Add parser support for block params

lib/handlebars/compiler/ast.js

@@ -9,10 +9,11 @@ function LocationInfo(locInfo) {
 }
 
 var AST = {
-  ProgramNode: function(statements, strip, locInfo) {
+  ProgramNode: function(statements, blockParams, strip, locInfo) {
     LocationInfo.call(this, locInfo);
     this.type = "program";
     this.statements = statements;
+    this.blockParams = blockParams;
     this.strip = strip;
   },
 

lib/handlebars/compiler/helpers.js

@@ -23,7 +23,7 @@ export function prepareRawBlock(openRawBlock, content, close, locInfo) {
     throw new Exception(openRawBlock.sexpr.id.original + " doesn't match " + close, errorNode);
   }
 
-  var program = new this.ProgramNode([content], {}, locInfo);
+  var program = new this.ProgramNode([content], null, {}, locInfo);
 
   return new this.BlockNode(openRawBlock.sexpr, program, undefined, undefined, locInfo);
 }
@@ -40,6 +40,8 @@ export function prepareBlock(openBlock, program, inverseAndProgram, close, inver
     throw new Exception(openBlock.sexpr.id.original + ' doesn\'t match ' + close.path.original, errorNode);
   }
 
+  program.blockParams = openBlock.blockParams;
+
   // Safely handle a chained inverse that does not have a non-conditional inverse
   // (i.e. both inverseAndProgram AND close are undefined)
   if (!close) {

lib/handlebars/compiler/printer.js

@@ -26,6 +26,15 @@ PrintVisitor.prototype.program = function(program) {
       statements = program.statements,
       i, l;
 
+  if (program.blockParams) {
+    var blockParams = "BLOCK PARAMS: [";
+    for(i=0, l=program.blockParams.length; i<l; i++) {
+       blockParams += " " + program.blockParams[i];
+    }
+    blockParams += " ]";
+    out += this.pad(blockParams);
+  }
+
   for(i=0, l=statements.length; i<l; i++) {
     out = out + this.accept(statements[i]);
   }