Variable usage: better handling of pointer aliasing. Ticket: #1729
This commit is contained in:
Robert Reif
Daniel Marjamäki
parent
75f6ca5b66
commit
e86e8449f8
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@ -502,6 +502,65 @@ static bool isOp(const Token *tok)
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Token::Match(tok, "[+-*/%&!~|^,[])?:]")));
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}
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/**
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* @brief This class is used to capture the control flow within a function.
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*/
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class Scope
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{
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public:
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Scope() : _token(NULL), _parent(NULL) { }
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Scope(const Token *token, Scope *parent_) : _token(token), _parent(parent_) { }
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~Scope();
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Scope *parent()
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{
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return _parent;
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}
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Scope *addChild(const Token *token);
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void remove(Scope *scope);
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private:
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const Token *_token;
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Scope *_parent;
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std::list<Scope *> _children;
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};
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Scope::~Scope()
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{
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while (!_children.empty())
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{
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delete *_children.begin();
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_children.pop_front();
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}
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}
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Scope *Scope::addChild(const Token *token)
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{
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Scope *temp = new Scope(token, this);
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_children.push_back(temp);
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return temp;
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}
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void Scope::remove(Scope *scope)
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{
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std::list<Scope *>::iterator it;
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for (it = _children.begin(); it != _children.end(); ++it)
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{
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if (*it == scope)
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{
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delete *it;
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_children.erase(it);
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break;
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}
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}
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}
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/**
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* @brief This class is used create a list of variables within a function.
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*/
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class Variables
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{
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public:
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@ -513,11 +572,13 @@ public:
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public:
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VariableUsage(const Token *name = 0,
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VariableType type = standard,
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Scope *scope = NULL,
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bool read = false,
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bool write = false,
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bool modified = false) :
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_name(name),
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_type(type),
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_scope(scope),
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_read(read),
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_write(write),
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_modified(modified)
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@ -539,10 +600,12 @@ public:
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const Token *_name;
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VariableType _type;
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Scope *_scope;
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bool _read;
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bool _write;
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bool _modified; // read/modify/write
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std::set<unsigned int> _aliases;
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std::set<Scope *> _assignments;
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};
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typedef std::map<unsigned int, VariableUsage> VariableMap;
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@ -555,7 +618,7 @@ public:
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{
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return _varUsage;
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}
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void addVar(const Token *name, VariableType type, bool write_);
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void addVar(const Token *name, VariableType type, Scope *scope, bool write_);
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void read(unsigned int varid);
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void readAliases(unsigned int varid);
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void readAll(unsigned int varid);
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@ -673,10 +736,11 @@ void Variables::eraseAll(unsigned int varid)
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void Variables::addVar(const Token *name,
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VariableType type,
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Scope *scope,
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bool write_)
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{
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if (name->varId() > 0)
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_varUsage.insert(std::make_pair(name->varId(), VariableUsage(name, type, false, write_, false)));
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_varUsage.insert(std::make_pair(name->varId(), VariableUsage(name, type, scope, false, write_, false)));
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}
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void Variables::read(unsigned int varid)
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@ -822,7 +886,7 @@ Variables::VariableUsage *Variables::find(unsigned int varid)
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return 0;
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}
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static int doAssignment(Variables &variables, const Token *tok, bool dereference)
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static int doAssignment(Variables &variables, const Token *tok, bool dereference, Scope *scope)
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{
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int next = 0;
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@ -941,6 +1005,49 @@ static int doAssignment(Variables &variables, const Token *tok, bool dereference
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{
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bool replace = true;
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// check if variable declared in same scope
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if (scope == var1->_scope)
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replace = true;
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// not in same scope as decelaration
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else
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{
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std::set<Scope *>::iterator assignment;
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// check for an assignment in this scope
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assignment = var1->_assignments.find(scope);
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// no other assignment in this scope
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if (assignment == var1->_assignments.end())
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{
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// nothing to replace
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if (var1->_assignments.empty())
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replace = false;
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// this variable has previous assignments
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else
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{
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/**
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* @todo determine if existing aliases should be replaced or merged
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*/
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replace = false;
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}
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}
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// assignment in this scope
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else
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{
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// replace when only one other assingnment
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if (var1->_assignments.size() == 1)
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replace = true;
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// otherwise, merge them
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else
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replace = false;
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}
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}
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variables.alias(varid1, varid2, replace);
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}
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else if (tok->tokAt(next + 1)->str() == "?")
