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revsets: use consistent "_op" suffix for operator rules in the grammar

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This is especially important now that we leak the rule names into the
`SyntaxError` message. For example, the error message when doing `jj
diff -r :` will now mention "expected parents_op, ancestors_op, or
primary". It seems much clearer with the "_op" suffixes there. Longer
term, we should think more about how we can best surface syntax errors
from the library crate.
This commit is contained in:
Martin von Zweigbergk 2021-04-21 13:42:37 -07:00
parent a4ef42962c
commit 618abf4379
2 changed files with 14 additions and 14 deletions
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18
lib/src/revset.pest
View file

@ -16,14 +16,14 @@ symbol = @{ (ASCII_ALPHANUMERIC | "@" | "/" | ".")+ }
literal_string = { "\"" ~ (!"\"" ~ ANY)+ ~ "\"" }
whitespace = _{ " " }
parents = { ":" }
ancestors = { "*:" }
prefix_operator = _{ parents | ancestors }
parents_op = { ":" }
ancestors_op = { "*:" }
prefix_op = _{ parents_op | ancestors_op }
union = { "|" }
intersection = { "&" }
difference = { "-" }
infix_operator = _{ union| intersection | difference }
union_op = { "|" }
intersection_op = { "&" }
difference_op = { "-" }
infix_op = _{ union_op | intersection_op | difference_op }
function_name = @{ (ASCII_ALPHANUMERIC | "_")+ }
// The grammar accepts a string literal or an expression for function
@ -48,10 +48,10 @@ primary = {
| symbol
}
prefix_expression = { prefix_operator* ~ primary }
prefix_expression = { prefix_op* ~ primary }
infix_expression = {
whitespace* ~ prefix_expression ~ whitespace* ~ (infix_operator ~ whitespace* ~ prefix_expression ~ whitespace*)*
whitespace* ~ prefix_expression ~ whitespace* ~ (infix_op ~ whitespace* ~ prefix_expression ~ whitespace*)*
}
expression = {

10
lib/src/revset.rs
View file

@ -136,14 +136,14 @@ fn parse_infix_expression_rule(
while let Some(operator) = pairs.next() {
let expression2 = parse_prefix_expression_rule(pairs.next().unwrap().into_inner())?;
match operator.as_rule() {
Rule::union => {
Rule::union_op => {
expression1 = RevsetExpression::Union(Box::new(expression1), Box::new(expression2))
}
Rule::intersection => {
Rule::intersection_op => {
expression1 =
RevsetExpression::Intersection(Box::new(expression1), Box::new(expression2))
}
Rule::difference => {
Rule::difference_op => {
expression1 =
RevsetExpression::Difference(Box::new(expression1), Box::new(expression2))
}
@ -164,10 +164,10 @@ fn parse_prefix_expression_rule(
let first = pairs.next().unwrap();
match first.as_rule() {
Rule::primary => parse_primary_rule(first.into_inner()),
Rule::parents => Ok(RevsetExpression::Parents(Box::new(
Rule::parents_op => Ok(RevsetExpression::Parents(Box::new(
parse_prefix_expression_rule(pairs)?,
))),
Rule::ancestors => Ok(RevsetExpression::Ancestors(Box::new(
Rule::ancestors_op => Ok(RevsetExpression::Ancestors(Box::new(
parse_prefix_expression_rule(pairs)?,
))),
_ => {