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Module: stdgo.strconv

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Overview

Package strconv implements conversions to and from string representations of basic data types.

Numeric Conversions

The most common numeric conversions are Atoi (string to int) and Itoa (int to string). 

	i, err := strconv.Atoi("-42")
	s := strconv.Itoa(-42)

These assume decimal and the Go int type.

[ParseBool], [ParseFloat], [ParseInt], and [ParseUint] convert strings to values: 

	b, err := strconv.ParseBool("true")
	f, err := strconv.ParseFloat("3.1415", 64)
	i, err := strconv.ParseInt("-42", 10, 64)
	u, err := strconv.ParseUint("42", 10, 64)

The parse functions return the widest type (float64, int64, and uint64), but if the size argument specifies a narrower width the result can be converted to that narrower type without data loss: 

	s := "2147483647" // biggest int32
	i64, err := strconv.ParseInt(s, 10, 32)
	...
	i := int32(i64)

[FormatBool], [FormatFloat], [FormatInt], and [FormatUint] convert values to strings: 

	s := strconv.FormatBool(true)
	s := strconv.FormatFloat(3.1415, 'E', -1, 64)
	s := strconv.FormatInt(-42, 16)
	s := strconv.FormatUint(42, 16)

[AppendBool], [AppendFloat], [AppendInt], and [AppendUint] are similar but append the formatted value to a destination slice.

String Conversions

[Quote] and [QuoteToASCII] convert strings to quoted Go string literals. The latter guarantees that the result is an ASCII string, by escaping any non-ASCII Unicode with \u: 

	q := strconv.Quote("Hello, 世界")
	q := strconv.QuoteToASCII("Hello, 世界")

[QuoteRune] and [QuoteRuneToASCII] are similar but accept runes and return quoted Go rune literals.

[Unquote] and [UnquoteChar] unquote Go string and rune literals.

Index

Examples

Constants

import stdgo.strconv.Strconv
final _detailedPowersOfTenMaxExp10:stdgo.GoUInt64 = ((347i64 : stdgo.GoUInt64))

detailedPowersOfTen{Min,Max}Exp10 is the power of 10 represented by the first and last rows of detailedPowersOfTen. Both bounds are inclusive. 

final _detailedPowersOfTenMinExp10:stdgo.GoUInt64 = ((0i64 : stdgo.GoUInt64))

detailedPowersOfTen{Min,Max}Exp10 is the power of 10 represented by the first and last rows of detailedPowersOfTen. Both bounds are inclusive. 

final _digits:stdgo.GoString = (("0123456789abcdefghijklmnopqrstuvwxyz" : stdgo.GoString))
final _fastSmalls:Bool = true

enable fast path for small integers 

final _fnParseComplex:stdgo.GoString = (("ParseComplex" : stdgo.GoString))
final _fnParseFloat:stdgo.GoString = (("ParseFloat" : stdgo.GoString))
final _host32bit:Bool = true
final _intSize:stdgo.GoUInt64 = ((32i64 : stdgo.GoUInt64))
final _lowerhex:stdgo.GoString = (("0123456789abcdef" : stdgo.GoString))
final _maxShift:stdgo.GoUInt64 = ((28i64 : stdgo.GoUInt64))
final _maxUint64:stdgo.GoUInt64 = ((-1i64 : stdgo.GoUInt64))
final _nSmalls:stdgo.GoUInt64 = ((100i64 : stdgo.GoUInt64))
final _smallsString:stdgo.GoString = (("00010203040506070809101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899" : stdgo.GoString))
final _uintSize:stdgo.GoUInt64 = ((32i64 : stdgo.GoUInt64))

Maximum shift that we can do in one pass without overflow. A uint has 32 or 64 bits, and we have to be able to accommodate 9\<\<k. 

final _upperhex:stdgo.GoString = (("0123456789ABCDEF" : stdgo.GoString))
final intSize:stdgo.GoUInt64 = ((32i64 : stdgo.GoUInt64))

IntSize is the size in bits of an int or uint value.

Variables

import stdgo.strconv.Strconv
var _detailedPowersOfTen:stdgo.GoArray<stdgo.GoArray<stdgo.GoUInt64>>

detailedPowersOfTen contains 128-bit mantissa approximations (rounded down) to the powers of 10. For example: 

   - 1e43 ≈ (0xE596B7B0_C643C719                   * (2 ** 79))
   - 1e43 = (0xE596B7B0_C643C719_6D9CCD05_D0000000 * (2 ** 15))

The mantissas are explicitly listed. The exponents are implied by a linear expression with slope 217706.0/65536.0 ≈ log(10)/log(2).

The table was generated by https://github.com/google/wuffs/blob/ba3818cb6b473a2ed0b38ecfc07dbbd3a97e8ae7/script/print-mpb-powers-of-10.go 

var _float32info:stdgo.strconv.T_floatInfo
var _float32pow10:stdgo.Slice<stdgo.GoFloat32>
var _float64info:stdgo.strconv.T_floatInfo
var _float64pow10:stdgo.Slice<stdgo.GoFloat64>

Exact powers of 10. 

var _isGraphic:stdgo.Slice<stdgo.GoUInt16>

isGraphic lists the graphic runes not matched by IsPrint. 

var _isNotPrint16:stdgo.Slice<stdgo.GoUInt16>
var _isNotPrint32:stdgo.Slice<stdgo.GoUInt16>
var _isPrint16:stdgo.Slice<stdgo.GoUInt16>
var _isPrint32:stdgo.Slice<stdgo.GoUInt32>
var _leftcheats:stdgo.Slice<stdgo.strconv.T_leftCheat>
var _optimize:Bool

set to false to force slow-path conversions for testing 

var _powtab:stdgo.Slice<stdgo.GoInt>

decimal power of ten to binary power of two. 

var _uint64pow10:stdgo.GoArray<stdgo.GoUInt64>
var errRange:stdgo.Error

ErrRange indicates that a value is out of range for the target type. 

var errSyntax:stdgo.Error

ErrSyntax indicates that a value does not have the right syntax for the target type.

Functions

import stdgo.strconv.Strconv

function _appendEscapedRune

function _appendEscapedRune(_buf:stdgo.Slice<stdgo.GoByte>, _r:stdgo.GoRune, _quote:stdgo.GoByte, asciionly:Bool, _graphicOnly:Bool):stdgo.Slice<stdgo.GoByte>

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function _appendQuotedRuneWith

function _appendQuotedRuneWith(_buf:stdgo.Slice<stdgo.GoByte>, _r:stdgo.GoRune, _quote:stdgo.GoByte, asciionly:Bool, _graphicOnly:Bool):stdgo.Slice<stdgo.GoByte>

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function _appendQuotedWith

function _appendQuotedWith(_buf:stdgo.Slice<stdgo.GoByte>, _s:stdgo.GoString, _quote:stdgo.GoByte, asciionly:Bool, _graphicOnly:Bool):stdgo.Slice<stdgo.GoByte>

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function _atof32

function _atof32(_s:stdgo.GoString):{
	_2:stdgo.Error;
	_1:stdgo.GoInt;
	_0:stdgo.GoFloat32;
}

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function _atof32exact

function _atof32exact(_mantissa:stdgo.GoUInt64, _exp:stdgo.GoInt, _neg:Bool):{
	_1:Bool;
	_0:stdgo.GoFloat32;
}

If possible to compute mantissa*10^exp to 32-bit float f exactly, entirely in floating-point math, do so, avoiding the machinery above.

