|
| 1 | +module stdext.ddocmacros; |
| 2 | + |
| 3 | +import std.traits; |
| 4 | +import std.range; |
| 5 | +import std.ascii; |
| 6 | +import std.string; |
| 7 | + |
| 8 | +// version = LOG; |
| 9 | + |
| 10 | +version(LOG) import std.stdio; |
| 11 | + |
| 12 | +C[][] ddocArgs(C,S)(ref S src) |
| 13 | +{ |
| 14 | + C[][] args; |
| 15 | + C[] arg; |
| 16 | + |
| 17 | + if(!src.empty && src.front.isWhite) |
| 18 | + src.popFront; |
| 19 | + |
| 20 | + int parens = 0; |
| 21 | + while(!src.empty) |
| 22 | + { |
| 23 | + auto c = src.front; |
| 24 | + src.popFront; |
| 25 | + |
| 26 | + switch(c) |
| 27 | + { |
| 28 | + case ')': |
| 29 | + if(parens == 0) |
| 30 | + { |
| 31 | + args ~= arg; |
| 32 | + return args; |
| 33 | + } |
| 34 | + parens--; |
| 35 | + goto default; |
| 36 | + case '(': |
| 37 | + parens++; |
| 38 | + goto default; |
| 39 | + |
| 40 | + case ',': |
| 41 | + if(parens == 0) |
| 42 | + { |
| 43 | + args ~= arg; |
| 44 | + arg = arg.init; |
| 45 | + if(!src.empty && src.front.isWhite) |
| 46 | + src.popFront; |
| 47 | + break; |
| 48 | + } |
| 49 | + goto default; |
| 50 | + default: |
| 51 | + arg ~= c; |
| 52 | + break; |
| 53 | + } |
| 54 | + } |
| 55 | + version(LOG) writeln("ddocArgs = ", args); |
| 56 | + return args; |
| 57 | +} |
| 58 | + |
| 59 | +K ddocIdent(K, S)(ref S src) |
| 60 | +{ |
| 61 | + alias C = ElementEncodingType!S; |
| 62 | + K id; |
| 63 | + while(!src.empty) |
| 64 | + { |
| 65 | + C c = src.front; |
| 66 | + if(isAlpha(c) || c == '_' || isDigit(c)) |
| 67 | + { |
| 68 | + id ~= c; |
| 69 | + src.popFront; |
| 70 | + } |
| 71 | + else |
| 72 | + break; |
| 73 | + } |
| 74 | + version(LOG) writeln("ddocIdent = ", id); |
| 75 | + return id; |
| 76 | +} |
| 77 | + |
| 78 | +C[] joinArgs(C)(C[][] args, size_t first) |
| 79 | +{ |
| 80 | + C[] s; // use joiner? |
| 81 | + if(args.length > first) |
| 82 | + { |
| 83 | + s = args[first]; |
| 84 | + foreach(a; args[first + 1 .. $]) |
| 85 | + { |
| 86 | + s ~= ','; |
| 87 | + s ~= a; |
| 88 | + } |
| 89 | + } |
| 90 | + return s; |
| 91 | +} |
| 92 | + |
| 93 | +struct RangeStack(R) |
| 94 | +{ |
| 95 | + alias E = ElementType!R; |
| 96 | + alias C = ElementEncodingType!R; |
| 97 | + |
| 98 | + R[] stack; |
| 99 | + C[][][] arguments; |
| 100 | + |
| 101 | + @property bool empty() const { return stack.empty; } |
| 102 | + @property E front() const { return stack[$-1].front; } |
| 103 | + @property void popFront() |
| 104 | + { |
| 105 | + stack[$-1].popFront; |
| 106 | + if(stack[$-1].empty) |
| 107 | + { |
| 108 | + stack.length--; |
| 109 | + arguments.length--; |
| 110 | + } |
| 111 | + } |
| 112 | + void push(ref R r, C[][] args) |
| 113 | + { |
| 114 | + version(LOG) writeln("push = ", r); |
| 115 | + if(!r.empty) |
| 116 | + { |
| 117 | + stack ~= r.save; |
| 118 | + arguments ~= args; |
| 119 | + } |
| 120 | + } |
| 121 | + R getArg(dchar n) |
| 122 | + { |
| 123 | + if(arguments.empty) |
| 124 | + return null; |
| 125 | + |