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@ -968,11 +1075,37 @@ static int doAssignment(Variables &variables, const Token *tok, bool dereference
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{
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if (var1->_type == Variables::pointer && !dereference)
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{
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// aliased variables in a larger scope are not supported
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variables.clearAliases(varid1);
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// check if variable decelaration is in this scope
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if (var1->_scope == scope)
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variables.clearAliases(varid1);
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else
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{
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std::set<Scope *>::iterator assignment;
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// check for an assignment in this scope
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assignment = var1->_assignments.find(scope);
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// no other assignment in this scope
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if (assignment == var1->_assignments.end())
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{
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/**
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* @todo determine if existing aliases should be discarded
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*/
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}
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// this assignment replaces the last assignment in this scope
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else
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{
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// aliased variables in a larger scope are not supported
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// remove all aliases
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variables.clearAliases(varid1);
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}
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}
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}
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}
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}
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var1->_assignments.insert(scope);
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}
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// check for alias to struct member
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@ -1042,14 +1175,29 @@ void CheckOther::functionVariableUsage()
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// varId, usage {read, write, modified}
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Variables variables;
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// scopes
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Scope scopes;
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Scope *scope = &scopes;
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unsigned int indentlevel = 0;
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for (const Token *tok = tok1; tok; tok = tok->next())
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{
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if (tok->str() == "{")
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{
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// replace the head node when found
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if (indentlevel == 0)
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scopes = Scope(tok, NULL);
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// add the new scope
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else
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scope = scope->addChild(tok);
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++indentlevel;
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}
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else if (tok->str() == "}")
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{
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--indentlevel;
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scope = scope->parent();
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if (indentlevel == 0)
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break;
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}
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@ -1079,7 +1227,7 @@ void CheckOther::functionVariableUsage()
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if (tok->str() == "static")
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tok = tok->next();
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variables.addVar(tok->next(), Variables::standard,
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variables.addVar(tok->next(), Variables::standard, scope,
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tok->tokAt(2)->str() == "=" ||
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tok->previous()->str() == "static");
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tok = tok->next();
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@ -1095,7 +1243,7 @@ void CheckOther::functionVariableUsage()
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if (tok->str() == "static")
