source: src/SynTree/CompoundStmt.cc @ 930f69e

ADTaaron-thesisarm-ehast-experimentalcleanup-dtorsdeferred_resndemanglerenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprnew-envno_listpersistent-indexerpthread-emulationqualifiedEnumresolv-newwith_gc
Last change on this file since 930f69e was ea6332d, checked in by Thierry Delisle <tdelisle@…>, 7 years ago

Big header cleaning pass - commit 3

  • Property mode set to 100644
File size: 3.3 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 <cassert>                    // for assert, safe_dynamic_cast
17#include <list>                       // for list, _List_const_iterator, lis...
18#include <ostream>                    // for operator<<, ostream, basic_ostream
19#include <string>                     // for operator==, string
20
21#include "Common/utility.h"           // for cloneAll, deleteAll, printAll
22#include "Declaration.h"              // for DeclarationWithType, Declaration
23#include "Statement.h"                // for CompoundStmt, Statement, DeclStmt
24#include "SynTree/Label.h"            // for Label
25#include "SynTree/VarExprReplacer.h"  // for VarExprReplacer, VarExprReplace...
26
27using std::string;
28using std::endl;
29
30CompoundStmt::CompoundStmt( std::list<Label> labels ) : Statement( labels ) {
31}
32
33CompoundStmt::CompoundStmt( const CompoundStmt &other ) : Statement( other ) {
34        cloneAll( other.kids, kids );
35
36        // when cloning a compound statement, we may end up cloning declarations which
37        // are referred to by VariableExprs throughout the block. Cloning a VariableExpr
38        // does a shallow copy, so the VariableExpr will end up pointing to the original
39        // declaration. If the original declaration is deleted, e.g. because the original
40        // CompoundStmt is deleted, then we have a dangling pointer. To avoid this case,
41        // find all DeclarationWithType nodes (since a VariableExpr must point to a
42        // DeclarationWithType) in the original CompoundStmt and map them to the cloned
43        // node in the new CompoundStmt ('this'), then replace the Declarations referred to
44        // by each VariableExpr according to the constructed map. Note that only the declarations
45        // in the current level are collected into the map, because child CompoundStmts will
46        // recursively execute this routine. There may be more efficient ways of doing
47        // this.
48        VarExprReplacer::DeclMap declMap;
49        std::list< Statement * >::const_iterator origit = other.kids.begin();
50        for ( Statement * s : kids ) {
51                assert( origit != other.kids.end() );
52                Statement * origStmt = *origit++;
53                if ( DeclStmt * declStmt = dynamic_cast< DeclStmt * >( s ) ) {
54                        DeclStmt * origDeclStmt = safe_dynamic_cast< DeclStmt * >( origStmt );
55                        if ( DeclarationWithType * dwt = dynamic_cast< DeclarationWithType * > ( declStmt->get_decl() ) ) {
56                                DeclarationWithType * origdwt = safe_dynamic_cast< DeclarationWithType * > ( origDeclStmt->get_decl() );
57                                assert( dwt->get_name() == origdwt->get_name() );
58                                declMap[ origdwt ] = dwt;
59                        } else assert( ! dynamic_cast< DeclarationWithType * > ( origDeclStmt->get_decl() ) );
60                } else assert( ! dynamic_cast< DeclStmt * > ( s ) );
61        }
62        if ( ! declMap.empty() ) {
63                VarExprReplacer replacer( declMap );
64                accept( replacer );
65        }
66}
67
68CompoundStmt::~CompoundStmt() {
69        deleteAll( kids );
70}
71
72void CompoundStmt::print( std::ostream &os, int indent ) const {
73        os << "CompoundStmt" << endl ;
74        printAll( kids, os, indent + 2 );
75}
76
77// Local Variables: //
78// tab-width: 4 //
79// mode: c++ //
80// compile-command: "make install" //
81// End: //
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