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edn: Allow comments.

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EDN supports only one type of comment: initiated by ; and lasting
until the end of the current line or the end of the input stream.
This commit is contained in:
Nick Alexander 2017-01-17 11:25:31 -08:00 committed by Nick Alexander
parent 71a30fe69f
commit 247035cc9b
2 changed files with 12 additions and 2 deletions
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4
edn/src/edn.rustpeg
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@ -25,7 +25,6 @@ use types::Value;
// to trace where the parser is failing
// TODO: Support tagged elements
// TODO: Support comments
// TODO: Support discard
#[export]
@ -137,5 +136,6 @@ value -> Value
list / vector / map / set
whitespace = (" " / "\r" / "\n" / "\t")
comment = ";" [^\r\n]* ("\r" / "\n")?
__ = whitespace*
__ = (whitespace / comment)*

10
edn/tests/tests.rs
View file

@ -799,6 +799,16 @@ fn test_query_find_title() {
assert_eq!(value(test).unwrap(), reply);
}
#[test]
fn test_comments() {
let result = Ok(Value::Integer(0));
assert_eq!(value("0;"), result);
assert_eq!(value("0;x"), result);
assert_eq!(value("0;\n"), result);
assert_eq!(value("0;x\n"), result);
assert_eq!(value(";\n0"), result);
assert_eq!(value(";\r0"), result);
}
/*
// Handy templates for creating test cases follow: