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1 files changed, 1 insertions, 1 deletions

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Mu - 016dilated_reagent.cc</title> <meta name="Generator" content="Vim/8.0"> <meta name="plugin-version" content="vim7.4_v2"> <meta name="syntax" content="cpp"> <meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy="> <meta name="colorscheme" content="minimal-light"> <style type="text/css">  </style> <script type='text/javascript'>  </script> </head> <body onload='JumpToLine();'> <a href='https://github.com/akkartik/mu/blob/master/016dilated_reagent.cc'>https://github.com/akkartik/mu/blob/master/016dilated_reagent.cc</a> <pre id='vimCodeElement'> 1 //: An alternative syntax for reagents that permits whitespace in properties, 2 //: grouped by brackets. We'll use this ability in the next layer, when we 3 //: generalize types from lists to trees of properties. 4 5 :(scenarios load) 6 :(scenario dilated_reagent) 7 def <a href='000organization.cc.html#L113'>main</a> [ 8 {1: number, foo: bar} <- copy 34 9 ] 10 +parse: product: {1: "number", "foo": "bar"} 11 12 :(scenario load_trailing_space_after_curly_bracket) 13 def <a href='000organization.cc.html#L113'>main</a> [ 14 # line below has a space at the end 15 { 16 ] 17 # successfully parsed 18 19 :(scenario dilated_reagent_with_comment) 20 def <a href='000organization.cc.html#L113'>main</a> [ 21 {1: number, foo: bar} <- copy 34 # test comment 22 ] 23 +parse: product: {1: "number", "foo": "bar"} 24 $error: 0 25 26 :(scenario dilated_reagent_with_comment_immediately_following) 27 def <a href='000organization.cc.html#L113'>main</a> [ 28 1:number <- copy {34: literal} # test comment 29 ] 30 $error: 0 31 32 //: First augment next_word to group balanced brackets together. 33 34 :(before "End <a href='011load.cc.html#L169'>next_word</a> Special-cases") 35 if (in.peek() == '(') 36 return <a href='016dilated_reagent.cc.html#L57'>slurp_balanced_bracket</a>(in); 37 // treat curlies mostly like parens, but don't mess up labels 38 if (<a href='016dilated_reagent.cc.html#L44'>start_of_dilated_reagent</a>(in)) 39 return <a href='016dilated_reagent.cc.html#L57'>slurp_balanced_bracket</a>(in); 40 41 :(code) 42 // A curly is considered a label if it's the last thing on a line. Dilated 43 // reagents should remain all on one line. 44 bool <a href='016dilated_reagent.cc.html#L44'>start_of_dilated_reagent</a>(istream& in) { 45 if (in.peek() != '{') return false; 46 int pos = in.tellg(); 47 in.get(); // slurp '{' 48 skip_whitespace_but_not_newline(in); 49 char next = in.peek(); 50 in.seekg(pos); 51 return next != '\n'; 52 } 53 54 // Assume the first letter is an open bracket, and read everything until the 55 // matching close bracket. 56 // We balance {} () and []. 57 string <a href='016dilated_reagent.cc.html#L57'>slurp_balanced_bracket</a>(istream& in) { 58 ostringstream result; 59 char c; 60 list<char> open_brackets; 61 while (in >> c) { 62 if (c == '(') open_brackets.push_back(c); 63 if (c == ')') { 64 if (open_brackets.empty() || open_brackets.back() != '(') { 65 <a href='003trace.cc.html#L196'>raise</a> << "unbalanced ')'\n" << <a href='003trace.cc.html#L225'>end</a>(); 66 continue; 67 } 68 assert(open_brackets.back() == '('); 69 open_brackets.pop_back(); 70 } 71 if (c == '[') open_brackets.push_back(c); 