//: Advanced notation for the common/easy case where a recipe takes some fixed
//: number of ingredients and yields some fixed number of products.

:(scenario recipe_with_header)
def main [
  1:number/raw <- add2 3, 5
]
def add2 x:number, y:number -> z:number [
  local-scope
  load-ingredients
  z:number <- add x, y
  return z
]
+mem: storing 8 in location 1

//: When loading recipes save any header.

:(before "End recipe Fields")
bool has_header;
vector<reagent> ingredients;
vector<reagent> products;
:(before "End recipe Constructor")
has_header = false;

:(before "End Recipe Refinements")
if (in.peek() != '[') {
  trace(9999, "parse") << "recipe has a header; parsing" << end();
  load_recipe_header(in, result);
}

:(code)
void load_recipe_header(istream& in, recipe& result) {
  result.has_header = true;
  while (has_data(in) && in.peek() != '[' && in.peek() != '\n') {
    string s = next_word(in);
    if (s == "<-")
      raise << "recipe " << result.name << " should say '->' and not '<-'\n" << end();
    if (s == "->") break;
    result.ingredients.push_back(reagent(s));
    trace(9999, "parse") << "header ingredient: " << result.ingredients.back().original_string << end();
    skip_whitespace_but_not_newline(in);
  }
  while (has_data(in) && in.peek() != '[' && in.peek() != '\n') {
    string s = next_word(in);
    result.products.push_back(reagent(s));
    trace(9999, "parse") << "header product: " << result.products.back().original_string << end();
    skip_whitespace_but_not_newline(in);
  }
  // End Load Recipe Header(result)
}

:(scenario recipe_handles_stray_comma)
def main [
  1:number/raw <- add2 3, 5
]
def add2 x:number, y:number -> z:number, [
  local-scope
  load-ingredients
  z:number <- add x, y
  return z
]
+mem: storing 8 in location 1

:(scenario recipe_handles_stray_comma_2)
def main [
  foo
]
def foo, [
  1:number/raw <- add 2, 2
]
def bar [
  1:number/raw <- add 2, 3
]
+mem: storing 4 in location 1

:(scenario recipe_handles_wrong_arrow)
% Hide_errors = true;
def foo a:number <- b:number [
]
+error: recipe foo should say '->' and not '<-'

:(scenario recipe_handles_missing_bracket)
% Hide_errors = true;
def main
]
+error: main: recipe body must begin with '['

:(scenario recipe_handles_missing_bracket_2)
% Hide_errors = true;
def main
  local-scope
  {
  }
]
# doesn't overflow line when reading header
-parse: header ingredient: local-scope
+error: main: recipe body must begin with '['

:(scenario recipe_handles_missing_bracket_3)
% Hide_errors = true;
def main  # comment
  local-scope
  {
  }
]
# doesn't overflow line when reading header
-parse: header ingredient: local-scope
+error: main: recipe body must begin with '['

:(after "Begin debug_string(recipe x)")
out << "ingredients:\n";
for (int i = 0; i < SIZE(x.ingredients); ++i)
  out << "  " << debug_string(x.ingredients.at(i)) << '\n';
out << "products:\n";
for (int i = 0; i < SIZE(x.products); ++i)
  out << "  " << debug_string(x.products.at(i)) << '\n';

//: If a recipe never mentions any ingredients or products, assume it has a header.

:(scenario recipe_without_ingredients_or_products_has_header)
def test [
  1:number <- copy 34
]
+parse: recipe test has a header

:(before "End Recipe Body(result)")
if (!result.has_header) {
  result.has_header = true;
  for (int i = 0; i < SIZE(result.steps); ++i) {
    const instruction& inst = result.steps.at(i);
    if ((inst.name == "reply" && !inst.ingredients.empty())
        || (inst.name == "return" && !inst.ingredients.empty())
        || inst.name == "next-ingredient"
        || inst.name == "ingredient"
        || inst.name == "rewind-ingredients") {
      result.has_header = false;
      break;
    }
  }
}
if (result.has_header) {
  trace(9999, "parse") << "recipe " << result.name << " has a header" << end();
}

//: Rewrite 'load-ingredients' to instructions to create all reagents in the header.

