lestes::lang::cplus::lex::expander Class Reference

Macro expander. More...

#include <expander.hh>

Inheritance diagram for lestes::lang::cplus::lex::expander:

List of all members.

Public Types
enum	mode_type { NORMAL, DIRECTIVE, FILE_END }
	The modes of input. More...
Public Member Functions
ptr< token_sequence >	read_line (void)
	Reads line from input.
ptr< token_sequence >	read_expanded (void)
	Reads expanded line from input.
mode_type	mode_get (void)
	Returns input mode.
Static Public Member Functions
static ptr< expander >	create (const ptr< pp_filter > &a_input, const ptr< macro_storage > &a_macros)
	Returns new expander.
Protected Member Functions
	expander (const ptr< pp_filter > &a_input, const ptr< macro_storage > &a_macros)
	Creates new expander.
virtual void	gc_mark (void)
	Marks the object.
Private Attributes
srp< macro_storage >	macros
	The macro storage for expansion.
srp< token_stream >	stream
	The stream connected to input.

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Detailed Description

Macro expander.

Performs reading of possibly expanded lines of tokens.

Definition at line 54 of file expander.hh.

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Member Enumeration Documentation

enum lestes::lang::cplus::lex::expander::mode_type

The modes of input.

Enumerator:

NORMAL	Normal mode.
DIRECTIVE	Directive.
FILE_END	End of file.

Definition at line 57 of file expander.hh.

                     {
                //! Normal mode.
                NORMAL,
                //! Directive.
                DIRECTIVE,
                //! End of file.
                FILE_END
        } mode_type;

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Constructor & Destructor Documentation

lestes::lang::cplus::lex::expander::expander	(	const ptr< pp_filter > &	a_input,
		const ptr< macro_storage > &	a_macros
	)			[protected]

Creates new expander.

Creates new expander.

Precondition:

a_input != NULL

a_macros != NULL

Parameters:

	a_input	The input into the expander.
	a_macros	The macro storage for macro expansion.

Definition at line 54 of file expander.cc.

Referenced by create().

                                                                                   :
        macros(checked(a_macros)),
        stream(token_stream::create(checked(a_input)))
{
}

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Member Function Documentation

ptr< token_sequence > lestes::lang::cplus::lex::expander::read_line

(

void

)

Reads line from input.

Returns the next line without expansion.

Returns:

The next line.

Definition at line 83 of file expander.cc.

References stream.

{
        return stream->read_line();
}

ptr< token_sequence > lestes::lang::cplus::lex::expander::read_expanded

(

void

)

Reads expanded line from input.

Returs the next line expanded.

Returns:

The expanded line.

Definition at line 92 of file expander.cc.

References macros, and stream.

{
        ptr<token_sequence> ts = stream->expand_line(macros);
        return ts;
}

expander::mode_type lestes::lang::cplus::lex::expander::mode_get

(

void

)

Returns input mode.

Returns current mode of the input.

Returns:

The mode of input.

Definition at line 64 of file expander.cc.

References DIRECTIVE, FILE_END, NORMAL, stream, lestes::lang::cplus::lex::pp_token::TOK_HASH, and lestes::lang::cplus::lex::pp_token::TOK_TERMINATOR.

{
        ptr<pp_token> tok = stream->peek_front();

        switch (tok->type_get()) {
                case pp_token::TOK_HASH:
                        return DIRECTIVE;
                case pp_token::TOK_TERMINATOR:
                        return FILE_END;
                default:
                        break;
        }
        return NORMAL;
}

ptr< expander > lestes::lang::cplus::lex::expander::create	(	const ptr< pp_filter > &	a_input,
		const ptr< macro_storage > &	a_macros
	)			[static]

Returns new expander.

Returns new expander.

Precondition:

a_input != NULL

a_macros != NULL

Parameters:

	a_input	The input into the expander.
	a_macros	The macro storage for macro expansion.

Definition at line 105 of file expander.cc.

References expander().

{
        return new expander(a_input,a_macros);
}

void lestes::lang::cplus::lex::expander::gc_mark

(

void

)

[protected, virtual]

Marks the object.

Marks the object.

Reimplemented from lestes::std::mem::keystone.

Definition at line 113 of file expander.cc.

References macros, and stream.

{
        macros.gc_mark();
        stream.gc_mark();
        object::gc_mark();
}

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Member Data Documentation

srp<macro_storage> lestes::lang::cplus::lex::expander::macros [private]

The macro storage for expansion.

Definition at line 80 of file expander.hh.

Referenced by gc_mark(), and read_expanded().

srp<token_stream> lestes::lang::cplus::lex::expander::stream [private]

The stream connected to input.

Definition at line 82 of file expander.hh.

Referenced by gc_mark(), mode_get(), read_expanded(), and read_line().

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

• expander.hh
• expander.cc

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