lestes::lang::cplus::lex::string_source Class Reference

String data source. More...

#include <string_source.hh>

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

List of all members.

Public Types
typedef lstring	string_type
	Type of string.
typedef string_type::size_type	index_type
	Type of index into the string.
Public Member Functions
ptr< ucn_token >	read (void)
	Reads one token from string.
Static Public Member Functions
static ptr< string_source >	create (const string_type &a_str)
	Returns new instance, initializes with string.
Protected Member Functions
	string_source (const string_type &a_str)
	Creates the object, initializes with string.
Private Member Functions
	string_source (const string_source &)
	Hides copy constructor.
string_source &	operator= (const string_source &)
	Hides assignment operator.
Private Attributes
string_type	str
	String to read from.
index_type	idx
	Position in string.

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Detailed Description

String data source.

Represents data source reading from host character string.

Definition at line 51 of file string_source.hh.

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Member Typedef Documentation

typedef lstring lestes::lang::cplus::lex::string_source::string_type

Type of string.

Definition at line 54 of file string_source.hh.

typedef string_type::size_type lestes::lang::cplus::lex::string_source::index_type

Type of index into the string.

Definition at line 56 of file string_source.hh.

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Constructor & Destructor Documentation

lestes::lang::cplus::lex::string_source::string_source

(

const string_type &

a_str

)

[protected]

Creates the object, initializes with string.

Creates the object, initializes with string.

Postcondition:

offset == 0

idx = = 0

Parameters:

a_str

The string with data.

Definition at line 49 of file string_source.cc.

Referenced by create().

                                                    :
        str(a_str),
        idx(0)
{
}

lestes::lang::cplus::lex::string_source::string_source

(

const string_source &

)

[private]

Hides copy constructor.

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Member Function Documentation

ptr< ucn_token > lestes::lang::cplus::lex::string_source::read

(

void

)

[virtual]

Reads one token from string.

Reads next token from string.

Returns:

The next character.

Implements lestes::lang::cplus::lex::ucn_filter.

Definition at line 59 of file string_source.cc.

References lestes::lang::cplus::lex::ucn_token::create(), idx, str, lestes::lang::cplus::lex::ucn_token::TOK_EOF, and lestes::lang::cplus::lex::ucn_token::TOK_NOT_EOF.

{
        ptr<ucn_token> t;

        if (idx >= str.length()) {
                t = ucn_token::create(ucn_token::TOK_EOF,character::create_external(0));
        } else {
                // note that the meaning of real types is not clear at this stage
                hchar c = str.at(idx);
                idx++;
                // do not interpret the encoding yet
                t = ucn_token::create(ucn_token::TOK_NOT_EOF,character::create_external(static_cast<unsigned char>(c)));
        }
  
        return t;
}

ptr< string_source > lestes::lang::cplus::lex::string_source::create

(

const string_type &

a_str

)

[static]

Returns new instance, initializes with string.

Returns new instance, initializes with string.

Parameters:

a_str

The source string.

Returns:

The new instance.

Definition at line 81 of file string_source.cc.

References string_source().

{
        return new string_source(a_str);
}

string_source& lestes::lang::cplus::lex::string_source::operator=

(

const string_source &

)

[private]

Hides assignment operator.

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Member Data Documentation

string_type lestes::lang::cplus::lex::string_source::str [private]

String to read from.

Definition at line 70 of file string_source.hh.

Referenced by read().

index_type lestes::lang::cplus::lex::string_source::idx [private]

Position in string.

Definition at line 72 of file string_source.hh.

Referenced by read().

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

• string_source.hh
• string_source.cc

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