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CRules.cpp
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CRules.cpp
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/////////////////
//
// Práctica de Compilación I (Curso 2010-2011)
//
// FICHERO: CRules.cpp
// OBJETIVO: Definición de las reglas de la gramática y su semántica.
// LICENCIA: Mira el fichero LICENSE en el directorio raíz.
// AUTORES: El equipo del JAG.
//
#include "CRules.h"
// Las siguientes tuplas son demasiado repetitivas a lo largo del código, en
// las definiciones de primero y siguiente, así que nos creamos unas constantes
// que las definen para claridad del código.
#define OPREL_TUPLES ( OPERATOR, "<" ), ( OPERATOR, ">" ), \
( OPERATOR, "<=" ), ( OPERATOR, ">=" ), \
( OPERATOR, "==" ), ( OPERATOR, "/=" )
#define OPL1_TUPLES ( OPERATOR, "*" ), ( OPERATOR, "/" )
#define OPL2_TUPLES ( OPERATOR, "+" ), ( OPERATOR, "-" )
DEFINE_RULE (programa,
FIRST(
( RESERVED, "programa" )
),
NEXT(
( END_OF_FILE )
)
)
{
MATCH ( RESERVED, "programa" );
TOKEN ID = MATCH ( IDENTIFIER );
{ ADD_INST ( "prog " || ID.value ); }
RULE ( declaraciones )();
RULE ( decl_de_subprogs )();
MATCH ( RESERVED, "comienzo" );
RULE ( lista_de_sentencias_prima )();
MATCH ( RESERVED, "fin" );
MATCH ( SEPARATOR, ";" );
{ ADD_INST ( "halt" ); }
}
DEFINE_RULE(declaraciones,
FIRST(
( RESERVED, "variables" ),
( EMPTY )
),
NEXT(
( RESERVED, "procedimiento" ),
( RESERVED, "funcion" ),
( RESERVED, "comienzo" )
)
)
{
if ( IS_FIRST ( RESERVED, "variables" ) )
{
MATCH ( RESERVED, "variables" );
RULE ( lista_de_ident, ls_ident )();
MATCH ( SEPARATOR, ":" );
RULE ( tipo, t ) ();
MATCH ( SEPARATOR, ";" );
{
if ( IS_INTEGER(t.tipo) || IS_REAL(t.tipo) || IS_BOOLEAN(t.tipo) )
{
FOREACH ( ls_ident.ids AS ident )
{
if ( ST_ADD(ident, t.tipo) )
{
ADD_INST(TYPE_OF(t.tipo) || " " || ident );
}
}
}
else if ( IS_ARRAY(t.tipo) )
{
FOREACH ( ls_ident.ids AS ident )
{
if ( ST_ADD(ident, t.tipo) )
{
ADD_INST("array_" || TYPE_OF(ARRAY_CONTENT(t.tipo))
|| " " || ident || "," || ARRAY_SIZE(t.tipo) );
}
}
}
}
RULE( declaraciones )();
}
else
{
// Vacío
}
}
DEFINE_RULE(lista_de_ident,
FIRST(
( IDENTIFIER )
),
NEXT(
( RESERVED, ":" )
)
)
{
TOKEN ID = MATCH ( IDENTIFIER );
RULE ( resto_lista_ident, resto )();
{ THIS.ids = JOIN(INIT_LIST(ID.value), resto.ids); }
}
DEFINE_RULE(resto_lista_ident,
FIRST(
( SEPARATOR, "," ),
( EMPTY )
),
NEXT(
( RESERVED, ":" )
)
)
{
if ( IS_FIRST ( SEPARATOR, "," ) )
{
MATCH ( SEPARATOR, "," );
TOKEN ID = MATCH ( IDENTIFIER );
RULE ( resto_lista_ident, resto )();
{ THIS.ids = JOIN(INIT_LIST(ID.value), resto.ids); }
}
else
{
{ THIS.ids = EMPTY_LIST(); }
}
}
DEFINE_RULE(tipo,
