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[sample] re #370: add quickstart example for emitting in flow style

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This commit is contained in:
Joao Paulo Magalhaes
2023-05-11 13:24:49 +01:00
parent ff1a9858b1
commit 9fd8555ce4
2 changed files with 54 additions and 1 deletions
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53
samples/quickstart.cpp
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@@ -74,6 +74,7 @@ void sample_emit_to_container(); ///< emit to memory, eg a string or vector-l
void sample_emit_to_stream(); ///< emit to a stream, eg std::ostream
void sample_emit_to_file(); ///< emit to a FILE*
void sample_emit_nested_node(); ///< pick a nested node as the root when emitting
void sample_emit_style(); ///< set the nodes to FLOW/BLOCK format
void sample_json(); ///< JSON parsing and emitting
void sample_anchors_and_aliases(); ///< deal with YAML anchors and aliases
void sample_tags(); ///< deal with YAML type tags
@@ -109,6 +110,7 @@ int main()
sample::sample_emit_to_stream();
sample::sample_emit_to_file();
sample::sample_emit_nested_node();
sample::sample_emit_style();
sample::sample_json();
sample::sample_anchors_and_aliases();
sample::sample_tags();
@@ -3356,6 +3358,57 @@ void sample_emit_nested_node()
}
//-----------------------------------------------------------------------------
/** [experimental] pick flow/block style for certain nodes. */
void sample_emit_style()
{
ryml::Tree tree = ryml::parse_in_arena(R"(
NodeOne:
- key: a
desc: b
class: c
number: d
- key: e
desc: f
class: g
number: h
- key: i
desc: j
class: k
number: l
)");
// ryml uses block style by default:
CHECK(ryml::emitrs_yaml<std::string>(tree) == R"(NodeOne:
- key: a
desc: b
class: c
number: d
- key: e
desc: f
class: g
number: h
- key: i
desc: j
class: k
number: l
)");
// you can override the emit style of individual nodes:
for(ryml::NodeRef child : tree["NodeOne"].children())
child |= ryml::_WIP_STYLE_FLOW_SL; // flow, single-line
CHECK(ryml::emitrs_yaml<std::string>(tree) == R"(NodeOne:
- {key: a,desc: b,class: c,number: d}
- {key: e,desc: f,class: g,number: h}
- {key: i,desc: j,class: k,number: l}
)");
tree["NodeOne"] |= ryml::_WIP_STYLE_FLOW_SL;
CHECK(ryml::emitrs_yaml<std::string>(tree) == R"(NodeOne: [{key: a,desc: b,class: c,number: d},{key: e,desc: f,class: g,number: h},{key: i,desc: j,class: k,number: l}]
)");
tree.rootref() |= ryml::_WIP_STYLE_FLOW_SL;
CHECK(ryml::emitrs_yaml<std::string>(tree) == R"({{NodeOne: [{key: a,desc: b,class: c,number: d},{key: e,desc: f,class: g,number: h},{key: i,desc: j,class: k,number: l}]})");
}
//-----------------------------------------------------------------------------

2
src/c4/yml/tree.hpp
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@@ -170,7 +170,7 @@ typedef enum : type_bits {
DOCVAL = DOC|VAL,
_KEYMASK = KEY | KEYQUO | KEYANCH | KEYREF | KEYTAG,
_VALMASK = VAL | VALQUO | VALANCH | VALREF | VALTAG,
// these flags are from a work in progress and should not be used yet
// these flags are from a work in progress and should be used with care
_WIP_STYLE_FLOW_SL = c4bit(14), ///< mark container with single-line flow format (seqs as '[val1,val2], maps as '{key: val, key2: val2}')
_WIP_STYLE_FLOW_ML = c4bit(15), ///< mark container with multi-line flow format (seqs as '[val1,\nval2], maps as '{key: val,\nkey2: val2}')
_WIP_STYLE_BLOCK = c4bit(16), ///< mark container with block format (seqs as '- val\n', maps as 'key: val')