Changeset 54e41b3 for src/AST/Node.hpp

Timestamp:

May 16, 2019, 1:46:28 PM (5 years ago)

Author:

Aaron Moss <a3moss@…>

Branches:

ADT, arm-eh, ast-experimental, cleanup-dtors, enum, forall-pointer-decay, jacob/cs343-translation, jenkins-sandbox, master, new-ast, new-ast-unique-expr, pthread-emulation, qualifiedEnum

Children:

24afc53

Parents:

89c2f7c9

Message:

Add first half of ast::Expr subclasses

File:

• src/AST/Node.hpp (modified) (3 diffs)

src/AST/Node.hpp

@@ -76 +76 @@
 // problems and be able to use auto return
 template<typename node_t>
-auto mutate(const node_t * node) {
+auto mutate( const node_t * node ) {
         assertf(
                 node->strong_count >= 1,
@@ -92 +92 @@
 }
 
-std::ostream& operator<< ( std::ostream& out, const Node* node );
+std::ostream& operator<< ( std::ostream& out, const Node * node );
 
 /// Base class for the smart pointer types
@@ -137 +137 @@
         operator const node_t * () const { return node; }
 
+        /// wrapper for convenient access to dynamic_cast
         template<typename o_node_t>
         const o_node_t * as() const { return dynamic_cast<const o_node_t *>(node); }
+
+        /// Sets this pointer to a mutated version of a pointer (possibly) owned elsehere.
+        /// Returns a mutable version of the pointer in this node.
+        node_t * set_and_mutate( const node_t * n ) {
+                // ensure ownership of `n` by this node to avoid spurious single-owner mutates
+                assign( n );
+                // get mutable version of `n`
+                auto r = mutate( node ); 
+                // re-assign mutable version in case `mutate()` produced a new pointer
+                assign( r );
+                return r;
+        }
 
         using ptr = const node_t *;