FIRST(
( RESERVED, "entero" ),
( RESERVED, "real" ),
( RESERVED, "booleano" ),
( RESERVED, "array" )
),
NEXT(
( SEPARATOR, ";" ),
( RESERVED, "variables" ),
( RESERVED, "comienzo" ),
( SEPARATOR, ")" )
)
)
{
if ( IS_FIRST ( RESERVED, "entero" ) )
{
MATCH ( RESERVED, "entero" );
{ THIS.tipo = NEW_BASIC_TYPE(INTEGER); }
}
else if ( IS_FIRST ( RESERVED, "real" ) )
{
MATCH ( RESERVED, "real" );
{ THIS.tipo = NEW_BASIC_TYPE(REAL); }
}
else if ( IS_FIRST ( RESERVED, "booleano" ) )
{
MATCH ( RESERVED, "booleano" );
{ THIS.tipo = NEW_BASIC_TYPE(BOOLEAN); }
}
else if ( IS_FIRST ( RESERVED, "array" ) )
{
MATCH ( RESERVED, "array" );
MATCH ( SEPARATOR, "[" );
RULE ( lista_de_enteros, ls )();
MATCH ( SEPARATOR, "]" );
MATCH ( RESERVED, "de" );
RULE ( tipo, t )();
{ THIS.tipo = NEW_ARRAY_TYPE(ls.ints, t.tipo); }
}
else PANIC();
}
DEFINE_RULE(lista_de_enteros,
FIRST(
( INTEGER )
),
NEXT(
( SEPARATOR, "]" )
)
)
{
TOKEN INT = MATCH ( INTEGER );
RULE ( resto_lista_enteros, resto )();
{ THIS.ints = JOIN(INIT_LIST(INT.value), resto.ints); }
}
DEFINE_RULE(resto_lista_enteros,
FIRST(
( SEPARATOR, "," ),
( EMPTY )
),
NEXT(
( SEPARATOR, "]" )
)
)
{
if ( IS_FIRST ( SEPARATOR, "," ) )
{
MATCH ( SEPARATOR, "," );
TOKEN INT = MATCH ( INTEGER );
RULE ( resto_lista_enteros, resto )();
{ THIS.ints = JOIN(INIT_LIST(INT.value), resto.ints); }
}
else
{
{ THIS.ints = EMPTY_LIST(); }
}
}
DEFINE_RULE(decl_de_subprogs,
FIRST(
( RESERVED, "procedimiento" ),
( RESERVED, "funcion" ),
( EMPTY )
),
NEXT(
( RESERVED, "comienzo" )
)
)
{
if ( IS_RULE_FIRST ( decl_de_procedimiento ) )
{
RULE ( decl_de_procedimiento, proc )();
{
ST_ADD ( proc.nombre, NEW_PROCEDURE_TYPE(proc.args, proc.classes) );
}
RULE ( decl_de_subprogs )();
}
else if ( IS_RULE_FIRST ( decl_de_funcion ) )
{
RULE ( decl_de_funcion, func )();
{
ST_ADD ( func.nombre, NEW_FUNCTION_TYPE(func.args, func.classes, func.tipoRetorno) );
}
RULE ( decl_de_subprogs )();
}
else
{
// Vacío.
}
}
DEFINE_RULE(decl_de_procedimiento,
FIRST(
( RESERVED, "procedimiento" )
),
NEXT(
( RESERVED, "procedimiento" ),
( RESERVED, "funcion" ),
( RESERVED, "comienzo" )
)
)
{
{ ST_PUSH(); }
RULE ( cabecera_procedimiento, c )();
RULE ( declaraciones )();
MATCH ( RESERVED, "comienzo" );
RULE ( lista_de_sentencias_prima )();
MATCH ( RESERVED, "fin" );
{ ADD_INST ( "finproc" ); }
MATCH ( SEPARATOR, ";" );
{
ST_POP();
THIS.args = c.args;
THIS.classes = c.classes;
THIS.nombre = c.nombre;
}
}
DEFINE_RULE(decl_de_funcion,
FIRST(
( RESERVED, "funcion" )
),
NEXT(
( RESERVED, "procedimiento" ),
( RESERVED, "funcion" ),
( RESERVED, "comienzo" )
)
)
{
{ ST_PUSH(); }
RULE ( cabecera_funcion , c )();
RULE ( declaraciones )();
MATCH ( RESERVED, "comienzo" );
