const限定するだけの関数

• Boost.Lambdaにmake_constがあった
• もっと汎用的にhelp_rvalue_deductionというのがBoost.Phoenix-2にある
  • こちらと関係あるのかもしれない
  • Boost.Phoenix-2のドキュメントは分かりやすいです

[]#include[] []<boost/test/minimal.hpp>[]

[]#include[] []<boost/lambda/core.hpp>[] []// make_const[]

[]// See: <boost/spirit/phoenix/function/detail/function_eval.hpp>[]

[]//[]

[]template[][]< [][]class[] []T[][]>[]

[]T[][]& [][]help_rvalue_deduction[][]([][]T[][]& [][]x[][])[]

[]{[]

    []return[] []x[][];[]

[]}[]
[]template[][]< [][]class[] []T[][] >[]

[]const[] []T[][]& [][]help_rvalue_deduction[][]([][]const[] []T[][]& [][]x[][])[]

[]{[]

    []return[] []x[][];[]

[]}[]


[]template[][]< [][]class[] []T[][] >[]

[]void[] []foo[][]([][]T[][]& [][]x[][])[]

[]{ }[]


[]template[][]< [][]class[] []T[][] >[]

[]bool[] []bar[][]([][]T[][]& [][]x[][])[]

[]{[]

    []return[][] ([][]x[][] = [][]2[][]); [][]// typo![]

[]}[]


[]void[] []test_2006_03_03[][]()[]

[]{[]

    []using[] []namespace[] []boost[][];[]


    []int[] []x[][];[]

[]    ::[][]foo[][]([][]lambda[][]::[][]make_const[][]([][]1[][]));[]

    []// ::bar(lambda::make_const(x)); // error[]
[]    ::[][]foo[][](::[][]help_rvalue_deduction[][]([][]x[][]));[]

[]    ::[][]foo[][](::[][]help_rvalue_deduction[][]([][]1[][]));[]

[]}[]


[]int[] []test_main[][]([][]int[][], [][]char[][]*[])[]

[]{[]

    []test_2006_03_03[][]();[]

    []return[] []0[][];[]

[]}[]