Quote: add type safety to Dylan macros by assigning nonterminal result types to metamorph parameters

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The Dylan language has taken the full step … [p. 37] structure via a user defined grammar, permitting the introduction of … We want to combine this great definition flexibility … we associate to every user defined nonterminal a … defined by the user defined nonterminals is always … A parameter [of a metamorph] may now also be of … is described by the metamorph nonterminal M, and … [p. 38] [The code is compact, for example] The file bach.wigmac is only 400 …   Google-1   Google-2

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Quote: using typed metamorphs, define a new language in 400 lines; including parser and code generator

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