Augment NumTraits with min/max_exponent() again.

Replace usage of `std::numeric_limits<...>::min/max_exponent` in
codebase where possible.  Also replaced some other `numeric_limits`
usages in affected tests with the `NumTraits` equivalent.

The previous MR !443 failed for c++03 due to lack of `constexpr`.
Because of this, we need to keep around the `std::numeric_limits`
version in enum expressions until the switch to c++11.

Fixes #2148

1 files changed, 6 insertions, 6 deletions

diff --git a/bench/bench_norm.cpp b/bench/bench_norm.cpp
index a86153945..592f25d66 100644
--- a/bench/bench_norm.cpp
+++ b/bench/bench_norm.cpp
@@ -111,12 +111,12 @@ EIGEN_DONT_INLINE typename T::Scalar pblueNorm(const T& v)
     int nbig, ibeta, it, iemin, iemax, iexp;
     Scalar abig, eps;
 
-    nbig  = std::numeric_limits<int>::max();            // largest integer
-    ibeta = std::numeric_limits<Scalar>::radix; //NumTraits<Scalar>::Base;                    // base for floating-point numbers
-    it    = std::numeric_limits<Scalar>::digits; //NumTraits<Scalar>::Mantissa;                // number of base-beta digits in mantissa
-    iemin = std::numeric_limits<Scalar>::min_exponent;  // minimum exponent
-    iemax = std::numeric_limits<Scalar>::max_exponent;  // maximum exponent
-    rbig  = std::numeric_limits<Scalar>::max();         // largest floating-point number
+    nbig  = NumTraits<int>::highest();          // largest integer
+    ibeta = std::numeric_limits<Scalar>::radix; // NumTraits<Scalar>::Base;                    // base for floating-point numbers
+    it    = NumTraits<Scalar>::digits();        // NumTraits<Scalar>::Mantissa;                // number of base-beta digits in mantissa
+    iemin = NumTraits<Scalar>::min_exponent();  // minimum exponent
+    iemax = NumTraits<Scalar>::max_exponent();  // maximum exponent
+    rbig  = NumTraits<Scalar>::highest();       // largest floating-point number
 
     // Check the basic machine-dependent constants.
     if(iemin > 1 - 2*it || 1+it>iemax || (it==2 && ibeta<5)