class SubRegIndex { .....} 是什么语法

[Panda_熊猫]

如题。
不像是类模板啊，没有template。
类模板必须要有 template吗？

希望能讲的详细一些，谢谢。

[小鬼小鬼小鬼啊]

类模版知识啊 见下面链接 http://www.cnblogs.com/gaojun/archive/2010/09/10/1823354.html

[turing-complete]

问：是什么语法？ 答：是错误的语法。

[Panda_熊猫]

是泛型 还是模板？

[Panda_熊猫]

引用 1 楼 u010027950 的回复:

类模版知识啊 见下面链接 http://www.cnblogs.com/gaojun/archive/2010/09/10/1823354.html

没有template关键字，好像不是模板

[Panda_熊猫]

引用 2 楼 mougaidong 的回复:

问：是什么语法？ 答：是错误的语法。

求正确写法啊，我是copy的一段代码，可能不完整把。 求指教。求多码字。

[turing-complete]

http://en.cppreference.com/w/cpp/language/partial_specialization

[Panda_熊猫]

引用 2 楼 mougaidong 的回复:

问：是什么语法？ 答：是错误的语法。

您说的应该是对的。

//===- Target.td - Target Independent TableGen interface ---*- tablegen -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the target-independent interfaces which should be
// implemented by each target which is using a TableGen based code generator.
//
//===----------------------------------------------------------------------===//

// Include all information about LLVM intrinsics.
include "llvm/IR/Intrinsics.td"

//===----------------------------------------------------------------------===//
// Register file description - These classes are used to fill in the target
// description classes.

class RegisterClass; // Forward def

// SubRegIndex - Use instances of SubRegIndex to identify subregisters.
class SubRegIndex<int size, int offset = 0> {
  string Namespace = "";

  // Size - Size (in bits) of the sub-registers represented by this index.
  int Size = size;

  // Offset - Offset of the first bit that is part of this sub-register index.
  // Set it to -1 if the same index is used to represent sub-registers that can
  // be at different offsets (for example when using an index to access an
  // element in a register tuple).
  int Offset = offset;

  // ComposedOf - A list of two SubRegIndex instances, [A, B].
  // This indicates that this SubRegIndex is the result of composing A and B.
  // See ComposedSubRegIndex.
  list<SubRegIndex> ComposedOf = [];

  // CoveringSubRegIndices - A list of two or more sub-register indexes that
  // cover this sub-register.
  //
  // This field should normally be left blank as TableGen can infer it.
  //
  // TableGen automatically detects sub-registers that straddle the registers
  // in the SubRegs field of a Register definition. For example:
  //
  //   Q0    = dsub_0 -> D0, dsub_1 -> D1
  //   Q1    = dsub_0 -> D2, dsub_1 -> D3
  //   D1_D2 = dsub_0 -> D1, dsub_1 -> D2
  //   QQ0   = qsub_0 -> Q0, qsub_1 -> Q1
  //
  // TableGen will infer that D1_D2 is a sub-register of QQ0. It will be given
  // the synthetic index dsub_1_dsub_2 unless some SubRegIndex is defined with
  // CoveringSubRegIndices = [dsub_1, dsub_2].
  list<SubRegIndex> CoveringSubRegIndices = [];
}

上面的代码来自一个.td 文件。好像有td文件对应的解释器