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strconv: ParseFloat: always return ErrSyntax for bad syntax
Previously we would sometimes return ErrRange if the parseable part of the floating point number was out of range. Fixes #46628 Change-Id: I15bbbb1e2a56fa27c19fe25ab5554d988cbfd9d2 Reviewed-on: https://go-review.googlesource.com/c/go/+/325750 Trust: Ian Lance Taylor <iant@golang.org> Trust: Robert Griesemer <gri@golang.org> Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org>
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@ -689,7 +689,7 @@ func atof64(s string) (f float64, n int, err error) {
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// as their respective special floating point values. It ignores case when matching.
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func ParseFloat(s string, bitSize int) (float64, error) {
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f, n, err := parseFloatPrefix(s, bitSize)
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if err == nil && n != len(s) {
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if n != len(s) && (err == nil || err.(*NumError).Err != ErrSyntax) {
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return 0, syntaxError(fnParseFloat, s)
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}
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return f, err
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@ -342,6 +342,9 @@ var atoftests = []atofTest{
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{"0x12.345p-_12", "0", ErrSyntax},
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{"0x12.345p+1__2", "0", ErrSyntax},
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{"0x12.345p+12_", "0", ErrSyntax},
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{"1e100x", "0", ErrSyntax},
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{"1e1000x", "0", ErrSyntax},
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}
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var atof32tests = []atofTest{
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