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Tracking bound syntax pattern variables with syntax-parse
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Georges Dupéron ad27231d00 Support #:properties on all four of (quasi)template(/loc), instead of just template.
2017-01-28 05:16:57 +01:00
case Modified syntax-case & friends to use with-pvars. Closes 181 current-pvars: use in syntax-case, with-syntax, define/with-syntax, is there any with-parse? 2017-01-28 05:16:48 +01:00
parse Support #:properties on all four of (quasi)template(/loc), instead of just template. 2017-01-28 05:16:57 +01:00
scribblings Support #:properties on all four of (quasi)template(/loc), instead of just template. 2017-01-28 05:16:57 +01:00
test Partially reverted previous commit. 2017-01-28 05:16:51 +01:00
.gitignore Added package files 2017-01-28 05:16:16 +01:00
.travis.yml Skip build on versions < 6.8, as they use a different internal representation in syntax/parse, and we want to share the same structs to have some compatibility between syntax/parse and stxparse-info/parse 2017-01-28 05:16:52 +01:00
case.rkt Modified syntax-case & friends to use with-pvars. Closes 181 current-pvars: use in syntax-case, with-syntax, define/with-syntax, is there any with-parse? 2017-01-28 05:16:48 +01:00
current-pvars.rkt Support #:properties on all four of (quasi)template(/loc), instead of just template. 2017-01-28 05:16:57 +01:00
info.rkt Skip build on versions < 6.8, as they use a different internal representation in syntax/parse, and we want to share the same structs to have some compatibility between syntax/parse and stxparse-info/parse 2017-01-28 05:16:52 +01:00
LICENSE Imported files from 28f1df4cff 2017-01-28 05:16:11 +01:00
LICENSE.txt Added package files 2017-01-28 05:16:16 +01:00
main.rkt Fixed docs for (define-pvars (pvar ...)), should be (define-pvars pvar ...) 2017-01-28 05:16:54 +01:00
parse.rkt Failed attempt at making metafunctions from syntax/parse/experimental/template and stxparse-info/parse/experimental/template compatible. I can manage to extract the binding from syntax/parse/…, but it seems to recognize a different struct (e.g. as if they were struct instances from two different phases) 2017-01-28 05:16:50 +01:00
README.md Bugfix: with-pvars must be called after binding the pvar, not before. 2017-01-28 05:16:38 +01:00

README.md

stxparse-info

The module stxparse-info/parse is a patched version of syntax/parse which tracks which syntax pattern variables are bound. This allows some libraries to change the way syntax pattern variables work.

For example, phc-graph/subtemplate automatically derives temporary identifiers when a template contains yᵢ …, and xᵢ is a pattern variable. To know from which varᵢ the yᵢ … identifiers must be derived, phc-graph/subtemplate needs to know which syntax pattern variables are within scope.

To use this package, simply require stxparse-info/pares instead of syntax/parse Additionally, it is possible to use the for-syntax function (current-pvars) from stxparse-info/current-pvars to access the list of currently-bound pattern variables, and the macro (with-pvars (pvar ...) . body) can be used to add new pattern variables to the list.