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Do not allocate when lexing keywords and operators

This commit is contained in:
Hackerpilot 2013-02-01 01:42:20 -08:00
parent a5ed81b711
commit bd4f5cd85a
3 changed files with 540 additions and 79 deletions
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232
codegen/slicegen.d Normal file
View File

@ -0,0 +1,232 @@
import std.stdio;
import std.algorithm;
string[] opkwds = [
"=", // Assign
"@", // At
"&", // BitAnd
"&=", // BitAndEquals
"|", // BitOr
"|=", // BitOrEquals
"~=", // CatEquals
":", // Colon
",", // Comma
"--", // Decrement
"/", // Div
"/=", // DivEquals
"$", // Dollar
".", // Dot
"==", // Equals
"=>", // GoesTo
">", // Greater
">=", // GreaterEqual
"#", // Hash
"++", // Increment
"{", // LBrace
"[", // LBracket
"<", // Less
"<=", // LessEqual
"<>=", // LessEqualGreater
"<>", // LessOrGreater
"&&", // LogicAnd
"||", // LogicOr
"(", // LParen
"-", // Minus
"-=", // MinusEquals
"%", // Mod
"%=", // ModEquals
"*=", // MulEquals
"!", // Not
"!=", // NotEquals
"!>", // NotGreater
"!>=", // NotGreaterEqual
"!<", // NotLess
"!<=", // NotLessEqual
"!<>", // NotLessEqualGreater
"+", // Plus
"+=", // PlusEquals
"^^", // Pow
"^^=", // PowEquals
"}", // RBrace
"]", // RBracket
")", // RParen
";", // Semicolon
"<<", // ShiftLeft
"<<=", // ShiftLeftEqual
">>", // ShiftRight
">>=", // ShiftRightEqual
"..", // Slice
"*", // Star
"?", // Ternary
"~", // Tilde
"!<>=", // Unordered
">>>", // UnsignedShiftRight
">>>=", // UnsignedShiftRightEqual
"...", // Vararg
"^", // Xor
"^=", // XorEquals
"bool",
"byte",
"cdouble",
"cent",
"cfloat",
"char",
"creal",
"dchar",
"double",
"dstring",
"float",
"function",
"idouble",
"ifloat",
"int",
"ireal",
"long",
"real",
"short",
"string",
"ubyte",
"ucent",
"uint",
"ulong",
"ushort",
"void",
"wchar",
"wstring",
"align",
"deprecated",
"extern",
"pragma",
"export",
"package",
"private",
"protected",
"public",
"abstract",
"auto",
"const",
"final",
"__gshared",
"immutable",
"inout",
"scope",
"shared",
"static",
"synchronized",
"alias",
"asm",
"assert",
"body",
"break",
"case",
"cast",
"catch",
"class",
"continue",
"debug",
"default",
"delegate",
"delete",
"do",
"else",
"enum",
"false",
"finally",
"foreach",
"foreach_reverse",
"for",
"goto",
"if",
"import",
"in",
"interface",
"invariant",
"is",
"lazy",
"macro",
"mixin",
"module",
"new",
"nothrow",
"null",
"out",
"override",
"pure",
"ref",
"return",
"struct",
"super",
"switch",
"template",
"this",
"throw",
"true",
"try",
"typedef",
"typeid",
"typeof",
"union",
"unittest",
"version",
"volatile",
"while",
"with",
"__DATE__",
"__EOF__",
"__TIME__",
"__TIMESTAMP__",
"__VENDOR__",
"__VERSION__",
"__FILE__",
"__LINE__",
null, // Comment
null, // Identifier
null, // ScriptLine
"__traits",
"__parameters",
"__vector",
null, // Whitespace
null, // SpecialTokenSequence
null, // DoubleLiteral
null, // FloatLiteral
null, // IDoubleLiteral
null, // IFloatLiteral
null, // IntLiteral
null, // LongLiteral
null, // RealLiteral
null, // IRealLiteral
null, // UnsignedIntLiteral
