impl IUseFlag type

src/useflag/mod.rs

@@ -1,10 +1,18 @@
 use core::fmt;
 
+use get::Get;
+
 pub mod parsers;
 
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub struct UseFlag(String);
 
+#[derive(Clone, Debug, PartialEq, Eq, Get)]
+pub struct IUseFlag {
+    default: bool,
+    flag: UseFlag,
+}
+
 impl UseFlag {
     pub fn get(&self) -> &str {
         self.0.as_str()

src/useflag/parsers.rs

@@ -1,6 +1,6 @@
-use mon::{Parser, r#if};
+use mon::{Parser, r#if, tag};
 
-use crate::useflag::UseFlag;
+use crate::useflag::{IUseFlag, UseFlag};
 
 pub fn useflag<'a>() -> impl Parser<&'a str, Output = UseFlag> {
     let start = r#if(|c: &char| c.is_ascii_alphanumeric());
@@ -11,3 +11,16 @@ pub fn useflag<'a>() -> impl Parser<&'a str, Output = UseFlag> {
         .recognize()
         .map(|output: &str| UseFlag(output.to_string()))
 }
+
+pub fn iuseflag<'a>() -> impl Parser<&'a str, Output = IUseFlag> {
+    useflag()
+        .preceded_by(tag("+"))
+        .map(|flag| IUseFlag {
+            default: true,
+            flag,
+        })
+        .or(useflag().map(|flag| IUseFlag {
+            default: false,
+            flag,
+        }))
+}