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tok = tok->next();
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variables.addVar(tok->next(), Variables::standard, true);
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variables.addVar(tok->next(), Variables::standard, scope, true);
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// check if a local variable is used to initialize this variable
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if (tok->tokAt(3)->varId() > 0)
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@ -1113,7 +1261,7 @@ void CheckOther::functionVariableUsage()
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if (tok->str() == "static")
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tok = tok->next();
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variables.addVar(tok->tokAt(1), Variables::array,
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variables.addVar(tok->tokAt(1), Variables::array, scope,
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tok->tokAt(5)->str() == "=" || tok->str() == "static");
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// check for reading array size from local variable
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@ -1163,13 +1311,13 @@ void CheckOther::functionVariableUsage()
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bool written = tok->tokAt(3)->str() == "=";
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variables.addVar(tok->tokAt(2), type, written || isStatic);
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variables.addVar(tok->tokAt(2), type, scope, written || isStatic);
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int offset = 0;
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// check for assignment
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if (written)
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offset = doAssignment(variables, tok->tokAt(2), false);
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offset = doAssignment(variables, tok->tokAt(2), false, scope);
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tok = tok->tokAt(2 + offset);
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}
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@ -1196,13 +1344,13 @@ void CheckOther::functionVariableUsage()
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{
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bool written = tok->tokAt(4)->str() == "=";
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variables.addVar(tok->tokAt(3), Variables::pointerPointer, written || isStatic);
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variables.addVar(tok->tokAt(3), Variables::pointerPointer, scope, written || isStatic);
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int offset = 0;
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// check for assignment
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if (written)
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offset = doAssignment(variables, tok->tokAt(3), false);
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offset = doAssignment(variables, tok->tokAt(3), false, scope);
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tok = tok->tokAt(3 + offset);
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}
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@ -1233,13 +1381,13 @@ void CheckOther::functionVariableUsage()
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const bool written = tok->strAt(4) == "=";
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variables.addVar(tok->tokAt(3), type, written || isStatic);
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variables.addVar(tok->tokAt(3), type, scope, written || isStatic);
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int offset = 0;
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// check for assignment
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if (written)
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offset = doAssignment(variables, tok->tokAt(3), false);
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offset = doAssignment(variables, tok->tokAt(3), false, scope);
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tok = tok->tokAt(3 + offset);
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}
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@ -1270,7 +1418,7 @@ void CheckOther::functionVariableUsage()
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if (Token::Match(tok->tokAt(4), "%var%"))
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varid = tok->tokAt(4)->varId();
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variables.addVar(tok->tokAt(2), type, true);
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variables.addVar(tok->tokAt(2), type, scope, true);
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// check if a local variable is used to initialize this variable
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if (varid > 0)
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@ -1315,7 +1463,7 @@ void CheckOther::functionVariableUsage()
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if (tok->str() != "return")
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{
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variables.addVar(tok->tokAt(2),
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tok->next()->str() == "*" ? Variables::pointerArray : Variables::referenceArray,
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tok->next()->str() == "*" ? Variables::pointerArray : Variables::referenceArray, scope,
