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use nom::{
branch::alt,
combinator::map,
multi::separated_list0,
sequence::{preceded, terminated},
IResult,
};
use crate::common::FilePosition;
use crate::idl::common::Span;
use crate::idl::errors::ParseError;
use crate::idl::namespace::Namespace;
use super::{
common::{ws, ws1},
include::{parse_include, Include},
namespace::parse_namespace_part,
NamespacePart,
};
#[derive(Debug, PartialEq)]
pub struct Document {
pub includes: Vec<Include>,
pub ns: Namespace,
}
pub enum DocumentPart {
Include(Include),
NamespacePart(NamespacePart),
}
pub fn parse_document(input: &str) -> Result<Document, ParseError> {
let span = Span::new(input);
let result = parse_document_content(span);
match result {
Ok((span, parts)) if span.fragment() == &"" => {
let mut includes: Vec<Include> = Vec::new();
let mut ns_parts: Vec<NamespacePart> = Vec::new();
for part in parts {
match part {
DocumentPart::Include(part) => includes.push(part),
DocumentPart::NamespacePart(part) => ns_parts.push(part),
}
}
Ok(Document {
includes,
ns: Namespace {
name: String::default(),
position: FilePosition { line: 1, column: 1 },
parts: ns_parts,
},
})
}
Ok((garbage, _)) => Err(ParseError::TrailingGarbage(garbage)),
Err(error) => Err(ParseError::Nom(error)),
}
}
fn parse_document_part(input: Span) -> IResult<Span, DocumentPart> {
alt((
map(parse_include, DocumentPart::Include),
map(parse_namespace_part, DocumentPart::NamespacePart),
))(input)
}
pub fn parse_document_content(input: Span) -> IResult<Span, Vec<DocumentPart>> {
preceded(
ws,
terminated(separated_list0(ws1, parse_document_part), ws),
)(input)
}
#[test]
fn test_parse_document() {
use crate::idl::field_option::FieldOption;
use crate::idl::method::Method;
use crate::idl::namespace::{Namespace, NamespacePart};
use crate::idl::r#struct::{Field, Struct};
use crate::idl::r#type::{Type, TypeRef};
use crate::idl::service::Service;
use crate::idl::value::Value;
let content = "
include common.ww;
struct Person {
name: String (length=1..50),
age: Integer,
}
struct Group {
name: String,
}
service Pinger {
ping: None -> None,
get_version: None -> String,
}
";
assert_eq!(
parse_document(content),
Ok(Document {
includes: vec![Include {
filename: "common.ww".to_string(),
position: FilePosition {
line: 2,
column: 17
},
}],
ns: Namespace {
name: "".to_string(),
position: FilePosition { line: 1, column: 1 },
parts: vec![
NamespacePart::Struct(Struct {
name: "Person".to_string(),
position: FilePosition { line: 3, column: 9 },
generics: vec![],
fields: vec![
Field {
name: "name".to_string(),
position: FilePosition {
line: 4,
column: 13
},
type_: Type::Ref(TypeRef {
abs: false,
ns: vec![],
name: "String".to_string(),
generics: vec![]
}),
optional: false,
options: vec![FieldOption {
name: "length".to_string(),
value: Value::Range(Some(1), Some(50))
}],
},
Field {
name: "age".to_string(),
position: FilePosition {
line: 5,
column: 13
},
type_: Type::Ref(TypeRef {
abs: false,
name: "Integer".to_string(),
ns: vec![],
generics: vec![],
}),
optional: false,
options: vec![],
},
],
}),
NamespacePart::Struct(Struct {
name: "Group".to_string(),
position: FilePosition { line: 7, column: 9 },
generics: vec![],
fields: vec![Field {
name: "name".to_string(),
position: FilePosition {
line: 8,
column: 13
},
type_: Type::Ref(TypeRef {
abs: false,
name: "String".to_string(),
ns: vec![],
generics: vec![]
}),
optional: false,
options: vec![],
}],
}),
NamespacePart::Service(Service {
name: "Pinger".to_string(),
position: FilePosition {
line: 10,
column: 9
},
methods: vec![
Method {
name: "ping".to_string(),
input: None,
output: None,
},
Method {
name: "get_version".to_string(),
input: None,
output: Some(Type::Ref(TypeRef {
abs: false,
ns: vec![],
name: "String".to_string(),
generics: vec![]
})),
},
],
}),
],
},
})
)
}