pegmatite::ASTParserDelegate Class Reference

A parser delegate that is responsible for creating AST nodes from the input. More...

#include <ast.hh>

Inheritance diagram for pegmatite::ASTParserDelegate:

Public Member Functions
	ASTParserDelegate ()
	Default constructor, registers this class in thread-local storage so that it can be referenced by BindAST fields in subclasses when their constructors are run.
virtual parse_proc	get_parse_proc (const Rule &) const
	Returns the handler for the specified rule.
template<class T >
bool	parse (Input &i, const Rule &g, const Rule &ws, ErrorReporter err, std::unique_ptr< T > &ast) const
	Parse an input i, starting from rule g in the grammar for which this is a delegate. More...

Protected Member Functions
void	set_parse_proc (const Rule &r, parse_proc p)
	Registers a callback in this delegate.

Static Protected Member Functions
static void	bind_parse_proc (const Rule &r, parse_proc p)
	Registers a callback for a specific rule in the instance of this class currently under construction in this thread.

Friends
template<class T >
class	BindAST
	BindAST is a friend so that it can call the set_parse_proc() function, which should never be called from anything else.

Detailed Description

A parser delegate that is responsible for creating AST nodes from the input.

This class manages a mapping from rules in some grammar to AST nodes. Instances of the BindAST class that are fields of a subclass of this will automatically register rules on creation.

The recommended use for this class is to only register rules on construction (either explicitly in the constructor or implicitly via BindAST members). This will give a completely reentrant delegate, which can be used by multiple threads to parse multiple inputs safely.

Member Function Documentation

template<class T >

bool pegmatite::ASTParserDelegate::parse ( Input &  i, const Rule &  g, const Rule &  ws, ErrorReporter  err, std::unique_ptr< T > &  ast  ) const

inline

Parse an input i, starting from rule g in the grammar for which this is a delegate.

The rule ws is used as whitespace. Errors are returned via the el parameter and the root of the AST via the ast parameter.

This function returns true on a successful parse, or false otherwise.

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The documentation for this class was generated from the following file:

• /Users/theraven/Documents/Work/Teaching/Compilers ACS Module/Coursework/Resources/Pegmatite/ast.hh