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<div class="subTitle">com.google.javascript.jscomp.type</div>
<h2 title="Interface FlowScope" class="title">Interface FlowScope</h2>
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<dl>
<dt>All Superinterfaces:</dt>
<dd><a href="../../../../../com/google/javascript/jscomp/graph/LatticeElement.html" title="interface in com.google.javascript.jscomp.graph">LatticeElement</a>, <a href="../../../../../com/google/javascript/rhino/jstype/StaticScope.html" title="interface in com.google.javascript.rhino.jstype">StaticScope</a><<a href="../../../../../com/google/javascript/rhino/jstype/JSType.html" title="class in com.google.javascript.rhino.jstype">JSType</a>></dd>
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<pre>public interface <span class="strong">FlowScope</span>
extends <a href="../../../../../com/google/javascript/rhino/jstype/StaticScope.html" title="interface in com.google.javascript.rhino.jstype">StaticScope</a><<a href="../../../../../com/google/javascript/rhino/jstype/JSType.html" title="class in com.google.javascript.rhino.jstype">JSType</a>>, <a href="../../../../../com/google/javascript/jscomp/graph/LatticeElement.html" title="interface in com.google.javascript.jscomp.graph">LatticeElement</a></pre>
<div class="block">A symbol table for inferring types during data flow analysis.
Each flow scope represents the types of all variables in the scope at
a particular point in the flow analysis.</div>
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<h3>Method Summary</h3>
<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
<caption><span>Methods</span><span class="tabEnd"> </span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../com/google/javascript/jscomp/type/FlowScope.html#completeScope(com.google.javascript.rhino.jstype.StaticScope)">completeScope</a></strong>(<a href="../../../../../com/google/javascript/rhino/jstype/StaticScope.html" title="interface in com.google.javascript.rhino.jstype">StaticScope</a><<a href="../../../../../com/google/javascript/rhino/jstype/JSType.html" title="class in com.google.javascript.rhino.jstype">JSType</a>> scope)</code>
<div class="block">Look through the given scope, and try to find slots where it doesn't
have enough type information.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../com/google/javascript/jscomp/type/FlowScope.html" title="interface in com.google.javascript.jscomp.type">FlowScope</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../com/google/javascript/jscomp/type/FlowScope.html#createChildFlowScope()">createChildFlowScope</a></strong>()</code>
<div class="block">Creates a child of this flow scope, to represent an instruction
directly following this one.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../com/google/javascript/rhino/jstype/StaticSlot.html" title="interface in com.google.javascript.rhino.jstype">StaticSlot</a><<a href="../../../../../com/google/javascript/rhino/jstype/JSType.html" title="class in com.google.javascript.rhino.jstype">JSType</a>></code></td>
<td class="colLast"><code><strong><a href="../../../../../com/google/javascript/jscomp/type/FlowScope.html#findUniqueRefinedSlot(com.google.javascript.jscomp.type.FlowScope)">findUniqueRefinedSlot</a></strong>(<a href="../../../../../com/google/javascript/jscomp/type/FlowScope.html" title="interface in com.google.javascript.jscomp.type">FlowScope</a> blindScope)</code>
<div class="block">Tries to find a unique refined variable in the refined scope, up to the
the blind scope.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../com/google/javascript/jscomp/type/FlowScope.html#inferQualifiedSlot(com.google.javascript.rhino.Node,%20java.lang.String,%20com.google.javascript.rhino.jstype.JSType,%20com.google.javascript.rhino.jstype.JSType)">inferQualifiedSlot</a></strong>(<a href="../../../../../com/google/javascript/rhino/Node.html" title="class in com.google.javascript.rhino">Node</a> node,
java.lang.String symbol,
<a href="../../../../../com/google/javascript/rhino/jstype/JSType.html" title="class in com.google.javascript.rhino.jstype">JSType</a> bottomType,
<a href="../../../../../com/google/javascript/rhino/jstype/JSType.html" title="class in com.google.javascript.rhino.jstype">JSType</a> inferredType)</code>
<div class="block">Infer the type of a qualified name.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../com/google/javascript/jscomp/type/FlowScope.html#inferSlotType(java.lang.String,%20com.google.javascript.rhino.jstype.JSType)">inferSlotType</a></strong>(java.lang.String symbol,
<a href="../../../../../com/google/javascript/rhino/jstype/JSType.html" title="class in com.google.javascript.rhino.jstype">JSType</a> type)</code>
<div class="block">Defines the type of a symbol at this point in the flow.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../com/google/javascript/jscomp/type/FlowScope.html" title="interface in com.google.javascript.jscomp.type">FlowScope</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../com/google/javascript/jscomp/type/FlowScope.html#optimize()">optimize</a></strong>()</code>
<div class="block">Optimize this scope and return a new FlowScope with faster lookup.</div>
