TfTemplateString provides simple string substitutions based on named placeholders. More...

#include <templateString.h>

Public Types
typedef std::map< std::string, std::string >	Mapping

Public Member Functions
TF_API	TfTemplateString ()
	Constructs a new template string.

TF_API	TfTemplateString (const std::string &template_)
	Constructs a new template string.

const std::string &	GetTemplate () const
	Returns the template source string supplied to the constructor.

TF_API std::string	Substitute (const Mapping &) const
	Performs the template substitution, returning a new string.

TF_API std::string	SafeSubstitute (const Mapping &) const
	Like Substitute(), except that if placeholders are missing from the mapping, instead of raising a coding error, the original placeholder will appear in the resulting string intact.

TF_API Mapping	GetEmptyMapping () const
	Returns an empty mapping for the current template.

TF_API bool	IsValid () const
	Returns true if the current template is well formed.

TF_API std::vector< std::string >	GetParseErrors () const
	Returns any error messages generated during template parsing.

Detailed Description

TfTemplateString provides simple string substitutions based on named placeholders.

Instead of the ''-based substitutions used by printf, template strings use '$'-based substitutions, using the following rules:

"$$" is replaced with a single "$"
"$identifier" names a substitution placeholder matching a mapping key of "identifier". The first non-identifier character after the "$" character terminates the placeholder specification.
"${identifier}" is equivalent to "$identifier". It is required when valid identifier characters follow the placeholder but are not part of the placeholder, such as "${noun}ification".
An identifier is a sequence of characters "[A-Z][a-z][0-9]_".

TfTemplateString is immutable: once one is created it may not be modified. TfTemplateString is fast to copy, since it shares state internally between copies. TfTemplateString is thread-safe. It may be read freely by multiple threads concurrently.

Definition at line 46 of file templateString.h.

Member Typedef Documentation

◆ Mapping

typedef std::map<std::string, std::string> Mapping

Definition at line 48 of file templateString.h.

Constructor & Destructor Documentation

◆ TfTemplateString() [1/2]

TF_API TfTemplateString ( )

Constructs a new template string.

◆ TfTemplateString() [2/2]

TF_API TfTemplateString ( const std::string & template_ )

Constructs a new template string.

Member Function Documentation

◆ GetEmptyMapping()

TF_API Mapping GetEmptyMapping ( ) const

Returns an empty mapping for the current template.

This method first calls IsValid to ensure that the template is valid.

◆ GetParseErrors()

TF_API std::vector< std::string > GetParseErrors ( ) const

Returns any error messages generated during template parsing.

◆ GetTemplate()

const std::string & GetTemplate ( ) const

inline

Returns the template source string supplied to the constructor.

Definition at line 59 of file templateString.h.

◆ IsValid()

TF_API bool IsValid ( ) const

Returns true if the current template is well formed.

Empty templates are valid.

◆ SafeSubstitute()

TF_API std::string SafeSubstitute ( const Mapping & ) const

Like Substitute(), except that if placeholders are missing from the mapping, instead of raising a coding error, the original placeholder will appear in the resulting string intact.

◆ Substitute()

TF_API std::string Substitute ( const Mapping & ) const

Performs the template substitution, returning a new string.

The mapping contains keys which match the placeholders in the template. If a placeholder is found for which no mapping is present, a coding error is raised.

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

pxr/base/tf/templateString.h

Public Types

Public Member Functions