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#ifndef INCLUDED_SYMTAB_
#define INCLUDED_SYMTAB_
#include <cstdint>
#include <string>
#include <vector>
#include "../exprtype/exprtype.h"
class SemVal;
class Functions;
// see README.stackframe for the construction of stackframes
struct Symtab
{
struct Var
{
std::string name; // var's name
ExprType varType; // int, string, list: | e_var
uint16_t location; // the variable's location
// (xx, 0xc0xx, 0xbfxx)
};
using VarVect = std::vector<Var>;
private:
Functions &d_functions;
std::vector<VarVect> d_var; // globals are at index 0
// function params are at index 1
// local vars are at index >= 2
std::vector<ExprType> d_locals; // types of all local variables
// of a function.
std::string d_globalCode; // initialization code of
// global variables
public:
Symtab(Functions &functions);
void defineFunction(ExprType type, std::string const &name);
void functionParams(); // forward the parameter-types to
// d_functions, and check the
// uniqueness of the parameters
SemVal defineVar(ExprType type, std::string const &name);
// 0xc000: not found
Var const &findVar(std::string const &name) const;
ExprType globalType(unsigned idx) const;
VarVect const &globalVars() const; // all global vars .f
void push(); // next level of variables
void pop(); // previous level of variables
SemVal functionDefined(SemVal &statements);
SemVal makeFrame() const;
void globalCode(std::string const &code); // add initialization 1.f
// code
std::string const &globalCode() const; // initialization code of 2.f
// global variables
private:
// -1 if not found or the var's
// in d_var.back()
int find(VarVect const &vect, std::string const &name) const;
};
#include "globaltype.f"
#include "pop.f"
#include "push.f"
#include "globalcode1.f"
#include "globalcode2.f"
#include "globalvars.f"
#endif
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