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function _atof64

function _atof64(_s:stdgo.GoString):{
	_2:stdgo.Error;
	_1:stdgo.GoInt;
	_0:stdgo.GoFloat64;
}

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function _atof64exact

function _atof64exact(_mantissa:stdgo.GoUInt64, _exp:stdgo.GoInt, _neg:Bool):{
	_1:Bool;
	_0:stdgo.GoFloat64;
}

If possible to convert decimal representation to 64-bit float f exactly, entirely in floating-point math, do so, avoiding the expense of decimalToFloatBits. Three common cases: 

	value is exact integer
	value is exact integer * exact power of ten
	value is exact integer / exact power of ten

These all produce potentially inexact but correctly rounded answers.

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function _atofHex

function _atofHex(_s:stdgo.GoString, _flt:stdgo.Ref<stdgo.strconv.T_floatInfo>, _mantissa:stdgo.GoUInt64, _exp:stdgo.GoInt, _neg:Bool, _trunc:Bool):{
	_1:stdgo.Error;
	_0:stdgo.GoFloat64;
}

atofHex converts the hex floating-point string s to a rounded float32 or float64 value (depending on flt==&float32info or flt==&float64info) and returns it as a float64. The string s has already been parsed into a mantissa, exponent, and sign (neg==true for negative). If trunc is true, trailing non-zero bits have been omitted from the mantissa.

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function _baseError

function _baseError(_fn:stdgo.GoString, _str:stdgo.GoString, _base:stdgo.GoInt):stdgo.Ref<stdgo.strconv.NumError>

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function _bigFtoa

function _bigFtoa(_dst:stdgo.Slice<stdgo.GoByte>, _prec:stdgo.GoInt, _fmt:stdgo.GoByte, _neg:Bool, _mant:stdgo.GoUInt64, _exp:stdgo.GoInt, _flt:stdgo.Ref<stdgo.strconv.T_floatInfo>):stdgo.Slice<stdgo.GoByte>

bigFtoa uses multiprecision computations to format a float.

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function _bitSizeError

function _bitSizeError(_fn:stdgo.GoString, _str:stdgo.GoString, _bitSize:stdgo.GoInt):stdgo.Ref<stdgo.strconv.NumError>

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function _bsearch16

function _bsearch16(_a:stdgo.Slice<stdgo.GoUInt16>, _x:stdgo.GoUInt16):stdgo.GoInt

bsearch16 returns the smallest i such that a[i] \>= x. If there is no such i, bsearch16 returns len(a).

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function _bsearch32

function _bsearch32(_a:stdgo.Slice<stdgo.GoUInt32>, _x:stdgo.GoUInt32):stdgo.GoInt

bsearch32 returns the smallest i such that a[i] \>= x. If there is no such i, bsearch32 returns len(a).

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function _cloneString

function _cloneString(_x:stdgo.GoString):stdgo.GoString

cloneString returns a string copy of x.

All ParseXXX functions allow the input string to escape to the error value. This hurts strconv.ParseXXX(string(b)) calls where b is []byte since the conversion from []byte must allocate a string on the heap. If we assume errors are infrequent, then we can avoid escaping the input back to the output by copying it first. This allows the compiler to call strconv.ParseXXX without a heap allocation for most []byte to string conversions, since it can now prove that the string cannot escape Parse.

TODO: Use strings.Clone instead? However, we cannot depend on "strings" since it incurs a transitive dependency on "unicode". Either move strings.Clone to an internal/bytealg or make the "strings" to "unicode" dependency lighter (see https://go.dev/issue/54098).

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function _commonPrefixLenIgnoreCase

function _commonPrefixLenIgnoreCase(_s:stdgo.GoString, _prefix:stdgo.GoString):stdgo.GoInt

commonPrefixLenIgnoreCase returns the length of the common prefix of s and prefix, with the character case of s ignored. The prefix argument must be all lower-case.

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function _computeBounds

function _computeBounds(_mant:stdgo.GoUInt64, _exp:stdgo.GoInt, _flt:stdgo.Ref<stdgo.strconv.T_floatInfo>):{
	_3:stdgo.GoInt;
	_2:stdgo.GoUInt64;
	_1:stdgo.GoUInt64;
	_0:stdgo.GoUInt64;
}

computeBounds returns a floating-point vector (l, c, u)×2^e2 where the mantissas are 55-bit (or 26-bit) integers, describing the interval represented by the input float64 or float32.

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function _contains

function _contains(_s:stdgo.GoString, _c:stdgo.GoByte):Bool

contains reports whether the string contains the byte c.

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function _convErr

function _convErr(_err:stdgo.Error, _s:stdgo.GoString):{
	_1:stdgo.Error;
	_0:stdgo.Error;
}

convErr splits an error returned by parseFloatPrefix into a syntax or range error for ParseComplex.

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function _digitZero

function _digitZero(_dst:stdgo.Slice<stdgo.GoByte>):stdgo.GoInt

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function _divisibleByPower5

function _divisibleByPower5(_m:stdgo.GoUInt64, _k:stdgo.GoInt):Bool

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function _divmod1e9

function _divmod1e9(_x:stdgo.GoUInt64):{
	_1:stdgo.GoUInt32;
	_0:stdgo.GoUInt32;
}

divmod1e9 computes quotient and remainder of division by 1e9, avoiding runtime uint64 division on 32-bit platforms.

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function _eiselLemire32

function _eiselLemire32(_man:stdgo.GoUInt64, _exp10:stdgo.GoInt, _neg:Bool):{
	_1:Bool;
	_0:stdgo.GoFloat32;
}

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function _eiselLemire64

function _eiselLemire64(_man:stdgo.GoUInt64, _exp10:stdgo.GoInt, _neg:Bool):{
	_1:Bool;
	_0:stdgo.GoFloat64;
}

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function _fmtB

function _fmtB(_dst:stdgo.Slice<stdgo.GoByte>, _neg:Bool, _mant:stdgo.GoUInt64, _exp:stdgo.GoInt, _flt:stdgo.Ref<stdgo.strconv.T_floatInfo>):stdgo.Slice<stdgo.GoByte>

%b: -ddddddddp±ddd

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function _fmtE

function _fmtE(_dst:stdgo.Slice<stdgo.GoByte>, _neg:Bool, _d:stdgo.strconv.T_decimalSlice, _prec:stdgo.GoInt, _fmt:stdgo.GoByte):stdgo.Slice<stdgo.GoByte>

%e: -d.ddddde±dd

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function _fmtF

function _fmtF(_dst:stdgo.Slice<stdgo.GoByte>, _neg:Bool, _d:stdgo.strconv.T_decimalSlice, _prec:stdgo.GoInt):stdgo.Slice<stdgo.GoByte>

%f: -ddddddd.ddddd

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function _fmtX

function _fmtX(_dst:stdgo.Slice<stdgo.GoByte>, _prec:stdgo.GoInt, _fmt:stdgo.GoByte, _neg:Bool, _mant:stdgo.GoUInt64, _exp:stdgo.GoInt, _flt:stdgo.Ref<stdgo.strconv.T_floatInfo>):stdgo.Slice<stdgo.GoByte>

%x: -0x1.yyyyyyyyp±ddd or -0x0p+0. (y is hex digit, d is decimal digit)

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function _formatBits

function _formatBits(_dst:stdgo.Slice<stdgo.GoByte>, _u:stdgo.GoUInt64, _base:stdgo.GoInt, _neg:Bool, _append_:Bool):{
	_1:stdgo.GoString;
	_0:stdgo.Slice<stdgo.GoByte>;
}

formatBits computes the string representation of u in the given base. If neg is set, u is treated as negative int64 value. If append_ is set, the string is appended to dst and the resulting byte slice is returned as the first result value; otherwise the string is returned as the second result value.

