Grammatica 1.4 Documentation: ProductionPattern

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Grammatica 1.4 Documentation

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PerCederberg.Grammatica.Parser
Class ProductionPattern

System.Object
   |
   +--ProductionPattern

in ProductionPattern.cs

class ProductionPattern
extends System.Object

A production pattern. This class represents a set of production alternatives that together forms a single production. A production pattern is identified by an integer id and a name, both provided upon creation. The pattern id is used for referencing the production pattern from production pattern elements.

Constructor Summary
`ProductionPattern( int id, string name )` Creates a new production pattern.

Method Summary
`void`	`AddAlternative( ProductionPatternAlternative alt )` Adds a production pattern alternative.
`ProductionPatternAlternative`	`GetAlternative( int pos )` Returns an alternative in this pattern.
`int`	`GetAlternativeCount()` Returns the number of alternatives in this pattern.
`internal ProductionPatternAlternative`	`GetDefaultAlternative()` Returns the default pattern alternative.
`int`	`GetId()` Returns the unique production pattern identity value.
`internal LookAheadSet`	`GetLookAhead()` Returns the look-ahead set associated with this alternative.
`string`	`GetName()` Returns the production pattern name.
`bool`	`IsLeftRecursive()` Checks if this pattern is recursive on the left-hand side.
`bool`	`IsMatchingEmpty()` Checks if this pattern would match an empty stream of tokens.
`bool`	`IsRightRecursive()` Checks if this pattern is recursive on the right-hand side.
`bool`	`IsSyntetic()` Checks if the syntetic production flag is set.
`internal void`	`SetDefaultAlternative( int pos )` Sets the default pattern alternative.
`internal void`	`SetLookAhead( LookAheadSet lookAhead )` Sets the look-ahead set for this alternative.
`void`	`SetSyntetic( bool syntetic )` Sets the syntetic production pattern flag.
`override string`	`ToString()` Returns a string representation of this object.

Constructor Detail

ProductionPattern

public ProductionPattern( int id, string name );

Creates a new production pattern.

Method Detail

AddAlternative

public void AddAlternative( ProductionPatternAlternative alt );

Adds a production pattern alternative.

GetAlternative

public ProductionPatternAlternative GetAlternative( int pos );

Returns an alternative in this pattern.

GetAlternativeCount

public int GetAlternativeCount();

Returns the number of alternatives in this pattern.

GetDefaultAlternative

 internal ProductionPatternAlternative GetDefaultAlternative();

Returns the default pattern alternative. The default alternative is used when no other alternative matches.

GetId

public int GetId();

Returns the unique production pattern identity value.

GetLookAhead

 internal LookAheadSet GetLookAhead();

Returns the look-ahead set associated with this alternative.

GetName

public string GetName();

Returns the production pattern name.

IsLeftRecursive

public bool IsLeftRecursive();

Checks if this pattern is recursive on the left-hand side. This method checks if any of the production pattern alternatives is left-recursive.

IsMatchingEmpty

public bool IsMatchingEmpty();

Checks if this pattern would match an empty stream of tokens. This method checks if any one of the production pattern alternatives would match the empty token stream.

IsRightRecursive

public bool IsRightRecursive();

Checks if this pattern is recursive on the right-hand side. This method checks if any of the production pattern alternatives is right-recursive.

IsSyntetic

public bool IsSyntetic();

Checks if the syntetic production flag is set. If this flag is set, the production identified by this pattern has been artificially inserted into the grammar. No parse tree nodes will be created for such nodes, instead the child nodes will be added directly to the parent node.

SetDefaultAlternative

 internal void SetDefaultAlternative( int pos );

Sets the default pattern alternative. The default alternative is used when no other alternative matches.

SetLookAhead

 internal void SetLookAhead( LookAheadSet lookAhead );

Sets the look-ahead set for this alternative.

SetSyntetic

public void SetSyntetic( bool syntetic );

Sets the syntetic production pattern flag. If this flag is set, the production identified by this pattern has been artificially inserted into the grammar. By default this flag is set to false.

ToString

public override string ToString();

Returns a string representation of this object.