rcl/rcl_yaml_param_parser/README.md

**ROS2 rcl YAML paramter parser**

Parse a YAML parameter file and populate the C data structure

The data structure params_st will then be used during node initialization

YAML parameter file should follow the yaml syntax shown below

NOTE: It only supports canonical int and float types

```
<node_namespace_string>:  # optional
  <node1_name>:
    params:
      <field_name>: <field_value>
      <parameter_namespace_string>:   # optional
        <field1_name>: <field1_value>
        <field2_name>: <field2_value>
  <node2_name>:
    params:
      <field_name>: <field_value>
      <parameter_namespace_string>:   # optional
        <field1_name>: <field1_value>
        <field2_name>: <field2_value>
```

This package depends on C libyaml
YAML parameter parser (#235) * Implement a basic YAML based parameter parser for ros2 nodes * Add README file * Fix the issues after moving from rcutils_yaml_param_parser to rcl_yaml_param_parser - rename folders from rcutils_yaml_param_parser to rcl_yaml_param_parser - rename project, header guards and include statements from rcutils_yaml_param_parser to rcl_yaml_param_parser - move type declaration in separat file and namespace new structures - Fix the code review comments from Mikael * Few minor changes - Changed "params" string to "ros__parameters" - Add -Wall, -Wextra and -Wpedantic falgs - Fix the compile warning with the new flags * Fix the changes made in the design of C structure - Remove the node_namespaces entry in rcl_params_t - Change the type of num_nodes and num_params to size_t * depend on libyaml_vendor (#236) * Fix cmake setting standard(C and C++) and add byte_array in C struct * Remove C11 so that it defaults to C99 * [rcl_yaml_param_parser] fix export symbols (#237) * add visibility macros * remove unused macro * Support for multi level node and parameter name spaces * Additional fixes and cleanups - Support for string namespace seperator - Provide parameter structure init function API - name cleanups * off by 1 * Call yaml_parser_delete() * fclose(yaml_file) * free() allocated paths * Call yaml_event_delete() * completely deallcoate string array * Few cleanup changes - Add install command into CMakelists.txt - Replace one of the zero_allocate with reallocate - Pass allocator state - Fix int32_t -> rcl_ret_t return value * Don't include unistd.h * Use size_t for array indices * Just pass the allocator in the init function 2018-05-29 09:07:02 -07:00			`ROS2 rcl YAML paramter parser`

			`Parse a YAML parameter file and populate the C data structure`

			`The data structure params_st will then be used during node initialization`

			`YAML parameter file should follow the yaml syntax shown below`

			`NOTE: It only supports canonical int and float types`

			```
			`<node_namespace_string>: # optional`
			`<node1_name>:`
			`params:`
			`<field_name>: <field_value>`
			`<parameter_namespace_string>: # optional`
			`<field1_name>: <field1_value>`
			`<field2_name>: <field2_value>`
			`<node2_name>:`
			`params:`
			`<field_name>: <field_value>`
			`<parameter_namespace_string>: # optional`
			`<field1_name>: <field1_value>`
			`<field2_name>: <field2_value>`
			```

			`This package depends on C libyaml`