56 lines
1.2 KiB
C++
56 lines
1.2 KiB
C++
#include "lix/libexpr/attr-set.hh"
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#include "lix/libexpr/eval.hh"
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#include "lix/libexpr/gc-alloc.hh"
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#include <algorithm>
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namespace nix {
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Bindings Bindings::EMPTY{0};
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/* Allocate a new array of attributes for an attribute set with a specific
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capacity. The space is implicitly reserved after the Bindings
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structure. */
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Bindings * EvalMemory::allocBindings(size_t capacity)
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{
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if (capacity == 0)
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return &Bindings::EMPTY;
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if (capacity > std::numeric_limits<Bindings::size_t>::max())
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throw Error("attribute set of size %d is too big", capacity);
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stats.nrAttrsets++;
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stats.nrAttrsInAttrsets += capacity;
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return new (gcAllocBytes(sizeof(Bindings) + sizeof(Attr) * capacity)) Bindings((Bindings::size_t) capacity);
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}
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Value & BindingsBuilder::alloc(Symbol name, PosIdx pos)
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{
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auto value = mem.allocValue();
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bindings->push_back(Attr(name, value, pos));
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return *value;
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}
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Value & BindingsBuilder::alloc(std::string_view name, PosIdx pos)
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{
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return alloc(symbols.create(name), pos);
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}
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void Bindings::sort()
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{
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if (size_) std::sort(begin(), end());
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}
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Value & Value::mkAttrs(BindingsBuilder & bindings)
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{
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mkAttrs(bindings.finish());
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return *this;
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}
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}
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