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Statements.cpp
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Statements.cpp
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/*
* Created by Tyler Gearing 3/14/19
*
*/
#include "Statements.hpp"
#define RETURN "retVal"
// Statement
Statement::Statement() = default;
// Statements
Statements::Statements() = default;
void Statements::addStatement(std::unique_ptr<Statement> statement) {
_statements.push_back(std::move(statement));
}
void Statements::print() {
for (auto &s: _statements)
s->print();
}
void Statements::evaluate(SymTab &symTab, std::unique_ptr<FuncTab> &funcTab) {
for (auto &s: _statements) {
if(symTab.isDefinedGlobal(RETURN))
break;
s->evaluate(symTab, funcTab);
}
}
std::vector<std::unique_ptr<Statement>> &Statements::getStatements() {
return _statements;
}
// AssignmentStatement
AssignmentStatement::AssignmentStatement(): _lhsVariable{""},
_lhsExpression{nullptr},
_rhsExpression{nullptr} {}
AssignmentStatement::AssignmentStatement(std::string lhsVar,
std::unique_ptr<ExprNode> lhsExpr,
std::unique_ptr<ExprNode> rhsExpr):
_lhsVariable{std::move(lhsVar)}, _lhsExpression{std::move(lhsExpr)},
_rhsExpression{std::move(rhsExpr)} {}
void AssignmentStatement::evaluate(SymTab &symTab,
std::unique_ptr<FuncTab> &funcTab) {
if(_lhsExpression == nullptr) {
symTab.setValueFor(lhsVariable(),
rhsExpression()->evaluate(symTab, funcTab));
} else {
auto lhsindex = dynamic_cast<NumberDescriptor*>
(_lhsExpression->evaluate(symTab, funcTab).get());
if(lhsindex->type() != TypeDescriptor::INTEGER) {
std::cout << "AssignmentStatement::evaluate error index must be";
std::cout << " an integer\n";
exit(1);
}
int index = lhsindex->value.intValue;
auto lhs = symTab.getValueFor(lhsVariable());
auto rhs = _rhsExpression->evaluate(symTab, funcTab);
if(lhs->type() == TypeDescriptor::STRINGARRAY) {
if(rhs->type() != TypeDescriptor::STRING){
std::cout<<"array value not of compatible types"<<std::endl;
exit(1);
}
auto desc = dynamic_cast<StringDescriptor*>(rhs.get());
std::string val = desc->value;
dynamic_cast<StringArray*>(lhs.get())->setSubStr(index, val);
} else if(lhs->type() == TypeDescriptor::NUMBERARRAY) {
if(rhs->type() != TypeDescriptor::INTEGER){
std::cout<<"array value not of compatible types"<<std::endl;
exit(1);
}
auto desc = dynamic_cast<NumberDescriptor*>(rhs.get());
int val = desc->value.intValue;
dynamic_cast<NumberArray*>(lhs.get())->setSubNum(index, val);
}
}
}
std::string &AssignmentStatement::lhsVariable() {
return _lhsVariable;
}
std::unique_ptr<ExprNode> &AssignmentStatement::lhsExpression() {
return _lhsExpression;
}
std::unique_ptr<ExprNode> &AssignmentStatement::rhsExpression() {
return _rhsExpression;
}
void AssignmentStatement::print() {
std::cout << _lhsVariable << " = ";
_rhsExpression->print();
std::cout << std::endl;
}
// PrintStatement
PrintStatement::PrintStatement(): _rhsList{} {}
PrintStatement::PrintStatement(std::vector<std::shared_ptr<ExprNode>>exprList):
_rhsList{std::move(exprList)} {}
void PrintStatement::evaluate(SymTab &symTab, std::unique_ptr<FuncTab> &funcTab) {
for (auto &l: _rhsList ) {
printValue( l->evaluate(symTab, funcTab).get() );
std::cout << ' ';
}
std::cout << std::endl;
}
std::vector<std::shared_ptr<ExprNode>>&PrintStatement::rhsList() {
return _rhsList;
}
void PrintStatement::print() {
for (auto &l: _rhsList) {
l->print();
std::cout << std::endl;
}
}
// CallStatement
CallStatement::CallStatement(): _call{nullptr} {}
CallStatement::CallStatement(std::unique_ptr<ExprNode> call) :