RULE ( lista_de_sentencias_prima )();
MATCH ( RESERVED, "retornar" );
RULE ( expresion , e )();
{
ADD_INST ( "ret " || TYPECAST( e.nombre, e.tipo, c.tipoRetorno, e.gtrue, e.gfalse ) );
ADD_INST ( "finfunc" );
}
MATCH ( SEPARATOR, ";" );
MATCH ( RESERVED, "fin" );
MATCH ( SEPARATOR, ";" );
{
ST_POP();
THIS.args = c.args;
THIS.classes = c.classes;
THIS.nombre = c.nombre;
THIS.tipoRetorno = c.tipoRetorno;
}
}
DEFINE_RULE(cabecera_procedimiento,
FIRST(
( RESERVED, "procedimiento" )
),
NEXT(
( RESERVED, "variables"),
( RESERVED, "comienzo")
)
)
{
MATCH ( RESERVED, "procedimiento" );
TOKEN ID = MATCH ( IDENTIFIER );
{ ADD_INST ( "proc " || ID.value ); }
RULE ( argumentos, args )();
{
THIS.nombre = ID.value;
THIS.args = args.args;
THIS.classes = args.classes;
}
}
DEFINE_RULE(cabecera_funcion,
FIRST(
( RESERVED, "funcion" )
),
NEXT(
( RESERVED, "variables"),
( RESERVED, "comienzo")
)
)
{
MATCH ( RESERVED, "funcion" );
TOKEN ID = MATCH ( IDENTIFIER );
{ ADD_INST ( "func " || ID.value ); }
RULE ( argumentos, args )();
MATCH ( RESERVED, "retorna" );
RULE ( tipo , t )();
{
THIS.tipoRetorno = t.tipo;
THIS.nombre = ID.value;
THIS.args = args.args;
THIS.classes = args.classes;
}
}
DEFINE_RULE(argumentos,
FIRST(
( SEPARATOR, "(" ),
( EMPTY )
),
NEXT(
( RESERVED, "variables"),
( RESERVED, "comienzo"),
( RESERVED, "retorna")
)
)
{
if ( IS_FIRST ( SEPARATOR, "(" ) )
{
MATCH ( SEPARATOR, "(" );
RULE ( lista_de_param, ls )();
MATCH ( SEPARATOR, ")" );
{
THIS.args = ls.args;
THIS.classes = ls.classes;
}
}
else
{
THIS.args = EMPTY_LIST ();
THIS.classes = EMPTY_LIST ();
}
}
DEFINE_RULE(lista_de_param,
FIRST(
( IDENTIFIER )
),
NEXT(
( SEPARATOR, ")" )
)
)
{
RULE ( lista_de_ident , ls_ident )();
MATCH ( SEPARATOR, ":" );
RULE ( clase_param , clase )();
RULE ( tipo , t )();
{
THIS.args = EMPTY_LIST ();
THIS.classes = EMPTY_LIST ();
FOREACH ( ls_ident.ids AS id )
{
ADD_INST( clase.clase || "_" || TYPE_OF(t.tipo) || " " || id );
ST_ADD ( id, t.tipo );
THIS.args = JOIN(THIS.args, INIT_LIST(t.tipo));
THIS.classes = JOIN(THIS.classes, INIT_LIST(clase.clase));
}
}
RULE ( resto_lis_de_param, resto )();
{
THIS.args = JOIN(THIS.args, resto.args);
THIS.classes = JOIN(THIS.classes, resto.classes);
}
}
DEFINE_RULE(resto_lis_de_param,
FIRST(
( SEPARATOR, ";" ),
( EMPTY )
),
NEXT(
( SEPARATOR, ")" )
)
)
{
if ( IS_FIRST ( SEPARATOR, ";" ) )
{
MATCH ( SEPARATOR, ";" );
RULE ( lista_de_ident, ls_ident )();
MATCH ( SEPARATOR, ":" );
RULE ( clase_param, clase )();
RULE ( tipo , t )();
{
THIS.args = EMPTY_LIST();
THIS.classes = EMPTY_LIST();
FOREACH ( ls_ident.ids AS id )
{
ADD_INST( clase.clase || "_" || TYPE_OF(t.tipo) || " " || id );
