A config_concatenation represents a list of values to be concatenated (see the spec). More...

Inheritance diagram for hocon::config_concatenation:

Public Types
enum	type { OBJECT, LIST, NUMBER, BOOLEAN, CONFIG_NULL, STRING, UNSPECIFIED }
	The type of a configuration value (following the JSON type schema). More...

Public Member Functions
	config_concatenation (shared_origin origin, std::vector< shared_value > pieces)

config_value::type	value_type () const override
	The type of the value; matches the JSON type schema. More...

std::vector< shared_value >	unmerged_values () const override

resolve_status	get_resolve_status () const override

shared_value	replace_child (shared_value const &child, shared_value replacement) const override
	Replace a child of this value. More...

bool	has_descendant (shared_value const &descendant) const override
	Super-expensive full traversal to see if descendant is anywhere underneath this container. More...

resolve_result< shared_value >	resolve_substitutions (resolve_context const &context, resolve_source const &source) const override

shared_value	relativized (std::string prefix) const override
	This is used when including one file in another; the included file is relativized to the path it's included into in the parent file. More...

unwrapped_value	unwrapped () const override

bool	operator== (config_value const &other) const override

virtual shared_origin const &	origin () const
	The origin of the value (file, line number, etc.), for debugging and error messages. More...

char const *	value_type_name () const
	The printable name of the value type. More...

virtual std::string	render () const
	Renders the config value as a HOCON string. More...

virtual std::string	render (config_render_options options) const
	Renders the config value to a string, using the provided options. More...

shared_config	at_key (std::string const &key) const
	Places the value inside a config at the given key. More...

shared_config	at_path (std::string const &path_expression) const
	Places the value inside a config at the given path. More...

virtual shared_value	with_origin (shared_origin origin) const
	Returns a. More...

std::shared_ptr< const config_mergeable >	with_fallback (std::shared_ptr< const config_mergeable > other) const override
	Returns a new value computed by merging this value with another, with keys in this value "winning" over the other one. More...

virtual std::string	transform_to_string () const

Static Public Member Functions
static std::vector< shared_value >	consolidate (std::vector< shared_value > pieces)

static shared_value	concatenate (std::vector< shared_value > pieces)

static char const *	type_name (type t)

Protected Member Functions
shared_value	new_copy (shared_origin origin) const override

bool	ignores_fallbacks () const override

void	render (std::string &result, int indent, bool at_root, config_render_options options) const override

virtual void	render (std::string &result, int indent, bool at_root, std::string const &at_key, config_render_options options) const

shared_config	at_key (shared_origin origin, std::string const &key) const

shared_config	at_path (shared_origin origin, path raw_path) const

void	require_not_ignoring_fallbacks () const

virtual shared_value	with_fallbacks_ignored () const

shared_value	merged_with_the_unmergeable (std::vector< shared_value > stack, std::shared_ptr< const unmergeable > fallback) const

shared_value	merged_with_the_unmergeable (std::shared_ptr< const unmergeable > fallback) const

shared_value	merged_with_object (std::vector< shared_value > stack, shared_object fallback) const

virtual shared_value	merged_with_object (shared_object fallback) const

shared_value	merged_with_non_object (std::vector< shared_value > stack, shared_value fallback) const

shared_value	merged_with_non_object (shared_value fallback) const

virtual shared_value	construct_delayed_merge (shared_origin origin, std::vector< shared_value > stack) const

shared_value	to_fallback_value () const override
	Converts a config to its root object and a config_value to itself. More...

Static Protected Member Functions
static void	indent (std::string &result, int indent, config_render_options const &options)

static std::vector< shared_value >	replace_child_in_list (std::vector< shared_value > const &values, shared_value const &child, shared_value replacement)

static bool	has_descendant_in_list (std::vector< shared_value > const &values, shared_value const &descendant)

template<typename T >
static bool	equals (config_value const &other, std::function< bool(T const &)> checker)

Detailed Description

A config_concatenation represents a list of values to be concatenated (see the spec).

It only has to exist if at least one value is an unresolved substitution, otherwise we could go ahead and collapse the list into a single value.

Right now this is always a list of strings and ${} references, but in the future should support a list of config_list. We may also support concatenations of objects, but config_delayed_merge should be used for that since a concat of objects really will merge, not concatenate.

Definition at line 24 of file config_concatenation.hpp.

Member Enumeration Documentation

◆ type

enum hocon::config_value::type

stronginherited

The type of a configuration value (following the JSON type schema).

Definition at line 56 of file config_value.hpp.

Member Function Documentation

◆ at_key()

shared_config hocon::config_value::at_key ( std::string const & key ) const

inherited

Places the value inside a config at the given key.

◆ at_path()

shared_config hocon::config_value::at_path ( std::string const & path_expression ) const

inherited

Places the value inside a config at the given path.

◆ has_descendant()

bool hocon::config_concatenation::has_descendant ( shared_value const & descendant ) const

overridevirtual

Super-expensive full traversal to see if descendant is anywhere underneath this container.

