TXL is a special-purpose programming language originally designed by Charles Halpern-Hamu and James Cordy at the University of Toronto in 1985. The acronym "TXL" originally stood for "Turing eXtender Language" after the language's original purpose, the specification and rapid prototyping of variants and extensions of the Turing programming language, but no longer has any meaningful interpretation. Modern TXL is specifically designed for creating, manipulating and rapidly prototyping language-based descriptions, tools and applications using source transformation. It is a hybrid functional / rule-based language using first order functional programming at the higher level and term rewriting at the lower level. The formal semantics and implementation of TXL are based on formal term rewriting, but the term structures are largely hidden from the user due to the example-like style of pattern specification. More information...
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