ST_ADD ( id, t.tipo );
THIS.args = JOIN(THIS.args, INIT_LIST(t.tipo));
THIS.classes = JOIN(THIS.classes, INIT_LIST(clase.clase));
}
}
RULE ( resto_lis_de_param, resto )();
{
THIS.args = JOIN(THIS.args, resto.args);
THIS.classes = JOIN(THIS.classes, resto.classes);
}
}
else
{
THIS.args = EMPTY_LIST ();
THIS.classes = EMPTY_LIST ();
}
}
DEFINE_RULE(clase_param,
FIRST(
( RESERVED, "entrada" ),
( RESERVED, "salida" )
),
NEXT(
( RESERVED, "entero" ),
( RESERVED, "real"),
( RESERVED, "booleano"),
( RESERVED, "array" )
)
)
{
if ( IS_FIRST( RESERVED, "entrada" ) )
{
MATCH ( RESERVED, "entrada" );
RULE ( clase_param_prima , c_p )();
{ THIS.clase = c_p.clase; }
}
else if ( IS_FIRST( RESERVED, "salida" ) )
{
MATCH ( RESERVED, "salida" );
{ THIS.clase = "ref"; }
}
else PANIC();
}
DEFINE_RULE(clase_param_prima,
FIRST(
( RESERVED, "salida" ),
( EMPTY )
),
NEXT(
( RESERVED, "entero" ),
( RESERVED, "real"),
( RESERVED, "booleano"),
( RESERVED, "array" )
)
)
{
if ( IS_FIRST( RESERVED, "salida" ) )
{
MATCH ( RESERVED, "salida" );
{ THIS.clase = "ref"; }
}
else
{
{ THIS.clase = "val"; }
}
}
DEFINE_RULE(lista_de_sentencias_prima,
FIRST(
( IDENTIFIER ),
( RESERVED, "si" ),
( RESERVED, "hacer" ),
( RESERVED, "salir" ),
( RESERVED, "get" ),
( RESERVED, "put_line" ),
( EMPTY )
),
NEXT(
( RESERVED, "fin" ),
( RESERVED, "retorna" )
)
)
{
RULE ( lista_de_sentencias, ls );
{ ls.hinloop = false; }
ls();
}
DEFINE_RULE(lista_de_sentencias,
FIRST(
( IDENTIFIER ),
( RESERVED, "si" ),
( RESERVED, "hacer" ),
( RESERVED, "salir" ),
( RESERVED, "get" ),
( RESERVED, "put_line" ),
( EMPTY )
),
NEXT(
( RESERVED, "fin" ),
( RESERVED, "retorna" ),
( RESERVED, "mientras" )
)
)
{
if ( IS_RULE_FIRST(sentencia) )
{
RULE ( sentencia, s );
{ s.hinloop = THIS.hinloop; }
s();
RULE ( lista_de_sentencias, ls );
{ ls.hinloop = THIS.hinloop; }
ls();
{ THIS.salir_si = JOIN ( s.salir_si , ls.salir_si ); }
}
else
{
{ THIS.salir_si = EMPTY_LIST(); }
}
}
DEFINE_RULE(sentencia,
FIRST(
( IDENTIFIER ),
( RESERVED, "si" ),
( RESERVED, "hacer" ),
( RESERVED, "salir" ),
( RESERVED, "get" ),
( RESERVED, "put_line" )
),
NEXT(
( IDENTIFIER ),
( RESERVED, "si" ),
( RESERVED, "hacer" ),
( RESERVED, "salir" ),
( RESERVED, "get" ),
( RESERVED, "put_line" ),
( RESERVED, "fin" ),
( RESERVED, "retorna" ),
( RESERVED, "mientras" )
)
)
{
if (IS_FIRST ( IDENTIFIER ) )
{
TOKEN id = MATCH ( IDENTIFIER );
RULE ( asignacion_o_llamada , a );
{
a.hident = id.value;
}
a();
MATCH ( SEPARATOR, ";" );
{ THIS.salir_si = EMPTY_LIST(); }
}
else if (IS_FIRST ( RESERVED, "si" ) )
{
MATCH ( RESERVED, "si" );
RULE ( expresion , e )();
{
TYPECAST( e.nombre, e.tipo, NEW_BASIC_TYPE(BOOLEXPR), e.gtrue, e.gfalse);
}
