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Metaprogramming allows programmers to write programs that write other programs, freeing up time and increasing flexibility. Metalanguage is the language used in metaprogramming, while object language is the language of the programs created. Metaprogramming works through dynamic execution, program transformation systems, and Lisp language evaluation. Other languages can also use this process with an interpreter or domain-specific programming languages.
Metaprogramming is the process of writing computer programs that, in turn, write other programs. The metaprogramming process allows greater flexibility for computer programmers because the work usually done during the runtime period is allocated to the compile period. This process frees up the programmer’s time to focus on other tasks because it reduces the time it takes to manually code a program. Recompiling is unnecessary because metaprogramming allows programs to deal with new situations more efficiently. “Metalanguage” is the term given to the computer language used by the metaprogram.
Object language is the computer language of those programs written by the metaprogramming process. Reflexivity is a term given to metalanguage, which can also lead to metaprogramming. Metaprogramming works in various ways. One way is for the application programming interface to allow programming code access within the runtime engine.
Another way metaprogramming works is by allowing programs to write other programs through the process of dynamic execution. In this case, string expressions are used in this process. While the same language may be used in these two processes, it is not uncommon for languages to favor one process over the other.
Metaprogramming also works by bypassing language. It allows the alteration of languages through program transformation systems. This procedure gives metaprogramming the freedom to use languages even if the language does not employ any metaprogramming features.
You don’t need a source code for metaprogramming. It can be done by an incremental build or by runtime modifiable programs. The computer language Lisp is the preferred language for the metaprogramming process. This is due to the simplicity of this type of computer language and its power.
Metaprogramming using the Lisp language works by allowing evaluation of code during the program definition period, as opposed to the runtime period. This process makes the metaprogramming language and the host programming language the same. When this occurs, these Lisp routines can be recycled for the metaprogramming process.
Other languages have used this exact process with the integration of a program interpreter. This interpreter works with the data in the program. Domain-specific programming languages in metaprogramming are another form that creates parsers and lexical analyzers. These allow the user to use regular expressions to define the language.
