1 files changed, 99 insertions, 0 deletions
diff --git a/syrette_macros/src/libs/intertrait_macros/args.rs b/syrette_macros/src/libs/intertrait_macros/args.rs
new file mode 100644
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--- /dev/null
+++ b/syrette_macros/src/libs/intertrait_macros/args.rs
@@ -0,0 +1,99 @@
+/**
+ * Originally from Intertrait by CodeChain
+ *
+ * https://github.com/CodeChain-io/intertrait
+ * https://crates.io/crates/intertrait/0.2.2
+ *
+ * Licensed under either of
+ *
+ * Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
+ * MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
+
+ * at your option.
+*/
+use std::collections::HashSet;
+
+use syn::bracketed;
+use syn::parse::{Parse, ParseStream, Result};
+use syn::punctuated::Punctuated;
+use syn::{Error, Ident, Path, Token, Type};
+
+#[derive(Hash, PartialEq, Eq)]
+pub enum Flag
+{
+    Sync,
+}
+
+impl Flag
+{
+    fn from(ident: &Ident) -> Result<Self>
+    {
+        match ident.to_string().as_str() {
+            "sync" => Ok(Flag::Sync),
+            unknown => {
+                let msg = format!("Unknown flag: {}", unknown);
+                Err(Error::new_spanned(ident, msg))
+            }
+        }
+    }
+}
+
+pub struct Targets
+{
+    pub flags: HashSet<Flag>,
+    pub paths: Vec<Path>,
+}
+
+impl Parse for Targets
+{
+    fn parse(input: ParseStream) -> Result<Self>
+    {
+        let mut flags = HashSet::new();
+        let mut paths = Vec::new();
+
+        if input.is_empty() {
+            return Ok(Targets { flags, paths });
+        }
+
+        if input.peek(syn::token::Bracket) {
+            let content;
+            bracketed!(content in input);
+            for ident in Punctuated::<Ident, Token![,]>::parse_terminated(&content)? {
+                if !flags.insert(Flag::from(&ident)?) {
+                    let msg = format!("Duplicated flag: {}", ident);
+                    return Err(Error::new_spanned(ident, msg));
+                }
+            }
+        }
+
+        if input.is_empty() {
+            return Ok(Targets { flags, paths });
+        }
+
+        paths = Punctuated::<Path, Token![,]>::parse_terminated(input)?
+            .into_iter()
+            .collect();
+
+        Ok(Targets { flags, paths })
+    }
+}
+
+pub struct Casts
+{
+    pub ty: Type,
+    pub targets: Targets,
+}
+
+impl Parse for Casts
+{
+    fn parse(input: ParseStream) -> Result<Self>
+    {
+        let ty: Type = input.parse()?;
+        input.parse::<Token![=>]>()?;
+
+        Ok(Casts {
+            ty,
+            targets: input.parse()?,
+        })
+    }
+}