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strconv: fix documentation
Also: minor performance fix for large precision results. benchmark old ns/op new ns/op delta strconv_test.BenchmarkFormatFloatDecimal 2734 2734 +0.00% strconv_test.BenchmarkFormatFloat 3141 3139 -0.06% strconv_test.BenchmarkFormatFloatExp 8970 8989 +0.21% strconv_test.BenchmarkFormatFloatBig 3228 3208 -0.62% Fixes #2535. R=rsc CC=golang-dev https://golang.org/cl/5435089
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@ -119,10 +119,10 @@ Error:
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return n, &NumError{s0, err}
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}
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// ParseInt interprets a string s in an arbitrary base b (2 to 36)
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// and returns the corresponding value n. If b == 0, the base
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// is taken from the string prefix: base 16 for "0x", base 8 for "0",
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// and base 10 otherwise.
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// ParseInt interprets a string s in the given base (2 to 36) and
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// returns the corresponding value i. If base == 0, the base is
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// implied by the string's prefix: base 16 for "0x", base 8 for
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// "0", and base 10 otherwise.
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//
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// The bitSize argument specifies the integer type
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// that the result must fit into. Bit sizes 0, 8, 16, 32, and 64
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@ -46,7 +46,7 @@ var float64info = floatInfo{52, 11, -1023}
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// because correct rounding and the number of digits
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// needed to identify f depend on the precision of the representation.
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func FormatFloat(f float64, fmt byte, prec, bitSize int) string {
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return string(genericFtoa(make([]byte, 0, 16), f, fmt, prec, bitSize))
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return string(genericFtoa(make([]byte, 0, max(prec+4, 24)), f, fmt, prec, bitSize))
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}
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// AppendFloat appends the string form of the floating-point number f,
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