New plans for macros

About to move them completely to stdlib

orchid-extension/src/parser.rs

@@ -0,0 +1,24 @@
+use orchid_base::error::OrcRes;
+use orchid_base::parse::Snippet;
+
+use crate::atom::{AtomFactory, ForeignAtom};
+use crate::tree::GenTokTree;
+
+pub type GenSnippet<'a> = Snippet<'a, 'a, ForeignAtom<'a>, AtomFactory>;
+
+pub trait Parser: Send + Sync + Sized + Default + 'static {
+  const LINE_HEAD: &'static str;
+  fn parse(line: GenSnippet<'_>) -> OrcRes<Vec<GenTokTree<'_>>>;
+}
+
+pub trait DynParser: Send + Sync + 'static {
+  fn line_head(&self) -> &'static str;
+  fn parse<'a>(&self, line: GenSnippet<'a>) -> OrcRes<Vec<GenTokTree<'a>>>;
+}
+
+impl<T: Parser> DynParser for T {
+  fn line_head(&self) -> &'static str { Self::LINE_HEAD }
+  fn parse<'a>(&self, line: GenSnippet<'a>) -> OrcRes<Vec<GenTokTree<'a>>> { Self::parse(line) }
+}
+
+pub type ParserObj = &'static dyn DynParser;