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