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Analisador
  Léxico
 Extensível
• Introdução
• Linguagem de
  Programação
• XAJ
• Compilador
• Análise Léxica
• Polyglot
• Compilador de XAJ
• Objetivo
• Analisador Léxico Extensível
• Apêndice - Código
Introdução




 Um analisador léxico faz a identificação
 dos símbolos que pertencem a uma
 linguagem de programação.
Linguagem de Programação




 Alfabeto   formado por símbolos

 Sintaxe   definida por produções

 Compilador
XAJ




 XAJ   é uma extensão da AspectJ.
    Permite estender sua sintaxe concreta.

    Traz a unidade de compilação SyntaxClass.

    Desafio: compilador.
Compilador




   Um compilador faz tradução de uma
    linguagem de programação de alto nível para
    uma linguagem de hardware.

   É exclusivo para uma linguagem de
    programação.

   Um compilador pode ser construído utilizando
    ferramentas.

   O processo de compilação é dividido em
    etapas.
Análise Léxica




 Identifica
         padrões da linguagem num
 programa.
     Um padrão é um símbolo do alfabeto de
      uma linguagem.
Polyglot




 Ferramenta que auxilia o compilador de
  XAJ a estender sua sintaxe

 Framework


 Utiliza
        a ferramenta JFlex para gerar seu
  analisador léxico.

 Não  permite estender o alfabeto da
  linguagem – reconhecimento de novos
  símbolos.
Compilador de XAJ




 Compila   AspectJ

 Utiliza
        o Polyglot para permitir
  extensibilidade sintática

 SyntaxClass


 Problema:  as classes sintáticas podem
  trazer novos símbolos. O Polyglot não
  reconhece novos símbolos.
Objetivo




 Fazer
      o analisador léxico do Polyglot
 reconhecer símbolos novos.
Analisador Léxico Extensível




 Identificar   símbolos diferentes.

 Nomeá-los.


 Defini-los
           para a ferramenta JFlex gerar
  analisador que os reconheça.
Analisador Léxico Extensível
Contato

 torres.giorgio@gmail.com
 giorgio.torres@ufv.br

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Apresentação - Extensibilidade Léxica de Compiladores - Compilers Lexical Extensibility - Por Giorgio Torres

  • 1. Analisador Léxico Extensível • Introdução • Linguagem de Programação • XAJ • Compilador • Análise Léxica • Polyglot • Compilador de XAJ • Objetivo • Analisador Léxico Extensível • Apêndice - Código
  • 2. Introdução  Um analisador léxico faz a identificação dos símbolos que pertencem a uma linguagem de programação.
  • 3. Linguagem de Programação  Alfabeto formado por símbolos  Sintaxe definida por produções  Compilador
  • 4. XAJ  XAJ é uma extensão da AspectJ.  Permite estender sua sintaxe concreta.  Traz a unidade de compilação SyntaxClass.  Desafio: compilador.
  • 5. Compilador  Um compilador faz tradução de uma linguagem de programação de alto nível para uma linguagem de hardware.  É exclusivo para uma linguagem de programação.  Um compilador pode ser construído utilizando ferramentas.  O processo de compilação é dividido em etapas.
  • 6. Análise Léxica  Identifica padrões da linguagem num programa.  Um padrão é um símbolo do alfabeto de uma linguagem.
  • 7. Polyglot  Ferramenta que auxilia o compilador de XAJ a estender sua sintaxe  Framework  Utiliza a ferramenta JFlex para gerar seu analisador léxico.  Não permite estender o alfabeto da linguagem – reconhecimento de novos símbolos.
  • 8. Compilador de XAJ  Compila AspectJ  Utiliza o Polyglot para permitir extensibilidade sintática  SyntaxClass  Problema: as classes sintáticas podem trazer novos símbolos. O Polyglot não reconhece novos símbolos.
  • 9. Objetivo  Fazer o analisador léxico do Polyglot reconhecer símbolos novos.
  • 10. Analisador Léxico Extensível  Identificar símbolos diferentes.  Nomeá-los.  Defini-los para a ferramenta JFlex gerar analisador que os reconheça.