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10 commits

Author SHA1 Message Date
John Ericson f4ab297b31 Ensure all headers have #pragma once and are in API docs 
`///@file` makes them show up in the internal API dos. A tiny few were
missing `#pragma once`.
 2023-03-31 23:19:44 -04:00
Yorick 09f00dd4d0
Replace src/libutil/json.cc with nlohmann json generation 2022-11-16 16:50:50 +01:00
Naïm Favier 062e4fcdde
JSON: print paths as strings without copying them to the store 
Makes `printValueAsJSON` not copy paths to the store for `nix eval
--json`, `nix-instantiate --eval --json` and `nix-env --json`.

Fixes https://github.com/NixOS/nix/issues/5612
 2022-08-22 15:01:35 +02:00
pennae 6526d1676b replace most Pos objects/ptrs with indexes into a position table 
Pos objects are somewhat wasteful as they duplicate the origin file name and
input type for each object. on files that produce more than one Pos when parsed
this a sizeable waste of memory (one pointer per Pos). the same goes for
ptr<Pos> on 64 bit machines: parsing enough source to require 8 bytes to locate
a position would need at least 8GB of input and 64GB of expression memory. it's
not likely that we'll hit that any time soon, so we can use a uint32_t index to
locate positions instead.
 2022-04-21 21:46:06 +02:00
Shay Bergmann ba81e871b2
toJSON: report error position for fancier output 
Given flake:

```nix
{ description = "nix json error provenance";
  inputs = {};
  outputs = { self }: {
    jsonFunction = _: "function";
    json = builtins.toJSON (_: "function");
  };
}

```
- Before:

```console
❯ nix eval --json .#jsonFunction
error: cannot convert a function to JSON
```

- After:

```console
❯ nix eval --json .#jsonFunction
error: cannot convert a function to JSON

       at /nix/store/b7imf1c2j4jnkg3ys7fsfbj02s5j0i4f-source/testflake/flake.nix:4:5:

            3|   outputs = { self }: {
            4|     jsonFunction = _: "function";
             |     ^
            5|     json = builtins.toJSON (_: "function");
```
 2021-10-25 21:17:52 +00:00
Eelco Dolstra c0a7b84748 nix path-info: Add --json flag 
Also, factor out JSON generation from value-to-json.{cc,hh}, and
support producing indented JSON.
 2016-08-29 17:29:24 +02:00
Eelco Dolstra 7a173a7be1 JSONObject: Support floats and booleans 2016-02-19 14:24:04 +01:00
Eelco Dolstra d61853430a Support control characters in JSON output 2014-09-30 00:41:18 +02:00
Eelco Dolstra 5fea98111b Refactor JSON output 2013-11-19 00:33:06 +01:00
Eelco Dolstra 77c13cdf56 Add a toJSON primop 2013-11-19 00:04:11 +01:00