Annex D (normative) Compatibility features [depr]

D.12 char* streams [depr.str.strstreams]

D.12.2 Class strstreambuf [depr.strstreambuf]

D.12.2.1 strstreambuf constructors [depr.strstreambuf.cons]

explicit strstreambuf(streamsize alsize_arg);

Effects: Initializes the base class with streambuf().

The postconditions of this function are indicated in Table 148 .

Table 148: strstreambuf(streamsize) effects [tab:depr.strstreambuf.cons.sz]

Element	Value
strmode	dynamic
alsize	alsize_arg
palloc	a null pointer
pfree	a null pointer

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strstreambuf(void* (*palloc_arg)(size_t), void (*pfree_arg)(void*));

Effects: Initializes the base class with streambuf().

The postconditions of this function are indicated in Table 149 .

Table 149: strstreambuf(void* (*)(size_t), void (*)(void*)) effects [tab:depr.strstreambuf.cons.alloc]

Element	Value
strmode	dynamic
alsize	an unspecified value
palloc	palloc_arg
pfree	pfree_arg

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strstreambuf(char* gnext_arg, streamsize n, char* pbeg_arg = nullptr);
strstreambuf(signed char* gnext_arg, streamsize n,
             signed char* pbeg_arg = nullptr);
strstreambuf(unsigned char* gnext_arg, streamsize n,
             unsigned char* pbeg_arg = nullptr);

Effects: Initializes the base class with streambuf().

The postconditions of this function are indicated in Table 150 .

Table 150: strstreambuf(charT*, streamsize, charT*) effects [tab:depr.strstreambuf.cons.ptr]

Element	Value
strmode	0
alsize	an unspecified value
palloc	a null pointer
pfree	a null pointer

gnext_arg shall point to the first element of an array object whose number of elements N is determined as follows:

(4.1)
If n > 0, N is n.
(4.2)
If n == 0, N is std::strlen(gnext_arg).
(4.3)
If n < 0, N is INT_MAX.327

If pbeg_arg is a null pointer, the function executes:

setg(gnext_arg, gnext_arg, gnext_arg + N);

Otherwise, the function executes:

setg(gnext_arg, gnext_arg, pbeg_arg);
setp(pbeg_arg,  pbeg_arg + N);

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strstreambuf(const char* gnext_arg, streamsize n);
strstreambuf(const signed char* gnext_arg, streamsize n);
strstreambuf(const unsigned char* gnext_arg, streamsize n);

Effects: Behaves the same as strstreambuf((char*)gnext_arg,n), except that the constructor also sets constant in strmode.

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virtual ~strstreambuf();

Effects: Destroys an object of class strstreambuf.

The function frees the dynamically allocated array object only if (strmode & allocated) != 0 and (strmode & frozen) == 0.

([depr.strstreambuf.virtuals] describes how a dynamically allocated array object is freed.)

327)

The function signature strlen(const char*) is declared in <cstring> ([cstring.syn]).

The macro INT_MAX is defined in <climits> ([climits.syn]).

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