72 if (c == ']') { 73 if (open_brackets.empty() || open_brackets.back() != '[') { 74 <a href='003trace.cc.html#L196'>raise</a> << "unbalanced ']'\n" << <a href='003trace.cc.html#L225'>end</a>(); 75 continue; 76 } 77 open_brackets.pop_back(); 78 } 79 if (c == '{') open_brackets.push_back(c); 80 if (c == '}') { 81 if (open_brackets.empty() || open_brackets.back() != '{') { 82 <a href='003trace.cc.html#L196'>raise</a> << "unbalanced '}'\n" << <a href='003trace.cc.html#L225'>end</a>(); 83 continue; 84 } 85 open_brackets.pop_back(); 86 } 87 result << c; 88 if (open_brackets.empty()) break; 89 } 90 <a href='011load.cc.html#L222'>skip_whitespace_and_comments_but_not_newline</a>(in); 91 return result.str(); 92 } 93 94 :(after "Parsing reagent(string s)") 95 if (<a href='001help.cc.html#L77'>starts_with</a>(s, "{")) { 96 assert(properties.empty()); 97 istringstream in(s); 98 in >> std::noskipws; 99 in.get(); // skip '{' 100 name = <a href='016dilated_reagent.cc.html#L139'>slurp_key</a>(in); 101 if (name.empty()) { 102 <a href='003trace.cc.html#L196'>raise</a> << "invalid reagent '" << s << "' without a name\n" << <a href='003trace.cc.html#L225'>end</a>(); 103 return; 104 } 105 if (name == "}") { 106 <a href='003trace.cc.html#L196'>raise</a> << "invalid empty reagent '" << s << "'\n" << <a href='003trace.cc.html#L225'>end</a>(); 107 return; 108 } 109 { 110 string s = <a href='011load.cc.html#L169'>next_word</a>(in); 111 if (s.empty()) { 112 assert(!has_data(in)); 113 <a href='003trace.cc.html#L196'>raise</a> << "incomplete dilated reagent at <a href='003trace.cc.html#L225'>end</a> of file (0)\n" << <a href='003trace.cc.html#L225'>end</a>(); 114 return; 115 } 116 string_tree* type_names = new string_tree(s); 117 // End Parsing Dilated Reagent Type Property(type_names) 118 type = <a href='019type_abbreviations.cc.html#L58'>new_type_tree</a>(type_names); 119 delete type_names; 120 } 121 while (<a href='001help.cc.html#L239'>has_data</a>(in)) { 122 string key = <a href='016dilated_reagent.cc.html#L139'>slurp_key</a>(in); 123 if (key.empty()) continue; 124 if (key == "}") continue; 125 string s = <a href='011load.cc.html#L169'>next_word</a>(in); 126 if (s.empty()) { 127 assert(!has_data(in)); 128 <a href='003trace.cc.html#L196'>raise</a> << "incomplete dilated reagent at <a href='003trace.cc.html#L225'>end</a> of file (1)\n" << <a href='003trace.cc.html#L225'>end</a>(); 129 return; 130 } 131 string_tree* value = new string_tree(s); 132 // End Parsing Dilated Reagent Property(value) 133 properties.push_back(pair<string, string_tree*>(key, value)); 134 } 135 return; 136 } 137 138 :(code) 139 string <a href='016dilated_reagent.cc.html#L139'>slurp_key</a>(istream& in) { 140 string result = <a href='011load.cc.html#L169'>next_word</a>(in); 141 if (result.empty()) { 142 assert(!has_data(in)); 143 <a href='003trace.cc.html#L196'>raise</a> << "incomplete dilated reagent at <a href='003trace.cc.html#L225'>end</a> of file (2)\n" << <a href='003trace.cc.html#L225'>end</a>(); 144 return result; 145 } 146 while (!result.empty() && *result.rbegin() == ':') 147 <a href='014literal_string.cc.html#L144'>strip_last</a>(result); 148 while (isspace(in.peek()) || in.peek() == ':') 149 in.get(); 150 return result; 151 } </pre> </body> </html>


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