tree 1168e8456ab49c55ff2f47c9b98a7a0feff69204
parent dff0ae5b48201537496c261571cf1f08725ec804
author alandonovan <adonovan@google.com> 1605114221 -0500
committer GitHub <noreply@github.com> 1605114221 -0500
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starlark: bring floating-point into spec compliance (#313)

This change makes go.starlark.net's floating-point implementation
match the proposed spec (see https://github.com/bazelbuild/starlark/pull/119),
and thus much more closely match the behavior of the Java implementation.

The major changes are:
- Float values are totally ordered; NaN compares greater than +Inf.
- The string form of a finite float value always contains an exponent
  or a decimal point, so they are self-evidently not int values.
- Operations that would cause a large integer to become rounded to
  an infinite float are now an error.

The resolve.AllowFloat boolean, and the corresponding -float command-line
flag, now have no effect. Floating point support is always enabled.