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function _formatDecimal

function _formatDecimal(_d:stdgo.Ref<stdgo.strconv.T_decimalSlice>, _m:stdgo.GoUInt64, _trunc:Bool, _roundUp:Bool, _prec:stdgo.GoInt):Void

formatDecimal fills d with at most prec decimal digits of mantissa m. The boolean trunc indicates whether m is truncated compared to the original number being formatted.

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function _formatDigits

function _formatDigits(_dst:stdgo.Slice<stdgo.GoByte>, _shortest:Bool, _neg:Bool, _digs:stdgo.strconv.T_decimalSlice, _prec:stdgo.GoInt, _fmt:stdgo.GoByte):stdgo.Slice<stdgo.GoByte>

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function _genericFtoa

function _genericFtoa(_dst:stdgo.Slice<stdgo.GoByte>, _val:stdgo.GoFloat64, _fmt:stdgo.GoByte, _prec:stdgo.GoInt, _bitSize:stdgo.GoInt):stdgo.Slice<stdgo.GoByte>

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function _index

function _index(_s:stdgo.GoString, _c:stdgo.GoByte):stdgo.GoInt

index returns the index of the first instance of c in s, or -1 if missing.

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function _isInGraphicList

function _isInGraphicList(_r:stdgo.GoRune):Bool

isInGraphicList reports whether the rune is in the isGraphic list. This separation from IsGraphic allows quoteWith to avoid two calls to IsPrint. Should be called only if IsPrint fails.

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function _isPowerOfTwo

function _isPowerOfTwo(_x:stdgo.GoInt):Bool

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function _leftShift

function _leftShift(_a:stdgo.Ref<stdgo.strconv.T_decimal>, _k:stdgo.GoUInt):Void

Binary shift left (* 2) by k bits. k \<= maxShift to avoid overflow.

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function _lower

function _lower(_c:stdgo.GoByte):stdgo.GoByte

lower(c) is a lower-case letter if and only if c is either that lower-case letter or the equivalent upper-case letter. Instead of writing c == 'x' || c == 'X' one can write lower(c) == 'x'. Note that lower of non-letters can produce other non-letters.

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function _max

function _max(_a:stdgo.GoInt, _b:stdgo.GoInt):stdgo.GoInt

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function _min

function _min(_a:stdgo.GoInt, _b:stdgo.GoInt):stdgo.GoInt

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function _mulByLog10Log2

function _mulByLog10Log2(_x:stdgo.GoInt):stdgo.GoInt

mulByLog10Log2 returns math.Floor(x * log(10)/log(2)) for an integer x in the range -500 \<= x && x \<= +500.

The range restriction lets us work in faster integer arithmetic instead of slower floating point arithmetic. Correctness is verified by unit tests.

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function _mulByLog2Log10

function _mulByLog2Log10(_x:stdgo.GoInt):stdgo.GoInt

mulByLog2Log10 returns math.Floor(x * log(2)/log(10)) for an integer x in the range -1600 \<= x && x \<= +1600.

The range restriction lets us work in faster integer arithmetic instead of slower floating point arithmetic. Correctness is verified by unit tests.

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function _mult128bitPow10

function _mult128bitPow10(_m:stdgo.GoUInt64, _e2:stdgo.GoInt, _q:stdgo.GoInt):{
	_2:Bool;
	_1:stdgo.GoInt;
	_0:stdgo.GoUInt64;
}

mult128bitPow10 takes a floating-point input with a 55-bit mantissa and multiplies it with 10^q. The resulting mantissa is m*P \>\> 119 where P is a 128-bit element of the detailedPowersOfTen tables. It is typically 63 or 64-bit wide. The returned boolean is true is all trimmed bits were zero.

That is: 

	m*2^e2 * round(10^q) = resM * 2^resE + ε
	exact = ε == 0

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function _mult64bitPow10

function _mult64bitPow10(_m:stdgo.GoUInt32, _e2:stdgo.GoInt, _q:stdgo.GoInt):{
	_2:Bool;
	_1:stdgo.GoInt;
	_0:stdgo.GoUInt32;
}

mult64bitPow10 takes a floating-point input with a 25-bit mantissa and multiplies it with 10^q. The resulting mantissa is m*P \>\> 57 where P is a 64-bit element of the detailedPowersOfTen tables. It is typically 31 or 32-bit wide. The returned boolean is true if all trimmed bits were zero.

That is: 

	m*2^e2 * round(10^q) = resM * 2^resE + ε
	exact = ε == 0

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function _parseFloatPrefix

function _parseFloatPrefix(_s:stdgo.GoString, _bitSize:stdgo.GoInt):{
	_2:stdgo.Error;
	_1:stdgo.GoInt;
	_0:stdgo.GoFloat64;
}

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function _prefixIsLessThan

function _prefixIsLessThan(_b:stdgo.Slice<stdgo.GoByte>, _s:stdgo.GoString):Bool

Is the leading prefix of b lexicographically less than s?

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function _quoteRuneWith

function _quoteRuneWith(_r:stdgo.GoRune, _quote:stdgo.GoByte, asciionly:Bool, _graphicOnly:Bool):stdgo.GoString

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function _quoteWith

function _quoteWith(_s:stdgo.GoString, _quote:stdgo.GoByte, asciionly:Bool, _graphicOnly:Bool):stdgo.GoString

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function _rangeError

function _rangeError(_fn:stdgo.GoString, _str:stdgo.GoString):stdgo.Ref<stdgo.strconv.NumError>

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function _readFloat

function _readFloat(_s:stdgo.GoString):{
	_6:Bool;
	_5:stdgo.GoInt;
	_4:Bool;
	_3:Bool;
	_2:Bool;
	_1:stdgo.GoInt;
	_0:stdgo.GoUInt64;
}

readFloat reads a decimal or hexadecimal mantissa and exponent from a float string representation in s; the number may be followed by other characters. readFloat reports the number of bytes consumed (i), and whether the number is valid (ok).

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function _rightShift

function _rightShift(_a:stdgo.Ref<stdgo.strconv.T_decimal>, _k:stdgo.GoUInt):Void

Binary shift right (/ 2) by k bits. k \<= maxShift to avoid overflow.

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function _roundShortest

function _roundShortest(_d:stdgo.Ref<stdgo.strconv.T_decimal>, _mant:stdgo.GoUInt64, _exp:stdgo.GoInt, _flt:stdgo.Ref<stdgo.strconv.T_floatInfo>):Void

roundShortest rounds d (= mant * 2^exp) to the shortest number of digits that will let the original floating point value be precisely reconstructed.

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function _ryuDigits

function _ryuDigits(_d:stdgo.Ref<stdgo.strconv.T_decimalSlice>, _lower:stdgo.GoUInt64, _central:stdgo.GoUInt64, _upper:stdgo.GoUInt64, _c0:Bool, _cup:Bool):Void

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function _ryuDigits32

function _ryuDigits32(_d:stdgo.Ref<stdgo.strconv.T_decimalSlice>, _lower:stdgo.GoUInt32, _central:stdgo.GoUInt32, _upper:stdgo.GoUInt32, _c0:Bool, _cup:Bool, _endindex:stdgo.GoInt):Void

ryuDigits32 emits decimal digits for a number less than 1e9.

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function _ryuFtoaFixed32

function _ryuFtoaFixed32(_d:stdgo.Ref<stdgo.strconv.T_decimalSlice>, _mant:stdgo.GoUInt32, _exp:stdgo.GoInt, _prec:stdgo.GoInt):Void

ryuFtoaFixed32 formats mant*(2^exp) with prec decimal digits.

