Function syn::parse_file [−][src]
pub fn parse_file(content: &str) -> Result<File>
Parse the content of a file of Rust code.
This is different from syn::parse_str::<File>(content)
in two ways:
- It discards a leading byte order mark
\u{FEFF}
if the file has one. - It preserves the shebang line of the file, such as
#!/usr/bin/env rustx
.
If present, either of these would be an error using from_str
.
This function is available only if Syn is built with the "parsing"
and
"full"
features.
Examples
use std::error::Error; use std::fs::File; use std::io::Read; fn run() -> Result<(), Box<Error>> { let mut file = File::open("path/to/code.rs")?; let mut content = String::new(); file.read_to_string(&mut content)?; let ast = syn::parse_file(&content)?; if let Some(shebang) = ast.shebang { println!("{}", shebang); } println!("{} items", ast.items.len()); Ok(()) }