com.google.javascript.jscomp.lint

Class CheckPrimitiveAsObject

java.lang.Object

com.google.javascript.jscomp.NodeTraversal.AbstractPostOrderCallback

com.google.javascript.jscomp.lint.CheckPrimitiveAsObject

All Implemented Interfaces:

CompilerPass, HotSwapCompilerPass, NodeTraversal.Callback

public final class CheckPrimitiveAsObject
extends NodeTraversal.AbstractPostOrderCallback
implements HotSwapCompilerPass

Check for explicit creation of the object equivalents of primitive types (e.g. Boolean instead of boolean) and their use in type declarations.

Using these is confusing and gives no benefit. For example, the result of typeof (new Boolean(true)) is "object". and the result of (new Boolean(false)) ? "true" : "false" is "true".

Field Summary

Fields

Modifier and Type	Field and Description
static DiagnosticType	NEW_PRIMITIVE_OBJECT
static DiagnosticType	PRIMITIVE_OBJECT_DECLARATION

Constructor Summary

Constructors

Constructor and Description
CheckPrimitiveAsObject(AbstractCompiler compiler)

Method Summary

Modifier and Type	Method and Description
void	hotSwapScript(Node scriptRoot, Node originalRoot) Process the JS with root node root.
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 have been visited).

Methods inherited from class com.google.javascript.jscomp.NodeTraversal.AbstractPostOrderCallback

shouldTraverse

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NEW_PRIMITIVE_OBJECT

public static final DiagnosticType NEW_PRIMITIVE_OBJECT

PRIMITIVE_OBJECT_DECLARATION

public static final DiagnosticType PRIMITIVE_OBJECT_DECLARATION

Constructor Detail

CheckPrimitiveAsObject

public CheckPrimitiveAsObject(AbstractCompiler compiler)

Method Detail

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 interface CompilerPass

Parameters:

externs - Top of external JS tree

root - Top of JS tree

hotSwapScript

public void hotSwapScript(Node scriptRoot,
                          Node originalRoot)

Description copied from interface: HotSwapCompilerPass

Process the JS with root node root. This is supposed to be significantly faster compared to corresponding full-compiler passes.

Specified by:

hotSwapScript in interface HotSwapCompilerPass

Parameters:

scriptRoot - Root node corresponding to the file that is modified, should be of type Token.SCRIPT.

originalRoot - Root node corresponding to the original version of the file that is modified. Should be of type token.SCRIPT.

visit

public void visit(NodeTraversal t,
                  Node n,
                  Node parent)

Description copied from interface: NodeTraversal.Callback

Visits a node in postorder (after its children have been visited). A node is visited only if all its parents should be traversed (NodeTraversal.Callback.shouldTraverse(NodeTraversal, Node, Node)).

Implementations can have side effects (e.g. modifying the parse tree).

Specified by:

visit in interface NodeTraversal.Callback