Use lalrpop in a trivial way as a proof of concept. Mess with some Unicode character classes.

1 files changed, 16 insertions, 0 deletions

diff --git a/src/commandline.lalrpop b/src/commandline.lalrpop
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+grammar;
+
+//
+// Z is the unicode class for separators, including line, paragraph, and space
+// separators. C is the class for control characters. P is the class for
+// punctuation. This regexp tests for the intersection of the negation of these
+// character classes, which is any character NOT in one of these three classes.
+//
+// [1] is the official reference, and [2] is a site that is useful for browsing
+// to get an intuitive idea of what these classes mean.
+//
+// [1] http://www.unicode.org/reports/tr44/#General_Category_Values
+// [2] https://www.compart.com/en/unicode/category
+//
+pub Filename: String = <filename:r"[\P{Z}&&\P{C}&&\P{P}]+"> => filename.to_string();
+