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tok->tokAt(6)->str() == "=" || isStatic);
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// check for reading array size from local variable
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@ -1344,7 +1492,7 @@ void CheckOther::functionVariableUsage()
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tok = tok->next();
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variables.addVar(tok->tokAt(3),
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tok->tokAt(2)->str() == "*" ? Variables::pointerArray : Variables::referenceArray,
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tok->tokAt(2)->str() == "*" ? Variables::pointerArray : Variables::referenceArray, scope,
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tok->tokAt(7)->str() == "=" || isStatic);
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// check for reading array size from local variable
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@ -1385,7 +1533,7 @@ void CheckOther::functionVariableUsage()
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unsigned int varid1 = tok->varId();
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const Token *start = tok;
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tok = tok->tokAt(doAssignment(variables, tok, dereference));
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tok = tok->tokAt(doAssignment(variables, tok, dereference, scope));
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if (pre || post)
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variables.use(varid1);
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@ -1406,20 +1554,6 @@ void CheckOther::functionVariableUsage()
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}
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else
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variables.write(varid1);
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// pointer alias
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if (var &&
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var->_type == Variables::pointer &&
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Token::Match(tok->previous(), "= %var% ;"))
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{
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const unsigned int varid2 = tok->varId();
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Variables::VariableUsage *var2 = variables.find(varid2);
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if (var2 && var2->_type == Variables::array)
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{
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variables.read(varid2);
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variables.write(varid2);
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}
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}
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}
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const Token *equal = tok->next();
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@ -78,6 +78,7 @@ private:
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TEST_CASE(localvaralias5); // ticket #1647
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TEST_CASE(localvaralias6); // ticket #1729
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TEST_CASE(localvaralias7); // ticket #1732
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TEST_CASE(localvaralias8);
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TEST_CASE(localvarasm);
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TEST_CASE(localvarstatic);
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@ -1260,7 +1261,8 @@ private:
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" int a[10];\n"
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" int *b = a;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n", errout.str());
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ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: a\n"
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"[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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@ -1376,8 +1378,7 @@ private:
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" int *b = a;\n"
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" *b = 0;\n"
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"}\n");
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TODO_ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
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ASSERT_EQUALS("", errout.str());
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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@ -1532,8 +1533,7 @@ private:
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" int *c = b;\n"
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" *c = 0;\n"
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"}\n");
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TODO_ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
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ASSERT_EQUALS("", errout.str());
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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@ -1543,10 +1543,9 @@ private:
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" int *d = b;\n"
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" *d = 0;\n"
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"}\n");
