Crate vmf_parser_nom
source ·Expand description
A parser for the Valve map format. Also a provided convience macro for iterating over subblocks using the traversal crate.
Vmf Format
See parse()
for the implementation.
Read more about the vmf format on Valve Developer Community
// This is a comment.
ClassName_1
{
"Property_1" "Value_1"
"Property_2" "Value_2"
ClassName_2
{
"Property_1" "Value_1"
}
ClassName_3
{
}
}
Example
use vmf_parser_nom::ast::{Block};
use vmf_parser_nom::parse;
use vmf_parser_nom::error::{VerboseError, SimpleError, ErrorKind};
let input = "ClassName_1
{
\t\"Property_1\" \"Value_1\"
\t\"Property_2\" \"Value_2\"
\tClassName_2
\t{
\t\t\"Property_1\" \"Value_1\"
\t}
\tClassName_3
\t{
\t}
}";
// parse the input to a vmf, borrowing from input
let vmf = parse::<&str, ()>(input).unwrap();
println!("vmf:\n{vmf}");
assert_eq!(input, vmf.to_string());
// handy method to generate new ids so you don't have to deal with them
// same as display with alternate flag
assert_eq!(vmf.to_string_new_ids(), format!("{vmf:#}"));
// parse to owned strings instead
let vmf_owned = parse::<String, ()>(input).unwrap();
// All valid error types
let invalid_input = "block{\"property_with_no_value\"}";
let err_verbose = parse::<&str, VerboseError<_>>(invalid_input).unwrap_err();
let err_simple = parse::<&str, SimpleError<_>>(invalid_input).unwrap_err();
let err_tuple = parse::<&str, (_, ErrorKind)>(invalid_input).unwrap_err();
let err_unit = parse::<&str, ()>(invalid_input).unwrap_err();
println!("verbose: {err_verbose:?}");
println!("simple: {err_simple:?}");
println!("tuple: {err_tuple:?}");
println!("unit: {err_unit:?}");
// implements Deref
let block: &Block<String> = &vmf_owned;
assert_eq!(vmf_owned.inner, *block);
// inner value is simply a block with no properties
assert_eq!(vmf_owned.inner.name, "root");
assert_eq!(vmf_owned.inner.props, vec![]);
assert!(!vmf_owned.inner.blocks.is_empty());
Modules
- Abstract syntax tree representing a vmf file.
- Re-exports of
nom
errors for conveinience. - Parse Vmf from a str
Macros
Functions
- Parse a
&str
into aVmf
, completely ignoring whitespace. You can specify the output string type to be any type that implementsFrom<&str>
.