diff options
Diffstat (limited to 'server/parser/operator.hpp')
-rw-r--r-- | server/parser/operator.hpp | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/server/parser/operator.hpp b/server/parser/operator.hpp index f1c24de..86b9eb1 100644 --- a/server/parser/operator.hpp +++ b/server/parser/operator.hpp @@ -10,6 +10,8 @@ #include "../lexer/token.hpp" #include "../lexer/token_type.hpp" +#include <cmath> + namespace math::server::parser { class BinaryOp { @@ -23,6 +25,7 @@ public: case Type::MINUS: case Type::ASTERISK: case Type::SLASH: + case Type::CARET: return true; default: @@ -49,25 +52,49 @@ public: case Type::SLASH: return min_precedence() + 1; + case Type::CARET: + return min_precedence() + 2; + default: throw ParserError{"internal: undefined operator precedence"}; } } + bool is_right_associative() const { + switch (m_type) { + case Type::CARET: + return true; + + default: + return false; + } + } + + bool is_left_associative() const { + return !is_right_associative(); + } + double exec(double lhs, double rhs) const { switch (m_type) { case Type::PLUS: return lhs + rhs; + case Type::MINUS: return lhs - rhs; + case Type::ASTERISK: return lhs * rhs; + case Type::SLASH: // Trapping the CPU would be better? if (rhs == 0.) { throw ParserError{"division by zero"}; } return lhs / rhs; + + case Type::CARET: + return std::pow(lhs, rhs); + default: throw ParserError{"internal: unsupported operator"}; } |