Implements hocon::container.

◆ origin()

virtual shared_origin const& hocon::config_value::origin ( ) const

virtualinherited

The origin of the value (file, line number, etc.), for debugging and error messages.

Returns: where the value came from

◆ relativized()

shared_value hocon::config_concatenation::relativized ( std::string prefix ) const

overridevirtual

This is used when including one file in another; the included file is relativized to the path it's included into in the parent file.

The point is that if you include a file at foo.bar in the parent, and the included file as a substitution ${a.b.c}, the included substitution now needs to be ${foo.bar.a.b.c} because we resolve substitutions globally only after parsing everything.

Parameters

prefix

Returns: value relativized to the given path or the same value if nothing to do

Reimplemented from hocon::config_value.

◆ render() [1/2]

virtual std::string hocon::config_value::render ( ) const

virtualinherited

Renders the config value as a HOCON string.

This method is primarily intended for debugging, so it tries to add helpful comments and whitespace.

If the config value has not been resolved (see config#resolve), it's possible that it can't be rendered as valid HOCON. In that case the rendering should still be useful for debugging but you might not be able to parse it. If the value has been resolved, it will always be parseable.

This method is equivalent to

render(config_render_options())

.

Returns: the rendered value

◆ render() [2/2]

virtual std::string hocon::config_value::render ( config_render_options options ) const

virtualinherited

Renders the config value to a string, using the provided options.

If the config value has not been resolved (see config#resolve), it's possible that it can't be rendered as valid HOCON. In that case the rendering should still be useful for debugging but you might not be able to parse it. If the value has been resolved, it will always be parseable.

If the config value has been resolved and the options disable all HOCON-specific features (such as comments), the rendering will be valid JSON. If you enable HOCON-only features such as comments, the rendering will not be valid JSON.

Parameters

options the rendering options

Returns: the rendered value

◆ replace_child()

shared_value hocon::config_concatenation::replace_child	(	shared_value const &	child,
		shared_value	replacement
	)		const

overridevirtual

Replace a child of this value.

CAUTION if replacement is null, delete the child, which may also delete the parent, or make the parent into a non-container.

Implements hocon::container.

◆ to_fallback_value()

shared_value hocon::config_value::to_fallback_value ( ) const

overrideprotectedvirtualinherited

Converts a config to its root object and a config_value to itself.

Originally in the MergeableValue interface, squashing to ease C++ public API separation

Implements hocon::config_mergeable.

◆ value_type()

config_value::type hocon::config_concatenation::value_type ( ) const

overridevirtual

The type of the value; matches the JSON type schema.

Returns: value's type

Implements hocon::config_value.

◆ value_type_name()

char const* hocon::config_value::value_type_name ( ) const

inlineinherited

The printable name of the value type.

Returns: value's type's name

Definition at line 92 of file config_value.hpp.

◆ with_fallback()

std::shared_ptr<const config_mergeable> hocon::config_value::with_fallback ( std::shared_ptr< const config_mergeable > other ) const

overridevirtualinherited

Returns a new value computed by merging this value with another, with keys in this value "winning" over the other one.

This associative operation may be used to combine configurations from multiple sources (such as multiple configuration files).

The semantics of merging are described in the spec for HOCON. Merging typically occurs when either the same object is created twice in the same file, or two config files are both loaded. For example:

 foo = { a: 42 }
 foo = { b: 43 }

Here, the two objects are merged as if you had written:

 foo = { a: 42, b: 43 }

Only config_object and config instances do anything in this method (they need to merge the fallback keys into themselves). All other values just return the original value, since they automatically override any fallback. This means that objects do not merge "across" non-objects; if you write object.withFallback(nonObject).withFallback(otherObject), then otherObject will simply be ignored. This is an intentional part of how merging works, because non-objects such as strings and integers replace (rather than merging with) any prior value:

foo = { a: 42 }
foo = 10

Here, the number 10 "wins" and the value of foo would be simply 10. Again, for details see the spec.

Parameters

other an object whose keys should be used as fallbacks, if the keys are not present in this one

Returns: a new object (or the original one, if the fallback doesn't get used)

Implements hocon::config_mergeable.

◆ with_origin()

virtual shared_value hocon::config_value::with_origin ( shared_origin origin ) const

virtualinherited

Returns a.

config_value

based on this one, but with the given origin. This is useful when you are parsing a new format of file or setting comments for a single config_value.

Parameters

origin the origin set on the returned value

Returns: the new config_value with the given origin

The documentation for this class was generated from the following file:

internal/values/config_concatenation.hpp

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Static Protected Member Functions

Detailed Description

Member Enumeration Documentation

◆ type

Member Function Documentation

◆ at_key()

◆ at_path()

◆ has_descendant()

◆ origin()

◆ relativized()

◆ render() [1/2]

◆ render() [2/2]

◆ replace_child()

◆ to_fallback_value()

◆ value_type()

◆ value_type_name()

◆ with_fallback()

◆ with_origin()