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Showing content from https://timsong-cpp.github.io/cppwp/n4659/depr.strstreambuf.cons below:

[depr.strstreambuf.cons]

Annex D (normative) Compatibility features [depr] D.6 char* streams [depr.str.strstreams] D.6.1 Class strstreambuf [depr.strstreambuf] D.6.1.1 strstreambuf constructors [depr.strstreambuf.cons]

explicit strstreambuf(streamsize alsize_arg = 0);

Effects: Constructs an object of class strstreambuf, initializing the base class with streambuf(). The postconditions of this function are indicated in Table 142.

Table

142

—

strstreambuf(streamsize)

effects

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

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

Effects: Constructs an object of class strstreambuf, initializing the base class with streambuf(). The postconditions of this function are indicated in Table 143.

Table

143

—

strstreambuf(void* (*)(size_t), void (*)(void*))

effects

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

strstreambuf(char* gnext_arg, streamsize n, char* pbeg_arg = 0); strstreambuf(signed char* gnext_arg, streamsize n, signed char* pbeg_arg = 0); strstreambuf(unsigned char* gnext_arg, streamsize n, unsigned char* pbeg_arg = 0);

Effects: Constructs an object of class strstreambuf, initializing the base class with streambuf(). The postconditions of this function are indicated in Table 144.

Table

144

—

strstreambuf(charT*, streamsize, charT*)

effects

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:

If n > 0, N is n.
If n == 0, N is std::strlen(gnext_arg).
If n < 0, N is INT_MAX.331

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);

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.

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.)

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