Reading FTD Files
A FTD file can be parsed from Rust using the
ftd crate:let doc = ftd::p2::Document::from("some/id", source, lib)?; let msg: String = doc.get("some/id#x)?;
To learn about
lib parameter, checkout the library documentation. When calling .get() the type of variable in Rust must have compatible serde::Deserialize implementation. For builtin-types you will see what types they can be deserialized into. records can deserialized into corresponding Rust structs, and or-type into Rust enum.
A Note On IDWhen parsing ftd file, a “library” has to be provided because an ftd file can refer to another ftd files using the import feature. So the parsed document contains all data about all the ftd files referenced, directly or indirectly from the original file. The original document’s name must be provided when parsing, in our example, it is "some/id", and similarly when getting a variable out parsed state, we have to use <doc-id>#<variable-name> format to generate “full id” of any variable.
When parsing
ftd file, a “library” has to be provided because an ftd file can refer to another ftd files using the import feature. So the parsed document contains all data about all the ftd files referenced, directly or indirectly from the original file. The original document’s name must be provided when parsing, in our example, it is "some/id", and similarly when getting a variable out parsed state, we have to use <doc-id>#<variable-name> format to generate “full id” of any variable.
