Expression* sintactico::J()
{
if(CurrentToken->tipo == GUION)
{
CurrentToken = Lexer->NexToken();
Expression *expr;
expr = new exprNegative(A(),Lexer->linea);
}
else if(CurrentToken->tipo == PARENTESIS_I)
{
CurrentToken = Lexer->NexToken();
Expression* expression = A();
if(CurrentToken->tipo != PARENTESIS_D)
{
Fallo = true;
return NULL;
}
CurrentToken = Lexer->NexToken();
return expression;
}
else if(CurrentToken->tipo == IDENTIFICADOR)
{
Expression* expression = NULL;
Token T = *CurrentToken;
string str = T.lexema;
CurrentToken = Lexer->NexToken();
if(CurrentToken->tipo == PARENTESIS_I)
{
expression = MethodCallExpression(T);
if(Fallo)
return NULL;
}
else if(CurrentToken->tipo == CORCHETE_I)
{
exprLvalue *lv = Lvalue();
lv->setId(str);
expression = lv;
if(Fallo)
return NULL;
}
else
{
expression = new exprLvalue(str,Lexer->linea);
}
if(Fallo)
return NULL;
return expression;
}
else if(CurrentToken->tipo == INTCONSTANT || CurrentToken->tipo == CADENA ||
CurrentToken->tipo == BOOLCONSTANT)
{
Expression* expression = Constant();
if(Fallo)
return NULL;
return expression;
}
else
{
Fallo = true;
MensajeError("Se esperaba una constante o identificador",Lexer->linea);
return NULL;
}
}
auto lValues() const {
return
this->lists
| ranges::view::transform
( []( const auto& list ){ return Lvalue( list ); } );
}