null, // UnsignedLongLiteral
null, // DStringLiteral
null, // StringLiteral
null, // WStringLiteral
];
immutable string opKwdValues =
"#/=*=+=++-=--^^=~=<<=%==>>>=||=&&=,;:!<=!<>=!=!>=?...()[]{}@$"
~ "boolcdoublecentcfloatcrealdchardstringfunctionidoubleifloatirealubyte"
~ "ucentuintulongushortvoidwcharwstringaligndeprecatedexternpragmaexport"
~ "packageprivateprotectedpublicabstractautoconstfinal__gsharedimmutable"
~ "inoutscopesharedstaticsynchronizedaliasasmassertbodybreakcasecastcatch"
~ "classcontinuedebugdefaultdelegatedeleteelseenumfalsefinally"
~ "foreach_reversegotoimportinterfaceinvariantlazymacromixinmodule"
~ "newnothrownulloverridepurerefreturnstructsuperswitchtemplatethistruetry"
~ "typedeftypeidtypeofunionunittestversionvolatilewhilewith__traits"
~ "__vector__parameters__DATE__EOF__TIME__TIMESTAMP__VENDOR__VERSION__"
~ "FILE__LINE__";
void main(string[] args)
{
writeln("immutable(string[]) tokenValues = [");
foreach (s; opkwds)
{
if (s is null)
{
writeln("\tnull,");
continue;
}
auto n = opKwdValues.countUntil(s);
writeln("\topKwdValues[", n, " .. ", n + s.length, "], // ", s);
}
writeln("];");
}

17
main.d
View File

@ -115,13 +115,14 @@ int main(string[] args)
bool format;
bool help;
bool tokenCount;
bool frequencyCount;
try
{
getopt(args, "I", &importDirs,/+ "dotComplete", &dotComplete,+/ "sloc", &sloc,
/+"json", &json,+/ /+"parenComplete", &parenComplete,+/ "highlight", &highlight,
"ctags", &ctags, "recursive|r|R", &recursiveCtags, "help|h", &help,
"tokenCount", &tokenCount);
"tokenCount", &tokenCount, "frequencyCount", &frequencyCount);
}
catch (Exception e)
{
@ -129,7 +130,7 @@ int main(string[] args)
}
if (help || (!sloc && /+!dotComplete &&+/ /+!json &&+/ /+!parenComplete &&+/ !highlight
&& !ctags && !format && !tokenCount))
&& !ctags && !format && !tokenCount && !frequencyCount))
{
printHelp();
return 0;
@ -148,6 +149,18 @@ int main(string[] args)
writeln(args[1..$].map!(a => byToken(cast(ubyte[]) File(a).byLine(KeepTerminator.yes).join(), a).walkLength())());
/+}+/
}
else if (frequencyCount)
{
uint[TokenType] frequency;
foreach (t; byToken(cast(ubyte[]) File(args[1]).byLine(KeepTerminator.yes).join()))
{
frequency[t.type]++;
}
foreach (k, v; frequency)
{
writeln(v, ":", cast(TokenType) k);
}
}
/+if (sloc)
{

336
std/d/lexer.d
View File

@ -313,14 +313,14 @@ struct TokenRange(R) if (isForwardRange!(R))
advance();
switch (current.type)
{
case TokenType.Comment:
if (iterStyle & IterationStyle.IncludeComments)
break loop;
break;
case TokenType.Whitespace:
if (iterStyle & IterationStyle.IncludeWhitespace)
break loop;
break;
case TokenType.Comment:
if (iterStyle & IterationStyle.IncludeComments)
break loop;
break;
case TokenType.SpecialTokenSequence:
if (iterStyle & IterationStyle.IncludeSpecialTokens)
break loop;
@ -365,6 +365,7 @@ private:
{
mixin(generateCaseTrie(
"=", "TokenType.Assign",
"@", "TokenType.At",
"&", "TokenType.BitAnd",
"&=", "TokenType.BitAndEquals",
"|", "TokenType.BitOr",
@ -372,19 +373,21 @@ private:
"~=", "TokenType.CatEquals",
":", "TokenType.Colon",
",", "TokenType.Comma",
