blocks in Executable Programs 的了解。 INITIALIZATION
比START-OF-SELECTION
早运行,甚至在选择画面显示之前。其他重要信息是
In an executable program, any non-declarative statements that occur between the
REPORT
orPROGRAM
statement and the first processing block are also processed in theSTART-OF-SELECTION
block.
(描述 here)