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interpreter.h
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interpreter.h
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#pragma once
#ifndef INTERPRETER_H
#define INTERPRETER_H
#include <map>
#include <chrono>
#include <string>
#include <vector>
#include <regex>
#include <variant>
#include <iostream>
#include <fstream>
#include <stdlib.h>
#include "include/peglib.h"
enum liaVariableType
{
boolean,
integer,
longint,
string,
array,
dictionary,
floatingPoint
};
struct liaVariable
{
std::string name;
liaVariableType type;
std::variant<bool, int, long long, std::string> value;
std::vector<liaVariable> vlist;
std::map<std::string,liaVariable> vMap;
bool operator== (const liaVariable& n1)
{
if (n1.value == this->value)
{
int idx = 0;
for (auto& el : this->vlist)
{
if (el.value != n1.vlist[idx].value)
{
return false;
}
idx += 1;
}
return true;
}
return false;
};
};
struct liaEnvironment
{
// a map is like 30x faster than a vector here
// an unordered_map should be even faster
std::unordered_map<std::string, liaVariable> varMap;
};
struct liaFunctionParam
{
std::string name;
};
struct liaFunction
{
std::string name;
std::vector<liaFunctionParam> parameters;
std::shared_ptr<peg::Ast> functionCodeBlockAst;
};
class interpreterException : public std::exception
{
public:
char* what()
{
return (char*)"Interpreter exception";
}
};
class liaInterpreter
{
private:
liaEnvironment globalScope;
std::vector<liaFunction> functionList;
int validateMainFunction(std::shared_ptr<peg::Ast> theAst);
bool evaluateCondition(std::shared_ptr<peg::Ast> theAst, liaEnvironment* env);
template <typename T> bool primitiveComparison(T leftop, T rightop, std::string relOp);
bool arrayComparison(std::vector<liaVariable> leftop, std::vector<liaVariable> rightop, std::string relOp);
bool liaVariableArrayComparison(liaVariable& v0, liaVariable& v1);
void replaceAll(std::string& str, const std::string& from, const std::string& to);
liaVariable evaluateExpression(const std::shared_ptr<peg::Ast>& theAst,liaEnvironment* env);
liaVariable exeCuteCodeBlock(const std::shared_ptr<peg::Ast>& theAst, liaEnvironment* env);
liaVariable exeCuteMethodCallStatement(const std::shared_ptr<peg::Ast>& theAst, liaEnvironment* env,std::string varName);
liaVariable exeCuteFuncCallStatement(const std::shared_ptr<peg::Ast>& theAst, liaEnvironment* env);
void exeCuteVarDeclStatement(const std::shared_ptr<peg::Ast>& theAst, liaEnvironment* env);
void exeCuteArrayAssignmentStatement(const std::shared_ptr<peg::Ast>& theAst, liaEnvironment* env);
void exeCuteIncrementStatement(const std::shared_ptr<peg::Ast>& theAst, liaEnvironment* env,int inc);
void exeCuteRshiftStatement(const std::shared_ptr<peg::Ast>& theAst, liaEnvironment* env);
void exeCuteLshiftStatement(const std::shared_ptr<peg::Ast>& theAst, liaEnvironment* env);
void exeCuteLogicalAndStatement(const std::shared_ptr<peg::Ast>& theAst, liaEnvironment* env);
void exeCuteLogicalOrStatement(const std::shared_ptr<peg::Ast>& theAst, liaEnvironment* env);
void exeCuteMultiplyStatement(const std::shared_ptr<peg::Ast>& theAst, liaEnvironment* env);
void exeCuteDivideStatement(const std::shared_ptr<peg::Ast>& theAst, liaEnvironment* env);
void exeCuteModuloStatement(const std::shared_ptr<peg::Ast>& theAst, liaEnvironment* env);
liaVariable exeCuteWhileStatement(const std::shared_ptr<peg::Ast>& theAst, liaEnvironment* env);
liaVariable exeCuteForeachStatement(const std::shared_ptr<peg::Ast>& theAst, liaEnvironment* env);
liaVariable exeCuteIfStatement(const std::shared_ptr<peg::Ast>& theAst, liaEnvironment* env);
void innerPrint(liaVariable& var);
void exeCuteLibFunctionPrint(const std::shared_ptr<peg::Ast>& theAst,liaEnvironment* env);
liaVariable exeCuteLibFunctionReadFile(std::string fname,int linenum);
liaVariable customFunctionCall(std::string& fname, std::vector<liaVariable>* parameters, liaEnvironment* env,size_t lineNum);
void addvarOrUpdateEnvironment(liaVariable* v, liaEnvironment* env,size_t curLine);
void fatalError(std::string err);
public:
liaInterpreter();
int validateAst(std::shared_ptr<peg::Ast> theAst);
int storeGlobalVariables(std::shared_ptr<peg::Ast> theAst);
void getFunctions(std::shared_ptr<peg::Ast> theAst);
void dumpFunctions();
void exeCute(const std::shared_ptr<peg::Ast>& theAst,std::vector<std::string> params);
~liaInterpreter();
};
#endif