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function _ryuFtoaFixed64

function _ryuFtoaFixed64(_d:stdgo.Ref<stdgo.strconv.T_decimalSlice>, _mant:stdgo.GoUInt64, _exp:stdgo.GoInt, _prec:stdgo.GoInt):Void

ryuFtoaFixed64 formats mant*(2^exp) with prec decimal digits.

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function _ryuFtoaShortest

function _ryuFtoaShortest(_d:stdgo.Ref<stdgo.strconv.T_decimalSlice>, _mant:stdgo.GoUInt64, _exp:stdgo.GoInt, _flt:stdgo.Ref<stdgo.strconv.T_floatInfo>):Void

ryuFtoaShortest formats mant*2^exp with prec decimal digits.

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function _shouldRoundUp

function _shouldRoundUp(_a:stdgo.Ref<stdgo.strconv.T_decimal>, _nd:stdgo.GoInt):Bool

If we chop a at nd digits, should we round up?

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function _small

function _small(_i:stdgo.GoInt):stdgo.GoString

small returns the string for an i with 0 \<= i \< nSmalls.

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function _special

function _special(_s:stdgo.GoString):{
	_2:Bool;
	_1:stdgo.GoInt;
	_0:stdgo.GoFloat64;
}

special returns the floating-point value for the special, possibly signed floating-point representations inf, infinity, and NaN. The result is ok if a prefix of s contains one of these representations and n is the length of that prefix. The character case is ignored.

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function _syntaxError

function _syntaxError(_fn:stdgo.GoString, _str:stdgo.GoString):stdgo.Ref<stdgo.strconv.NumError>

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function _trim

function _trim(_a:stdgo.Ref<stdgo.strconv.T_decimal>):Void

trim trailing zeros from number. (They are meaningless; the decimal point is tracked independent of the number of digits.)

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function _underscoreOK

function _underscoreOK(_s:stdgo.GoString):Bool

underscoreOK reports whether the underscores in s are allowed. Checking them in this one function lets all the parsers skip over them simply. Underscore must appear only between digits or between a base prefix and a digit.

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function _unhex

function _unhex(_b:stdgo.GoByte):{
	_1:Bool;
	_0:stdgo.GoRune;
}

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function _unquote

function _unquote(_in:stdgo.GoString, _unescape:Bool):{
	_2:stdgo.Error;
	_1:stdgo.GoString;
	_0:stdgo.GoString;
}

unquote parses a quoted string at the start of the input, returning the parsed prefix, the remaining suffix, and any parse errors. If unescape is true, the parsed prefix is unescaped, otherwise the input prefix is provided verbatim.

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function appendBool

function appendBool(_dst:stdgo.Slice<stdgo.GoByte>, _b:Bool):stdgo.Slice<stdgo.GoByte>

AppendBool appends "true" or "false", according to the value of b, to dst and returns the extended buffer.

exampleAppendBool

function exampleAppendBool():Void {
        var _b = (("bool:" : stdgo.GoString) : stdgo.Slice<stdgo.GoByte>);
        _b = stdgo.strconv.Strconv.appendBool(_b, true);
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface((_b : stdgo.GoString)));
    }

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function appendFloat

function appendFloat(_dst:stdgo.Slice<stdgo.GoByte>, _f:stdgo.GoFloat64, _fmt:stdgo.GoByte, _prec:stdgo.GoInt, _bitSize:stdgo.GoInt):stdgo.Slice<stdgo.GoByte>

AppendFloat appends the string form of the floating-point number f, as generated by FormatFloat, to dst and returns the extended buffer.

exampleAppendFloat

function exampleAppendFloat():Void {
        var _b32 = (("float32:" : stdgo.GoString) : stdgo.Slice<stdgo.GoByte>);
        _b32 = stdgo.strconv.Strconv.appendFloat(_b32, (3.1415926535 : stdgo.GoFloat64), (69 : stdgo.GoUInt8), (-1 : stdgo.GoInt), (32 : stdgo.GoInt));
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface((_b32 : stdgo.GoString)));
        var _b64 = (("float64:" : stdgo.GoString) : stdgo.Slice<stdgo.GoByte>);
        _b64 = stdgo.strconv.Strconv.appendFloat(_b64, (3.1415926535 : stdgo.GoFloat64), (69 : stdgo.GoUInt8), (-1 : stdgo.GoInt), (64 : stdgo.GoInt));
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface((_b64 : stdgo.GoString)));
    }

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function appendInt

function appendInt(_dst:stdgo.Slice<stdgo.GoByte>, _i:stdgo.GoInt64, _base:stdgo.GoInt):stdgo.Slice<stdgo.GoByte>

AppendInt appends the string form of the integer i, as generated by FormatInt, to dst and returns the extended buffer.

exampleAppendInt

function exampleAppendInt():Void {
        var _b10 = (("int (base 10):" : stdgo.GoString) : stdgo.Slice<stdgo.GoByte>);
        _b10 = stdgo.strconv.Strconv.appendInt(_b10, (-42i64 : stdgo.GoInt64), (10 : stdgo.GoInt));
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface((_b10 : stdgo.GoString)));
        var _b16 = (("int (base 16):" : stdgo.GoString) : stdgo.Slice<stdgo.GoByte>);
        _b16 = stdgo.strconv.Strconv.appendInt(_b16, (-42i64 : stdgo.GoInt64), (16 : stdgo.GoInt));
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface((_b16 : stdgo.GoString)));
    }

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function appendQuote

function appendQuote(_dst:stdgo.Slice<stdgo.GoByte>, _s:stdgo.GoString):stdgo.Slice<stdgo.GoByte>

AppendQuote appends a double-quoted Go string literal representing s, as generated by Quote, to dst and returns the extended buffer.

exampleAppendQuote

function exampleAppendQuote():Void {
        var _b = (("quote:" : stdgo.GoString) : stdgo.Slice<stdgo.GoByte>);
        _b = stdgo.strconv.Strconv.appendQuote(_b, ("\"Fran & Freddie\'s Diner\"" : stdgo.GoString));
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface((_b : stdgo.GoString)));
    }

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function appendQuoteRune

function appendQuoteRune(_dst:stdgo.Slice<stdgo.GoByte>, _r:stdgo.GoRune):stdgo.Slice<stdgo.GoByte>

AppendQuoteRune appends a single-quoted Go character literal representing the rune, as generated by QuoteRune, to dst and returns the extended buffer.

exampleAppendQuoteRune

function exampleAppendQuoteRune():Void {
        var _b = (("rune:" : stdgo.GoString) : stdgo.Slice<stdgo.GoByte>);
        _b = stdgo.strconv.Strconv.appendQuoteRune(_b, (9786 : stdgo.GoInt32));
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface((_b : stdgo.GoString)));
    }

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function appendQuoteRuneToASCII

function appendQuoteRuneToASCII(_dst:stdgo.Slice<stdgo.GoByte>, _r:stdgo.GoRune):stdgo.Slice<stdgo.GoByte>

AppendQuoteRuneToASCII appends a single-quoted Go character literal representing the rune, as generated by QuoteRuneToASCII, to dst and returns the extended buffer.

exampleAppendQuoteRuneToASCII

function exampleAppendQuoteRuneToASCII():Void {
        var _b = (("rune (ascii):" : stdgo.GoString) : stdgo.Slice<stdgo.GoByte>);
        _b = stdgo.strconv.Strconv.appendQuoteRuneToASCII(_b, (9786 : stdgo.GoInt32));
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface((_b : stdgo.GoString)));
    }

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function appendQuoteRuneToGraphic

function appendQuoteRuneToGraphic(_dst:stdgo.Slice<stdgo.GoByte>, _r:stdgo.GoRune):stdgo.Slice<stdgo.GoByte>

AppendQuoteRuneToGraphic appends a single-quoted Go character literal representing the rune, as generated by QuoteRuneToGraphic, to dst and returns the extended buffer.

