### Clarify content regarding operators

```- Explicitly mention that there are no default conversions.
- Clarify that binary operations are on like types.
- Clarify requirements for the ternary operator and add an example.

Asserting that the clarified content is clear enough,
Fixes #11.

Signed-off-by: Paul A. Clarke <pc@us.ibm.com>``` Paul Clarke 3 years ago committed by Bill Schmidt
 `@ -188,7 +188,8 @@ vector unsigned __int128 x = { (((unsigned __int128)0x1020304050607080) <<` @@ -188,7 +188,8 @@ vector unsigned __int128 x = { (((unsigned __int128)0x1020304050607080) << ` ` ` One vector type may be cast to another vector type without` ` restriction. Such a cast is simply a reinterpretation of the` ` bits, and does not change the data.` ` bits, and does not change the data. There are no default` ` conversions for vector types.` ` ` ` ` ` Compilers are expected to recognize and optimize multiple` `@ -495,12 +496,14 @@ register vector double vd = vec_splats(*double_ptr);` @@ -495,12 +496,14 @@ register vector double vd = vec_splats(*double_ptr); ` valid for pointers to vector types.` ` ` ` ` ` The traditional C/C++ operators are defined on vector types` ` for unary and binary +,` ` unary and binary –, binary *, binary` ` %, and binary / as well as the unary` ` and binary shift, logical and comparison operators, and the` ` ternary ?: operator. These operators perform their` ` The traditional C/C++ unary operators (+` ` -, and ~), are defined on vector types.` ` The traditional C/C++ binary operators (+,` ` -, *, %, /,` ` shift, logical, and comparison) and the ternary operator` ` (?:)` ` are defined on like vector types.` ` Other than ?:, these operators perform their` ` operations "elementwise" on the base elements of the operands,` ` as follows.` ` ` `@ -533,6 +536,27 @@ a = a + b;` @@ -533,6 +536,27 @@ a = a + b; ` ` ` vector signed int a, b;` `a = vec_add (a, b);` ` ` ` For the ternary operator (?:), the first operand must` ` be an integral type, used to select between the second and third` ` operands which must be of the same vector type.` ` The result of the ternary operator will also have that type.` ` For example,` ` ` `int test_value;` `vector signed int a, b, r;` `r = test_value ? a : b;` ` ` ` produces the same result as` ` ` `int test_value;` `vector signed int a, b, r;` `if (test_value)` ` r = a;` `else` ` r = b;` ` ` ` ` ` ` ` Further, the array reference operator may be applied to vector` ` data types, yielding an l-value corresponding to the specified`