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#[allow(unused_variables, dead_code)]
mod grammar;
mod lexer;
pub use lexer::{Lexer, LexicalError, Location, Token, TokenType};
#[derive(Clone, Debug)]
pub enum Error {
InternalError(String),
}
#[derive(Clone, Debug, Eq, PartialEq)]
pub enum Statement {
Assignment(Atom, Data),
Block(Block),
AtomData(Atom, Data),
AtomDictionary(Atom, Dictionary),
Atom(Atom),
DataData(Data, Data),
DataDictionary(Data, Dictionary),
}
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct Atom {
atom: String,
}
impl Atom {
pub fn identifier(&self) -> &str {
&self.atom
}
}
impl TryFrom<Token> for Atom {
type Error = Error;
fn try_from(token: Token) -> Result<Self, Self::Error> {
match token {
Token::Atom(s) => Ok(Atom { atom: s }),
_ => Err(Error::InternalError(
"Token cannot be converted to Atom".to_string(),
)),
}
}
}
impl TryFrom<Token> for String {
type Error = Error;
fn try_from(token: Token) -> Result<Self, Self::Error> {
match token {
Token::SingleQuotedString(s) => Ok(s),
Token::TripleQuotedString(s) => Ok(s),
_ => Err(Error::InternalError(
"Token cannot be converted to Atom".to_string(),
)),
}
}
}
#[derive(Clone, Debug)]
pub enum Data {
Variable(String),
SingleString(String),
TripleString(String),
F64(f64),
Dictionary(Dictionary),
}
impl Eq for Data {}
impl PartialEq for Data {
fn eq(&self, other: &Self) -> bool {
match (self, other) {
(Data::Variable(a), Data::Variable(b)) => a == b,
(Data::SingleString(a), Data::SingleString(b)) => a == b,
(Data::TripleString(a), Data::TripleString(b)) => a == b,
(Data::F64(a), Data::F64(b)) => a.total_cmp(b).is_eq(),
(Data::Dictionary(a), Data::Dictionary(b)) => a == b,
_ => false,
}
}
}
impl TryFrom<Token> for Data {
type Error = Error;
fn try_from(token: Token) -> Result<Self, Self::Error> {
match token {
Token::SingleQuotedString(s) => Ok(Data::SingleString(s)),
Token::TripleQuotedString(s) => Ok(Data::TripleString(s)),
Token::F64(f) => Ok(Data::F64(f)),
_ => Err(Error::InternalError(
"Token cannot be converted to Data".to_string(),
)),
}
}
}
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct Dictionary {
pub items: Vec<Statement>,
}
impl From<Dictionary> for Data {
fn from(dictionary: Dictionary) -> Self {
Data::Dictionary(dictionary)
}
}
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct Block {
pub r#type: Atom,
pub label: Option<String>,
pub dict: Dictionary,
}
pub fn parse(
input: &str,
) -> Result<Vec<Statement>, lalrpop_util::ParseError<Location, Token, LexicalError>> {
let lexer = Lexer::new(input);
grammar::StatementsParser::new().parse(lexer)
}
/////////////////////////////////////////////// tests //////////////////////////////////////////////
#[cfg(test)]
mod tests {
use crate::Statement;
use super::*;
#[test]
fn end_to_end() {
let input = r#"workload "foo" {
workload "subfoo1" {
query: 0.95,
write: 0.05,
}
workload "subfoo2" {
query: 0.5,
write: 0.5,
}
"subfoo1": 0.1,
"subfoo2": 0.9,
}
composition "bar" {
0.1: {
query: 0.95,
write: 0.05,
}
0.9: {
query: 0.5,
write: 0.5,
}
}
"#;
let expected: Vec<Statement> = vec![
Statement::Block(Block {
r#type: Atom {
atom: "workload".to_string(),
},
label: Some("foo".to_string()),
dict: Dictionary {
items: vec![
Statement::Block(Block {
r#type: Atom {
atom: "workload".to_string(),
},
label: Some("subfoo1".to_string()),
dict: Dictionary {
items: vec![
Statement::AtomData(
Atom {
atom: "query".to_string(),
},
Data::F64(0.95),
),
Statement::AtomData(
Atom {
atom: "write".to_string(),
},
Data::F64(0.05),
),
],
},
}),
Statement::Block(Block {
r#type: Atom {
atom: "workload".to_string(),
},
label: Some("subfoo2".to_string()),
dict: Dictionary {
items: vec![
Statement::AtomData(
Atom {
atom: "query".to_string(),
},
Data::F64(0.5),
),
Statement::AtomData(
Atom {
atom: "write".to_string(),
},
Data::F64(0.5),
),
],
},
}),
Statement::DataData(
Data::SingleString("subfoo1".to_string()),
Data::F64(0.1),
),
Statement::DataData(
Data::SingleString("subfoo2".to_string()),
Data::F64(0.9),
),
],
},
}),
Statement::Block(Block {
r#type: Atom {
atom: "composition".to_string(),
},
label: Some("bar".to_string()),
dict: Dictionary {
items: vec![
Statement::DataDictionary(
Data::F64(0.1),
Dictionary {
items: vec![
Statement::AtomData(
Atom {
atom: "query".to_string(),
},
Data::F64(0.95),
),
Statement::AtomData(
Atom {
atom: "write".to_string(),
},
Data::F64(0.05),
),
],
},
),
Statement::DataDictionary(
Data::F64(0.9),
Dictionary {
items: vec![
Statement::AtomData(
Atom {
atom: "query".to_string(),
},
Data::F64(0.5),
),
Statement::AtomData(
Atom {
atom: "write".to_string(),
},
Data::F64(0.5),
),
],
},
),
],
},
}),
];
let returned: Vec<Statement> = crate::parse(input).unwrap();
println!("{:#?}", returned);
assert_eq!(expected, returned);
}
}