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function appendQuoteToASCII

function appendQuoteToASCII(_dst:stdgo.Slice<stdgo.GoByte>, _s:stdgo.GoString):stdgo.Slice<stdgo.GoByte>

AppendQuoteToASCII appends a double-quoted Go string literal representing s, as generated by QuoteToASCII, to dst and returns the extended buffer.

exampleAppendQuoteToASCII

function exampleAppendQuoteToASCII():Void {
        var _b = (("quote (ascii):" : stdgo.GoString) : stdgo.Slice<stdgo.GoByte>);
        _b = stdgo.strconv.Strconv.appendQuoteToASCII(_b, ("\"Fran & Freddie\'s Diner\"" : stdgo.GoString));
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface((_b : stdgo.GoString)));
    }

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function appendQuoteToGraphic

function appendQuoteToGraphic(_dst:stdgo.Slice<stdgo.GoByte>, _s:stdgo.GoString):stdgo.Slice<stdgo.GoByte>

AppendQuoteToGraphic appends a double-quoted Go string literal representing s, as generated by QuoteToGraphic, to dst and returns the extended buffer.

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function appendUint

function appendUint(_dst:stdgo.Slice<stdgo.GoByte>, _i:stdgo.GoUInt64, _base:stdgo.GoInt):stdgo.Slice<stdgo.GoByte>

AppendUint appends the string form of the unsigned integer i, as generated by FormatUint, to dst and returns the extended buffer.

exampleAppendUint

function exampleAppendUint():Void {
        var _b10 = (("uint (base 10):" : stdgo.GoString) : stdgo.Slice<stdgo.GoByte>);
        _b10 = stdgo.strconv.Strconv.appendUint(_b10, (42i64 : stdgo.GoUInt64), (10 : stdgo.GoInt));
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface((_b10 : stdgo.GoString)));
        var _b16 = (("uint (base 16):" : stdgo.GoString) : stdgo.Slice<stdgo.GoByte>);
        _b16 = stdgo.strconv.Strconv.appendUint(_b16, (42i64 : stdgo.GoUInt64), (16 : stdgo.GoInt));
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface((_b16 : stdgo.GoString)));
    }

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function atoi

function atoi(_s:stdgo.GoString):{
	_1:stdgo.Error;
	_0:stdgo.GoInt;
}

Atoi is equivalent to ParseInt(s, 10, 0), converted to type int.

exampleAtoi

function exampleAtoi():Void {
        var _v:stdgo.GoString = ("10" : stdgo.GoString);
        {
            var __tmp__ = stdgo.strconv.Strconv.atoi(_v?.__copy__()), _s:stdgo.GoInt = __tmp__._0, _err:stdgo.Error = __tmp__._1;
            if (_err == null) {
                stdgo.fmt.Fmt.printf(("%T, %v" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
            };
        };
    }

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function baseError

function baseError(:stdgo.GoString, :stdgo.GoString, :stdgo.GoInt):stdgo.Ref<stdgo.strconv.NumError>

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function bitSizeError

function bitSizeError(:stdgo.GoString, :stdgo.GoString, :stdgo.GoInt):stdgo.Ref<stdgo.strconv.NumError>

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function canBackquote

function canBackquote(_s:stdgo.GoString):Bool

CanBackquote reports whether the string s can be represented unchanged as a single-line backquoted string without control characters other than tab.

exampleCanBackquote

function exampleCanBackquote():Void {
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(stdgo.strconv.Strconv.canBackquote(("Fran & Freddie\'s Diner ☺" : stdgo.GoString))));
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(stdgo.strconv.Strconv.canBackquote(("`can\'t backquote this`" : stdgo.GoString))));
    }

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function formatBool

function formatBool(_b:Bool):stdgo.GoString

FormatBool returns "true" or "false" according to the value of b.

exampleFormatBool

function exampleFormatBool():Void {
        var _v:Bool = true;
        var _s:stdgo.GoString = stdgo.strconv.Strconv.formatBool(_v)?.__copy__();
        stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
    }

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function formatComplex

function formatComplex(_c:stdgo.GoComplex128, _fmt:stdgo.GoByte, _prec:stdgo.GoInt, _bitSize:stdgo.GoInt):stdgo.GoString

FormatComplex converts the complex number c to a string of the form (a+bi) where a and b are the real and imaginary parts, formatted according to the format fmt and precision prec.

The format fmt and precision prec have the same meaning as in FormatFloat. It rounds the result assuming that the original was obtained from a complex value of bitSize bits, which must be 64 for complex64 and 128 for complex128.

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function formatFloat

function formatFloat(_f:stdgo.GoFloat64, _fmt:stdgo.GoByte, _prec:stdgo.GoInt, _bitSize:stdgo.GoInt):stdgo.GoString

FormatFloat converts the floating-point number f to a string, according to the format fmt and precision prec. It rounds the result assuming that the original was obtained from a floating-point value of bitSize bits (32 for float32, 64 for float64).

The format fmt is one of 'b' (-ddddp±ddd, a binary exponent), 'e' (-d.dddde±dd, a decimal exponent), 'E' (-d.ddddE±dd, a decimal exponent), 'f' (-ddd.dddd, no exponent), 'g' ('e' for large exponents, 'f' otherwise), 'G' ('E' for large exponents, 'f' otherwise), 'x' (-0xd.ddddp±ddd, a hexadecimal fraction and binary exponent), or 'X' (-0Xd.ddddP±ddd, a hexadecimal fraction and binary exponent).

The precision prec controls the number of digits (excluding the exponent) printed by the 'e', 'E', 'f', 'g', 'G', 'x', and 'X' formats. For 'e', 'E', 'f', 'x', and 'X', it is the number of digits after the decimal point. For 'g' and 'G' it is the maximum number of significant digits (trailing zeros are removed). The special precision -1 uses the smallest number of digits necessary such that ParseFloat will return f exactly.

exampleFormatFloat

function exampleFormatFloat():Void {
        var _v:stdgo.GoFloat64 = (3.1415926535 : stdgo.GoFloat64);
        var _s32:stdgo.GoString = stdgo.strconv.Strconv.formatFloat(_v, (69 : stdgo.GoUInt8), (-1 : stdgo.GoInt), (32 : stdgo.GoInt))?.__copy__();
        stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s32), stdgo.Go.toInterface(_s32));
        var _s64:stdgo.GoString = stdgo.strconv.Strconv.formatFloat(_v, (69 : stdgo.GoUInt8), (-1 : stdgo.GoInt), (64 : stdgo.GoInt))?.__copy__();
        stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s64), stdgo.Go.toInterface(_s64));
        var _fmt64:stdgo.GoString = stdgo.strconv.Strconv.formatFloat(_v, (103 : stdgo.GoUInt8), (-1 : stdgo.GoInt), (64 : stdgo.GoInt))?.__copy__();
        stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_fmt64), stdgo.Go.toInterface(_fmt64));
    }

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function formatInt

function formatInt(_i:stdgo.GoInt64, _base:stdgo.GoInt):stdgo.GoString

FormatInt returns the string representation of i in the given base, for 2 \<= base \<= 36. The result uses the lower-case letters 'a' to 'z' for digit values \>= 10.

