Merge pull request #3 from romildo/maven

Integrates CUP and JFlex

.gitignore

@@ -10,3 +10,13 @@
 
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
+
+# dependency reduced pom.xml
+dependency-reduced-pom.xml
+
+# target
+target/*
+
+# backup files
+*~
+

pom.xml

@@ -10,5 +10,88 @@
   <packaging>jar</packaging>
 
   <name>EPlan compiler</name>
-  <url>http://maven.apache.org</url>
+  <url>https://github.com/romildo/eplan</url>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <maven.compiler.source>1.8</maven.compiler.source>
+    <maven.compiler.target>1.8</maven.compiler.target>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>com.github.vbmacher</groupId>
+      <artifactId>java-cup-runtime</artifactId>
+      <version>11b-20160615</version>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>de.jflex</groupId>
+        <artifactId>jflex-maven-plugin</artifactId>
+        <version>1.6.1</version>
+        <executions>
+          <execution>
+            <goals>
+              <goal>generate</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+
+      <plugin>
+        <groupId>com.github.vbmacher</groupId>
+        <artifactId>cup-maven-plugin</artifactId>
+        <version>11b-20160615</version>
+        <executions>
+          <execution>
+            <goals>
+              <goal>generate</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jar-plugin</artifactId>
+        <version>3.0.2</version>
+        <configuration>
+          <archive>
+            <manifest>
+              <mainClass>main.LexerDriver</mainClass>
+            </manifest>
+          </archive>
+        </configuration>
+      </plugin>
+
+      <plugin>
+	<groupId>org.apache.maven.plugins</groupId>
+	<artifactId>maven-shade-plugin</artifactId>
+        <version>2.4.3</version>
+	<executions>
+	  <execution>
+	    <phase>package</phase>
+	    <goals>
+	      <goal>shade</goal>
+	    </goals>
+            <configuration>
+              <transformers>
+                <!-- add Main-Class to manifest file -->
+                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                  <mainClass>main.LexerDriver</mainClass>
+                </transformer>
+              </transformers>
+            </configuration>
+	  </execution>
+	</executions>
+	<configuration>
+	  <finalName>uber-${project.artifactId}-${project.version}</finalName>
+	</configuration>
+      </plugin>
+    </plugins>
+  </build>
+
 </project>

src/main/cup/parser.cup

@@ -0,0 +1,12 @@
+package parse;
+
+terminal LITINT;
+terminal PLUS, MINUS, TIMES, DIV;
+terminal LPAREN, RPAREN;
+
+non terminal exp;
+
+start with exp;
+
+exp ::=
+;

src/main/java/LexerDriver.java → src/main/java/main/LexerDriver.java

@@ -1,16 +1,22 @@
+package main;
+
 import java.io.InputStreamReader;
 import java.io.Reader;
+import java_cup.runtime.Symbol;
+
+import parse.Yylex;
+import parse.sym;
 
 public class LexerDriver {
 
   public static void main(String[] args) throws Exception {
     Reader input = new InputStreamReader(System.in);
     Yylex lexer = new Yylex(input);
-    int tok;
+    Symbol tok;
     do {
-      tok = lexer.yylex();
+      tok = lexer.next_token();
       System.out.println(tok);
-    } while (tok != lexer.YYEOF);
+    } while (tok.sym != sym.EOF );
   }
 
 }

src/main/jflex/lexer.jflex

@@ -1,21 +1,23 @@
+package parse;
+
+import java_cup.runtime.Symbol;
 
 %%
 
 %public
-%integer
+%cup
 
 %%
 
 [ \t\f\n\r]+         { /* skip */ }
 
-[0-9]+ ("." [0-9]+)? { return 10; }
-
-"+"                  { return 21; }
-"-"                  { return 22; }
-"*"                  { return 23; }
-"/"                  { return 24; }
+[0-9]+ ("." [0-9]+)? { return new Symbol(sym.LITINT, yytext()); }
 
-"("                  { return 31; }
-")"                  { return 32; }
+"+"                  { return new Symbol(sym.PLUS); }
+"-"                  { return new Symbol(sym.MINUS); }
+"*"                  { return new Symbol(sym.TIMES); }
+"/"                  { return new Symbol(sym.DIV); }
+"("                  { return new Symbol(sym.LPAREN); }
+")"                  { return new Symbol(sym.RPAREN); }
 
 .                    { System.out.printf("unexpected char |%s|\n", yytext()); }

tests/test-lexer-01.eplan

@@ -0,0 +1 @@
+12 * (453.2 - 140.3) / 2