MATCH ( RESERVED, "entonces" );
RULE ( M , m1 )();
RULE ( lista_de_sentencias, ls );
{
ls.hinloop = THIS.hinloop;
}
ls();
MATCH ( RESERVED, "fin");
MATCH ( RESERVED, "si");
RULE ( M , m2 )();
MATCH ( SEPARATOR, ";");
{
COMPLETE( e.gtrue , m1.ref );
COMPLETE( e.gfalse, m2.ref );
THIS.salir_si = ls.salir_si;
}
}
else if (IS_FIRST ( RESERVED, "hacer" ) )
{
MATCH ( RESERVED, "hacer" );
RULE ( M , m1 )();
RULE ( lista_de_sentencias, ls );
{
ls.hinloop = true;
}
ls();
MATCH ( RESERVED, "mientras" );
RULE ( expresion , e )();
{
TYPECAST( e.nombre, e.tipo, NEW_BASIC_TYPE(BOOLEXPR), e.gtrue, e.gfalse);
}
MATCH ( RESERVED, "fin" );
MATCH ( RESERVED, "hacer" );
RULE ( M , m2 )();
MATCH ( SEPARATOR, ";");
{
COMPLETE( e.gtrue , m1.ref );
COMPLETE( e.gfalse, m2.ref );
COMPLETE( ls.salir_si, m2.ref );
THIS.salir_si = EMPTY_LIST();
}
}
else if (IS_FIRST ( RESERVED, "salir"))
{
MATCH ( RESERVED, "salir" );
MATCH ( RESERVED, "si" );
{
if ( THIS.hinloop == false )
ERROR ( "`salir si` outside a loop" );
}
RULE ( expresion , e )();
RULE ( M , m )();
{
COMPLETE( e.gfalse, m.ref );
THIS.salir_si = e.gtrue;
}
MATCH ( SEPARATOR, ";");
}
else if (IS_FIRST ( RESERVED, "get"))
{
MATCH ( RESERVED, "get" );
MATCH ( SEPARATOR, "(" );
TOKEN ID = MATCH ( IDENTIFIER );
RULE ( id_o_array, ioa );
{ ioa.hident = ID.value; }
ioa ();
MATCH ( SEPARATOR, ")" );
MATCH ( SEPARATOR, ";" );
{
THIS.salir_si = EMPTY_LIST ();
ADD_INST ( "read " || ioa.nombre );
}
}
else if (IS_FIRST ( RESERVED, "put_line"))
{
MATCH ( RESERVED, "put_line" );
MATCH ( SEPARATOR, "(" );
RULE ( expresion , e )();
MATCH ( SEPARATOR, ")");
MATCH ( SEPARATOR, ";");
{
THIS.salir_si = EMPTY_LIST ();
ADD_INST ( "write " || e.nombre );
ADD_INST ( "writeln" );
}
}
else PANIC();
}
DEFINE_RULE(id_o_array,
FIRST(
( SEPARATOR, "[" ),
( EMPTY )
),
NEXT(
( SEPARATOR, ")" )
)
)
{
if ( IS_RULE_FIRST ( acceso_a_array ) )
{
RULE ( acceso_a_array, a );
{
a.hident = THIS.hident;
a.htipo = NEW_BASIC_TYPE(UNKNOWN);
}
a();
{
THIS.nombre = THIS.hident || "[" || a.offset || "]";
}
}
else
{
if ( ST_EXISTS(THIS.hident) == false )
ERROR("Unknown identifier '" || THIS.hident || "'");
THIS.nombre = THIS.hident;
}
}
DEFINE_RULE(asignacion_o_llamada,
FIRST(
( OPERATOR, "=" ),
( OPERATOR, "[" ),
( OPERATOR, "(" )
),
NEXT(
( SEPARATOR, ";" ),
( SEPARATOR, ")" )
)
)
{
if (IS_FIRST( OPERATOR, "=" ))
{
MATCH ( OPERATOR, "=" );
RULE ( expresion , e )();
{
VAR tipo;
if ( ST_EXISTS (THIS.hident))
tipo = ST_GET_TYPE(THIS.hident);
else
{
tipo = NEW_BASIC_TYPE(UNKNOWN);
ERROR ( "Identifier '" || THIS.hident || "' not found" );
}
ADD_INST( THIS.hident || " := " || TYPECAST( e.nombre, e.tipo, tipo, e.gtrue, e.gfalse ) );
}
}