exampleFormatInt

function exampleFormatInt():Void {
        var _v:stdgo.GoInt64 = (-42i64 : stdgo.GoInt64);
        var _s10:stdgo.GoString = stdgo.strconv.Strconv.formatInt(_v, (10 : stdgo.GoInt))?.__copy__();
        stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s10), stdgo.Go.toInterface(_s10));
        var _s16:stdgo.GoString = stdgo.strconv.Strconv.formatInt(_v, (16 : stdgo.GoInt))?.__copy__();
        stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s16), stdgo.Go.toInterface(_s16));
    }

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function formatUint

function formatUint(_i:stdgo.GoUInt64, _base:stdgo.GoInt):stdgo.GoString

FormatUint returns the string representation of i in the given base, for 2 \<= base \<= 36. The result uses the lower-case letters 'a' to 'z' for digit values \>= 10.

exampleFormatUint

function exampleFormatUint():Void {
        var _v:stdgo.GoUInt64 = (42i64 : stdgo.GoUInt64);
        var _s10:stdgo.GoString = stdgo.strconv.Strconv.formatUint(_v, (10 : stdgo.GoInt))?.__copy__();
        stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s10), stdgo.Go.toInterface(_s10));
        var _s16:stdgo.GoString = stdgo.strconv.Strconv.formatUint(_v, (16 : stdgo.GoInt))?.__copy__();
        stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s16), stdgo.Go.toInterface(_s16));
    }

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function isGraphic

function isGraphic(_r:stdgo.GoRune):Bool

IsGraphic reports whether the rune is defined as a Graphic by Unicode. Such characters include letters, marks, numbers, punctuation, symbols, and spaces, from categories L, M, N, P, S, and Zs.

exampleIsGraphic

function exampleIsGraphic():Void {
        var _shamrock:Bool = stdgo.strconv.Strconv.isGraphic((9752 : stdgo.GoInt32));
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(_shamrock));
        var _a:Bool = stdgo.strconv.Strconv.isGraphic((97 : stdgo.GoInt32));
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(_a));
        var _bel:Bool = stdgo.strconv.Strconv.isGraphic((7 : stdgo.GoInt32));
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(_bel));
    }

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function isPrint

function isPrint(_r:stdgo.GoRune):Bool

IsPrint reports whether the rune is defined as printable by Go, with the same definition as unicode.IsPrint: letters, numbers, punctuation, symbols and ASCII space.

exampleIsPrint

function exampleIsPrint():Void {
        var _c:Bool = stdgo.strconv.Strconv.isPrint((9786 : stdgo.GoInt32));
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(_c));
        var _bel:Bool = stdgo.strconv.Strconv.isPrint((7 : stdgo.GoInt32));
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(_bel));
    }

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function itoa

function itoa(_i:stdgo.GoInt):stdgo.GoString

Itoa is equivalent to FormatInt(int64(i), 10).

exampleItoa

function exampleItoa():Void {
        var _i:stdgo.GoInt = (10 : stdgo.GoInt);
        var _s:stdgo.GoString = stdgo.strconv.Strconv.itoa(_i)?.__copy__();
        stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
    }

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function mulByLog10Log2

function mulByLog10Log2(_x:stdgo.GoInt):stdgo.GoInt

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function mulByLog2Log10

function mulByLog2Log10(_x:stdgo.GoInt):stdgo.GoInt

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function newDecimal

function newDecimal(_i:stdgo.GoUInt64):stdgo.Ref<stdgo.strconv.T_decimal>

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function parseBool

function parseBool(_str:stdgo.GoString):{
	_1:stdgo.Error;
	_0:Bool;
}

ParseBool returns the boolean value represented by the string. It accepts 1, t, T, TRUE, true, True, 0, f, F, FALSE, false, False. Any other value returns an error.

exampleParseBool

function exampleParseBool():Void {
        var _v:stdgo.GoString = ("true" : stdgo.GoString);
        {
            var __tmp__ = stdgo.strconv.Strconv.parseBool(_v?.__copy__()), _s:Bool = __tmp__._0, _err:stdgo.Error = __tmp__._1;
            if (_err == null) {
                stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
            };
        };
    }

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function parseComplex

function parseComplex(_s:stdgo.GoString, _bitSize:stdgo.GoInt):{
	_1:stdgo.Error;
	_0:stdgo.GoComplex128;
}

ParseComplex converts the string s to a complex number with the precision specified by bitSize: 64 for complex64, or 128 for complex128. When bitSize=64, the result still has type complex128, but it will be convertible to complex64 without changing its value.

The number represented by s must be of the form N, Ni, or N±Ni, where N stands for a floating-point number as recognized by ParseFloat, and i is the imaginary component. If the second N is unsigned, a + sign is required between the two components as indicated by the ±. If the second N is NaN, only a + sign is accepted. The form may be parenthesized and cannot contain any spaces. The resulting complex number consists of the two components converted by ParseFloat.

The errors that ParseComplex returns have concrete type *NumError and include err.Num = s.

If s is not syntactically well-formed, ParseComplex returns err.Err = ErrSyntax.

If s is syntactically well-formed but either component is more than 1/2 ULP away from the largest floating point number of the given component's size, ParseComplex returns err.Err = ErrRange and c = ±Inf for the respective component.

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function parseFloat

function parseFloat(_s:stdgo.GoString, _bitSize:stdgo.GoInt):{
	_1:stdgo.Error;
	_0:stdgo.GoFloat64;
}

ParseFloat converts the string s to a floating-point number with the precision specified by bitSize: 32 for float32, or 64 for float64. When bitSize=32, the result still has type float64, but it will be convertible to float32 without changing its value.

ParseFloat accepts decimal and hexadecimal floating-point numbers as defined by the Go syntax for [floating-point literals]. If s is well-formed and near a valid floating-point number, ParseFloat returns the nearest floating-point number rounded using IEEE754 unbiased rounding. (Parsing a hexadecimal floating-point value only rounds when there are more bits in the hexadecimal representation than will fit in the mantissa.)

The errors that ParseFloat returns have concrete type *NumError and include err.Num = s.

If s is not syntactically well-formed, ParseFloat returns err.Err = ErrSyntax.

If s is syntactically well-formed but is more than 1/2 ULP away from the largest floating point number of the given size, ParseFloat returns f = ±Inf, err.Err = ErrRange.

ParseFloat recognizes the string "NaN", and the (possibly signed) strings "Inf" and "Infinity" as their respective special floating point values. It ignores case when matching.

