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WIP: extract the error trait bound to new trait.

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This commit is contained in:
刘瀚骋 2021-10-13 18:04:15 +08:00
parent 5de5dd80a3
commit cd359cd96e
1 changed files with 21 additions and 16 deletions
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37
milli/src/search/facet/filter_parser.rs
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@ -9,7 +9,6 @@ use nom::{
bytes::complete::{tag, take_while1}, bytes::complete::{tag, take_while1},
character::complete::{char, multispace0}, character::complete::{char, multispace0},
combinator::map, combinator::map,
error::ParseError,
error::VerboseError, error::VerboseError,
error::{ContextError, ErrorKind}, error::{ContextError, ErrorKind},
multi::many0, multi::many0,
@ -50,6 +49,12 @@ impl Operator {
} }
} }
pub trait FilterParserError<'a>:
nom::error::ParseError<&'a str> + ContextError<&'a str> + std::fmt::Debug
{
}
impl<'a> FilterParserError<'a> for VerboseError<&'a str> {}
pub struct ParseContext<'a> { pub struct ParseContext<'a> {
pub fields_ids_map: &'a FieldsIdsMap, pub fields_ids_map: &'a FieldsIdsMap,
pub filterable_fields: &'a HashSet<String>, pub filterable_fields: &'a HashSet<String>,
@ -58,7 +63,7 @@ pub struct ParseContext<'a> {
impl<'a> ParseContext<'a> { impl<'a> ParseContext<'a> {
fn parse_or<E>(&'a self, input: &'a str) -> IResult<&'a str, FilterCondition, E> fn parse_or<E>(&'a self, input: &'a str) -> IResult<&'a str, FilterCondition, E>
where where
E: ParseError<&'a str> + ContextError<&'a str> + Debug, E: FilterParserError<'a>,
{ {
let (input, lhs) = self.parse_and(input)?; let (input, lhs) = self.parse_and(input)?;
let (input, ors) = many0(preceded(self.ws(tag("OR")), |c| Self::parse_or(self, c)))(input)?; let (input, ors) = many0(preceded(self.ws(tag("OR")), |c| Self::parse_or(self, c)))(input)?;
@ -71,7 +76,7 @@ impl<'a> ParseContext<'a> {
fn parse_and<E>(&'a self, input: &'a str) -> IResult<&'a str, FilterCondition, E> fn parse_and<E>(&'a self, input: &'a str) -> IResult<&'a str, FilterCondition, E>
where where
E: ParseError<&'a str> + ContextError<&'a str> + Debug, E: FilterParserError<'a>,
{ {
let (input, lhs) = self.parse_not(input)?; let (input, lhs) = self.parse_not(input)?;
let (input, ors) = let (input, ors) =
@ -84,7 +89,7 @@ impl<'a> ParseContext<'a> {
fn parse_not<E>(&'a self, input: &'a str) -> IResult<&'a str, FilterCondition, E> fn parse_not<E>(&'a self, input: &'a str) -> IResult<&'a str, FilterCondition, E>
where where
E: ParseError<&'a str> + ContextError<&'a str> + Debug, E: FilterParserError<'a>,
{ {
alt(( alt((
map( map(
@ -100,14 +105,14 @@ impl<'a> ParseContext<'a> {
fn ws<F, O, E>(&'a self, inner: F) -> impl FnMut(&'a str) -> IResult<&'a str, O, E> fn ws<F, O, E>(&'a self, inner: F) -> impl FnMut(&'a str) -> IResult<&'a str, O, E>
where where
F: Fn(&'a str) -> IResult<&'a str, O, E>, F: Fn(&'a str) -> IResult<&'a str, O, E>,
E: ParseError<&'a str> + ContextError<&'a str> + Debug, E: FilterParserError<'a>,
{ {
delimited(multispace0, inner, multispace0) delimited(multispace0, inner, multispace0)
} }
fn parse_simple_condition<E>(&'a self, input: &'a str) -> IResult<&'a str, FilterCondition, E> fn parse_simple_condition<E>(&'a self, input: &'a str) -> IResult<&'a str, FilterCondition, E>
where where
E: ParseError<&'a str> + ContextError<&'a str> + std::fmt::Debug, E: FilterParserError<'a>,
{ {
let operator = alt((tag("<="), tag(">="), tag(">"), tag("="), tag("<"), tag("!="))); let operator = alt((tag("<="), tag(">="), tag(">"), tag("="), tag("<"), tag("!=")));
let k = tuple((self.ws(|c| self.parse_key(c)), operator, self.ws(|c| self.parse_key(c))))( let k = tuple((self.ws(|c| self.parse_key(c)), operator, self.ws(|c| self.parse_key(c))))(
@ -135,7 +140,7 @@ impl<'a> ParseContext<'a> {
fn parse_numeric<E, T>(&'a self, input: &'a str) -> StdResult<T, nom::Err<E>> fn parse_numeric<E, T>(&'a self, input: &'a str) -> StdResult<T, nom::Err<E>>
where where
E: ParseError<&'a str> + ContextError<&'a str> + Debug, E: FilterParserError<'a>,
T: std::str::FromStr, T: std::str::FromStr,
{ {
match input.parse::<T>() { match input.parse::<T>() {
@ -156,7 +161,7 @@ impl<'a> ParseContext<'a> {
value: &'a str, value: &'a str,
) -> IResult<&'a str, FilterCondition, E> ) -> IResult<&'a str, FilterCondition, E>
where where
