From 9241bfbe3127bcd76ee7d39ffb740b215690acaf Mon Sep 17 00:00:00 2001
From: Lior Spach <ls12@inf.ufpr.br>
Date: Wed, 20 May 2015 00:22:17 -0300
Subject: [PATCH] c1
---
compiler/LexerHelper.scala | 44 ++++++++++++++++++++++++++++++++++++++
1 file changed, 44 insertions(+)
create mode 100644 compiler/LexerHelper.scala
diff --git a/compiler/LexerHelper.scala b/compiler/LexerHelper.scala
new file mode 100644
index 0000000..581fcae
--- /dev/null
+++ b/compiler/LexerHelper.scala
@@ -0,0 +1,44 @@
+
+package lexer
+
+class LexerHelper extends Definicoes {
+
+ //Acoes
+ def erro(msg: String) = { println("Erro: " + msg); sys.exit(1) }
+
+ //TAKES
+ def takeOp(input:List[Char],acc:String = ""):String = input match {
+ case Nil => acc
+ case op :: rest if ehOp(op) =>
+ takeOp(rest,acc+op)
+ case notOp :: rest if !ehOp(notOp) =>
+ acc
+ }
+ def take(input: List[Char], acc: String = ""): String = {
+ def isNotASeparatorNorOperator: Boolean = ! (ehSeparador(input.head) || ehOp(input.head))
+ input match {
+ case in :: _ if ehLetra(in) || ehNum(in) =>
+ take(input.tail, acc + in)
+ case _ =>
+ acc
+ }
+ }
+
+ //CASOS
+ def casoLetra(input: List[Char]):Token = {
+ val palavra = take(input)
+ val forwardInput = input.drop(palavra.size)
+ val valido = palavra.forall
+ { ch => ehLetra(ch) || ehNum(ch) }
+ val tipo = if (ehPalavraReservada(palavra)) "reservada" else "identificador"
+ Token(palavra, tipo)
+ }
+ def casoOp(input: List[Char]):Token = {
+ val fullOp = takeOp(input)
+ fullOp match {
+ case ":" => Token(":","dois pontos")
+ case op if operadorValido(fullOp) => Token(fullOp,"operador")
+ case _ => erro("operador invalido" + fullOp)
+ }
+ }
+}
\ No newline at end of file
--
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