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TODO_ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: a\n"
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"[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n"
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"[test.cpp:5]: (style) Variable 'c' is assigned a value that is never used\n", errout.str());
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ASSERT_EQUALS("[test.cpp:5]: (style) Variable 'c' is assigned a value that is never used\n", errout.str());
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ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: a\n"
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"[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n"
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"[test.cpp:5]: (style) Variable 'c' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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@ -1556,9 +1555,8 @@ private:
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" c = b;\n"
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" *c = 0;\n"
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"}\n");
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TODO_ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: a\n"
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"[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n", errout.str());
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ASSERT_EQUALS("", errout.str());
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ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: a\n"
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"[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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@ -1570,9 +1568,8 @@ private:
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" c = a;\n"
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" *c = 0;\n"
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"}\n");
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TODO_ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n"
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"[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n", errout.str());
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ASSERT_EQUALS("", errout.str());
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n"
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"[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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@ -1679,8 +1676,8 @@ private:
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" d = c;\n"
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" *d = 0;\n"
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"}\n");
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TODO_ASSERT_EQUALS("[test.cpp:5]: (style) Variable 'c' is assigned a value that is never used\n", errout.str());
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ASSERT_EQUALS("", errout.str());
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ASSERT_EQUALS("[test.cpp:4]: (style) Unused variable: b\n"
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"[test.cpp:5]: (style) Variable 'c' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("int a[10];\n"
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"void foo()\n"
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|
|
@ -1692,9 +1689,8 @@ private:
|
|||
" d = a; *d = 0;\n"
|
||||
" d = c; *d = 0;\n"
|
||||
"}\n");
|
||||
TODO_ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n"
|
||||
"[test.cpp:5]: (style) Variable 'c' is assigned a value that is never used\n", errout.str());
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n"
|
||||
"[test.cpp:5]: (style) Variable 'c' is assigned a value that is never used\n", errout.str());
|
||||
}
|
||||
|
||||
void localvaralias2() // ticket 1637
|
||||
|
|
@ -1820,7 +1816,7 @@ private:
|
|||
" }\n"
|
||||
" b(srcdata);\n"
|
||||
"}");
|
||||
TODO_ASSERT_EQUALS(std::string("[test.cpp:3]: (style) Variable 'buf' is assigned a value that is never used\n"), errout.str());
|
||||
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'buf' is assigned a value that is never used\n", errout.str());
|
||||
|
||||
functionVariableUsage("void foo()\n"
|
||||
"{\n"
|
||||
|
|
@ -1833,7 +1829,7 @@ private:
|
|||
" srcdata = vdata;\n"
|
||||
" b(srcdata);\n"
|
||||
"}");
|
||||
TODO_ASSERT_EQUALS(std::string("[test.cpp:3]: (style) Variable 'buf' is assigned a value that is never used\n"), errout.str());
|
||||
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'buf' is assigned a value that is never used\n", errout.str());
|
||||
|
||||
functionVariableUsage("void foo()\n"
|
||||
"{\n"
|
||||
|
|
@ -1845,7 +1841,7 @@ private:
|
|||
" srcdata = vdata;\n"
|
||||
" b(srcdata);\n"
|
||||
"}");
|
||||
TODO_ASSERT_EQUALS(std::string("[test.cpp:3]: (style) Unused variable: buf\n"), errout.str());
|
||||
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: buf\n", errout.str());
|
||||
|
||||
functionVariableUsage("void foo()\n"
|
||||
"{\n"
|
||||
|
|
@ -1857,7 +1853,7 @@ private:
|
|||
" srcdata = buf;\n"
|
||||
" b(srcdata);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS(std::string(""), errout.str());
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
functionVariableUsage("void foo()\n"
|
||||
"{\n"
|
||||
|
|
@ -1886,7 +1882,7 @@ private:
|
|||
" }\n"
|
||||
" b(srcdata);\n"
|
||||
"}");
|
||||
TODO_ASSERT_EQUALS(std::string("[test.cpp:3]: (style) Variable 'buf' is assigned a value that is never used\n"), errout.str());
|
||||
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'buf' is assigned a value that is never used\n", errout.str());
