If you call println within a hot loop, this behavior may be the bottleneck of the loop. The println macro will lock the standard output on each call. Used to specify the file name of the output file. This macro uses the same syntax as format, but writes to the standard output instead. Only necessary if you set PrintToFile to True. Normally False, but you can set it to True if you want output to go to a disk file instead of the printer. The ranges are separated by commas and enclosed in quote marks, similar to how you specify page ranges in the Print dialog box. Rather than detail all of them, it is probably more useful to just look at some of the more common arguments you can use. When using the PrintOut method, there are quite a few different arguments you can use. In this particular usage, the Copies argument is used to specify how many copies of the document to print. The PrintOut method prints the specified document in this case, the ActiveDocument object-the document currently selected-is printed. To add this capability to your macros, simply include a line like this: If you find yourself with this need, you can simply let the macro take care of printing the current document. It is also not uncommon to need to print out the current document after doing some processing on it. It’s important to note that 'macro' is simply a label assigned to specific values or phrases and does not represent a memory location. Macros are defined using the define preprocessor directive and do not require a semicolon at the end. It is not uncommon to create macros that perform repetitive tasks, and thereby relieve us of the mundane tasks we might otherwise need to perform. In C, a macro is a piece of code that can be replaced with a macro value. The list entries could contain multiple arguments, but here only the name of the variable is used.Macros really can make life easier. This example defines a list of variables, and automatically generates their declarations and a function to print them out.įirst the list definition. The invocation of LIST expands X for each element in the list. Macros that make changes to a single cell can be applied to a range of cells by first selecting the full range and then activating the macro. Each expansion of LIST is preceded by a definition of X with the syntax for a list element. The list is defined by a macro or header file (named, LIST) which generates no code by itself, but merely consists of a sequence of invocations of a macro (classically named " X") with the elements' data. Expansion(s) of the list to generate fragments of declarations or statements.Implementation Īn X macro application consists of two parts: It remains useful in modern-day C and C++ programming languages, but remains relatively unknown. Usage of X macros dates back to the 1960s. They provide reliable maintenance of parallel lists whose corresponding items must be declared or executed in the same order.Įxamples of such lists particularly include initialization of arrays, in concert with declarations of enumeration constants and function prototypes generation of statement sequences and switch arms etc. They are most useful when at least some of the lists cannot be composed by indexing, such as compile time. X macros are an idiomatic usage of programming language macros for generating list-like structures of data or code.
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