Inconsistent generator naming

[grigorymx]

While investigating the source code, I've found several generators with the inconsistent names.

In file pcg_random.hpp on line 1724

typedef pcg_engines::ext_setseq_xsh_rr_64_32<6,16,true>     pcg32_k64;
typedef pcg_engines::ext_mcg_xsh_rs_64_32<6,32,true>        pcg32_k64_oneseq;
typedef pcg_engines::ext_oneseq_xsh_rs_64_32<6,32,true>     pcg32_k64_fast;

pcg32_k64_oneseq is based on the mcg, and pcg32_k64_fast is based on the oneseq generator.

But on line 1732

typedef pcg_engines::ext_setseq_xsl_rr_128_64<5,16,true>    pcg64_k32;
typedef pcg_engines::ext_oneseq_xsl_rr_128_64<5,128,true>   pcg64_k32_oneseq;
typedef pcg_engines::ext_mcg_xsl_rr_128_64<5,128,true>      pcg64_k32_fast;

pcg64_k32_oneseq is based on the oneseq generator, and pcg64_k32_fast is based on the mcg.

After further investigation, I discovered the following.
The base generator are declared as follows (line 1686)

typedef pcg_engines::setseq_xsh_rr_64_32        pcg32;
typedef pcg_engines::oneseq_xsh_rr_64_32        pcg32_oneseq;
typedef pcg_engines::unique_xsh_rr_64_32        pcg32_unique;
typedef pcg_engines::mcg_xsh_rs_64_32           pcg32_fast;

Where pcg32_oneseq is based on oneseq generator and pcg32_fast is based on mcg generator.
But multiple extended fast generators (pcg32_k2_fast, pcg32_k64_fast, pcg32_k1024_fast, pcg32_c1024_fast, pcg64_k1024_fast, pcg64_c1024_fast, pcg32_k16384_fast) are based on oneseq generator while other fast generators (pcg32_c64_fast, pcg64_k32_fast, pcg64_c32_fast) are based on mcg.