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<h3>Methods inherited from interface com.google.javascript.rhino.jstype.<a href="../../../../../com/google/javascript/rhino/jstype/StaticScope.html" title="interface in com.google.javascript.rhino.jstype">StaticScope</a></h3>
<code><a href="../../../../../com/google/javascript/rhino/jstype/StaticScope.html#getOwnSlot(java.lang.String)">getOwnSlot</a>, <a href="../../../../../com/google/javascript/rhino/jstype/StaticScope.html#getParentScope()">getParentScope</a>, <a href="../../../../../com/google/javascript/rhino/jstype/StaticScope.html#getRootNode()">getRootNode</a>, <a href="../../../../../com/google/javascript/rhino/jstype/StaticScope.html#getSlot(java.lang.String)">getSlot</a>, <a href="../../../../../com/google/javascript/rhino/jstype/StaticScope.html#getTypeOfThis()">getTypeOfThis</a></code></li>
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<h3>Method Detail</h3>
<a name="createChildFlowScope()">
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<h4>createChildFlowScope</h4>
<pre><a href="../../../../../com/google/javascript/jscomp/type/FlowScope.html" title="interface in com.google.javascript.jscomp.type">FlowScope</a> createChildFlowScope()</pre>
<div class="block">Creates a child of this flow scope, to represent an instruction
directly following this one.</div>
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<a name="inferSlotType(java.lang.String, com.google.javascript.rhino.jstype.JSType)">
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<h4>inferSlotType</h4>
<pre>void inferSlotType(java.lang.String symbol,
<a href="../../../../../com/google/javascript/rhino/jstype/JSType.html" title="class in com.google.javascript.rhino.jstype">JSType</a> type)</pre>
<div class="block">Defines the type of a symbol at this point in the flow.</div>
<dl><dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - If no slot for this symbol exists.</dd></dl>
</li>
</ul>
<a name="inferQualifiedSlot(com.google.javascript.rhino.Node, java.lang.String, com.google.javascript.rhino.jstype.JSType, com.google.javascript.rhino.jstype.JSType)">
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<h4>inferQualifiedSlot</h4>
<pre>void inferQualifiedSlot(<a href="../../../../../com/google/javascript/rhino/Node.html" title="class in com.google.javascript.rhino">Node</a> node,
java.lang.String symbol,
<a href="../../../../../com/google/javascript/rhino/jstype/JSType.html" title="class in com.google.javascript.rhino.jstype">JSType</a> bottomType,
<a href="../../../../../com/google/javascript/rhino/jstype/JSType.html" title="class in com.google.javascript.rhino.jstype">JSType</a> inferredType)</pre>
<div class="block">Infer the type of a qualified name.
When traversing the control flow of a function, simple names are
declared at the bottom of the flow lattice. But there are far too many
qualified names to be able to do this and be performant. So the bottoms
of qualified names are declared lazily.
Therefore, when inferring a qualified slot, we need both the "bottom"
type of the slot when we enter the scope, and the current type being
inferred.</div>
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<a name="optimize()">
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<h4>optimize</h4>
<pre><a href="../../../../../com/google/javascript/jscomp/type/FlowScope.html" title="interface in com.google.javascript.jscomp.type">FlowScope</a> optimize()</pre>
<div class="block">Optimize this scope and return a new FlowScope with faster lookup.</div>
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<a name="findUniqueRefinedSlot(com.google.javascript.jscomp.type.FlowScope)">
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<h4>findUniqueRefinedSlot</h4>
<pre><a href="../../../../../com/google/javascript/rhino/jstype/StaticSlot.html" title="interface in com.google.javascript.rhino.jstype">StaticSlot</a><<a href="../../../../../com/google/javascript/rhino/jstype/JSType.html" title="class in com.google.javascript.rhino.jstype">JSType</a>> findUniqueRefinedSlot(<a href="../../../../../com/google/javascript/jscomp/type/FlowScope.html" title="interface in com.google.javascript.jscomp.type">FlowScope</a> blindScope)</pre>
<div class="block">Tries to find a unique refined variable in the refined scope, up to the
the blind scope.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>blindScope</code> - The scope before the refinement, i.e. some parent of the
this scope or itself.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The unique refined variable if found or null.</dd></dl>
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<a name="completeScope(com.google.javascript.rhino.jstype.StaticScope)">
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<h4>completeScope</h4>
<pre>void completeScope(<a href="../../../../../com/google/javascript/rhino/jstype/StaticScope.html" title="interface in com.google.javascript.rhino.jstype">StaticScope</a><<a href="../../../../../com/google/javascript/rhino/jstype/JSType.html" title="class in com.google.javascript.rhino.jstype">JSType</a>> scope)</pre>
<div class="block">Look through the given scope, and try to find slots where it doesn't
have enough type information. Then fill in that type information
with stuff that we've inferred in the local flow.</div>
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