cl-parser: Sync error::Parsing with cl-ast

compiler/cl-parser/src/error.rs

@@ -44,14 +44,18 @@ impl From<LexError> for ErrorKind {
 /// Compactly represents the stage of parsing an [Error] originated in
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub enum Parsing {
+    Mutability,
+    Visibility,
+    Identifier,
+    Literal,
+
     File,
 
     Attrs,
     Meta,
+    MetaKind,
 
     Item,
-    Visibility,
-    Mutability,
     ItemKind,
     Alias,
     Const,
@@ -78,6 +82,9 @@ pub enum Parsing {
     TyRef,
     TyFn,
 
+    Path,
+    PathPart,
+
     Stmt,
     StmtKind,
     Let,
@@ -95,10 +102,6 @@ pub enum Parsing {
     Fielder,
     Call,
     Member,
-    PathExpr,
-    PathPart,
-    Identifier,
-    Literal,
     Array,
     ArrayRep,
     AddrOf,
@@ -145,14 +148,17 @@ impl Display for ErrorKind {
 impl Display for Parsing {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
+            Parsing::Visibility => "a visibility qualifier",
+            Parsing::Mutability => "a mutability qualifier",
+            Parsing::Identifier => "an identifier",
+            Parsing::Literal => "a literal",
+
             Parsing::File => "a file",
 
             Parsing::Attrs => "an attribute-set",
             Parsing::Meta => "an attribute",
-
+            Parsing::MetaKind => "an attribute's arguments",
             Parsing::Item => "an item",
-            Parsing::Visibility => "a visibility qualifier",
-            Parsing::Mutability => "a mutability qualifier",
             Parsing::ItemKind => "an item",
             Parsing::Alias => "a type alias",
             Parsing::Const => "a const item",
@@ -179,6 +185,9 @@ impl Display for Parsing {
             Parsing::TyRef => "a reference type",
             Parsing::TyFn => "a function pointer type",
 
+            Parsing::Path => "a path",
+            Parsing::PathPart => "a path component",
+            
             Parsing::Stmt => "a statement",
             Parsing::StmtKind => "a statement",
             Parsing::Let => "a local variable declaration",
@@ -196,10 +205,6 @@ impl Display for Parsing {
             Parsing::Fielder => "a struct field expression",
             Parsing::Call => "a call expression",
             Parsing::Member => "a member access expression",
-            Parsing::PathExpr => "a path",
-            Parsing::PathPart => "a path component",
-            Parsing::Identifier => "an identifier",
-            Parsing::Literal => "a literal",
             Parsing::Array => "an array",
             Parsing::ArrayRep => "an array of form [k;N]",
             Parsing::AddrOf => "a borrow op",

compiler/cl-parser/src/parser.rs

@@ -208,7 +208,7 @@ impl<'t> Parser<'t> {
     /// [Path] = `::` *RelativePath*? | *RelativePath* \
     /// *RelativePath* = [PathPart] (`::` [PathPart])*
     pub fn path(&mut self) -> PResult<Path> {
-        const PARSING: Parsing = Parsing::PathExpr;
+        const PARSING: Parsing = Parsing::Path;
         let absolute = self.match_op(Punct::ColonColon, PARSING).is_ok();
         let mut parts = vec![];
 
@@ -221,7 +221,7 @@ impl<'t> Parser<'t> {
             parts.push(self.path_part()?)
         };
 
-        while self.match_op(Punct::ColonColon, Parsing::PathExpr).is_ok() {
+        while self.match_op(Punct::ColonColon, Parsing::Path).is_ok() {
             parts.push(self.path_part()?)
         }
 
@@ -598,7 +598,7 @@ impl<'t> Parser<'t> {
             Ok(ImplKind::Trait { impl_trait, for_type: self.ty()?.into() })
         } else {
             Err(Error {
-                reason: ExpectedParsing { want: { Parsing::PathExpr } },
+                reason: ExpectedParsing { want: Parsing::Path },
                 while_parsing: PARSING,
                 loc: target.extents.head,
             })?
@@ -925,7 +925,7 @@ impl<'t> Parser<'t> {
     /// Parses an expression beginning with a [Path] (i.e. [Path] or [Structor])
     pub fn exprkind_pathlike(&mut self) -> PResult<ExprKind> {
         let head = self.path()?;
-        Ok(match self.match_op(Punct::Colon, Parsing::PathExpr) {
+        Ok(match self.match_op(Punct::Colon, Parsing::Path) {
             Ok(_) => ExprKind::Structor(self.structor_body(head)?),
             Err(_) => ExprKind::Path(head),
         })