[floating-point literals]: https://go.dev/ref/spec#Floating-point_literals

exampleParseFloat

function exampleParseFloat():Void {
        var _v:stdgo.GoString = ("3.1415926535" : stdgo.GoString);
        {
            var __tmp__ = stdgo.strconv.Strconv.parseFloat(_v?.__copy__(), (32 : stdgo.GoInt)), _s:stdgo.GoFloat64 = __tmp__._0, _err:stdgo.Error = __tmp__._1;
            if (_err == null) {
                stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
            };
        };
        {
            var __tmp__ = stdgo.strconv.Strconv.parseFloat(_v?.__copy__(), (64 : stdgo.GoInt)), _s:stdgo.GoFloat64 = __tmp__._0, _err:stdgo.Error = __tmp__._1;
            if (_err == null) {
                stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
            };
        };
        {
            var __tmp__ = stdgo.strconv.Strconv.parseFloat(("NaN" : stdgo.GoString), (32 : stdgo.GoInt)), _s:stdgo.GoFloat64 = __tmp__._0, _err:stdgo.Error = __tmp__._1;
            if (_err == null) {
                stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
            };
        };
        {
            var __tmp__ = stdgo.strconv.Strconv.parseFloat(("nan" : stdgo.GoString), (32 : stdgo.GoInt)), _s:stdgo.GoFloat64 = __tmp__._0, _err:stdgo.Error = __tmp__._1;
            if (_err == null) {
                stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
            };
        };
        {
            var __tmp__ = stdgo.strconv.Strconv.parseFloat(("inf" : stdgo.GoString), (32 : stdgo.GoInt)), _s:stdgo.GoFloat64 = __tmp__._0, _err:stdgo.Error = __tmp__._1;
            if (_err == null) {
                stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
            };
        };
        {
            var __tmp__ = stdgo.strconv.Strconv.parseFloat(("+Inf" : stdgo.GoString), (32 : stdgo.GoInt)), _s:stdgo.GoFloat64 = __tmp__._0, _err:stdgo.Error = __tmp__._1;
            if (_err == null) {
                stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
            };
        };
        {
            var __tmp__ = stdgo.strconv.Strconv.parseFloat(("-Inf" : stdgo.GoString), (32 : stdgo.GoInt)), _s:stdgo.GoFloat64 = __tmp__._0, _err:stdgo.Error = __tmp__._1;
            if (_err == null) {
                stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
            };
        };
        {
            var __tmp__ = stdgo.strconv.Strconv.parseFloat(("-0" : stdgo.GoString), (32 : stdgo.GoInt)), _s:stdgo.GoFloat64 = __tmp__._0, _err:stdgo.Error = __tmp__._1;
            if (_err == null) {
                stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
            };
        };
        {
            var __tmp__ = stdgo.strconv.Strconv.parseFloat(("+0" : stdgo.GoString), (32 : stdgo.GoInt)), _s:stdgo.GoFloat64 = __tmp__._0, _err:stdgo.Error = __tmp__._1;
            if (_err == null) {
                stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
            };
        };
    }

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function parseFloatPrefix

function parseFloatPrefix(_s:stdgo.GoString, _bitSize:stdgo.GoInt):{
	_2:stdgo.Error;
	_1:stdgo.GoInt;
	_0:stdgo.GoFloat64;
}

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function parseInt

function parseInt(_s:stdgo.GoString, _base:stdgo.GoInt, _bitSize:stdgo.GoInt):{
	_1:stdgo.Error;
	_0:stdgo.GoInt64;
}

ParseInt interprets a string s in the given base (0, 2 to 36) and bit size (0 to 64) and returns the corresponding value i.

The string may begin with a leading sign: "+" or "-".

If the base argument is 0, the true base is implied by the string's prefix following the sign (if present): 2 for "0b", 8 for "0" or "0o", 16 for "0x", and 10 otherwise. Also, for argument base 0 only, underscore characters are permitted as defined by the Go syntax for [integer literals].

The bitSize argument specifies the integer type that the result must fit into. Bit sizes 0, 8, 16, 32, and 64 correspond to int, int8, int16, int32, and int64. If bitSize is below 0 or above 64, an error is returned.

The errors that ParseInt returns have concrete type *NumError and include err.Num = s. If s is empty or contains invalid digits, err.Err = ErrSyntax and the returned value is 0; if the value corresponding to s cannot be represented by a signed integer of the given size, err.Err = ErrRange and the returned value is the maximum magnitude integer of the appropriate bitSize and sign.

[integer literals]: https://go.dev/ref/spec#Integer_literals

exampleParseInt

function exampleParseInt():Void {
        var _v32:stdgo.GoString = ("-354634382" : stdgo.GoString);
        {
            var __tmp__ = stdgo.strconv.Strconv.parseInt(_v32?.__copy__(), (10 : stdgo.GoInt), (32 : stdgo.GoInt)), _s:stdgo.GoInt64 = __tmp__._0, _err:stdgo.Error = __tmp__._1;
            if (_err == null) {
                stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
            };
        };
        {
            var __tmp__ = stdgo.strconv.Strconv.parseInt(_v32?.__copy__(), (16 : stdgo.GoInt), (32 : stdgo.GoInt)), _s:stdgo.GoInt64 = __tmp__._0, _err:stdgo.Error = __tmp__._1;
            if (_err == null) {
                stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
            };
        };
        var _v64:stdgo.GoString = ("-3546343826724305832" : stdgo.GoString);
        {
            var __tmp__ = stdgo.strconv.Strconv.parseInt(_v64?.__copy__(), (10 : stdgo.GoInt), (64 : stdgo.GoInt)), _s:stdgo.GoInt64 = __tmp__._0, _err:stdgo.Error = __tmp__._1;
            if (_err == null) {
                stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
            };
        };
        {
            var __tmp__ = stdgo.strconv.Strconv.parseInt(_v64?.__copy__(), (16 : stdgo.GoInt), (64 : stdgo.GoInt)), _s:stdgo.GoInt64 = __tmp__._0, _err:stdgo.Error = __tmp__._1;
            if (_err == null) {
                stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
            };
        };
    }

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function parseUint

function parseUint(_s:stdgo.GoString, _base:stdgo.GoInt, _bitSize:stdgo.GoInt):{
	_1:stdgo.Error;
	_0:stdgo.GoUInt64;
}

ParseUint is like ParseInt but for unsigned numbers.

A sign prefix is not permitted.

exampleParseUint

function exampleParseUint():Void {
        var _v:stdgo.GoString = ("42" : stdgo.GoString);
        {
            var __tmp__ = stdgo.strconv.Strconv.parseUint(_v?.__copy__(), (10 : stdgo.GoInt), (32 : stdgo.GoInt)), _s:stdgo.GoUInt64 = __tmp__._0, _err:stdgo.Error = __tmp__._1;
            if (_err == null) {
                stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
            };
        };
        {
            var __tmp__ = stdgo.strconv.Strconv.parseUint(_v?.__copy__(), (10 : stdgo.GoInt), (64 : stdgo.GoInt)), _s:stdgo.GoUInt64 = __tmp__._0, _err:stdgo.Error = __tmp__._1;
            if (_err == null) {
                stdgo.fmt.Fmt.printf(("%T, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_s));
            };
        };
    }

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function quote

function quote(_s:stdgo.GoString):stdgo.GoString

Quote returns a double-quoted Go string literal representing s. The returned string uses Go escape sequences (\t, \n, \xFF, \u0100) for control characters and non-printable characters as defined by IsPrint.

exampleQuote

function exampleQuote():Void {
        var _s:stdgo.GoString = stdgo.strconv.Strconv.quote(("\"Fran & Freddie\'s Diner\t☺\"" : stdgo.GoString))?.__copy__();
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(_s));
    }

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function quoteRune

function quoteRune(_r:stdgo.GoRune):stdgo.GoString

QuoteRune returns a single-quoted Go character literal representing the rune. The returned string uses Go escape sequences (\t, \n, \xFF, \u0100) for control characters and non-printable characters as defined by IsPrint. If r is not a valid Unicode code point, it is interpreted as the Unicode replacement character U+FFFD.

exampleQuoteRune

function exampleQuoteRune():Void {
        var _s:stdgo.GoString = stdgo.strconv.Strconv.quoteRune((9786 : stdgo.GoInt32))?.__copy__();
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(_s));
    }

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function quoteRuneToASCII

function quoteRuneToASCII(_r:stdgo.GoRune):stdgo.GoString

QuoteRuneToASCII returns a single-quoted Go character literal representing the rune. The returned string uses Go escape sequences (\t, \n, \xFF, \u0100) for non-ASCII characters and non-printable characters as defined by IsPrint. If r is not a valid Unicode code point, it is interpreted as the Unicode replacement character U+FFFD.

