Parse macro-expanded statements like ordinary statements.

Author: jseyfried

src/libsyntax/ext/tt/macro_rules.rs

@@ -118,12 +118,18 @@ impl<'a> MacResult for ParserAnyMacro<'a> {
 
     fn make_stmts(self: Box<ParserAnyMacro<'a>>)
                  -> Option<SmallVector<ast::Stmt>> {
+        let parse_stmt = |parser: &mut Parser<'a>| -> ::parse::PResult<'a, _> {
+            Ok(match parser.parse_stmt()? {
+                Some(stmt) => Some(parser.finish_parsing_statement(stmt)?),
+                None => None,
+            })
+        };
         let mut ret = SmallVector::zero();
         loop {
             let mut parser = self.parser.borrow_mut();
             match parser.token {
                 token::Eof => break,
-                _ => match parser.parse_stmt() {
+                _ => match parse_stmt(&mut parser) {
                     Ok(maybe_stmt) => match maybe_stmt {
                         Some(stmt) => ret.push(stmt),
                         None => (),

src/libsyntax/parse/parser.rs

@@ -4064,7 +4064,7 @@ impl<'a> Parser<'a> {
 
     /// Finish parsing expressions that start with macros and handle trailing semicolons
     /// (or the lack thereof) -- c.f. `parse_stmt`.
-    fn finish_parsing_statement(&mut self, mut stmt: Stmt) -> PResult<'a, Stmt> {
+    pub fn finish_parsing_statement(&mut self, mut stmt: Stmt) -> PResult<'a, Stmt> {
         if let StmtKind::Mac(mac) = stmt.node {
             if mac.1 != MacStmtStyle::NoBraces || self.token == token::Semi {
                 stmt.node = StmtKind::Mac(mac);
@@ -4082,7 +4082,7 @@ impl<'a> Parser<'a> {
 
     fn handle_trailing_semicolon(&mut self, mut stmt: Stmt) -> PResult<'a, Stmt> {
         match stmt.node {
-            StmtKind::Expr(ref expr) => {
+            StmtKind::Expr(ref expr) if self.token != token::Eof => {
                 // expression without semicolon
                 if classify::expr_requires_semi_to_be_stmt(expr) {
                     // Just check for errors and recover; do not eat semicolon yet.