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mod parser;
pub mod tree;
pub mod types;
use parser::{parse, tokenize};
use std::fs;
use tree::Tree;
use types::{ParseError, ParseResult};
pub fn parse_json(text: &str) -> ParseResult<Tree> {
tokenize::tokenize(&text)
.map(|tokens| tokens)
.and_then(|tokens| parse::parse_json(&tokens[..]))
}
pub fn parse_json_file(file_path: &str) -> ParseResult<Tree> {
match fs::read_to_string(file_path) {
Ok(text) => parse_json(&text),
Err(_) => Err(ParseError::FileNotFound),
}
}
#[cfg(test)]
mod tests {
use super::tree::{EntryType, PathType};
#[test]
fn test_parse() {
let json = "{ \"a\": {}, \"b\": { \"c\": [true, { \"e\": 42 } ] } }";
match super::parse_json(json) {
Ok(tree) => {
let res = tree.value_at(&[PathType::Object("a")]);
let entry = res.get(0).unwrap();
match (*(*entry)).entry_type {
EntryType::JSONObject(_) => println!("Correct entry"),
_ => panic!("Should be object"),
}
let res = tree.value_at(&[
PathType::Object("b"),
PathType::Object("c"),
PathType::Array(1),
PathType::Object("e"),
]);
let entry = res.get(0).unwrap();
match (*(*entry)).entry_type {
EntryType::Int(val) => assert_eq!(42, val),
_ => panic!("Should be number"),
}
let res = tree.value_at(&[
PathType::Wildcard,
PathType::Object("c"),
PathType::Array(0),
]);
let entry = res.get(0).unwrap();
match (*(*entry)).entry_type {
EntryType::Bool(val) => assert_eq!(true, val),
_ => panic!("Should be bool"),
}
let res = tree.value_at(&[
PathType::RecursiveWildcard,
PathType::Array(1),
PathType::Object("e"),
]);
let entry = res.get(0).unwrap();
match (*(*entry)).entry_type {
EntryType::Int(val) => assert_eq!(42, val),
_ => panic!("Should be number"),
}
let res = tree.value_at(&[
PathType::Wildcard,
PathType::Object("c"),
PathType::Array(1),
PathType::Object("e"),
]);
let entry = res.get(0).unwrap();
match (*(*entry)).entry_type {
EntryType::Int(val) => assert_eq!(42, val),
_ => panic!("Should be number"),
}
}
Err(_) => panic!("Could not parse json."),
}
}
}