|
||||
|
||||
functionVariableUsage("void foo()\n"
|
||||
"{\n"
|
||||
|
|
@ -1900,7 +1896,7 @@ private:
|
|||
" srcdata = vdata;\n"
|
||||
" b(srcdata);\n"
|
||||
"}");
|
||||
TODO_ASSERT_EQUALS(std::string("[test.cpp:3]: (style) Variable 'buf' is assigned a value that is never used\n"), errout.str());
|
||||
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'buf' is assigned a value that is never used\n", errout.str());
|
||||
|
||||
functionVariableUsage("void foo()\n"
|
||||
"{\n"
|
||||
|
|
@ -1913,7 +1909,7 @@ private:
|
|||
" srcdata = vdata;\n"
|
||||
" b(srcdata);\n"
|
||||
"}");
|
||||
TODO_ASSERT_EQUALS(std::string("[test.cpp:3]: (style) Unused variable: buf\n"), errout.str());
|
||||
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: buf\n", errout.str());
|
||||
|
||||
functionVariableUsage("void foo()\n"
|
||||
"{\n"
|
||||
|
|
@ -1926,7 +1922,7 @@ private:
|
|||
" srcdata = buf;\n"
|
||||
" b(srcdata);\n"
|
||||
"}");
|
||||
TODO_ASSERT_EQUALS(std::string("[test.cpp:5]: (style) Unused variable: vdata\n"), errout.str());
|
||||
ASSERT_EQUALS("[test.cpp:5]: (style) Unused variable: vdata\n", errout.str());
|
||||
}
|
||||
|
||||
void localvaralias7() // ticket 1732
|
||||
|
|
@ -1941,6 +1937,192 @@ private:
|
|||
ASSERT_EQUALS("", errout.str());
|
||||
}
|
||||
|
||||
void localvaralias8()
|
||||
{
|
||||
functionVariableUsage("void foo()\n"
|
||||
"{\n"
|
||||
" char b1[8];\n"
|
||||
" char b2[8];\n"
|
||||
" char b3[8];\n"
|
||||
" char b4[8];\n"
|
||||
" char *pb;\n"
|
||||
" if (a == 1)\n"
|
||||
" pb = b1;\n"
|
||||
" else if (a == 2)\n"
|
||||
" pb = b2;\n"
|
||||
" else if (a == 3)\n"
|
||||
" pb = b3;\n"
|
||||
" else\n"
|
||||
" pb = b4;\n"
|
||||
" b(pb);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
functionVariableUsage("void foo()\n"
|
||||
"{\n"
|
||||
" char b1[8];\n"
|
||||
" char b2[8];\n"
|
||||
" char b3[8];\n"
|
||||
" char b4[8];\n"
|
||||
" char *pb;\n"
|
||||
" if (a == 1)\n"
|
||||
" pb = b1;\n"
|
||||
" else if (a == 2)\n"
|
||||
" pb = b2;\n"
|
||||
" else if (a == 3)\n"
|
||||
" pb = b3;\n"
|
||||
" else {\n"
|
||||
" pb = b1;\n"
|
||||
" pb = b4;\n"
|
||||
" }\n"
|
||||
" b(pb);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
functionVariableUsage("void foo()\n"
|
||||
"{\n"
|
||||
" char b1[8];\n"
|
||||
" char b2[8];\n"
|
||||
" char b3[8];\n"
|
||||
" char b4[8];\n"
|
||||
" char *pb;\n"
|
||||
" if (a == 1)\n"
|
||||
" pb = b1;\n"
|
||||
" else if (a == 2)\n"
|
||||
" pb = b2;\n"
|
||||
" else if (a == 3)\n"
|
||||
" pb = b3;\n"
|
||||
" else {\n"
|
||||
" pb = b1;\n"
|
||||
" pb = b2;\n"
|
||||
" pb = b3;\n"
|
||||
" pb = b4;\n"
|
||||
" }\n"
|
||||
" b(pb);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
|
||||
functionVariableUsage("void foo()\n"
|
||||
"{\n"
|
||||
" char b1[8];\n"
|
||||
" char b2[8];\n"
|
||||
" char b3[8];\n"
|
||||
" char b4[8];\n"
|
||||
" char *pb;\n"
|
||||
" if (a == 1)\n"
|
||||
" pb = b1;\n"
|
||||
" else if (a == 2)\n"
|
||||
" pb = b2;\n"
|
||||
" else if (a == 3)\n"
|
||||
" pb = b3;\n"
|
||||
" pb = b4;\n"
|
||||
" b(pb);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: b1\n"
|
||||
"[test.cpp:4]: (style) Unused variable: b2\n"
|
||||
"[test.cpp:5]: (style) Unused variable: b3\n", errout.str());
|
||||
|
||||
functionVariableUsage("void foo()\n"
|
||||
"{\n"
|
||||
" char b1[8];\n"
|
||||
" char b2[8];\n"
|
||||
" char b3[8];\n"
|
||||
" char b4[8];\n"
|
||||
" char *pb;\n"
|
||||
" if (a == 1)\n"
|
||||
" pb = b1;\n"
|
||||
" else {\n"
|
||||
" if (a == 2)\n"
|
||||
" pb = b2;\n"
|
||||
" else {\n"
|
||||
" if (a == 3)\n"
|
||||
" pb = b3;\n"
|
||||
" else\n"
|
||||
" pb = b4;\n"
|
||||
" }\n"
|
||||
" }\n"
|
||||
" b(pb);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
functionVariableUsage("void foo()\n"
|
||||
"{\n"
|
||||
" char b1[8];\n"
|
||||
" char b2[8];\n"
|
||||
" char b3[8];\n"
|
||||
" char b4[8];\n"
|
||||
" char *pb;\n"
|
||||
" if (a == 1)\n"
|
||||
" pb = b1;\n"
|
||||
" else {\n"
|
||||
" if (a == 2)\n"
|
||||
" pb = b2;\n"
|
||||
" else {\n"
|
||||
" if (a == 3)\n"
|
||||
" pb = b3;\n"
|
||||
" else {\n"
|
||||
" pb = b1;\n"
|
||||
" pb = b4;\n"
|
||||
" }\n"
|
||||
" }\n"
|
||||
" }\n"
|
||||
" b(pb);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
functionVariableUsage("void foo()\n"
|
||||
"{\n"
|
||||
" char b1[8];\n"
|
||||
" char b2[8];\n"
|
||||
" char b3[8];\n"
|
||||
" char b4[8];\n"
|
||||
" char *pb;\n"
|
||||
" if (a == 1)\n"
|
||||
" pb = b1;\n"
|
||||
" else {\n"
|
||||
" if (a == 2)\n"
|
||||
" pb = b2;\n"
|
||||
" else {\n"
|
||||
" if (a == 3)\n"
|
||||
" pb = b3;\n"
|
||||
" else {\n"
|
||||
" pb = b1;\n"
|
||||
" pb = b2;\n"
|
||||
" pb = b3;\n"
|
||||
" pb = b4;\n"
|
||||
" }\n"
|
||||
" }\n"
|
||||
" }\n"
|
||||
" b(pb);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
functionVariableUsage("void foo()\n"
|
||||
"{\n"
|
||||
" char b1[8];\n"
|
||||
" char b2[8];\n"
|
||||
" char b3[8];\n"
|
||||
" char b4[8];\n"
|
||||
" char *pb;\n"
|
||||
" if (a == 1)\n"
|
||||
" pb = b1;\n"
|
||||
" else {\n"
|
||||
" if (a == 2)\n"
|
||||
" pb = b2;\n"
|
||||
" else {\n"
|
||||
" if (a == 3)\n"
|
||||
" pb = b3;\n"
|
||||
" }\n"
|
||||
" }\n"
|
||||
" pb = b4;\n"
|
||||
" b(pb);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: b1\n"
|
||||
"[test.cpp:4]: (style) Unused variable: b2\n"
|
||||
"[test.cpp:5]: (style) Unused variable: b3\n", errout.str());
|
||||
}
|
||||
|
||||
void localvarasm()
|
||||
{
|
||||
functionVariableUsage("void foo(int &b)\n"
|
||||
|
|
|
|||
Loading…
Reference in New Issue