74 lines
2.6 KiB
Markdown
74 lines
2.6 KiB
Markdown
[basic.ios.cons]
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# 31 Input/output library [[input.output]](./#input.output)
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## 31.5 Iostreams base classes [[iostreams.base]](iostreams.base#basic.ios.cons)
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### 31.5.4 Class template basic_ios [[ios]](ios#basic.ios.cons)
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#### 31.5.4.2 Constructors [basic.ios.cons]
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[ð](#lib:basic_ios,constructor)
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`explicit basic_ios(basic_streambuf<charT, traits>* sb);
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`
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[1](#1)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L1879)
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*Effects*: Assigns initial values to its member objects by callinginit(sb)[.](#1.sentence-1)
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[ð](#lib:basic_ios,constructor_)
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`basic_ios();
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`
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[2](#2)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L1891)
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*Effects*: Leaves its member objects uninitialized[.](#2.sentence-1)
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The object
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shall be initialized by callingbasic_ios::init before its first use or before it is destroyed, whichever comes first; otherwise the
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behavior is undefined[.](#2.sentence-2)
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[ð](#lib:basic_ios,destructor)
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`~basic_ios();
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`
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[3](#3)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L1906)
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*Remarks*: The destructor does not destroyrdbuf()[.](#3.sentence-1)
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[ð](#lib:init,basic_ios)
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`void init(basic_streambuf<charT, traits>* sb);
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`
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[4](#4)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L1918)
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*Postconditions*: The postconditions of this function are indicated in Table [142](#tab:basic.ios.cons "Table 142: basic_ios::init() effects")[.](#4.sentence-1)
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Table [142](#tab:basic.ios.cons) — basic_ios::init() effects [[tab:basic.ios.cons]](./tab:basic.ios.cons)
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| [ð](#tab:basic.ios.cons-row-1)<br>**Element** | **Value** |
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| --- | --- |
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| [ð](#tab:basic.ios.cons-row-2)<br>rdbuf() | sb |
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| [ð](#tab:basic.ios.cons-row-3)<br>tie() | 0 |
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| [ð](#tab:basic.ios.cons-row-4)<br>rdstate() | goodbit if sb is not a null pointer, otherwise badbit[.](#tab:basic.ios.cons-row-4-column-2-sentence-1) |
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| [ð](#tab:basic.ios.cons-row-5)<br>exceptions() | goodbit |
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| [ð](#tab:basic.ios.cons-row-6)<br>flags() | skipws | dec |
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| [ð](#tab:basic.ios.cons-row-7)<br>width() | 0 |
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| [ð](#tab:basic.ios.cons-row-8)<br>precision() | 6 |
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| [ð](#tab:basic.ios.cons-row-9)<br>fill() | widen(' ') |
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| [ð](#tab:basic.ios.cons-row-10)<br>getloc() | a copy of the value returned by locale() |
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| [ð](#tab:basic.ios.cons-row-11)<br>*iarray* | a null pointer |
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| [ð](#tab:basic.ios.cons-row-12)<br>*parray* | a null pointer |
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