com.sonar.sslr.impl.matcher

Class RuleDefinition

java.lang.Object

com.sonar.sslr.impl.matcher.RuleDefinition

All Implemented Interfaces:

AstNodeSkippingPolicy, AstNodeType, Rule, GrammarRuleKey, Matcher, CompilableGrammarRule, MemoParsingExpression, ParsingExpression

public class RuleDefinition
extends Object
implements Rule, AstNodeSkippingPolicy, GrammarRuleKey, CompilableGrammarRule, MemoParsingExpression

This class is not intended to be instantiated or subclassed by clients.

Constructor Summary

Constructors

Constructor and Description
RuleDefinition(GrammarRuleKey ruleKey)
RuleDefinition(String name)

Method Summary

Modifier and Type	Method and Description
Instruction[]	compile(CompilationHandler compiler) Compiles this expression into a sequence of instructions.
void	enableMemoization()
ParsingExpression	getExpression()
String	getName()
AstNodeType	getRealAstNodeType()
GrammarRuleKey	getRuleKey()
boolean	hasToBeSkippedFromAst(AstNode node) Some AstNode can be pretty useless and makes a global AST less readable.
RuleDefinition	is(Object... e) Allows to provide definition of a grammar rule.
void	mock() Utility method used for unit testing in order to dynamically replace the definition of the rule to match as soon as a token whose value equals the name of the rule is encountered.
RuleDefinition	override(Object... e) Allows to override definition of a grammar rule.
void	recoveryRule()
void	setExpression(ParsingExpression expression)
boolean	shouldMemoize()
void	skip() Indicates that grammar rule should not lead to creation of AST node - its children should be attached directly to its parent.
void	skipIf(AstNodeSkippingPolicy astNodeSkipPolicy) Defines policy of creation of AST node for this rule.
void	skipIfOneChild() Indicates that grammar rule should not lead to creation of AST node if it has exactly one child.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

RuleDefinition

public RuleDefinition(String name)

RuleDefinition

public RuleDefinition(GrammarRuleKey ruleKey)

Method Detail

getName

public String getName()

is

public RuleDefinition is(Object... e)

Description copied from interface: Rule

Allows to provide definition of a grammar rule.

Note: this method can be called only once for a rule. If it is called more than once, an IllegalStateException will be thrown.

Specified by:

is in interface Rule

Parameters:

e - expression of grammar that defines this rule

Returns:

this (for method chaining)

override

public RuleDefinition override(Object... e)

Description copied from interface: Rule

Allows to override definition of a grammar rule.

This method has the same effect as #is(Object), except that it can be called more than once to redefine a rule from scratch.

Specified by:

override in interface Rule

Parameters:

e - expression of grammar that defines this rule

Returns:

this (for method chaining)

mock

public void mock()

Description copied from interface: Rule

Utility method used for unit testing in order to dynamically replace the definition of the rule to match as soon as a token whose value equals the name of the rule is encountered.

Specified by:

mock in interface Rule

skip

public void skip()

Description copied from interface: Rule

Indicates that grammar rule should not lead to creation of AST node - its children should be attached directly to its parent.

Specified by:

skip in interface Rule

skipIf

public void skipIf(AstNodeSkippingPolicy astNodeSkipPolicy)

Description copied from interface: Rule

Defines policy of creation of AST node for this rule.

Specified by:

skipIf in interface Rule

skipIfOneChild

public void skipIfOneChild()

Description copied from interface: Rule

Indicates that grammar rule should not lead to creation of AST node if it has exactly one child.

Specified by:

skipIfOneChild in interface Rule

recoveryRule

public void recoveryRule()

Specified by:

recoveryRule in interface Rule

hasToBeSkippedFromAst

public boolean hasToBeSkippedFromAst(AstNode node)

Description copied from interface: AstNodeSkippingPolicy

Some AstNode can be pretty useless and makes a global AST less readable. This method allows to automatically remove those AstNode from the AST.

Specified by:

hasToBeSkippedFromAst in interface AstNodeSkippingPolicy

Parameters:

node - the node that should or not be removed from the AST

Returns:

true if AstNode with this type must be skipped from the AST.

getRealAstNodeType

public AstNodeType getRealAstNodeType()

Since:

1.18

getRuleKey

public GrammarRuleKey getRuleKey()

Specified by:

getRuleKey in interface CompilableGrammarRule

getExpression

public ParsingExpression getExpression()

Specified by:

getExpression in interface CompilableGrammarRule

setExpression

public void setExpression(ParsingExpression expression)

Specified by:

setExpression in interface CompilableGrammarRule

compile

public Instruction[] compile(CompilationHandler compiler)

Description copied from interface: ParsingExpression

Compiles this expression into a sequence of instructions.

Specified by:

compile in interface ParsingExpression

toString

public String toString()

Overrides:

toString in class Object

shouldMemoize

public boolean shouldMemoize()

Specified by:

shouldMemoize in interface MemoParsingExpression

enableMemoization

public void enableMemoization()