1 // So far instructions can only contain linear lists of properties. Now we add 2 // support for more complex trees of properties in dilated reagents. This will 3 // come in handy later for expressing complex types, like "a dictionary from 4 // (address to array of charaters) to (list of numbers)". 5 // 6 // Type trees aren't as general as s-expressions even if they look like them: 7 // the first element of a type tree is always an atom, and it can never be 8 // dotted (right->right->right->...->right is always NULL). 9 // 10 // For now you can't use the simpler 'colon-based' representation inside type 11 // trees. Once you start typing parens, keep on typing parens. 12 13 :(scenarios load) 14 :(scenario dilated_reagent_with_nested_brackets) 15 def main [ 16 {1: number, foo: (bar (baz quux))} <- copy 34 17 ] 18 +parse: product: {1: "number", "foo": ("bar" ("baz" "quux"))} 19 20 :(before "End Parsing Dilated Reagent Property(value)") 21 value = parse_string_tree(value); 22 :(before "End Parsing Dilated Reagent Type Property(type_names)") 23 type_names = parse_string_tree(type_names); 24 25 :(code) 26 string_tree* parse_string_tree(string_tree* s) { 27 assert(s->atom); 28 if (!starts_with(s->value, "(")) return s; 29 string_tree* result = parse_string_tree(s->value); 30 delete s; 31 return result; 32 } 33 34 string_tree* parse_string_tree(const string& s) { 35 istringstream in(s); 36 in >> std::noskipws; 37 return parse_string_tree(in); 38 } 39 40 string_tree* parse_string_tree(istream& in) { 41 skip_whitespace_but_not_newline(in); 42 if (!has_data(in)) return NULL; 43 if (in.peek() == ')') { 44 in.get(); 45 return NULL; 46 } 47 if (in.peek() != '(') { 48 string s = next_word(in); 49 if (s.empty())<<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html><head><title>Python: module ranger.gui.ui</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head><body bgcolor="#f0f0f8"> <table width="100%" cellspacing=0 cellpadding=2 border=0 summary="heading"> <tr bgcolor="#7799ee"> <td valign=bottom> <br> <font color="#ffffff" face="helvetica, arial"> <br><big><big><strong><a href="ranger.html"><font color="#ffffff">ranger</font></a>.<a href=&quo