Fixed issue 46: Array literals in GEL

git-svn-id: http://google-refine.googlecode.com/svn/trunk@833 7d457c2a-affb-35e4-300a-418c747d4874

CHANGES.txt

@@ -12,6 +12,7 @@ Fixes:
 - Issue 28: "mql-like preview is not properly unquoting numbers"
 - Issue 45: "Renaming Cells with Ctrl-Enter produced ERROR"
   Tentative fix for a concurrent bug.
+- Issue 46: "Array literals in GEL"
 
 Changes:
 - Moved unit tests from JUnit to TestNG

src/main/java/com/metaweb/gridworks/expr/functions/arrays/ArgsToArray.java

@@ -0,0 +1,25 @@
+package com.metaweb.gridworks.expr.functions.arrays;
+
+import java.util.Properties;
+
+import org.json.JSONException;
+import org.json.JSONWriter;
+
+import com.metaweb.gridworks.gel.Function;
+
+public class ArgsToArray implements Function {
+
+    public Object call(Properties bindings, Object[] args) {
+    	return args;
+    }
+
+    public void write(JSONWriter writer, Properties options)
+        throws JSONException {
+    
+        writer.object();
+        writer.key("description"); writer.value("Returns all arguments passed to it as an array");
+        writer.key("params"); writer.value("a1, a2, ...");
+        writer.key("returns"); writer.value("array");
+        writer.endObject();
+    }
+}

src/main/java/com/metaweb/gridworks/gel/Parser.java

@@ -6,6 +6,7 @@ import java.util.regex.Pattern;
 
 import com.metaweb.gridworks.expr.Evaluable;
 import com.metaweb.gridworks.expr.ParsingException;
+import com.metaweb.gridworks.expr.functions.arrays.ArgsToArray;
 import com.metaweb.gridworks.gel.Scanner.NumberToken;
 import com.metaweb.gridworks.gel.Scanner.RegexToken;
 import com.metaweb.gridworks.gel.Scanner.Token;
@@ -197,6 +198,12 @@ public class Parser {
             } else {
                 throw makeException("Missing )");
             }
+        } else if (_token.type == TokenType.Delimiter && _token.text.equals("[")) { // [ ... ] array
+        	next(true); // swallow [
+        	
+            List<Evaluable> args = parseExpressionList("]");
+
+            eval = new FunctionCallExpr(makeArray(args), new ArgsToArray());
         } else {
             throw makeException("Missing number, string, identifier, regex, or parenthesized expression");
         }