impl fmt::Display for Atom

3 files changed, 256 insertions, 2 deletions

diff --git a/src/atom/mod.rs b/src/atom/mod.rs
index 645281b..4ff9039 100644
--- a/src/atom/mod.rs
+++ b/src/atom/mod.rs
@@ -1,8 +1,14 @@
-use core::option::Option;
+use core::{
+    fmt::{self, write},
+    option::Option,
+};
 
 use crate::useflag::UseFlag;
+
 use get::Get;
 
+use itertools::Itertools;
+
 pub mod parsers;
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
@@ -105,3 +111,243 @@ pub struct Atom {
     slot: Option<Slot>,
     usedeps: Vec<UseDep>,
 }
+
+impl fmt::Display for Blocker {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Weak => write!(f, "!"),
+            Self::Strong => write!(f, "!!"),
+        }
+    }
+}
+
+impl fmt::Display for VersionOperator {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Lt => write!(f, "<"),
+            Self::Gt => write!(f, ">"),
+            Self::Eq => write!(f, "="),
+            Self::LtEq => write!(f, "<="),
+            Self::GtEq => write!(f, ">="),
+            Self::Roughly => write!(f, "~"),
+        }
+    }
+}
+
+impl fmt::Display for Category {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+impl fmt::Display for Name {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+impl fmt::Display for VersionNumber {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+impl fmt::Display for VersionSuffixKind {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Alpha => write!(f, "alpha"),
+            Self::Beta => write!(f, "beta"),
+            Self::Pre => write!(f, "pre"),
+            Self::Rc => write!(f, "rc"),
+            Self::P => write!(f, "p"),
+        }
+    }
+}
+
+impl fmt::Display for VersionSuffix {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.kind)?;
+
+        if let Some(number) = self.number.as_ref() {
+            write!(f, "{number}")?;
+        }
+
+        Ok(())
+    }
+}
+
+impl fmt::Display for Version {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let numbers = self
+            .numbers
+            .iter()
+            .map(|n| n.get().as_str())
+            .intersperse(".")
+            .collect::<String>();
+
+        let suffixes = self
+            .suffixes
+            .iter()
+            .map(|s| s.to_string())
+            .intersperse("_".to_string())
+            .collect::<String>();
+
+        write!(f, "{}", numbers)?;
+
+        if let Some(letter) = self.letter {
+            write!(f, "{letter}")?;
+        }
+
+        if suffixes.len() > 0 {
+            write!(f, "_{}", suffixes)?;
+        }
+
+        if let Some(rev) = self.rev.as_ref() {
+            write!(f, "-r{rev}")?;
+        }
+
+        Ok(())
+    }
+}
+
+impl fmt::Display for SlotOperator {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Eq => write!(f, "="),
+            Self::Star => write!(f, "*"),
+        }
+    }
+}
+
+impl fmt::Display for SlotName {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+impl fmt::Display for Slot {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        if let Some(slot) = self.slot.as_ref() {
+            write!(f, "{slot}")?;
+        }
+
+        if let Some(sub) = self.sub.as_ref() {
+            write!(f, "/{sub}")?;
+        }
+
+        if let Some(operator) = self.operator.as_ref() {
+            write!(f, "{operator}")?;
+        }
+
+        Ok(())
+    }
+}
+
+impl fmt::Display for UseDepNegate {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Minus => write!(f, "-"),
+            Self::Exclamation => write!(f, "!"),
+        }
+    }
+}
+
+impl fmt::Display for UseDepSign {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Enabled => write!(f, "(+)"),
+            Self::Disabled => write!(f, "(-)"),
+        }
+    }
+}
+
+impl fmt::Display for UseDepCondition {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Eq => write!(f, "="),
+            Self::Question => write!(f, "?"),
+        }
+    }
+}
+
+impl fmt::Display for UseDep {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        if let Some(negate) = self.negate.as_ref() {
+            write!(f, "{negate}")?;
+        }
+
+        write!(f, "{}", self.flag)?;
+
+        if let Some(sign) = self.sign.as_ref() {
+            write!(f, "{sign}")?;
+        }
+
+        if let Some(condition) = self.condition.as_ref() {
+            write!(f, "{condition}")?;
+        }
+
+        Ok(())
+    }
+}
+
+impl fmt::Display for Atom {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        if let Some(blocker) = self.blocker.as_ref() {
+            write!(f, "{blocker}")?;
+        }
+
+        if let Some(version_operator) = self.version_operator.as_ref() {
+            write!(f, "{version_operator}")?;
+        }
+
+        write!(f, "{}", self.category)?;
+        write!(f, "/")?;
+        write!(f, "{}", self.name)?;
+
+        if let Some(version) = self.version.as_ref() {
+            write!(f, "-{version}")?;
+        }
+
+        if let Some(slot) = self.slot.as_ref() {
+            write!(f, ":{slot}")?;
+        }
+
+        let usedeps = self
+            .usedeps
+            .iter()
+            .map(|u| u.to_string())
+            .intersperse(",".to_string())
+            .collect::<String>();
+
+        if !usedeps.is_empty() {
+            write!(f, "[{usedeps}]")?;
+        }
+
+        Ok(())
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use mon::{Parser, input::InputIter};
+
+    use crate::atom::parsers;
+
+    #[test]
+    fn test_version_display() {
+        let s = "1.0.0_alpha1_beta1-r1";
+        let version = parsers::version()
+            .parse_finished(InputIter::new(s))
+            .unwrap();
+
+        assert_eq!(version.to_string().as_str(), s);
+    }
+
+    #[test]
+    fn test_display_atom() {
+        let s = "!!>=foo/bar-1.0.0v_alpha1_beta1-r1:slot/sub=[a,b,c]";
+        let atom = parsers::atom().parse_finished(InputIter::new(s)).unwrap();
+
+        assert_eq!(atom.to_string().as_str(), s);
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index 2dbc8ca..4a1364e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,5 @@
 #![deny(clippy::pedantic)]
-#![allow(dead_code)]
+#![allow(dead_code, unstable_name_collisions)]
 
 pub mod atom;
 pub mod depend;
diff --git a/src/useflag/mod.rs b/src/useflag/mod.rs
index 3bf929a..2e7819a 100644
--- a/src/useflag/mod.rs
+++ b/src/useflag/mod.rs
@@ -1,3 +1,5 @@
+use core::fmt;
+
 pub mod parsers;
 
 #[derive(Clone, Debug, PartialEq, Eq)]
@@ -8,3 +10,9 @@ impl UseFlag {
         self.0.as_str()
     }
 }
+
+impl fmt::Display for UseFlag {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}