[TxMt] Composable grammars
doob at me.com
Wed Apr 6 20:14:46 UTC 2016
I've been working for quite a while with trying to rewrite the grammar
for the D bundle to be more accurate to the official grammar. The
grammar for D is quite complex, that in the combination with the syntax
for grammars in TextMate doesn't allow any good ways to reuse or compose
rules making it very difficult to describe a grammar. I know it's
possible to reuse rules with the repository, but that seems to be mostly
useful when matching with "begin" and "end".
For example, this is the grammar for a function declaration from the
official D grammar:
StorageClasses(opt) BasicType FuncDeclarator FunctionBody
StorageClasses Identifier FuncDeclaratorSuffix FunctionBody
BasicType2(opt) Identifier FuncDeclaratorSuffix
TemplateParameters Parameters MemberFunctionAttributes(opt)
Each of these parts/rules of the grammar consists of several other
rules, many levels deep.
It would be really nice if the TextMate grammar syntax allowed, somehow,
to define rules, or parts of a rule, which the other rules can be
composed of, similar to above.
Or is there a way to already do something similar with the current syntax?
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