Implemented PHP::Loop::While and PHP::Generator#process_while.

Author: artob

lib/php/generator.rb

@@ -429,6 +429,18 @@ def process_for(exp)
       Loop::ForEach.new(process(exp.shift), process(exp.shift), process(exp.shift))
     end
 
+    ##
+    # Processes `[:while, condition, block]` expressions.
+    #
+    # @example
+    #   process([:while, [:true], [:call, nil, :puts, [:arglist, [:str, "looping..."]]], true])
+    #
+    # @param  [Array(Array, Array, Boolean)] exp
+    # @return [Loop::While]
+    def process_while(exp)
+      Loop::While.new(process(exp.shift), process(exp.shift))
+    end
+
     ##
     # Processes `[:not, operand]` expressions.
     #

lib/php/syntax/loop.rb

@@ -2,6 +2,31 @@ module PHP
   ##
   # @see http://php.net/manual/en/language.control-structures.php
   class Loop < Expression
+    ##
+    # @see http://php.net/manual/en/control-structures.while.php
+    class While < Loop
+      ##
+      # @return [Expression]
+      attr_accessor :condition
+
+      ##
+      # @param  [Expression]   condition
+      # @param  [Array<Block>] body
+      def initialize(condition, *body)
+        @condition = condition
+        @children  = body.map { |exp| Block.for(exp) }
+      end
+
+      ##
+      # Returns the PHP representation of this `while` loop.
+      #
+      # @return [String]
+      def to_php
+        body = children.map(&:to_php).join('; ')
+        "while (#{condition}) { #{body} }" # FIXME
+      end
+    end
+
     ##
     # @see http://php.net/manual/en/control-structures.foreach.php
     class ForEach < Loop