[PATCH] D46209: [Support] Make JSON handle doubles and int64s losslessly

[Sam McCall via Phabricator via llvm-commits]

sammccall created this revision.
sammccall added a reviewer: simon_tatham.
Herald added a subscriber: llvm-commits.

This patch adds a new "integer" ValueType, and renames Number -> Double.
This allows us to preserve the full precision of int64_t when parsing integers
from the wire, or constructing from an integer.
The API is unchanged, other than giving asInteger() a clearer contract.

In addition, always output doubles with enough precision that parsing will
reconstruct the same double.


Repository:
  rL LLVM

https://reviews.llvm.org/D46209

Files:
  include/llvm/Support/JSON.h
  lib/Support/JSON.cpp
  unittests/Support/JSONTest.cpp

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