This commit is contained in:
nlohmann
2026-10-07 06:52:50 +00:00
parent 42b1d75fff
commit 6cba066a3f
9 changed files with 307 additions and 293 deletions
+2 -2
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@@ -9,10 +9,10 @@ enum class cbor_tag_handler_t
};
```
This enumeration is used in the [`from_cbor`](from_cbor.md) function to choose how to treat tags:
This enumeration is used in [`from_cbor`](from_cbor.md) and [`sax_parse`](sax_parse.md) to choose how to treat tags:
error
: throw a `parse_error` exception in case of a tag
: report a parse error in case of a tag (the `from_cbor` overloads throw a `parse_error` exception by default)
ignore
: ignore tags
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@@ -9,9 +9,9 @@ enum class cbor_tag_handler_t
};
```
This enumeration is used in the [`from_cbor`](https://json.nlohmann.me/api/basic_json/from_cbor/index.md) function to choose how to treat tags:
This enumeration is used in [`from_cbor`](https://json.nlohmann.me/api/basic_json/from_cbor/index.md) and [`sax_parse`](https://json.nlohmann.me/api/basic_json/sax_parse/index.md) to choose how to treat tags:
error : throw a `parse_error` exception in case of a tag
error : report a parse error in case of a tag (the `from_cbor` overloads throw a `parse_error` exception by default)
ignore : ignore tags
+10 -3
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@@ -8,7 +8,8 @@ static bool sax_parse(InputType&& i,
input_format_t format = input_format_t::json,
const bool strict = true,
const bool ignore_comments = false,
const bool ignore_trailing_commas = false);
const bool ignore_trailing_commas = false,
const cbor_tag_handler_t tag_handler = cbor_tag_handler_t::error);
// (2)
template<class IteratorType, class SAX, class SentinelType = IteratorType>
@@ -17,13 +18,14 @@ static bool sax_parse(IteratorType first, SentinelType last,
input_format_t format = input_format_t::json,
const bool strict = true,
const bool ignore_comments = false,
const bool ignore_trailing_commas = false);
const bool ignore_trailing_commas = false,
const cbor_tag_handler_t tag_handler = cbor_tag_handler_t::error);
```
Read from input and generate SAX events
1. Read from a compatible input.
2. Read from a pair of character iterators, or an iterator and a sentinel of a different type (C++20 ranges support)
2. Read from a pair of character iterators, or an iterator and a sentinel of a different type (C++20 ranges support).
The value_type of the iterator must be an integral type with a size of 1, 2, or 4 bytes, which will be interpreted
respectively as UTF-8, UTF-16, and UTF-32. If `SentinelType` differs from `IteratorType`, it must be comparable to
@@ -82,6 +84,10 @@ The SAX event lister must follow the interface of [`json_sax`](../json_sax/index
: whether trailing commas in arrays or objects should be ignored and treated like whitespace (`#!cpp true`) or yield a parse error
(`#!cpp false`); (optional, `#!cpp false` by default)
`tag_handler` (in)
: how to handle CBOR tags; see [`cbor_tag_handler_t`](cbor_tag_handler_t.md). Ignored for formats other than CBOR
(optional, `cbor_tag_handler_t::error` by default).
`first` (in)
: iterator to the start of a character range
@@ -137,6 +143,7 @@ A UTF-8 byte order mark is silently ignored.
- Added in version 3.2.0.
- Ignoring comments via `ignore_comments` added in version 3.9.0.
- Added `ignore_trailing_commas` in version 3.13.0.
- Added `tag_handler` in version 3.13.0.
- Extended container support (1) to include types with lvalue-only ADL `begin`/`end` (matching `std::begin`/`std::end` semantics) in version 3.13.0.
- Extended overload (2) to accept heterogeneous iterator+sentinel pairs (C++20 ranges support) in version 3.13.0.
- `JSON_PRECISE_STREAM_POSITION` added in version 3.13.0 to optionally leave a `#!cpp std::istream` positioned right
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@@ -8,7 +8,8 @@ static bool sax_parse(InputType&& i,
input_format_t format = input_format_t::json,
const bool strict = true,
const bool ignore_comments = false,
const bool ignore_trailing_commas = false);
const bool ignore_trailing_commas = false,
const cbor_tag_handler_t tag_handler = cbor_tag_handler_t::error);
// (2)
template<class IteratorType, class SAX, class SentinelType = IteratorType>
@@ -17,14 +18,15 @@ static bool sax_parse(IteratorType first, SentinelType last,
input_format_t format = input_format_t::json,
const bool strict = true,
const bool ignore_comments = false,
const bool ignore_trailing_commas = false);
const bool ignore_trailing_commas = false,
const cbor_tag_handler_t tag_handler = cbor_tag_handler_t::error);
```
Read from input and generate SAX events
1. Read from a compatible input.
1. Read from a pair of character iterators, or an iterator and a sentinel of a different type (C++20 ranges support)
1. Read from a pair of character iterators, or an iterator and a sentinel of a different type (C++20 ranges support).
The value_type of the iterator must be an integral type with a size of 1, 2, or 4 bytes, which will be interpreted respectively as UTF-8, UTF-16, and UTF-32. If `SentinelType` differs from `IteratorType`, it must be comparable to the iterator type with `operator!=`.
@@ -68,6 +70,8 @@ The SAX event lister must follow the interface of [`json_sax`](https://json.nloh
`ignore_trailing_commas` (in) : whether trailing commas in arrays or objects should be ignored and treated like whitespace (`true`) or yield a parse error (`false`); (optional, `false` by default)
`tag_handler` (in) : how to handle CBOR tags; see [`cbor_tag_handler_t`](https://json.nlohmann.me/api/basic_json/cbor_tag_handler_t/index.md). Ignored for formats other than CBOR (optional, `cbor_tag_handler_t::error` by default).
`first` (in) : iterator to the start of a character range
`last` (in) : iterator to the end of a character range, or a sentinel value that compares equal to the end iterator with `operator!=`
@@ -284,6 +288,7 @@ result: false
- Added in version 3.2.0.
- Ignoring comments via `ignore_comments` added in version 3.9.0.
- Added `ignore_trailing_commas` in version 3.13.0 unreleased.
- Added `tag_handler` in version 3.13.0 unreleased.
- Extended container support (1) to include types with lvalue-only ADL `begin`/`end` (matching `std::begin`/`std::end` semantics) in version 3.13.0 unreleased.
- Extended overload (2) to accept heterogeneous iterator+sentinel pairs (C++20 ranges support) in version 3.13.0 unreleased.
- `JSON_PRECISE_STREAM_POSITION` added in version 3.13.0 unreleased to optionally leave a `std::istream` positioned right after the parsed value when `strict` is `false`.
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