eldritch horrors
56df5ba164
we can merge it into json.hh instead. Change-Id: Ic40c25fa759bf52bb69eae5d7c0597f260fd94a6
44 lines
906 B
C++
44 lines
906 B
C++
#include "lix/libutil/json.hh"
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#include "lix/libutil/error.hh"
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namespace nix {
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const JSON * get(const JSON & map, const std::string & key)
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{
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auto i = map.find(key);
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if (i == map.end()) return nullptr;
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return &*i;
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}
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JSON * get(JSON & map, const std::string & key)
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{
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auto i = map.find(key);
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if (i == map.end()) return nullptr;
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return &*i;
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}
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const JSON & valueAt(
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const JSON & map,
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const std::string & key)
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{
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if (!map.contains(key))
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throw Error("Expected JSON object to contain key '%s' but it doesn't", key);
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return map[key];
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}
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const JSON & ensureType(
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const JSON & value,
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JSON::value_type expectedType
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)
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{
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if (value.type() != expectedType)
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throw Error(
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"Expected JSON value to be of type '%s' but it is of type '%s'",
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JSON(expectedType).type_name(),
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value.type_name());
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return value;
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}
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}
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