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#pragma once
#include <iostream>
#include <string>
#include <vector>
#include "global.h"
using namespace std;
class Statement;
class Expression;
using Name = string;
using StatementList = vector<Statement>;
class Site{
public:
string filename;
i64 lnum,linex;
Site();
Site(const string &filename,i64 lnum,i64 linex);
Site addX(i64 dx);
};
ostream& operator<<(ostream &os,Site site);
class Scope{
public:
enum class Type{
direct,
lazy,
function,
// async,
};
Type type;
StatementList body;
vector<Expression> args;
Site site;
Scope();
Scope(Type type,const StatementList &body,const vector<Expression> &args);
// Scope(Type type,const StatementList &body,const vector<Name> &args);
};
ostream& operator<<(ostream &os,const Scope &scope);
class Expression{
public:
enum class Type{
binop, // name, args[0], args[1]
unop, // name, args[0]
call, // name, args -- variable reference when args={}
dive, // name, args, scope -- variable dive when args={}
number, // numval
string, // strval
scope, // scope
cond, // args[0] (cond), args[1] (then), args[2] (else)
};
Type type;
Name name;
vector<Expression> args;
double numval;
string strval;
Scope scope;
Site site;
// Expression();
Expression(Type type,const Name &name,const vector<Expression> &args); // binop, call
Expression(Type type,const Name &name,const Expression &arg); // unop
Expression(Type type,const Name &name,const vector<Expression> &args,const Scope &scope); // dive
Expression(Type type,double numval); // number
Expression(Type type,const string &strval); // string
Expression(Type type,const Scope &scope); // scope
Expression(Type type,const vector<Expression> &args); // cond
};
ostream& operator<<(ostream &os,const Expression &expr);
class Statement{
public:
enum class Type{
create, // dstvar, expr
assign, // dstvar, expr
expression, // expr
};
Type type;
Name dstvar;
Expression expr;
Site site;
Statement();
Statement(Type type,const Name &dstvar,const Expression &expr); // create, assign
Statement(Type type,const Expression &expr); // expr
};
ostream& operator<<(ostream &os,const Statement &st);
ostream& operator<<(ostream &os,const StatementList &stl);
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