78 lines
2 KiB
Rust
78 lines
2 KiB
Rust
use array::array;
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use enumset::{enum_set, EnumSet};
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use pawarser::parser::ParserBuilder;
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use crate::{
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syntax_error::SyntaxError,
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syntax_kind::{lex, SyntaxKind},
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};
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use self::object::object;
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mod array;
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mod object;
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pub(crate) type Parser<'src> = pawarser::Parser<'src, SyntaxKind, SyntaxError>;
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pub(crate) type CompletedMarker = pawarser::CompletedMarker<SyntaxKind, SyntaxError>;
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const BASIC_VALUE_TOKENS: EnumSet<SyntaxKind> =
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enum_set!(SyntaxKind::BOOL | SyntaxKind::NULL | SyntaxKind::NUMBER | SyntaxKind::STRING);
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pub fn value(p: &mut Parser) -> bool {
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if BASIC_VALUE_TOKENS.contains(p.current()) {
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p.do_bump();
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return true;
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} else {
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object(p).or_else(|| array(p)).is_some()
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}
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}
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#[cfg(test)]
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mod tests {
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use super::{
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test_utils::{check_parser, gen_checks},
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value,
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};
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#[test]
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fn value_lit() {
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gen_checks! {value;
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r#""helo world""# => r#"ROOT { STRING "\"helo world\""; }"#,
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"42" => r#"ROOT { NUMBER "42"; }"#,
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"null" => r#"ROOT { NULL "null"; }"#,
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"true" => r#"ROOT { BOOL "true"; }"#,
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"false" => r#"ROOT { BOOL "false"; }"#
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};
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}
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}
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#[cfg(test)]
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mod test_utils {
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use pawarser::parser::ParserBuilder;
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use crate::syntax_kind::{lex, SyntaxKind};
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use super::Parser;
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macro_rules! gen_checks {
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($fn_to_test:ident; $($in:literal => $out:literal),+) => {
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$(crate::grammar::test_utils::check_parser($in, |p| { $fn_to_test(p); }, $out);)+
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}
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}
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pub(super) use gen_checks;
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pub(super) fn check_parser(input: &str, parser_fn: fn(&mut Parser), expected_output: &str) {
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let toks = lex(input);
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let mut p: Parser = ParserBuilder::new(toks)
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.add_meaningless(SyntaxKind::WHITESPACE)
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.add_meaningless(SyntaxKind::NEWLINE)
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.build();
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parser_fn(&mut p);
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let out = p.finish();
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assert_eq!(format!("{out:?}").trim_end(), expected_output);
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}
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}
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