| 126 | + if(n == '0') |
| 127 | + return joinArgs(arguments[$-1], 0); |
| 128 | + if(n == '+') |
| 129 | + return joinArgs(arguments[$-1], 1); |
| 130 | + size_t a = n - '0'; |
| 131 | + if(a <= arguments[$-1].length) |
| 132 | + return arguments[$-1][a - 1]; |
| 133 | + return null; |
| 134 | + } |
| 135 | +} |
| 136 | + |
| 137 | +S ddocExpand(S,AA)(S s, AA defs, bool keepUnknown) if(isInputRange!S) |
| 138 | +{ |
| 139 | + alias C = ElementEncodingType!S; |
| 140 | + alias K = KeyType!AA; |
| 141 | + alias V = ValueType!AA; |
| 142 | + |
| 143 | + RangeStack!S src; |
| 144 | + src.push(s, null); |
| 145 | + |
| 146 | + S res; |
| 147 | + while(!src.empty) |
| 148 | + { |
| 149 | + auto c = src.front; |
| 150 | + src.popFront; |
| 151 | + |
| 152 | + switch(c) |
| 153 | + { |
| 154 | + case '$': |
| 155 | + auto d = src.front; |
| 156 | + if(d == '(') |
| 157 | + { |
| 158 | + src.popFront; |
| 159 | + auto id = ddocIdent!(K)(src); |
| 160 | + auto args = ddocArgs!C(src); |
| 161 | + if(auto p = id in defs) |
| 162 | + { |
| 163 | + src.push(*p, args); |
| 164 | + } |
| 165 | + else if(keepUnknown) |
| 166 | + { |
| 167 | + res ~= c; |
| 168 | + res ~= d; |
| 169 | + res ~= id; |
| 170 | + string keepArgs = " $0)"; |
| 171 | + src.push(keepArgs, args); |
| 172 | + } |
| 173 | + break; |
| 174 | + } |
| 175 | + else if(isAlpha(d)) |
| 176 | + { |
| 177 | + auto id = ddocIdent!(K)(src); |
| 178 | + if(auto p = id in defs) |
| 179 | + { |
| 180 | + src.push(*p, null); |
| 181 | + } |
| 182 | + else if(keepUnknown) |
| 183 | + { |
| 184 | + res ~= c; |
| 185 | + res ~= id; |
| 186 | + } |
| 187 | + break; |
| 188 | + } |
| 189 | + else if(isDigit(d) || d == '+') |
| 190 | + { |
| 191 | + auto arg = src.getArg(d); |
| 192 | + src.popFront; |
| 193 | + src.push(arg, null); |
| 194 | + break; |
| 195 | + } |
| 196 | + goto default; |
| 197 | + default: |
| 198 | + res ~= c; |
| 199 | + break; |
| 200 | + } |
| 201 | + } |
| 202 | + return res; |
| 203 | +} |
| 204 | + |
| 205 | +string phobosDdocExpand(string txt) |
| 206 | +{ |
| 207 | + string[string] macros = |
| 208 | + [ |
| 209 | + "D" : "`$0`", |
| 210 | + "LINK" : "$0", |
| 211 | + "LINK2" : "$2", |
| 212 | + "XREF" : "$2", |
| 213 | + "UL" : "\n$0", |
| 214 | + "LI" : "\n* $0", |
| 215 | + ]; |
| 216 | + return ddocExpand(txt, macros, true); |
| 217 | +} |
| 218 | + |
| 219 | +unittest |
| 220 | +{ |
| 221 | + import std.stdio; |
| 222 | + |
| 223 | + string txt = "$(D d-code)"; |
| 224 | + string[string] macros = [ "D" : "$0", "LINK" : `<a href="$1">$+</a>` ]; |
| 225 | + string res = ddocExpand(txt, macros); |
| 226 | + version(LOG) writeln(res); |
| 227 | + assert(strip(res) == "d-code"); |
| 228 | + |
| 229 | + res = ddocExpand("link = $(LINK 1,2, 3,4)", macros); |
| 230 | + version(LOG) writeln(res); |
| 231 | + assert(strip(res) == `link = <a href="1">2,3,4</a>`); |
| 232 | +} |
| 233 | + |
| 234 | +version(unittest) {} |
| 235 | +void main() {} |
0 commit comments