syntax: Add a source field to `Local` for tracking if it comes from `let`s or `for`s.

2 files changed, 5 insertions, 1 deletions

diff --git a/src/libsyntax/ext/build.rs b/src/libsyntax/ext/build.rs
index 449feb3afbf..bb7b73c5f81 100644
--- a/src/libsyntax/ext/build.rs
+++ b/src/libsyntax/ext/build.rs
@@ -439,6 +439,7 @@ impl<'a> AstBuilder for ExtCtxt<'a> {
             init: Some(ex),
             id: ast::DUMMY_NODE_ID,
             span: sp,
+            source: ast::LocalLet,
         };
         let decl = respan(sp, ast::DeclLocal(local));
         @respan(sp, ast::StmtDecl(@decl, ast::DUMMY_NODE_ID))
@@ -462,6 +463,7 @@ impl<'a> AstBuilder for ExtCtxt<'a> {
             init: Some(ex),
             id: ast::DUMMY_NODE_ID,
             span: sp,
+            source: ast::LocalLet,
         };
         let decl = respan(sp, ast::DeclLocal(local));
         @respan(sp, ast::StmtDecl(@decl, ast::DUMMY_NODE_ID))
diff --git a/src/libsyntax/ext/expand.rs b/src/libsyntax/ext/expand.rs
index 6c6bf520104..762363f3abe 100644
--- a/src/libsyntax/ext/expand.rs
+++ b/src/libsyntax/ext/expand.rs
@@ -669,7 +669,8 @@ fn expand_non_macro_stmt(s: &Stmt, fld: &mut MacroExpander)
                         pat: pat,
                         init: init,
                         id: id,
-                        span: span
+                        span: span,
+                        source: source,
                     } = **local;
                     // expand the pat (it might contain exprs... #:(o)>
                     let expanded_pat = fld.fold_pat(pat);
@@ -703,6 +704,7 @@ fn expand_non_macro_stmt(s: &Stmt, fld: &mut MacroExpander)
                             init: new_init_opt,
                             id: id,
                             span: span,
+                            source: source
                         };
                     SmallVector::one(@Spanned {
                         node: StmtDecl(@Spanned {