Implement new rules for bare key names
* Key names are restricted to [a-zA-Z0-9_-] * Equal signs must be on the same line (as must the next value) as the key * Quoted keys are allowed and are parsed as basic strings. Closes #48
This commit is contained in:
Alex Crichton
parent
bc825a5fb5
commit
0285af245a
112
src/parser.rs
112
src/parser.rs
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@ -212,50 +212,55 @@ impl<'a> Parser<'a> {
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}
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}
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fn key_name(&mut self, start: usize) -> Option<String> {
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if self.eat('"') {
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return self.finish_string(start, false);
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}
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let mut ret = String::new();
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loop {
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match self.cur.clone().next() {
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Some((_, ch)) => {
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match ch {
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'a' ... 'z' |
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'A' ... 'Z' |
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'0' ... '9' |
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'_' | '-' => { self.cur.next(); ret.push(ch) }
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_ => break,
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}
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}
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None => {}
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}
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}
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Some(ret)
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}
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// Parses the values into the given TomlTable. Returns true in case of success
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// and false in case of error.
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fn values(&mut self, into: &mut TomlTable) -> bool {
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loop {
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self.ws();
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if self.newline() { continue }
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match self.cur.clone().next() {
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Some((_, '#')) => { self.comment(); }
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if self.comment() { continue }
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match self.peek(0) {
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Some((_, '[')) => break,
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Some((start, _)) => {
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let mut key = String::new();
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let mut found_eq = false;
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for (pos, ch) in self.cur {
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match ch {
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' ' | '\t' => break,
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'=' => { found_eq = true; break }
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'\n' => {
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self.errors.push(ParserError {
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lo: start,
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hi: pos + 1,
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desc: format!("keys cannot be defined \
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across lines"),
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})
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Some(..) => {}
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None => break,
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}
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c => key.push(c),
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}
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}
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if !found_eq {
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let key_lo = self.next_pos();
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let key = match self.key_name(key_lo) {
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Some(s) => s,
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None => return false
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};
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self.ws();
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if !self.expect('=') { return false }
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}
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let value = match self.value() {
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Some(value) => value,
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None => return false,
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};
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self.insert(into, key, value, start);
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self.insert(into, key, value, key_lo);
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self.ws();
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self.comment();
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self.eat('\r');
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self.eat('\n');
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}
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None => break,
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}
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self.newline();
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}
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return true
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}
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@ -290,7 +295,6 @@ impl<'a> Parser<'a> {
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fn string(&mut self, start: usize) -> Option<Value> {
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if !self.expect('"') { return None }
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let mut multiline = false;
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let mut ret = String::new();
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// detect multiline literals, but be careful about empty ""
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// strings
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@ -300,10 +304,18 @@ impl<'a> Parser<'a> {
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self.newline();
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} else {
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// empty
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return Some(Value::String(ret))
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return Some(Value::String(String::new()))
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}
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}
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self.finish_string(start, multiline).map(Value::String)
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}
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// Finish parsing a basic string after the opening quote has been seen
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fn finish_string(&mut self,
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start: usize,
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multiline: bool) -> Option<String> {
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let mut ret = String::new();
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loop {
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while multiline && self.newline() { ret.push('\n') }
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match self.cur.next() {
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@ -312,7 +324,7 @@ impl<'a> Parser<'a> {
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if !self.eat('"') { ret.push_str("\""); continue }
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if !self.eat('"') { ret.push_str("\"\""); continue }
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}
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break
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return Some(ret)
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}
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Some((pos, '\\')) => {
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match escape(self, pos, multiline) {
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@ -340,8 +352,6 @@ impl<'a> Parser<'a> {
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}
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}
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return Some(Value::String(ret));
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fn escape(me: &mut Parser, pos: usize, multiline: bool) -> Option<char> {
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if multiline && me.newline() {
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while me.ws() || me.newline() { /* ... */ }
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@ -1065,4 +1075,40 @@ trimmed in raw strings.
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t!("2e+10", 2e10);
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t!("2e-10", 2e-10);
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}
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#[test]
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fn bare_key_names() {
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let mut p = Parser::new("
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foo = 3
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foo_3 = 3
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foo_-2--3--r23f--4-f2-4 = 3
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_ = 3
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- = 3
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8 = 8
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\"a\" = 3
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\"!\" = 3
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\"a^b\" = 3
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\"\\\"\" = 3
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");
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let table = Table(p.parse().unwrap());
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assert!(table.lookup("foo").is_some());
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assert!(table.lookup("-").is_some());
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assert!(table.lookup("_").is_some());
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assert!(table.lookup("8").is_some());
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assert!(table.lookup("foo_3").is_some());
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assert!(table.lookup("foo_-2--3--r23f--4-f2-4").is_some());
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assert!(table.lookup("a").is_some());
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assert!(table.lookup("!").is_some());
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assert!(table.lookup("\"").is_some());
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}
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#[test]
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fn bad_keys() {
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assert!(Parser::new("key\n=3").parse().is_none());
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assert!(Parser::new("key=\n3").parse().is_none());
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assert!(Parser::new("key|=3").parse().is_none());
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assert!(Parser::new("\"\"|=3").parse().is_none());
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assert!(Parser::new("\"\n\"|=3").parse().is_none());
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assert!(Parser::new("\"\r\"|=3").parse().is_none());
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}
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}
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@ -14,7 +14,7 @@ test_string = "You'll hate me after this - #" # " Annoying, isn't it?
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# Things will get harder
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[the.hard.bit#]
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what? = "You don't think some user won't do that?"
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"what?" = "You don't think some user won't do that?"
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multi_line_array = [
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"]",
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# ] Oh yes I did
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@ -1 +1 @@
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~!@#$^&*()_+-`1234567890[]\|/?><.,;:' = 1
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"~!@#$^&*()_+-`1234567890[]\\|/?><.,;:'" = 1
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@ -1 +1 @@
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key#name = 5
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"key#name" = 5
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