add \INPUT & \OUTPUT (alternatives to \REQUIRE & \ENSURE)

Author: ZJUGuoShuai

README.md

@@ -110,6 +110,10 @@ Commands for typesetting algorithms must be enclosed in an `algorithmic` environ
 \REQUIRE <text>
 # A postcondition is optional
 \ENSURE <text>
+# An input is optional
+\INPUT <text>
+# An output is optional
+\OUTPUT <text>
 # The body of your code is a <block>
 \STATE ...
 \end{algorithmic}

src/Parser.js

@@ -353,7 +353,7 @@ Parser.prototype._parseRepeat = function() {
     return repeatNode;
 };
 
-var INPUTS_OUTPUTS_COMMANDS = ['ensure', 'require'];
+var INPUTS_OUTPUTS_COMMANDS = ['ensure', 'require', 'input', 'output'];
 var STATEMENT_COMMANDS = ['state', 'print', 'return'];
 Parser.prototype._parseCommand = function(acceptCommands) {
     if (!this._lexer.accept('func', acceptCommands)) return null;

src/Renderer.js

@@ -770,6 +770,8 @@ Renderer.prototype._buildTree = function(node) {
                 'state': '',
                 'ensure': 'Ensure: ',
                 'require': 'Require: ',
+                'input': 'Input: ',
+                'output': 'Output: ',
                 'print': 'print ',
                 'return': 'return ',
             }[cmdName];

static/samples.html.template

@@ -19,6 +19,10 @@
         \begin{algorithm}
         \caption{Test text-style}
         \begin{algorithmic}
+        \REQUIRE some preconditions
+        \ENSURE some postconditions
+        \INPUT some inputs
+        \OUTPUT some outputs
         \PROCEDURE{Test-Declarations}{}
             \STATE font families: {\sffamily sffamily, \ttfamily ttfamily, \normalfont normalfont, \rmfamily rmfamily.}
             \STATE font weights: {normal weight, \bfseries bold, \mdseries