else if (IS_RULE_FIRST( acceso_a_array ))
{
RULE ( acceso_a_array , a );
{
a.hident = THIS.hident;
a.htipo = NEW_BASIC_TYPE(UNKNOWN);
}
a();
MATCH ( OPERATOR, "=" );
RULE ( expresion , e )();
{
ADD_INST ( THIS.hident || "[" || a.offset || "]" ||
" := " || TYPECAST(e.nombre, e.tipo, a.tipo) );
}
}
else if (IS_RULE_FIRST( parametros_llamadas ))
{
RULE ( parametros_llamadas , p );
{
p.hident = THIS.hident;
p.hrequireFunc = false;
}
p();
{
ADD_INST( "call " || THIS.hident );
}
}
else PANIC();
}
DEFINE_RULE(acceso_a_array,
FIRST(
( SEPARATOR, "[" )
),
NEXT(
( OPERATOR, "=" ),
OPL1_TUPLES,
OPL2_TUPLES,
OPREL_TUPLES,
( RESERVED, "and" ),
( RESERVED, "or" ),
( RESERVED, "entonces" ),
( RESERVED, "fin" ),
( SEPARATOR, ";" ),
( SEPARATOR, ")" ),
( SEPARATOR, "]" ),
( SEPARATOR, "," )
)
)
{
MATCH ( SEPARATOR, "[" );
RULE ( lista_de_expr, ls )();
MATCH ( SEPARATOR, "]" );
RULE ( acceso_a_array_prima, otros )();
{
THIS.offset = NEW_IDENT ();
ADD_INST ( THIS.offset || " := 0" );
VAR exprs = JOIN(ls.exprs, otros.exprs);
VAR tipos = JOIN(ls.tipos, otros.tipos);
if ( IS_UNKNOWN(THIS.htipo) == true && ST_EXISTS(THIS.hident) == false )
{
ERROR ( "Identifier '" || THIS.hident || "' not found." );
THIS.tipo = NEW_BASIC_TYPE ( UNKNOWN );
}
else
{
VAR tipo;
if ( IS_UNKNOWN(THIS.htipo) == true )
tipo = ST_GET_TYPE ( THIS.hident );
else
tipo = THIS.htipo;
if ( IS_ARRAY(tipo) == false )
{
ERROR( "Identifier '" || THIS.hident || "' is not of type 'array'.");
THIS.tipo = NEW_BASIC_TYPE ( UNKNOWN );
}
else
{
THIS.tipo = ARRAY_CONTENT(tipo);
if ( LIST_SIZE(exprs) > ARRAY_DEPTH(tipo) )
ERROR ( "Too many subscripts for array '" || THIS.hident || "'" );
else if ( LIST_SIZE(exprs) < ARRAY_DEPTH(tipo) )
ERROR ( "Too few subscripts for array '" || THIS.hident || "'" );
else
{
VAR i = 0;
VAR curDimension = ARRAY_DEPTH(tipo) - 1;
FOREACH ( exprs AS nombre )
{
ADD_INST ( THIS.offset || " := " || THIS.offset || " * " || ARRAY_DIMENSION(tipo, curDimension) );
ADD_INST ( THIS.offset || " := " || THIS.offset || " + " ||
TYPECAST(nombre, LIST_ITEM(tipos,i), NEW_BASIC_TYPE(INTEGER)) );
curDimension = curDimension - 1;
i = i + 1;
}
}
}
}
}
}
DEFINE_RULE(acceso_a_array_prima,
FIRST(
( SEPARATOR, "[" ),
( EMPTY )
),
NEXT(
( OPERATOR, "=" ),
OPL1_TUPLES,
OPL2_TUPLES,
OPREL_TUPLES,
( RESERVED, "and" ),
( RESERVED, "or" ),
( RESERVED, "entonces" ),
( RESERVED, "fin" ),
( SEPARATOR, ";" ),
( SEPARATOR, ")" ),
( SEPARATOR, "]" ),
( SEPARATOR, "," )
)
)
{
if ( IS_FIRST ( SEPARATOR, "[" ) )
{
MATCH ( SEPARATOR, "[" );
RULE ( lista_de_expr, ls )();
MATCH ( SEPARATOR, "]" );
RULE ( acceso_a_array_prima, otros )();
{
THIS.exprs = JOIN(ls.exprs, otros.exprs);
THIS.tipos = JOIN(ls.tipos, otros.tipos);
