I am trying to learn to build a simple compiler as a hobby. I am targeting the Java virtual machine.
I have this formula: negationExpr : NEGATION^* atom ; atom : \'a\'..\'z\' | \'A\'..\'Z\'; With grammer rules above, if I input formula ¬¬a, I wo开发者_运维技巧uld get this tree structure:
If I got a grammar rule like a: A (C|D|E) I can create AST for the rule by attaching rewrite rules for each alternative(C, D, E) like this:
I am currently creating a more or less simple expression evaluator using ANTLR. My grammar is straightforward (at least i hope so) and looks like this:
I am creating a translator from my language into many (all?) other object oriented languages.As part of the language I want to support being able to insert target language code sections into the file.
I downloaded the latest version of ANTLR (AntlrWorks 1.4.2 with ANTLR 3.3). I started the AntlrWorks UI, and entered the sample expression evaluator grammar. Next I generated code from the AntlrWork
I have a small custom scripting language, and I am trying to update it to allow boolean expressions such as a > 2 and a > 2 and (b < 3 or c > 5).It\'s the parenthetical expressions that I
I have a language which basically is meant to map columns to a new structure in an array. The language is meant for product managers to define mappings without having to know a lot of programming deta
I\'ve been trying to learn ANTLR for some time and finally got my hand开发者_运维问答s on The Definitive ANTLR reference.
consider following extract of my grammar: definition :\'(\' \'define\' ( \'(\' variable def_formals \')\' body \')\'
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