Created
October 23, 2010 19:31
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enum N = 20; | |
alias Lambda!(int, N, // P = int, q = N | |
q{ | |
alias P[a][q] _; | |
}) | |
IntArray; | |
static assert(is(IntArray!(3) == int[3][N])); | |
alias Lambda!(3, // p = 3 | |
q{ | |
enum _ = p * a; | |
}) | |
triple; | |
static assert(triple!(11) == 33); | |
//----------------------------------------------------------------------------// | |
template Lambda(specs...) | |
{ | |
alias LambdaGen!(specs[ $ - 1], | |
specs[0 .. $ - 1]).Lambda Lambda; | |
} | |
private template LambdaGen(string decl, captures...) | |
{ | |
template Lambda(args...) | |
{ | |
alias _!args._ Lambda; | |
} | |
template _(args...) | |
{ | |
mixin injectParameters!(0, +args.length); | |
mixin injectCaptures !(0, +captures.length); | |
mixin injectBody; | |
} | |
mixin template injectBody() | |
{ | |
mixin(decl); | |
} | |
// Inject named parameter aliases: a-h. | |
mixin template injectParameters(size_t i, size_t n) | |
{ | |
static if (i < n && i < 8) | |
{ | |
mixin injectParameter !(i ); | |
mixin injectParameters!(i + 1, n); | |
} | |
} | |
mixin template injectParameter(size_t i) | |
{ | |
mixin("alias Id!(args[i]) "~ "abcdefgh"[i] ~"," | |
~ "ABCDEFGH"[i] ~";"); | |
} | |
// Inject named captures: p-w. | |
mixin template injectCaptures(size_t i, size_t n) | |
{ | |
static if (i < n && i < 8) | |
{ | |
mixin injectCapture !(i ); | |
mixin injectCaptures!(i + 1, n); | |
} | |
} | |
mixin template injectCapture(size_t i) | |
{ | |
mixin("alias Id!(captures[i]) "~ "pqrstuvw"[i] ~"," | |
~ "PQRSTUVW"[i] ~";"); | |
} | |
} | |
template Id( E) { alias E Id; } | |
template Id(alias E) { alias E Id; } |
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