diff options
author | Benjamin Barenblat <bbaren@mit.edu> | 2016-05-30 17:58:02 -0400 |
---|---|---|
committer | Benjamin Barenblat <bbaren@mit.edu> | 2016-05-30 17:58:02 -0400 |
commit | e67c951ad9c5c637e36a6f025ba3d6e3ad945416 (patch) | |
tree | 0cfb5c339602e4bdebf4bf97f3f0ccc3923c14d1 /Source/Dafny/BigIntegerParser.cs | |
parent | 000aa762e1fee4b9bd83ec3d7c8b61fd203e2c9d (diff) | |
parent | df5c5f547990c1f80ab7594a1f9287ee03a61754 (diff) |
Merge commit 'df5c5f5'
Diffstat (limited to 'Source/Dafny/BigIntegerParser.cs')
-rw-r--r-- | Source/Dafny/BigIntegerParser.cs | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/Source/Dafny/BigIntegerParser.cs b/Source/Dafny/BigIntegerParser.cs new file mode 100644 index 00000000..cd2cf314 --- /dev/null +++ b/Source/Dafny/BigIntegerParser.cs @@ -0,0 +1,27 @@ +using System; +using System.Numerics; +using System.Globalization; + +namespace Microsoft.Dafny { + internal static class BigIntegerParser { + /// <summary> + /// Mono does not support the BigInteger.TryParse method. In practice, + /// we seldom actually need to parse huge integers, so it makes sense + /// to support most real-life cases by simply trying to parse using + /// Int64, and only falling back if needed. + /// </summary> + internal static BigInteger Parse(string str, NumberStyles style) { + UInt64 parsed; + if (UInt64.TryParse(str, style, NumberFormatInfo.CurrentInfo, out parsed)) { + return new BigInteger(parsed); + } else { + // Throws on Mono 3.2.8 + return BigInteger.Parse(str, style); + } + } + + internal static BigInteger Parse(string str) { + return BigIntegerParser.Parse(str, NumberStyles.Integer); + } + } +}
\ No newline at end of file |