diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/nodes.cc | 5 | ||||
| -rw-r--r-- | src/tree.cc | 2 | ||||
| -rw-r--r-- | src/utils.cc | 122 |
3 files changed, 79 insertions, 50 deletions
diff --git a/src/nodes.cc b/src/nodes.cc index e75c02b..f15a8c9 100644 --- a/src/nodes.cc +++ b/src/nodes.cc @@ -49,12 +49,11 @@ double OperatorNode::solve() { ); } case TokenType::OPERATOR_DIVIDE: { - double rightChild = this->rightChild->solve(); + const double rightChild{ this->rightChild->solve() }; if ( rightChild != 0 ) { return this->leftChild->solve() / rightChild; - } - else { + } else { throw divide_exception(); } } diff --git a/src/tree.cc b/src/tree.cc index e377c95..bc1414b 100644 --- a/src/tree.cc +++ b/src/tree.cc @@ -100,7 +100,7 @@ std::string Tree::print() { template <typename NType, typename... Args> Node* Tree::addNode(Node** place, Args&&... args) { this->node_collection_.emplace_back( - new NType(std::forward<Args>(args)...) + std::make_unique<NType>(std::forward<Args>(args)...) ); if ( place != nullptr ) { diff --git a/src/utils.cc b/src/utils.cc index 62c3af9..752b774 100644 --- a/src/utils.cc +++ b/src/utils.cc @@ -7,7 +7,7 @@ namespace SimpleParser { -TokenType determineToken(char tmp) { +TokenType determineToken(const char tmp) { if ( std::isalpha(tmp) ) { return TokenType::VALUE_IDENTIFIER; } else { @@ -34,7 +34,7 @@ TokenType determineToken(char tmp) { } } -PrecedenceLevel precedence(TokenType token) { +PrecedenceLevel precedence(const TokenType token) { switch ( token ) { case TokenType::VALUE_NUMBER: case TokenType::VALUE_IDENTIFIER: { @@ -62,75 +62,94 @@ PrecedenceLevel precedence(TokenType token) { } std::vector<std::string> lexer(std::string term) { - std::string tmp; - std::string tmpNumber; - std::string tmpIdentifier; - std::vector<std::string> output; - TokenType token; - TokenType lastToken; + std::vector<std::string> resultBuffer; - uint32_t level = 0; + std::string levelBuffer; + std::string numberBuffer; + std::string identifierBuffer; - for ( auto termIter = term.begin(); - termIter != term.end(); - termIter++ ) { - token = determineToken(*termIter); + TokenType previousToken; + uint32_t level{0}; + + for ( auto&& termIter = term.begin(); + termIter < term.end(); + ++termIter ) { + const TokenType token{ determineToken(*termIter) }; if ( token == TokenType::VALUE_NUMBER || token == TokenType::VALUE_IDENTIFIER || ( token == TokenType::OPERATOR_MINUS && termIter == term.begin() ) ) { if ( level > 0 ) { - tmp += *termIter; + levelBuffer += *termIter; } else { - if ( token == TokenType::VALUE_NUMBER || - token == TokenType::OPERATOR_MINUS ) { - tmpNumber += *termIter; - } else if ( token == TokenType::VALUE_IDENTIFIER ) { - tmpIdentifier += *termIter; + switch ( token ) { + case TokenType::VALUE_NUMBER: + case TokenType::OPERATOR_MINUS: { + numberBuffer += *termIter; + + break; + } + case TokenType::VALUE_IDENTIFIER: { + identifierBuffer += *termIter; + + break; + } + default: { + break; + } } } } else { if ( level == 0 ) { - if ( lastToken == TokenType::VALUE_NUMBER ) { - output.push_back(tmpNumber); - tmpNumber.clear(); - } else if ( lastToken == TokenType::VALUE_IDENTIFIER ) { - output.push_back(tmpIdentifier); - tmpIdentifier.clear(); + switch ( previousToken ) { + case TokenType::VALUE_NUMBER: { + resultBuffer.push_back(numberBuffer); + numberBuffer.clear(); + + break; + } + case TokenType::VALUE_IDENTIFIER: { + resultBuffer.push_back(identifierBuffer); + identifierBuffer.clear(); + + break; + } + default: { + break; + } } } switch ( token ) { case TokenType::PARENTHESES_OPEN: { if ( level > 0 ) { - tmp += *termIter; + levelBuffer += *termIter; } - level++; + ++level; break; } case TokenType::PARENTHESES_CLOSE: { - level--; + --level; if ( level == 0 ) { - output.push_back(tmp); - tmp.clear(); + resultBuffer.push_back(levelBuffer); + levelBuffer.clear(); } else { - tmp += *termIter; + levelBuffer += *termIter; } break; } default: { if ( level == 0 ) { - std::string helper; - helper = *termIter; + const std::string helper{ *termIter }; - output.push_back(helper); + resultBuffer.push_back(helper); } else { - tmp += *termIter; + levelBuffer += *termIter; } break; @@ -138,27 +157,38 @@ std::vector<std::string> lexer(std::string term) { } } - lastToken = token; + previousToken = token; } - if ( lastToken == TokenType::VALUE_NUMBER ) { - output.push_back(tmpNumber); - } else if ( lastToken == TokenType::VALUE_IDENTIFIER ) { - output.push_back(tmpIdentifier); - } else if ( lastToken != TokenType::PARENTHESES_CLOSE ) { - throw operator_exception(); + switch ( previousToken ) { + case TokenType::VALUE_NUMBER: { + resultBuffer.push_back(numberBuffer); + + break; + } + case TokenType::VALUE_IDENTIFIER: { + resultBuffer.push_back(identifierBuffer); + + break; + } + case TokenType::PARENTHESES_CLOSE: { + break; + } + default: { + throw operator_exception(); + } } if ( level != 0 ) { throw parenthese_exception(); } - if ( lastToken == TokenType::PARENTHESES_CLOSE && - output.size() == 1 ) { - output = lexer(output[0]); + if ( previousToken == TokenType::PARENTHESES_CLOSE && + resultBuffer.size() == 1 ) { + resultBuffer = lexer(resultBuffer[0]); } - return output; + return resultBuffer; } double doubleToString(const std::string& str) { |