"--", "TokenType.Decrement",
"$", "TokenType.Dollar",
".", "TokenType.Dot",
"==", "TokenType.Equals",
"=>", "TokenType.GoesTo",
">", "TokenType.Greater",
">=", "TokenType.GreaterEqual",
"&&", "TokenType.LogicAnd",
"++", "TokenType.Increment",
"{", "TokenType.LBrace",
"[", "TokenType.LBracket",
"<", "TokenType.Less",
"<=", "TokenType.LessEqual",
"<>=", "TokenType.LessEqualGreater",
"<>", "TokenType.LessOrGreater",
"&&", "TokenType.LogicAnd",
"||", "TokenType.LogicOr",
"(", "TokenType.LParen",
"-", "TokenType.Minus",
@ -415,42 +418,13 @@ private:
"*", "TokenType.Star",
"?", "TokenType.Ternary",
"~", "TokenType.Tilde",
"--", "TokenType.Decrement",
"!<>=", "TokenType.Unordered",
">>>", "TokenType.UnsignedShiftRight",
">>>=", "TokenType.UnsignedShiftRightEqual",
"++", "TokenType.Increment",
"...", "TokenType.Vararg",
"^", "TokenType.Xor",
"^=", "TokenType.XorEquals",
"@", "TokenType.At",
));
case '0': .. case '9':
current = lexNumber(range, index, lineNumber, buffer);
break;
case '\'':
case '"':
current = lexString(range, index, lineNumber, buffer, stringStyle);
break;
case '`':
current = lexString(range, index, lineNumber, buffer, stringStyle);
break;
case 'q':
auto r = range.save;
r.popFront();
if (!r.isEoF() && r.front == '{')
{
current = lexTokenString(range, index, lineNumber, buffer, stringStyle);
break;
}
else if (!r.isEoF() && r.front == '"')
{
current = lexDelimitedString(range, index, lineNumber,
buffer, stringStyle);
break;
}
else
goto default;
case '/':
auto r = range.save();
r.popFront();
@ -484,6 +458,32 @@ private:
range.popFront();
break outer;
}
case '0': .. case '9':
current = lexNumber(range, index, lineNumber, buffer);
break;
case '\'':
case '"':
current = lexString(range, index, lineNumber, buffer, stringStyle);
break;
case '`':
current = lexString(range, index, lineNumber, buffer, stringStyle);
break;
case 'q':
auto r = range.save;
r.popFront();
if (!r.isEoF() && r.front == '{')
{
current = lexTokenString(range, index, lineNumber, buffer, stringStyle);
break;
}
else if (!r.isEoF() && r.front == '"')
{
current = lexDelimitedString(range, index, lineNumber,
buffer, stringStyle);
break;
}
else
goto default;
case 'r':
auto r = range.save();
r.popFront();
@ -515,8 +515,11 @@ private:
range.popFront();
++index;
}
current.type = lookupTokenType(cast(char[]) buffer[0 .. i]);
current.value = getTokenValue(current.type);
if (current.value is null)
current.value = (cast(char[]) buffer[0 .. i]).idup;
current.type = lookupTokenType(current.value);
if (!(iterStyle & IterationStyle.IgnoreEOF) && current.type == TokenType.EOF)
{
@ -692,16 +695,16 @@ enum TokenType: ushort
Dollar, /// $
Dot, /// .
Equals, /// ==
GoesTo, // =>
GoesTo, /// =>
Greater, /// >
GreaterEqual, /// >=
Hash, // #
Hash, /// #
Increment, /// ++
LBrace, /// {
LBracket, /// [
Less, /// <
LessEqual, /// <=
LessEqualGreater, // <>=
LessEqualGreater, /// <>=
LessOrGreater, /// <>
LogicAnd, /// &&
LogicOr, /// ||
@ -730,7 +733,7 @@ enum TokenType: ushort
ShiftLeftEqual, /// <<=
ShiftRight, /// >>
ShiftRightEqual, /// >>=
Slice, // ..
