ast_interpret.cpp

#include "ast.hpp"

#include <regex>

int32_t Interpret(
    InterpretContext &context, // Contains the parameters and variable bindings
    TreePtr program
){
    std::regex reNum("^-?[0-9]+$");
    std::regex reId("^[a-z][a-z0-9]*$");
    
    if( regex_match(program->type, reNum) ){
        return std::atol(program->type.c_str());
        
    // TODO : Check for things matching reId
        
    }else if(program->type=="Param"){
        unsigned index=atol(program->value.c_str());
        auto value=context.params.at(index);
        return value;
        
    }else if(program->type=="Output"){
        int32_t val=Interpret(context, program->branches.at(0));
        std::cout<<val<<std::endl;
        return val;
        
    // TODO: Handle other constructs
        
    }else{
        throw std::runtime_error("Unknown construct '"+program->type+"'");
    }
}