11 11 12 12 /// Exception from this module 13 13 14 14 class LexException : Exception 15 15 { 16 16 const LexPosition pos; 17 17 18 - this( const LexPosition pos, string msg, string file="", int line=0 ) 19 - { super(sprintf!"[%s] %s"(pos, msg), file, line); this.pos = pos; } 18 + this( const LexPosition pos, string msg, string file="", int line=0, Throwable next=null ) 19 + { super(sprintf!"[%s] %s"(pos, msg), file, line, next); this.pos = pos; } 20 20 }; 21 21 22 22 /// Represents a position in a source code 23 23 24 24 class LexPosition 25 25 { 26 26 immutable string filename; /// name of the source file ................................................................................ 34 34 static immutable LexPosition dummy; 35 35 static this(){ dummy = new immutable(LexPosition)("<unnamed>",0,0); } 36 36 } 37 37 38 38 unittest 39 39 { 40 40 auto p = new LexPosition("hello.cpp", 123, 45); 41 - auto q = new LexPosition("hello.cpp", 123, 46); 42 41 43 42 assert_eq( p.filename, "hello.cpp" ); 44 43 assert_eq( p.lineno, 123 ); 45 44 assert_eq( p.column, 45 ); 46 45 assert_eq( to!string(p), "hello.cpp:123:45" ); 47 - assert_lt( p, q ); 48 - assert_ne( p, q ); 49 46 50 47 assert( !__traits(compiles, new LexPosition) ); 51 48 assert( !__traits(compiles, p.filename="foo") ); 52 49 assert( !__traits(compiles, p.lineno =789) ); 53 50 assert( !__traits(compiles, p.column =222) ); 51 + 52 + auto q = new LexPosition("hello.cpp", 123, 46); 53 + assert_lt( p, q ); 54 + assert_ne( p, q ); 54 55 } 55 56 56 57 /// Represents a lexer token 57 58 58 59 class Token 59 60 { 60 61 immutable LexPosition pos; /// Position where the token occurred in the source ................................................................................ 157 158 bool isLetter (dchar c) { return !isSpace(c) && !isSymbol(c); } 158 159 } 159 160 160 161 string readQuoted(const LexPosition pos){char[] buf; return readQuoted(pos,buf);} 161 162 string readQuoted(const LexPosition pos, ref char[] buf) 162 163 { 163 164 if( reader.empty ) 164 - throw new LexException(pos, "EOF found while lexing a quoted-string"); 165 + throw genex!LexException(pos, "EOF found while lexing a quoted-string"); 165 166 dchar c = reader.front; 166 167 reader.popFront; 167 168 if( c == '"' ) 168 169 return assumeUnique(buf); 169 170 if( c == '\\' && !reader.empty ) { 170 171 if( reader.front=='"' ) { 171 172 reader.popFront; ................................................................................ 223 224 } 224 225 } 225 226 } 226 227 227 228 unittest 228 229 { 229 230 assert( std.range.isForwardRange!(Lexer) ); 231 + assert( is(ElementType!(Lexer) == Token) ); 230 232 } 231 233 232 234 unittest 233 235 { 234 236 auto lex = lexerFromString("this is a \t\r\n pen :-( @@; "); 235 237 Token[] ts = std.array.array(lex); 236 238