impl profile evaluation

src/repo/profile/parsers.rs

@@ -0,0 +1,35 @@
+use mon::{Parser, ParserIter, any, ascii_whitespace1, tag};
+
+use crate::{
+    Parseable,
+    repo::profile::{FlagOperation, LineBasedFileExpr},
+    useflag::UseFlag,
+};
+
+impl<'a, T> Parseable<'a, &'a str> for LineBasedFileExpr<T>
+where
+    T: Parseable<'a, &'a str>,
+{
+    type Parser = impl Parser<&'a str, Output = Self>;
+
+    fn parser() -> Self::Parser {
+        let comment = tag("#")
+            .preceded_by(ascii_whitespace1().opt())
+            .followed_by(any().and_not(tag("\n")).repeated().many())
+            .map(|_| LineBasedFileExpr::Comment);
+        let expr = T::parser().map(|expr| LineBasedFileExpr::Expr(expr));
+
+        comment.or(expr)
+    }
+}
+
+impl<'a> Parseable<'a, &'a str> for FlagOperation {
+    type Parser = impl Parser<&'a str, Output = Self>;
+
+    fn parser() -> Self::Parser {
+        UseFlag::parser()
+            .preceded_by(tag("-"))
+            .map(FlagOperation::Remove)
+            .or(UseFlag::parser().map(FlagOperation::Add))
+    }
+}