_call{std::move(call)} {}
void CallStatement::evaluate(SymTab &symTab,
std::unique_ptr<FuncTab> &funcTab) {
_call->evaluate(symTab, funcTab);
}
std::unique_ptr<ExprNode> &CallStatement::call() {
return _call;
}
void CallStatement::print() {
_call->print();
}
// ReturnStatement
ReturnStatement::ReturnStatement(): _stmt{nullptr} {}
ReturnStatement::ReturnStatement(std::unique_ptr<ExprNode> stmt) :
_stmt{std::move(stmt)} {}
void ReturnStatement::evaluate(SymTab &symTab,
std::unique_ptr<FuncTab> &funcTab) {
symTab.setReturnValue(_stmt->evaluate(symTab, funcTab));
}
std::unique_ptr<ExprNode> &ReturnStatement::stmt() {
return _stmt;
}
void ReturnStatement::print() {
_stmt->print();
}
// ForStatement
ForStatement::ForStatement() : _statements{nullptr} {}
ForStatement::ForStatement(std::string id,
std::vector<std::shared_ptr<ExprNode>> range,
std::unique_ptr<Statements> stmnts):
_id{std::move(id)}, _range{std::move(range)},
_statements{std::move(stmnts)} {}
void ForStatement::evaluate(SymTab &symTab,
std::unique_ptr<FuncTab> &funcTab) {
std::unique_ptr<Range> range =
std::make_unique<Range>(getId(), getRange(), symTab, funcTab);
while( !range->atEnd() ) {
statements()->evaluate(symTab, funcTab);
symTab.increment( getId(), range->step() );
range->getNext();
}
}
std::unique_ptr<Statements>&ForStatement::statements() {
return _statements;
}
std::vector<std::shared_ptr<ExprNode>> &ForStatement::getRange() {
return _range;
}
std::string &ForStatement::getId() {
return _id;
}
void ForStatement::print() {
std::cout << _id << std::endl;
for(auto &n : _range)
n->print();
std::cout << std::endl;
_statements->print();
std::cout << std::endl;
}
// IfStatement
IfStatement::IfStatement() : _firstTest{nullptr}, _firstSuite{nullptr},
_elseSuite{nullptr} {}
IfStatement::IfStatement(std::unique_ptr<ExprNode>firstTest,
std::unique_ptr<Statements>firstSuite,
std::vector<std::unique_ptr<ExprNode>> elifTests,
std::vector<std::unique_ptr<Statements>> elifSuites,
std::unique_ptr<Statements>elseSuite):
_firstTest{std::move(firstTest)},
_firstSuite{std::move(firstSuite)},
_elifTests{std::move(elifTests)},
_elifSuites{std::move(elifSuites)},
_elseSuite{std::move(elseSuite)} {}
void IfStatement::evaluate(SymTab &symTab, std::unique_ptr<FuncTab> &funcTab) {
if(evaluateBool(firstTest()->evaluate(symTab, funcTab).get())) {
firstSuite()->evaluate(symTab, funcTab);
return;
} else if(_elifTests.size() != _elifSuites.size() ) {
std::cout << "IfStatement::evaluate mismatched elif and arguments\n";
exit(1);
} else if ( !_elifTests.empty() ) {
int i = 0;
for( auto &t: _elifTests ) {
if( evaluateBool( t->evaluate(symTab, funcTab).get() ) ) {
_elifSuites[i]->evaluate(symTab, funcTab);
return;
}
++i;
}
} else if( _elseSuite != nullptr )
_elseSuite->evaluate(symTab, funcTab);
}
std::unique_ptr<ExprNode> &IfStatement::firstTest() {
return _firstTest;
}
std::unique_ptr<Statements> &IfStatement::firstSuite() {
return _firstSuite;
}
std::vector<std::unique_ptr<ExprNode>> &IfStatement::elifTests() {
return _elifTests;
}
std::vector<std::unique_ptr<Statements>> &IfStatement::elifSuites() {
return _elifSuites;
}
std::unique_ptr<Statements> &IfStatement::elseSuite() {
return _elseSuite;
}
void IfStatement::print() {
_firstTest->print();
std::cout << std::endl;
_firstSuite->print();
std::cout << std::endl;
for(auto &t: _elifTests)
t->print();
std::cout << std::endl;
for(auto &s: _elifSuites)
s->print();
std::cout << std::endl;
if(_elseSuite)
_elseSuite->print();
std::cout << std::endl;
}
// Function
