transcompiler

A transcompiler, also known as a source-to-source compiler or transpiler, is a program that translates source code from one programming language to another. This is distinct from a traditional compiler, which translates source code into machine code or an intermediate representation that can be executed by a computer. Transpilers operate at a higher level of abstraction, converting code written in one high-level language to an equivalent program in another high-level language.

The primary motivation for using transcompilers is often to leverage features of a newer or more modern language while maintaining compatibility with older systems or environments. For example, a transcompiler might convert code written in a modern JavaScript dialect like TypeScript into standard JavaScript that can be understood by all web browsers. Similarly, some transcompilers enable the use of features from languages like C++ in environments that primarily support C.

Transpilation can facilitate code migration between languages, allow developers to use preferred languages for projects that require compatibility with different platforms, or enable the adoption of new language features without a complete rewrite. The process involves parsing the source code, analyzing its structure and meaning, and then generating equivalent code in the target language. While the output is human-readable source code, it may not always be as idiomatic or optimized as code written directly in the target language.