exampleQuoteRuneToASCII

function exampleQuoteRuneToASCII():Void {
        var _s:stdgo.GoString = stdgo.strconv.Strconv.quoteRuneToASCII((9786 : stdgo.GoInt32))?.__copy__();
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(_s));
    }

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function quoteRuneToGraphic

function quoteRuneToGraphic(_r:stdgo.GoRune):stdgo.GoString

QuoteRuneToGraphic returns a single-quoted Go character literal representing the rune. If the rune is not a Unicode graphic character, as defined by IsGraphic, the returned string will use a Go escape sequence (\t, \n, \xFF, \u0100). If r is not a valid Unicode code point, it is interpreted as the Unicode replacement character U+FFFD.

exampleQuoteRuneToGraphic

function exampleQuoteRuneToGraphic():Void {
        var _s:stdgo.GoString = stdgo.strconv.Strconv.quoteRuneToGraphic((9786 : stdgo.GoInt32))?.__copy__();
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(_s));
        _s = stdgo.strconv.Strconv.quoteRuneToGraphic((9786 : stdgo.GoInt32))?.__copy__();
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(_s));
        _s = stdgo.strconv.Strconv.quoteRuneToGraphic((10 : stdgo.GoInt32))?.__copy__();
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(_s));
        _s = stdgo.strconv.Strconv.quoteRuneToGraphic((9 : stdgo.GoInt32))?.__copy__();
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(_s));
    }

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function quoteToASCII

function quoteToASCII(_s:stdgo.GoString):stdgo.GoString

QuoteToASCII returns a double-quoted Go string literal representing s. The returned string uses Go escape sequences (\t, \n, \xFF, \u0100) for non-ASCII characters and non-printable characters as defined by IsPrint.

exampleQuoteToASCII

function exampleQuoteToASCII():Void {
        var _s:stdgo.GoString = stdgo.strconv.Strconv.quoteToASCII(("\"Fran & Freddie\'s Diner\t☺\"" : stdgo.GoString))?.__copy__();
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(_s));
    }

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function quoteToGraphic

function quoteToGraphic(_s:stdgo.GoString):stdgo.GoString

QuoteToGraphic returns a double-quoted Go string literal representing s. The returned string leaves Unicode graphic characters, as defined by IsGraphic, unchanged and uses Go escape sequences (\t, \n, \xFF, \u0100) for non-graphic characters.

exampleQuoteToGraphic

function exampleQuoteToGraphic():Void {
        var _s:stdgo.GoString = stdgo.strconv.Strconv.quoteToGraphic(("☺" : stdgo.GoString))?.__copy__();
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(_s));
        _s = stdgo.strconv.Strconv.quoteToGraphic(("This is a ☺\t\n" : stdgo.GoString))?.__copy__();
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(_s));
        _s = stdgo.strconv.Strconv.quoteToGraphic(("\" This is a ☺ \\n \"" : stdgo.GoString))?.__copy__();
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(_s));
    }

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function quotedPrefix

function quotedPrefix(_s:stdgo.GoString):{
	_1:stdgo.Error;
	_0:stdgo.GoString;
}

QuotedPrefix returns the quoted string (as understood by Unquote) at the prefix of s. If s does not start with a valid quoted string, QuotedPrefix returns an error.

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function setOptimize

function setOptimize(_b:Bool):Bool

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function unquote

function unquote(_s:stdgo.GoString):{
	_1:stdgo.Error;
	_0:stdgo.GoString;
}

Unquote interprets s as a single-quoted, double-quoted, or backquoted Go string literal, returning the string value that s quotes. (If s is single-quoted, it would be a Go character literal; Unquote returns the corresponding one-character string.)

exampleUnquote

function exampleUnquote():Void {
        var __tmp__ = stdgo.strconv.Strconv.unquote(("You can\'t unquote a string without quotes" : stdgo.GoString)), _s:stdgo.GoString = __tmp__._0, _err:stdgo.Error = __tmp__._1;
        stdgo.fmt.Fmt.printf(("%q, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_err));
        {
            var __tmp__ = stdgo.strconv.Strconv.unquote(("\"The string must be either double-quoted\"" : stdgo.GoString));
            _s = __tmp__._0?.__copy__();
            _err = __tmp__._1;
        };
        stdgo.fmt.Fmt.printf(("%q, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_err));
        {
            var __tmp__ = stdgo.strconv.Strconv.unquote(("`or backquoted.`" : stdgo.GoString));
            _s = __tmp__._0?.__copy__();
            _err = __tmp__._1;
        };
        stdgo.fmt.Fmt.printf(("%q, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_err));
        {
            var __tmp__ = stdgo.strconv.Strconv.unquote(("\'☺\'" : stdgo.GoString));
            _s = __tmp__._0?.__copy__();
            _err = __tmp__._1;
        };
        stdgo.fmt.Fmt.printf(("%q, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_err));
        {
            var __tmp__ = stdgo.strconv.Strconv.unquote(("\'☹☹\'" : stdgo.GoString));
            _s = __tmp__._0?.__copy__();
            _err = __tmp__._1;
        };
        stdgo.fmt.Fmt.printf(("%q, %v\n" : stdgo.GoString), stdgo.Go.toInterface(_s), stdgo.Go.toInterface(_err));
    }

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function unquoteChar

function unquoteChar(_s:stdgo.GoString, _quote:stdgo.GoByte):{
	_3:stdgo.Error;
	_2:stdgo.GoString;
	_1:Bool;
	_0:stdgo.GoRune;
}

UnquoteChar decodes the first character or byte in the escaped string or character literal represented by the string s. It returns four values: 

  1. value, the decoded Unicode code point or byte value;
  2. multibyte, a boolean indicating whether the decoded character requires a multibyte UTF-8 representation;
  3. tail, the remainder of the string after the character; and
  4. an error that will be nil if the character is syntactically valid.

The second argument, quote, specifies the type of literal being parsed and therefore which escaped quote character is permitted. If set to a single quote, it permits the sequence \' and disallows unescaped '. If set to a double quote, it permits \" and disallows unescaped ". If set to zero, it does not permit either escape and allows both quote characters to appear unescaped.

exampleUnquoteChar

function exampleUnquoteChar():Void {
        var __tmp__ = stdgo.strconv.Strconv.unquoteChar(("\\\"Fran & Freddie\'s Diner\\\"" : stdgo.GoString), (34 : stdgo.GoUInt8)), _v:stdgo.GoInt32 = __tmp__._0, _mb:Bool = __tmp__._1, _t:stdgo.GoString = __tmp__._2, _err:stdgo.Error = __tmp__._3;
        if (_err != null) {
            stdgo.log.Log.fatal(stdgo.Go.toInterface(_err));
        };
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(("value:" : stdgo.GoString)), stdgo.Go.toInterface((_v : stdgo.GoString)));
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(("multibyte:" : stdgo.GoString)), stdgo.Go.toInterface(_mb));
        stdgo.fmt.Fmt.println(stdgo.Go.toInterface(("tail:" : stdgo.GoString)), stdgo.Go.toInterface(_t));
    }

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Classes

import stdgo.strconv.*

class NumError

A NumError records a failed conversion. 

var err:stdgo.Error
var func:stdgo.GoString
var num:stdgo.GoString

NumError function new

function new(?func:stdgo.GoString, ?num:stdgo.GoString, ?err:Null<stdgo.Error>):Void

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NumError function error

function error():stdgo.GoString

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NumError function unwrap

function unwrap():stdgo.Error

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