64 lines
1.9 KiB
Rust
64 lines
1.9 KiB
Rust
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use crate::{grammar::value, syntax_error::SyntaxError, syntax_kind::SyntaxKind};
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use super::{CompletedMarker, Parser, BASIC_VALUE_TOKENS};
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pub(super) fn object(p: &mut Parser) -> Option<CompletedMarker> {
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let obj_start = p.start("object");
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if !p.eat(SyntaxKind::BRACE_OPEN) {
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obj_start.abandon(p);
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return None;
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}
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member(p);
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while p.at(SyntaxKind::COMMA) {
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// not always an error, later configurable
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let potential_trailing_comma = p.start("potential_trailing_comma");
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p.eat(SyntaxKind::COMMA);
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if member(p).is_none() {
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potential_trailing_comma.complete(p, SyntaxKind::TRAILING_COMMA);
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} else {
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potential_trailing_comma.abandon(p);
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}
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}
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Some(if !p.eat(SyntaxKind::BRACE_CLOSE) {
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obj_start.error(p, SyntaxError::UnclosedObject)
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} else {
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obj_start.complete(p, SyntaxKind::OBJECT)
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})
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}
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fn member(p: &mut Parser) -> Option<CompletedMarker> {
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let member_start = p.start("member");
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if p.at(SyntaxKind::BRACE_CLOSE) {
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member_start.abandon(p);
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return None;
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} else if p.at(SyntaxKind::STRING) {
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let member_name_start = p.start("member_name");
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p.eat(SyntaxKind::STRING);
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member_name_start.complete(p, SyntaxKind::MEMBER_NAME);
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} else {
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return todo!("handle other tokens: {:?}", p.current());
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}
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if !p.eat(SyntaxKind::COLON) {
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todo!("handle wrong tokens")
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}
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let member_value_start = p.start("member_value_start");
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if value(p) {
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member_value_start.complete(p, SyntaxKind::MEMBER_VALUE);
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Some(member_start.complete(p, SyntaxKind::MEMBER))
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} else {
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member_value_start.abandon(p);
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let e = member_start.error(p, SyntaxError::MemberMissingValue);
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Some(
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e.precede(p, "member but failed already")
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.complete(p, SyntaxKind::MEMBER),
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)
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}
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}
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