source: src/SynTree/CompoundStmt.cc @ f7e749f

aaron-thesisarm-ehcleanup-dtorsdeferred_resndemanglerjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprnew-envno_listpersistent-indexerresolv-newwith_gc
Last change on this file since f7e749f was 23bb1b9, checked in by Rob Schluntz <rschlunt@…>, 5 years ago

refactor VarExprReplacer? and reuse it in TupleAssignExpr?

  • Property mode set to 100644
File size: 2.8 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// XXX.cc --
8//
9// Author           : Richard C. Bilson
10// Created On       : Mon May 18 07:44:20 2015
11// Last Modified By : Rob Schluntz
12// Last Modified On : Mon May 02 15:19:17 2016
13// Update Count     : 3
14//
15
16#include "Statement.h"
17#include "Common/utility.h"
18#include <algorithm>
19#include <functional>
20#include "Expression.h"
21#include "Declaration.h"
22#include "SynTree/VarExprReplacer.h"
23
24using std::string;
25using std::endl;
26
27CompoundStmt::CompoundStmt( std::list<Label> labels ) : Statement( labels ) {
28}
29
30CompoundStmt::CompoundStmt( const CompoundStmt &other ) : Statement( other ) {
31        cloneAll( other.kids, kids );
32
33        // when cloning a compound statement, we may end up cloning declarations which
34        // are referred to by VariableExprs throughout the block. Cloning a VariableExpr
35        // does a shallow copy, so the VariableExpr will end up pointing to the original
36        // declaration. If the original declaration is deleted, e.g. because the original
37        // CompoundStmt is deleted, then we have a dangling pointer. To avoid this case,
38        // find all DeclarationWithType nodes (since a VariableExpr must point to a
39        // DeclarationWithType) in the original CompoundStmt and map them to the cloned
40        // node in the new CompoundStmt ('this'), then replace the Declarations referred to
41        // by each VariableExpr according to the constructed map. Note that only the declarations
42        // in the current level are collected into the map, because child CompoundStmts will
43        // recursively execute this routine. There may be more efficient ways of doing
44        // this.
45        VarExprReplacer::DeclMap declMap;
46        std::list< Statement * >::const_iterator origit = other.kids.begin();
47        for ( Statement * s : kids ) {
48                assert( origit != other.kids.end() );
49                Statement * origStmt = *origit++;
50                if ( DeclStmt * declStmt = dynamic_cast< DeclStmt * >( s ) ) {
51                        DeclStmt * origDeclStmt = dynamic_cast< DeclStmt * >( origStmt );
52                        assert( origDeclStmt );
53                        if ( DeclarationWithType * dwt = dynamic_cast< DeclarationWithType * > ( declStmt->get_decl() ) ) {
54                                DeclarationWithType * origdwt = dynamic_cast< DeclarationWithType * > ( origDeclStmt->get_decl() );
55                                assert( origdwt );
56                                assert( dwt->get_name() == origdwt->get_name() );
57                                declMap[ origdwt ] = dwt;
58                        }
59                }
60        }
61        if ( ! declMap.empty() ) {
62                VarExprReplacer replacer( declMap );
63                accept( replacer );
64        }
65}
66
67CompoundStmt::~CompoundStmt() {
68        deleteAll( kids );
69}
70
71void CompoundStmt::print( std::ostream &os, int indent ) const {
72        os << "CompoundStmt" << endl ;
73        printAll( kids, os, indent + 2 );
74}
75
76// Local Variables: //
77// tab-width: 4 //
78// mode: c++ //
79// compile-command: "make install" //
80// End: //
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