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Add builtin function ‘fromJSON’

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Fixes #294.
This commit is contained in:
Eelco Dolstra 2014-07-04 13:34:15 +02:00
parent e82951fe23
commit beaf3e90af
6 changed files with 217 additions and 0 deletions
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10
src/libexpr/primops.cc
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@ -6,6 +6,7 @@
#include "archive.hh"
#include "value-to-xml.hh"
#include "value-to-json.hh"
#include "json-to-value.hh"
#include "names.hh"
#include "eval-inline.hh"
@ -775,6 +776,14 @@ static void prim_toJSON(EvalState & state, const Pos & pos, Value * * args, Valu
}
/* Parse a JSON string to a value. */
static void prim_fromJSON(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
string s = state.forceStringNoCtx(*args[0], pos);
parseJSON(state, s, v);
}
/* Store a string in the Nix store as a source file that can be used
as an input by derivations. */
static void prim_toFile(EvalState & state, const Pos & pos, Value * * args, Value & v)
@ -1396,6 +1405,7 @@ void EvalState::createBaseEnv()
// Creating files
addPrimOp("__toXML", 1, prim_toXML);
addPrimOp("__toJSON", 1, prim_toJSON);
addPrimOp("__fromJSON", 1, prim_fromJSON);
addPrimOp("__toFile", 2, prim_toFile);
addPrimOp("__filterSource", 2, prim_filterSource);