forked from lix-project/lix
71 lines
1.5 KiB
C++
71 lines
1.5 KiB
C++
#include "attr-set.hh"
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#include "eval-inline.hh"
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#include <algorithm>
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namespace nix {
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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 * EvalState::allocBindings(size_t capacity)
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{
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if (capacity == 0)
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return &emptyBindings;
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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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nrAttrsets++;
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nrAttrsInAttrsets += capacity;
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return new (allocBytes(sizeof(Bindings) + sizeof(Attr) * capacity)) Bindings((Bindings::size_t) capacity);
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}
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/* Create a new attribute named 'name' on an existing attribute set stored
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in 'vAttrs' and return the newly allocated Value which is associated with
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this attribute. */
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Value * EvalState::allocAttr(Value & vAttrs, Symbol name)
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{
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Value * v = allocValue();
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vAttrs.attrs->push_back(Attr(name, v));
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return v;
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}
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Value * EvalState::allocAttr(Value & vAttrs, std::string_view name)
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{
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return allocAttr(vAttrs, symbols.create(name));
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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 = state.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(state.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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