Function::Function(): _id{""}, _parameters{}, _suite{} {}
Function::Function(std::string id, std::vector<std::string> params,
std::unique_ptr<Statements> suite):
_id{id}, _parameters{params}, _suite{std::move(suite)} {}
void Function::evaluate(SymTab &symTab, std::unique_ptr<FuncTab> &funcTab) {
_suite->evaluate(symTab, funcTab);
}
std::string &Function::id() {
return _id;
}
std::vector<std::string> &Function::params() {
return _parameters;
}
std::unique_ptr<Statements> &Function::suite() {
return _suite;
}
void Function::print() {
std::cout << _id << std::endl;
for(auto &p: _parameters)
std::cout << p << std::endl;
_suite->print();
std::cout << std::endl;
}
//Array Ops
ArrayOps::ArrayOps() : _id{""}, _op{""}, _test{nullptr} {}
ArrayOps::ArrayOps(std::string id, std::string op,
std::unique_ptr<ExprNode> test) :
_id{id}, _op{op}, _test{std::move(test)} {}
void ArrayOps::evaluate(SymTab & symTab, std::unique_ptr<FuncTab> &funcTab) {
auto type = symTab.getValueFor(_id)->type();
if(_op == "append") {
if(_test == nullptr) {
std::cout << "ArrayOps::evaluate append, no element provided\n";
exit(1);
}
auto element = _test->evaluate(symTab, funcTab);
if( type == TypeDescriptor::NUMBERARRAY ) {
if(element->type() == TypeDescriptor::INTEGER) {
auto nDesc = dynamic_cast<NumberDescriptor*>(element.get());
auto narray = dynamic_cast<NumberArray*>
(symTab.getValueFor(_id).get());
narray->nAppend(nDesc->value.intValue);
} else {
std::cout << "ArrayOps::append error: members must be of ";
std::cout << "the same type\n";
exit(1);
}
} else if(type == TypeDescriptor::STRINGARRAY) {
if(element->type() == TypeDescriptor::STRING) {
auto sDesc = dynamic_cast<StringDescriptor*>(element.get());
auto sarray = dynamic_cast<StringArray*>
(symTab.getValueFor(_id).get());
sarray->sAppend(sDesc->value);
} else {
std::cout << "ArrayOps::append error: members must be of ";
std::cout << "the same type\n";
exit(1);
}
} else if (type == TypeDescriptor::NULLARRAY) {
if(element->type() == TypeDescriptor::INTEGER) {
auto nDesc = dynamic_cast<NumberDescriptor*>(element.get());
if(nDesc == nullptr) {
std::cout << "ArrayOps::evaluate error: invalid cast";
exit(1);
}
std::shared_ptr<NumberArray> narray =
std::make_shared<NumberArray>(TypeDescriptor::NUMBERARRAY);
narray->nAppend(nDesc->value.intValue);
symTab.setValueFor(_id, narray);
} else if(element->type() == TypeDescriptor::STRING) {
auto sDesc = dynamic_cast<StringDescriptor*>(element.get());
if(sDesc == nullptr) {
std::cout << "ArrayOps::evaluate error: invalid cast";
exit(1);
}
std::shared_ptr<StringArray> sarray =
std::make_shared<StringArray>(TypeDescriptor::STRINGARRAY);
sarray->sAppend(sDesc->value);
symTab.setValueFor(_id, sarray);
} else {
std::cout << "append() is not supported for this type\n";
exit(1);
}
} else {
std::cout << "append() is not supported for this type\n";
exit(1);
}
} else if (_op == "pop") {
if( type == TypeDescriptor::NUMBERARRAY ) {
auto narray = dynamic_cast<NumberArray*>
(symTab.getValueFor(_id).get());
if(narray != nullptr) {
if(_test == nullptr)
narray->nPop();
else {
auto element = _test->evaluate(symTab, funcTab);
narray->nPopIndex(element.get());
}
}
} else if(type == TypeDescriptor::STRINGARRAY) {
auto sarray = dynamic_cast<StringArray*>
(symTab.getValueFor(_id).get());
if(sarray != nullptr) {
if(_test == nullptr)
sarray->sPop();
else {
auto element = _test->evaluate(symTab, funcTab);
sarray->sPopIndex(element.get());
}
}
} else {
std::cout << "pop is not supported for this type\n";
exit(1);
}
}
}
void ArrayOps::print(){}