:(before "End Rewrite Instruction(curr, recipe result)")
if (curr.name == "load-ingredients") {
  curr.clear();
  recipe_ordinal op = get(Recipe_ordinal, "next-ingredient-without-typechecking");
  for (int i = pre { line-height: 125%; }
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html><head><title>Python: module ranger.gui.widgets.titlebar</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head><body bgcolor="#f0f0f8">

<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="heading">
<tr bgcolor="#7799ee">
<td valign=bottom>&nbsp;<br>
<font color="#ffffff" face="helvetica, arial">&nbsp;<br><big><big><strong><a href="ranger.html"><font color="#ffffff">ranger</font></a>.<a href="ranger.gui.html"><font color="#ffffff">gui</font></a>.<a href="ranger.gui.widgets.html"><font color="#ffffff">widgets</font></a>.titlebar</strong></big></big></font></td
><td align=right valign=bottom
><font color="#ffffff" face="helvetica, arial"><a href=".">index</a><br><a href="file:/home/hut/work/ranger/ranger/gui/widgets/titlebar.py">/home/hut/work/ranger/ranger/gui/widgets/titlebar.py</a></font></td></tr></table>
    <p><tt>The&nbsp;<a href="#TitleBar">TitleBar</a>&nbsp;widget&nbsp;displays&nbsp;the&nbsp;current&nbsp;path&nbsp;and&nbsp;some&nbsp;other&nbsp;useful<br>
information.</tt></p>
<p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ee77aa">
<td colspan=3 valign=bottom>&nbsp;<br>
<font color="#ffffff" face="helvetica, arial"><big><strong>Classes</strong></big></font></td></tr>
    
<tr><td bgcolor="#ee77aa"><tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</tt></td><td>&nbsp;</td>
<td width="100%"><dl>
<dt><font face="helvetica, arial"><a href="builtins.html#list">builtins.list</a>(<a href="builtins.html#object">builtins.object</a>)
</font></dt><dd>
<dl>
<dt><font face="helvetica, arial"><a href="ranger.gui.widgets.titlebar.html#BarSide">BarSide</a>
</font></dt></dl>
</dd>
<dt><font face="helvetica, arial"><a href="builtins.html#object">builtins.object</a>
</font></dt><dd>
<dl>
<dt><font face="helvetica, arial"><a href="ranger.gui.widgets.titlebar.html#Bar">Bar</a>
</font></dt><dt><font face="helvetica, arial"><a href="ranger.gui.widgets.titlebar.html#ColoredString">ColoredString</a>
</font></dt></dl>
</dd>
<dt><font face="helvetica, arial"><a href="ranger.gui.widgets.html#Widget">ranger.gui.widgets.Widget</a>(<a href="ranger.gui.displayable.html#Displayable">ranger.gui.displayable.Displayable</a>)
</font></dt><dd>
<dl>
<dt><font face="helvetica, arial"><a href="ranger.gui.widgets.titlebar.html#TitleBar">TitleBar</a>
</font></dt></dl>
</dd>
</dl>
 <p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ffc8d8">
<td colspan=3 valign=bottom>&nbsp;<br>
<font color="#000000" face="helvetica, arial"><a name="Bar">class <strong>Bar</strong></a>(<a href="builtins.html#object">builtins.object</a>)</font></td></tr>
    
<tr><td bgcolor="#ffc8d8"><tt>&nbsp;&nbsp;&nbsp;</tt></td><td>&nbsp;</td>
<td width="100%">Methods defined here:<br>
<dl><dt><a name="Bar-__init__"><strong>__init__</strong></a>(self)</dt></dl>

<dl><dt><a name="Bar-add"><strong>add</strong></a>(self, *a, **kw)</dt></dl>

<dl><dt><a name="Bar-addright"><strong>addright</strong></a>(self, *a, **kw)</dt></dl>

<dl><dt><a name="Bar-combine"><strong>combine</strong></a>(self)</dt></dl>

<dl><dt><a name="Bar-fill_gap"><strong>fill_gap</strong></a>(self, char, wid, gapwidth<font color="#909090">=False</font>)</dt></dl>

