Class CheckEmptyStatements
- java.lang.Object
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- com.google.javascript.jscomp.NodeTraversal.AbstractPostOrderCallback
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- com.google.javascript.jscomp.lint.CheckEmptyStatements
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- All Implemented Interfaces:
CompilerPass
,NodeTraversal.Callback
public final class CheckEmptyStatements extends NodeTraversal.AbstractPostOrderCallback implements CompilerPass
Check for empty statements (i.e. extraneous semicolons)
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Field Summary
Fields Modifier and Type Field Description static DiagnosticType
USELESS_EMPTY_STATEMENT
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Constructor Summary
Constructors Constructor Description CheckEmptyStatements(AbstractCompiler compiler)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
process(Node externs, Node root)
Process the JS with root node root.void
visit(NodeTraversal t, Node n, Node parent)
Visits a node in postorder (after its children).-
Methods inherited from class com.google.javascript.jscomp.NodeTraversal.AbstractPostOrderCallback
shouldTraverse
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Field Detail
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USELESS_EMPTY_STATEMENT
public static final DiagnosticType USELESS_EMPTY_STATEMENT
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Constructor Detail
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CheckEmptyStatements
public CheckEmptyStatements(AbstractCompiler compiler)
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Method Detail
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process
public void process(Node externs, Node root)
Description copied from interface:CompilerPass
Process the JS with root node root. Can modify the contents of each Node tree- Specified by:
process
in interfaceCompilerPass
- Parameters:
externs
- Top of external JS treeroot
- Top of JS tree
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visit
public void visit(NodeTraversal t, Node n, Node parent)
Description copied from interface:NodeTraversal.Callback
Visits a node in postorder (after its children). A node is visited in postorder iffNodeTraversal.Callback.shouldTraverse(NodeTraversal, Node, Node)
returned true for its parent. In particular, the root node is never visited in postorder.Siblings are always visited left-to-right.
Implementations can have side-effects (e.g. modify the parse tree). Removing the current node is legal, but removing or reordering nodes above the current node may cause nodes to be visited twice or not at all.
- Specified by:
visit
in interfaceNodeTraversal.Callback
- Parameters:
t
- The current traversal.n
- The current node.parent
- The parent of the current node.
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