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VocaLang

Introducción

El lenguaje que elegimos esta formado solo por vocales, números y caracteres de puntuación. Las palabras que forman parte de este lenguaje surgen de tomar solo las vocales de las palabras normales y separarlas con guiones bajos “_”.

El lenguaje está compuesto por las siguientes características:

  • Tipos de dato: {u_e_o, a_a_a}
  • Identificadores de longitud máxima de 10 caracteres.
  • Los identificadores arrancan con una letra.
  • Dos sentencias con convención de fin, apretura y cierre.
  • e_e_i [algo; cantidad].
  • o_a_e [algo].
  • Palabras reservadas: {a_a_a, u_e_o, o_a_e, e_e_i, i_i_i_o, i_a}.
  • Alfabeto = {a, e, i, o, u, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, _, [, ], ., =, ;}.

Diseño de categorías léxicas en BNF:

  <identificador> ::= <letra><resto>
  <constante> ::= <digito><constante> | <digito>
  <cadena> ::= <vocal><demas>
  <operador> ::= =
  <caracterPuntuacion> ::= . | [ | ] | ;
  <palabraReservada> ::= a_a_a | e_e_i | u_e_o | o_a_e | i_i_i_o | i_a
  <resto>::= <letra><resto> | <digito><resto> | <digito> | <letra>
  <demas>::= <letra><demas> | <letra>
  <letra>::= <vocal> | _
  <vocal> ::= a | e | i | o | u |
  <digito> ::= 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
  <simbolo>::= <letra> | <digito>

Diseño de categorías sintácticas en BNF:

<programa> ::= i_i_i_o [ <listaSentencias> ] i_a
<listaSentencias> ::= <sentencia> { <sentencia> }
<sentencia> ::= <e_e_i> | <o_a_e> | <expresion>
<e_e_i> ::= e_e_i <apertura> <cadena> ; <constante> <cierre> <fin>
<o_a_e> ::= o_a_e <apertura> <cadena> <cierre> <fin>
<expresion> ::= <u_e_o> | <a_a_a>
<u_e_o> ::= u_e_o <identificador> = <constante> <fin>
<a_a_a> ::= a_a_a <identificador> = <cadena> <fin>
<apertura> ::= [
<cierre> ::= ]
<fin> ::= .

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