Slice, /// ..
Star, /// *
Ternary, /// ?
Tilde, /// ~
@ -858,11 +861,12 @@ enum TokenType: ushort
CompilerVersion, /// ___VERSION__
File, /// ___FILE__
Line, /// ___LINE__
Thread, /// ___thread
Traits, /// ___traits
Comment, /// $(D_COMMENT /** comment */) or $(D_COMMENT // comment) or $(D_COMMENT ///comment)
Identifier, /// anything else
ScriptLine, // Line at the beginning of source file that starts from #!
Traits, /// $(D_KEYWORD ___traits)
Parameters, /// $(D_KEYWORD ___parameters)
Vector, /// $(D_KEYWORD ___vector)
Whitespace, /// whitespace
SpecialTokenSequence, /// #line 10 "file.d"
DoubleLiteral, /// 123.456
@ -883,6 +887,233 @@ enum TokenType: ushort
// Implementation details follow
private:
/*
* To avoid memory allocations Token.value is set to a slice of this string
* for operators and keywords.
*/
immutable string opKwdValues =
"#/=*=+=++-=--^^=~=<<=%==>>>=||=&&=,;:!<=!<>=!=!>=?...()[]{}@$"
~ "boolcdoublecentcfloatcrealdchardstringfunctionidoubleifloatirealubyte"
~ "ucentuintulongushortvoidwcharwstringaligndeprecatedexternpragmaexport"
~ "packageprivateprotectedpublicabstractautoconstfinal__gsharedimmutable"
~ "inoutscopesharedstaticsynchronizedaliasasmassertbodybreakcasecastcatch"
~ "classcontinuedebugdefaultdelegatedeleteelseenumfalsefinally"
~ "foreach_reversegotoimportinterfaceinvariantlazymacromixinmodule"
~ "newnothrownulloverridepurerefreturnstructsuperswitchtemplatethistruetry"
~ "typedeftypeidtypeofunionunittestversionvolatilewhilewith__traits"
~ "__vector__parameters__DATE__EOF__TIME__TIMESTAMP__VENDOR__VERSION__"
~ "FILE__LINE__";
/*
* Slices of the above string. This array is automatically generated.
*/
immutable(string[TokenType.max + 1]) tokenValues = [
opKwdValues[2 .. 3], // =
opKwdValues[59 .. 60], // @
opKwdValues[31 .. 32], // &
opKwdValues[32 .. 34], // &=
opKwdValues[28 .. 29], // |
opKwdValues[29 .. 31], // |=
opKwdValues[16 .. 18], // ~=
opKwdValues[36 .. 37], // :
opKwdValues[34 .. 35], // ,
opKwdValues[11 .. 13], // --
opKwdValues[1 .. 2], // /
opKwdValues[1 .. 3], // /=
opKwdValues[60 .. 61], // $
opKwdValues[50 .. 51], // .
opKwdValues[22 .. 24], // ==
opKwdValues[23 .. 25], // =>
opKwdValues[24 .. 25], // >
opKwdValues[26 .. 28], // >=
opKwdValues[0 .. 1], // #
opKwdValues[7 .. 9], // ++
opKwdValues[57 .. 58], // {
opKwdValues[55 .. 56], // [
opKwdValues[18 .. 19], // <
opKwdValues[19 .. 21], // <=
opKwdValues[41 .. 44], // <>=
opKwdValues[41 .. 43], // <>
opKwdValues[31 .. 33], // &&
opKwdValues[28 .. 30], // ||
opKwdValues[53 .. 54], // (
opKwdValues[9 .. 10], // -
opKwdValues[9 .. 11], // -=
opKwdValues[21 .. 22], // %
opKwdValues[21 .. 23], // %=
opKwdValues[3 .. 5], // *=
opKwdValues[37 .. 38], // !