E: ParseError<&'a str> + ContextError<&'a str> + Debug, E: FilterParserError<'a>,
{ {
let numeric: f64 = self.parse_numeric(value)?; let numeric: f64 = self.parse_numeric(value)?;
let k = match input { let k = match input {
@ -171,7 +176,7 @@ impl<'a> ParseContext<'a> {
fn parse_fid<E>(&'a self, input: &'a str, key: &'a str) -> StdResult<FieldId, nom::Err<E>> fn parse_fid<E>(&'a self, input: &'a str, key: &'a str) -> StdResult<FieldId, nom::Err<E>>
where where
E: ParseError<&'a str> + ContextError<&'a str> + Debug, E: FilterParserError<'a>,
{ {
let error = match input.chars().nth(0) { let error = match input.chars().nth(0) {
Some(ch) => Err(nom::Err::Failure(E::from_char(input, ch))), Some(ch) => Err(nom::Err::Failure(E::from_char(input, ch))),
@ -188,7 +193,7 @@ impl<'a> ParseContext<'a> {
fn parse_range_condition<E>(&'a self, input: &'a str) -> IResult<&'a str, FilterCondition, E> fn parse_range_condition<E>(&'a self, input: &'a str) -> IResult<&'a str, FilterCondition, E>
where where
E: ParseError<&'a str> + ContextError<&'a str> + Debug, E: FilterParserError<'a>,
{ {
let (input, (key, from, _, to)) = tuple(( let (input, (key, from, _, to)) = tuple((
self.ws(|c| self.parse_key(c)), self.ws(|c| self.parse_key(c)),
@ -207,7 +212,7 @@ impl<'a> ParseContext<'a> {
fn parse_geo_radius<E>(&'a self, input: &'a str) -> IResult<&'a str, FilterCondition, E> fn parse_geo_radius<E>(&'a self, input: &'a str) -> IResult<&'a str, FilterCondition, E>
where where
E: ParseError<&'a str> + ContextError<&'a str> + Debug, E: FilterParserError<'a>,
{ {
let err_msg_args_incomplete:&'static str = "_geoRadius. The `_geoRadius` filter expect three arguments: `_geoRadius(latitude, longitude, radius)`"; let err_msg_args_incomplete:&'static str = "_geoRadius. The `_geoRadius` filter expect three arguments: `_geoRadius(latitude, longitude, radius)`";
let err_msg_args_invalid: &'static str = let err_msg_args_invalid: &'static str =
@ -258,7 +263,7 @@ impl<'a> ParseContext<'a> {
fn parse_condition<E>(&'a self, input: &'a str) -> IResult<&'a str, FilterCondition, E> fn parse_condition<E>(&'a self, input: &'a str) -> IResult<&'a str, FilterCondition, E>
where where
E: ParseError<&'a str> + ContextError<&'a str> + Debug, E: FilterParserError<'a>,
{ {
let l1 = |c| self.parse_simple_condition(c); let l1 = |c| self.parse_simple_condition(c);
let l2 = |c| self.parse_range_condition(c); let l2 = |c| self.parse_range_condition(c);
@ -269,7 +274,7 @@ impl<'a> ParseContext<'a> {
fn parse_condition_expression<E>(&'a self, input: &'a str) -> IResult<&str, FilterCondition, E> fn parse_condition_expression<E>(&'a self, input: &'a str) -> IResult<&str, FilterCondition, E>
where where
E: ParseError<&'a str> + ContextError<&'a str> + Debug, E: FilterParserError<'a>,
{ {
alt(( alt((
delimited(self.ws(char('(')), |c| Self::parse_expression(self, c), self.ws(char(')'))), delimited(self.ws(char('(')), |c| Self::parse_expression(self, c), self.ws(char(')'))),
@ -279,7 +284,7 @@ impl<'a> ParseContext<'a> {
fn parse_key<E>(&'a self, input: &'a str) -> IResult<&'a str, &'a str, E> fn parse_key<E>(&'a self, input: &'a str) -> IResult<&'a str, &'a str, E>
where where
E: ParseError<&'a str> + ContextError<&'a str>, E: FilterParserError<'a>,
{ {
let key = |input| take_while1(Self::is_key_component)(input); let key = |input| take_while1(Self::is_key_component)(input);
alt((key, delimited(char('"'), key, char('"'))))(input) alt((key, delimited(char('"'), key, char('"'))))(input)
@ -287,7 +292,7 @@ impl<'a> ParseContext<'a> {
fn parse_value<E>(&'a self, input: &'a str) -> IResult<&'a str, &'a str, E> fn parse_value<E>(&'a self, input: &'a str) -> IResult<&'a str, &'a str, E>
where where
E: ParseError<&'a str> + ContextError<&'a str> + Debug, E: FilterParserError<'a>,
{ {
let key = |input| take_while1(Self::is_key_component)(input); let key = |input| take_while1(Self::is_key_component)(input);
alt((key, delimited(char('"'), key, char('"'))))(input) alt((key, delimited(char('"'), key, char('"'))))(input)
@ -299,7 +304,7 @@ impl<'a> ParseContext<'a> {
pub fn parse_expression<E>(&'a self, input: &'a str) -> IResult<&'a str, FilterCondition, E> pub fn parse_expression<E>(&'a self, input: &'a str) -> IResult<&'a str, FilterCondition, E>
where where
E: ParseError<&'a str> + ContextError<&'a str> + Debug, E: FilterParserError<'a>,
{ {
let a = self.parse_or(input); let a = self.parse_or(input);
a a