SymbolTable.cpp

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#include "SymbolTable.hpp"
 
namespace infix2postfix {
 
SymbolTable::SymbolTable(SymbolTable* parent) : parent(parent) {}
 
bool SymbolTable::define(const std::shared_ptr<Symbol>& symbol) {
    if (symbols.contains(symbol->name)) {
        return false;
    }
    symbols[symbol->name] = symbol;
    return true;
}
 
std::shared_ptr<Symbol> SymbolTable::resolve(const std::string& name) const {
    auto it = symbols.find(name);
    if (it != symbols.end()) {
        return it->second;
    }
    if (parent != nullptr) {
        return parent->resolve(name);
    }
    return nullptr;
}
 
} // namespace infix2postfix