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iostate | rdstate () const |
| Return the current stream error state.
|
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void | setstate (iostate state) |
| Set the stream error flags state in addition to currently set flags. More...
|
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void | clear (iostate state=goodbit) |
| Set the stream error state flags by assigning them the value of state . More...
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bool | good () const |
|
bool | eof () const |
| Return true if the associated stream has reached end-of-file. More...
|
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bool | fail () const |
| Return true if an error has occurred on the associated stream, since last time state was reset (clear() was called). More...
|
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bool | bad () const |
| Return true if a non-recoverable error has occurred on the associated stream. More...
|
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bool | operator! () const |
| Return true if an error has occurred on the associated stream, since last time state was reset (clear() was called). More...
|
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| operator bool () const |
| Check that the current stream has no errors. More...
|
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void | flags (fmtflags flags) |
| Set new format flags for this stream. More...
|
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fmtflags | flags () const |
| Return the format flags currently selected in this stream. More...
|
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void | setf (fmtflags flags) |
| Set this stream's format flags whose bits are set in flags , leaving unchanged the rest. More...
|
|
void | setf (fmtflags flags, fmtflags mask) |
| Set this stream's format flags whose bits are set in both flags and mask , and clears the format flags whose bits are set in mask but not in flags . More...
|
|
void | unsetf (fmtflags flags) |
| Clear this stream's format flags whose bits are set in flags . More...
|
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char | fill () const |
| Return the fill character. More...
|
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void | fill (char fill) |
| Set fill as new fill character for this stream. More...
|
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void | width (uint8_t width) |
| Set minimum width used for displaying values. More...
|
|
uint8_t | width () const |
| Get the current minimum width value (default = 0 ) used for formatted output. More...
|
|
void | precision (uint8_t precision) |
| Set precision (number of digits after decimal point) used for displaying floating values. More...
|
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uint8_t | precision () const |
| Get the current precision (default = 6 ) used for formatted floating values output. More...
|
|
ios_base & | copyfmt (const ios_base &rhs) |
| Copy formatting information from rhs to this stream. More...
|
|
|
static constexpr iostate | eofbit = 0x01 |
| This bit is set if the stream has unexpectedly reached its end during an extraction. More...
|
|
static constexpr iostate | failbit = 0x02 |
| This bit is set when an input or operation failed due to a formatting error during extraction.
|
|
static constexpr iostate | badbit = 0x04 |
| This bit is set when an irrecoverable stream error has occurred, e.g. More...
|
|
static constexpr iostate | goodbit = 0 |
| No error; always 0 .
|
|
static constexpr fmtflags | dec = 0x0001 |
| Read or write integral values using decimal (0..9) base format.
|
|
static constexpr fmtflags | bin = 0x0002 |
| Read or write integral values using binary (0,1) base format.
|
|
static constexpr fmtflags | oct = 0x0004 |
| Read or write integral values using octal (0..7) base format.
|
|
static constexpr fmtflags | hex = 0x0008 |
| Read or write integral values using hexadecimal (0..9,A..F) base format.
|
|
static constexpr fmtflags | basefield = dec | bin | oct | hex |
| Bitmask constant used with setf(fmtflags, fmtflags) when changing the output base format. More...
|
|
static constexpr fmtflags | left = 0x0010 |
| Pad all output to width() characters, with fill() character appended at the end so that the output appears left-adjusted.
|
|
static constexpr fmtflags | right = 0x0020 |
| Pad all output to width() characters, with fill() character added at the beginning so that the output appears right-adjusted.
|
|
static constexpr fmtflags | adjustfield = left | right |
| Bitmask constant used with setf(fmtflags, fmtflags) when changing the output adjustment. More...
|
|
static constexpr fmtflags | scientific = 0x0040 |
| Write floating point values in fixed-point notation.
|
|
static constexpr fmtflags | fixed = 0x0080 |
| Write floating point values in scientific notation.
|
|
static constexpr fmtflags | floatfield = scientific | fixed |
| Bitmask constant used with setf(fmtflags, fmtflags) when changing the floating point output representation. More...
|
|
static constexpr fmtflags | boolalpha = 0x0200 |
| Read or write bool values as alphabetic string (true or false ).
|
|
static constexpr fmtflags | showbase = 0x0400 |
| Write integral values prefixed by their base: More...
|
|
static constexpr fmtflags | showpos = 0x1000 |
| Write non-negative numerical values preceded by + .
|
|
static constexpr fmtflags | skipws = 0x2000 |
| Skip leading spaces on certain extraction (read) operations.
|
|
static constexpr fmtflags | unitbuf = 0x4000 |
| Flush output after each insertion operation.
|
|
static constexpr fmtflags | uppercase = 0x8000U |
| Write uppercase letters instead of lowercase in certain insertion operations. More...
|
|
static constexpr uint8_t | MAX_PRECISION = 16 |
| The maximum allowed precision. More...
|
|
Base class for formatted streams.
Allows defining base, width and precision for numbers display.
Definition at line 37 of file ios.h.
Set this stream's format flags whose bits are set in both flags
and mask
, and clears the format flags whose bits are set in mask
but not in flags
.
This is equivalent to flags((flags & mask) | (flags() & ~mask));
.
This method is used to set a value for one of a group of related flags, using one of the field bitmasks as the mask
argument:
flags | mask |
left, right | adjustfield |
dec, bin, oct, hex | basefield |
scientific, fixed | floatfield |
- See also
- fmtflags
-
setf(fmtflags)
-
flags(fmtflags)
Definition at line 335 of file ios.h.
void streams::ios_base::width |
( |
uint8_t |
width | ) |
|
|
inline |
Set minimum width used for displaying values.
If a value's representation needs less than width
characters for display, then additional characters will be added before or after the value. The filler character is determined by fill()
, a space by default. Padding side is determined by flags()
: left
or right
. Note that if the value representation needs more than width
characters, then width
will have no effect on display.
- Parameters
-
width | the new width to use for next formatted output |
- See also
- fill(char)
-
flags(fmtflags)
-
left
-
right
Definition at line 390 of file ios.h.