<dl><dt><a name="Bar-fixedsize"><strong>fixedsize</strong></a>(self)</dt></dl>

<dl><dt><a name="Bar-shrink_by_cutting"><strong>shrink_by_cutting</strong></a>(self, wid)</dt></dl>

<dl><dt><a name="Bar-shrink_by_removing"><strong>shrink_by_removing</strong></a>(self, wid)</dt></dl>

<dl><dt><a name="Bar-sumsize"><strong>sumsize</strong></a>(self)</dt></dl>

<hr>
Data descriptors defined here:<br>
<dl><dt><strong>__dict__</strong></dt>
<dd><tt>dictionary&nbsp;for&nbsp;instance&nbsp;variables&nbsp;(if&nbsp;defined)</tt></dd>
</dl>
<dl><dt><strong>__weakref__</strong></dt>
<dd><tt>list&nbsp;of&nbsp;weak&nbsp;references&nbsp;to&nbsp;the&nbsp;object&nbsp;(if&nbsp;defined)</tt></dd>
</dl>
<hr>
Data and other attributes defined here:<br>
<dl><dt><strong>gap</strong> = None</dl>

<dl><dt><strong>left</strong> = None</dl>

<dl><dt><strong>right</strong> = None</dl>

</td></tr></table> <p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ffc8d8">
<td colspan=3 valign=bottom>&nbsp;<br>
<font color="#000000" face="helvetica, arial"><a name="BarSide">class <strong>BarSide</strong></a>(<a href="builtins.html#list">builtins.list</a>)</font></td></tr>
    
<tr><td bgcolor="#ffc8d8"><tt>&nbsp;&nbsp;&nbsp;</tt></td><td>&nbsp;</td>
<td width="100%"><dl><dt>Method resolution order:</dt>
<dd><a href="ranger.gui.widgets.titlebar.html#BarSide">BarSide</a></dd>
<dd><a href="builtins.html#list">builtins.list</a></dd>
<dd><a href="builtins.html#object">builtins.object</a></dd>
</dl>
<hr>
Methods defined here:<br>
<dl><dt><a name="BarSide-add"><strong>add</strong></a>(self, string, *lst, **kw)</dt></dl>

<dl><dt><a name="BarSide-fixedsize"><strong>fixedsize</strong></a>(self)</dt></dl>

<dl><dt><a name="BarSide-nonfixed_items"><strong>nonfixed_items</strong></a>(self)</dt></dl>

<dl><dt><a name="BarSide-sumsize"><strong>sumsize</strong></a>(self)</dt></dl>

<hr>
Data descriptors defined here:<br>
<dl><dt><strong>__dict__</strong></dt>
<dd><tt>dictionary&nbsp;for&nbsp;instance&nbsp;variables&nbsp;(if&nbsp;defined)</tt></dd>
</dl>
<dl><dt><strong>__weakref__</strong></dt>
<dd><tt>list&nbsp;of&nbsp;weak&nbsp;references&nbsp;to&nbsp;the&nbsp;object&nbsp;(if&nbsp;defined)</tt></dd>
</dl>
<hr>
Methods inherited from <a href="builtins.html#list">builtins.list</a>:<br>
<dl><dt><a name="BarSide-__add__"><strong>__add__</strong></a>(...)</dt><dd><tt>x.<a href="#BarSide-__add__">__add__</a>(y)&nbsp;&lt;==&gt;&nbsp;x+y</tt></dd></dl>

<dl><dt><a name="BarSide-__contains__"><strong>__contains__</strong></a>(...)</dt><dd><tt>x.<a href="#BarSide-__contains__">__contains__</a>(y)&nbsp;&lt;==&gt;&nbsp;y&nbsp;in&nbsp;x</tt></dd></dl>

<dl><dt><a name="BarSide-__delitem__"><strong>__delitem__</strong></a>(...)</dt><dd><tt>x.<a href="#BarSide-__delitem__">__delitem__</a>(y)&nbsp;&lt;==&gt;&nbsp;del&nbsp;x[y]</tt></dd></dl>

<dl><dt><a name="BarSide-__eq__"><