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Allow custom syntax inside binary operator expressions.

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This commit is contained in:
Stephen Chung
2021-12-16 16:06:44 +08:00
parent 93e3c4c10a
commit 224aa0ea68
6 changed files with 71 additions and 37 deletions
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38
src/parser.rs
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@@ -1550,9 +1550,26 @@ fn parse_unary(
settings.ensure_level_within_max_limit(state.max_expr_depth)?;
let (token, token_pos) = input.peek().expect(NEVER_ENDS);
let token_pos = *token_pos;
let mut settings = settings;
settings.pos = *token_pos;
settings.pos = token_pos;
// Check if it is a custom syntax.
if !state.engine.custom_syntax.is_empty() {
match token {
Token::Custom(key) | Token::Reserved(key) | Token::Identifier(key) => {
if let Some((key, syntax)) = state.engine.custom_syntax.get_key_value(key.as_ref())
{
input.next().expect(NEVER_ENDS);
return parse_custom_syntax(
input, state, lib, settings, key, syntax, token_pos,
);
}
}
_ => (),
}
}
match token {
// -expr
@@ -2251,25 +2268,6 @@ fn parse_expr(
let mut settings = settings;
settings.pos = input.peek().expect(NEVER_ENDS).1;
// Check if it is a custom syntax.
if !state.engine.custom_syntax.is_empty() {
let (token, pos) = input.peek().expect(NEVER_ENDS);
let token_pos = *pos;
match token {
Token::Custom(key) | Token::Reserved(key) | Token::Identifier(key) => {
if let Some((key, syntax)) = state.engine.custom_syntax.get_key_value(key.as_ref())
{
input.next().expect(NEVER_ENDS);
return parse_custom_syntax(
input, state, lib, settings, key, syntax, token_pos,
);
}
}
_ => (),
}
}
// Parse expression normally.
let lhs = parse_unary(input, state, lib, settings.level_up())?;
parse_binary_op(