}
}
else
{
// Vacío
THIS.exprs = EMPTY_LIST();
THIS.tipos = EMPTY_LIST();
}
}
DEFINE_RULE(parametros_llamadas,
FIRST(
( SEPARATOR, "(" )
),
NEXT(
OPL1_TUPLES,
OPL2_TUPLES,
OPREL_TUPLES,
( RESERVED, "and" ),
( RESERVED, "or" ),
( RESERVED, "entonces" ),
( RESERVED, "fin" ),
( SEPARATOR, ";" ),
( SEPARATOR, ")" ),
( SEPARATOR, "]" ),
( SEPARATOR, "]" ),
( SEPARATOR, "," )
)
)
{
MATCH ( SEPARATOR, "(" );
RULE ( lista_de_expr, ls )();
MATCH ( SEPARATOR, ")" );
{
if ( ST_EXISTS ( THIS.hident ) == false )
{
ERROR ( "Unknown identifier '" || THIS.hident || "'" );
THIS.tipoRetorno = NEW_BASIC_TYPE ( UNKNOWN );
}
else
{
VAR tipo = ST_GET_TYPE ( THIS.hident );
if ( ( IS_FUNCTION ( tipo ) || IS_PROCEDURE ( tipo ) ) == false )
{
ERROR ( "Attempting to call '" || THIS.hident || "', which is not a function or procedure." );
THIS.tipoRetorno = NEW_BASIC_TYPE ( UNKNOWN );
}
else if ( THIS.hrequireFunc == true && IS_PROCEDURE ( tipo ) )
{
ERROR ( "You cannot call '" || THIS.hident || "' from here. It must be a function." );
THIS.tipoRetorno = NEW_BASIC_TYPE ( UNKNOWN );
}
else
{
if ( IS_PROCEDURE ( tipo ) )
{
THIS.tipoRetorno = NEW_BASIC_TYPE ( UNKNOWN );
if ( THIS.hrequireFunc == true )
ERROR ( "You cannot call '" || THIS.hident || "' from here. It must be a function." );
}
else
THIS.tipoRetorno = FUNCTION_RETURN( tipo );
if ( LIST_SIZE(ls.exprs) != SUBPROG_NUM_PARAMS(tipo) )
{
ERROR ( "Wrong number of arguments for '" || THIS.hident || "'" );
}
else
{
VAR i = 0;
FOREACH ( ls.exprs AS expr )
{
VAR paramTipo = LIST_ITEM(ls.tipos, i);
VAR reqTipo = SUBPROG_PARAM(tipo, i);
if ( SUBPROG_PARAM_CLASS(tipo, i) == "ref" && LIST_ITEM(ls.literales, i) == true )
ERROR ( "You cannot pass literal values as out parameters." );
else if ( SUBPROG_PARAM_CLASS(tipo, i) == "ref" && paramTipo != reqTipo )
ERROR ( "Cannot make type conversion for parameter #" || i || " of '" || THIS.hident || "' (Out parameter types must match)" );
else
ADD_INST ( "param_" || SUBPROG_PARAM_CLASS(tipo, i) || " " || TYPECAST(expr, paramTipo, reqTipo) );
i = i + 1;
}
}
}
}
}
}
DEFINE_RULE(expresion,
FIRST(
( RESERVED, "not" ),
( OPERATOR, "-" ),
( IDENTIFIER ),
( INTEGER ),
( REAL ),
( RESERVED, "true" ),
( RESERVED, "false" ),
( SEPARATOR, "(" )
),
NEXT(
( RESERVED, "entonces" ),
( RESERVED, "fin" ),
( SEPARATOR, ";" ),
( SEPARATOR, ")" ),
( SEPARATOR, "]" ),
( SEPARATOR, "," )
)
)
{
RULE ( disyuncion , d )();
{
THIS.nombre = d.nombre;
THIS.tipo = d.tipo;
THIS.gfalse = d.gfalse;
THIS.gtrue = d.gtrue;
THIS.literal = d.literal;
}
}
DEFINE_RULE(disyuncion,
FIRST(
( RESERVED, "not" ),
( OPERATOR, "-" ),
( IDENTIFIER ),
( INTEGER ),
( REAL ),
( RESERVED, "true" ),