<

), Array(Vec), Number(f64), StringVal(String), True, False, } impl JSONValue { pub fn id(&self) -> usize { match self { JSONValue::Object(_) => JSON_OBJECT, JSONValue::Array(_) => JSON_ARRAY, JSONValue::Number(_) => JSON_NUMBER, JSONValue::StringVal(_) => JSON_STRING, JSONValue::True => JSON_TRUE, JSONValue::False => JSON_FALSE, JSONValue::Null => JSON_NULL, } } pub fn number(&self) -> f64 { if let JSONValue::Number(n) = self { *n } else { 0.0 } } pub fn string(&self) -> &str { if let JSONValue::StringVal(s) = self { s.as_str() } else { "" } } pub fn object_len(&self) -> usize { if let JSONValue::Object(e) = self { e.len() } else { 0 } } pub fn array_len(&self) -> usize { if let JSONValue::Array(e) = self { e.len() } else { 0 } } } >> context_user_fields << pub string_value: String, >> ptype JSONValue; drop /\s+/; token lbrace /\{/; token rbrace /\}/; token lbracket /\[/; token rbracket /\]/; token comma /,/; token colon /:/; token number /-?(0|[1-9][0-9]*)(\.[0-9]+)?([eE][-+]?[0-9]+)?/ << let n: f64 = std::str::from_utf8(match_).unwrap().parse().unwrap(); $$ = JSONValue::Number(n); >> token true << $$ = JSONValue::True; >> token false << $$ = JSONValue::False; >> token null << $$ = JSONValue::Null; >> /"/ << $mode(string); ${context.string_value} = String::new(); >> string: token string /"/ << $$ = JSONValue::StringVal(std::mem::take(&mut ${context.string_value})); $mode(default); >> string: /\\"/ << ${context.string_value}.push('"'); >> string: /\\\\/ << ${context.string_value}.push('\\'); >> string: /\\\// << ${context.string_value}.push('/'); >> string: /\\b/ << ${context.string_value}.push('\u{0008}'); >> string: /\\f/ << ${context.string_value}.push('\u{000C}'); >> string: /\\n/ << ${context.string_value}.push('\n'); >> string: /\\r/ << ${context.string_value}.push('\r'); >> string: /\\t/ << ${context.string_value}.push('\t'); >> string: /\\u[0-9a-fA-F]{4}/ << /* Not actually going to encode the code point for this example... */ let s: String = ['{', match_[2] as char, match_[3] as char, match_[4] as char, match_[5] as char, '}'].iter().collect(); ${context.string_value}.push_str(&s); >> string: /[^\\]/ << ${context.string_value}.push(match_[0] as char); >> Start -> Value << $$ = $1; >> Value -> string << $$ = $1; >> Value -> number << $$ = $1; >> Value -> Object << $$ = $1; >> Value -> Array << $$ = $1; >> Value -> true << $$ = $1; >> Value -> false << $$ = $1; >> Value -> null << $$ = $1; >> Object -> lbrace rbrace << $$ = JSONValue::Object(Vec::new()); >> Object -> lbrace KeyValues rbrace << $$ = $2; >> KeyValues -> KeyValue << $$ = $1; >> KeyValues -> KeyValues comma KeyValue << let mut obj = $1; if let JSONValue::Object(kve) = $3 { if let JSONValue::Object(entries) = &mut obj { entries.extend(kve); } } $$ = obj; >> KeyValue -> string colon Value << let name = if let JSONValue::StringVal(s) = $1 { s } else { String::new() }; $$ = JSONValue::Object(vec![(name, $3)]); >> Array -> lbracket rbracket << $$ = JSONValue::Array(Vec::new()); >> Array -> lbracket Values rbracket << $$ = $2; >> Values -> Value << $$ = $1; >> Values -> Values comma Value << let mut arr = $1; if let JSONValue::Array(elems) = &mut arr { elems.push($3); } $$ = arr; >>