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java.lang.Objectcom.puppycrawl.tools.checkstyle.api.AutomaticBean
com.puppycrawl.tools.checkstyle.api.AbstractViolationReporter
com.puppycrawl.tools.checkstyle.api.Check
com.puppycrawl.tools.checkstyle.checks.coding.UnnecessaryParenthesesCheck
public class UnnecessaryParenthesesCheck
Checks if unnecessary parentheses are used in a statement or expression. The check will flag the following with warnings:
return (x); // parens around identifier
return (x + 1); // parens around return value
int x = (y / 2 + 1); // parens around assignment rhs
for (int i = (0); i < 10; i++) { // parens around literal
t -= (z + 1); // parens around assignment rhs
The check is not "type aware", that is to say, it can't tell if parentheses are unnecessary based on the types in an expression. It also doesn't know about operator precedence and associatvity; therefore it won't catch something like
int x = (a + b) + c;
In the above case, given that a, b, and c are
all int variables, the parentheses around a + b
are not needed.
| Constructor Summary | |
|---|---|
UnnecessaryParenthesesCheck()
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| Method Summary | |
|---|---|
int[] |
getDefaultTokens()
Returns the default token a check is interested in. |
void |
leaveToken(DetailAST aAST)
Called after all the child nodes have been process. |
void |
visitToken(DetailAST aAST)
Called to process a token. |
| Methods inherited from class com.puppycrawl.tools.checkstyle.api.Check |
|---|
beginTree, destroy, finishTree, getAcceptableTokens, getClassLoader, getFileContents, getLines, getRequiredTokens, getTabWidth, getTokenNames, init, log, log, setClassLoader, setFileContents, setMessages, setTabWidth, setTokens |
| Methods inherited from class com.puppycrawl.tools.checkstyle.api.AbstractViolationReporter |
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getCustomMessages, getId, getMessageBundle, getSeverity, getSeverityLevel, log, setId, setSeverity |
| Methods inherited from class com.puppycrawl.tools.checkstyle.api.AutomaticBean |
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configure, contextualize, finishLocalSetup, getConfiguration, setupChild |
| Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
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public UnnecessaryParenthesesCheck()
| Method Detail |
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public int[] getDefaultTokens()
Check
getDefaultTokens in class CheckTokenTypespublic void visitToken(DetailAST aAST)
Check
visitToken in class CheckaAST - the token to processpublic void leaveToken(DetailAST aAST)
Check
leaveToken in class CheckaAST - the token leaving
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