opKwdValues[44 .. 46], // !=
opKwdValues[46 .. 48], // !>
opKwdValues[46 .. 49], // !>=
opKwdValues[37 .. 39], // !<
opKwdValues[37 .. 40], // !<=
opKwdValues[40 .. 43], // !<>
opKwdValues[5 .. 6], // +
opKwdValues[5 .. 7], // +=
opKwdValues[13 .. 15], // ^^
opKwdValues[13 .. 16], // ^^=
opKwdValues[58 .. 59], // }
opKwdValues[56 .. 57], // ]
opKwdValues[54 .. 55], // )
opKwdValues[35 .. 36], // ;
opKwdValues[18 .. 20], // <<
opKwdValues[18 .. 21], // <<=
opKwdValues[24 .. 26], // >>
opKwdValues[25 .. 28], // >>=
opKwdValues[50 .. 52], // ..
opKwdValues[3 .. 4], // *
opKwdValues[49 .. 50], // ?
opKwdValues[16 .. 17], // ~
opKwdValues[40 .. 44], // !<>=
opKwdValues[24 .. 27], // >>>
opKwdValues[24 .. 28], // >>>=
opKwdValues[50 .. 53], // ...
opKwdValues[13 .. 14], // ^
opKwdValues[14 .. 16], // ^=
opKwdValues[61 .. 65], // bool
opKwdValues[126 .. 130], // byte
opKwdValues[65 .. 72], // cdouble
opKwdValues[72 .. 76], // cent
opKwdValues[76 .. 82], // cfloat
opKwdValues[88 .. 92], // char
opKwdValues[82 .. 87], // creal
opKwdValues[87 .. 92], // dchar
opKwdValues[66 .. 72], // double
opKwdValues[92 .. 99], // dstring
opKwdValues[77 .. 82], // float
opKwdValues[99 .. 107], // function
opKwdValues[107 .. 114], // idouble
opKwdValues[114 .. 120], // ifloat
opKwdValues[136 .. 139], // int
opKwdValues[120 .. 125], // ireal
opKwdValues[140 .. 144], // long
opKwdValues[83 .. 87], // real
opKwdValues[145 .. 150], // short
opKwdValues[93 .. 99], // string
opKwdValues[125 .. 130], // ubyte
opKwdValues[130 .. 135], // ucent
opKwdValues[135 .. 139], // uint
opKwdValues[139 .. 144], // ulong
opKwdValues[144 .. 150], // ushort
opKwdValues[150 .. 154], // void
opKwdValues[154 .. 159], // wchar
opKwdValues[159 .. 166], // wstring
opKwdValues[166 .. 171], // align
opKwdValues[171 .. 181], // deprecated
opKwdValues[181 .. 187], // extern
opKwdValues[187 .. 193], // pragma
opKwdValues[193 .. 199], // export
opKwdValues[199 .. 206], // package
opKwdValues[206 .. 213], // private
opKwdValues[213 .. 222], // protected
opKwdValues[222 .. 228], // public
opKwdValues[228 .. 236], // abstract
opKwdValues[236 .. 240], // auto
opKwdValues[240 .. 245], // const
opKwdValues[245 .. 250], // final
opKwdValues[250 .. 259], // __gshared
opKwdValues[259 .. 268], // immutable
opKwdValues[268 .. 273], // inout
opKwdValues[273 .. 278], // scope
opKwdValues[253 .. 259], // shared
opKwdValues[284 .. 290], // static
opKwdValues[290 .. 302], // synchronized
opKwdValues[302 .. 307], // alias
opKwdValues[307 .. 310], // asm
opKwdValues[310 .. 316], // assert
opKwdValues[316 .. 320], // body
opKwdValues[320 .. 325], // break
opKwdValues[325 .. 329], // case
opKwdValues[329 .. 333], // cast
opKwdValues[333 .. 338], // catch
opKwdValues[338 .. 343], // class
opKwdValues[343 .. 351], // continue
opKwdValues[351 .. 356], // debug
opKwdValues[356 .. 363], // default
opKwdValues[363 .. 371], // delegate
opKwdValues[371 .. 377], // delete
opKwdValues[66 .. 68], // do
opKwdValues[377 .. 381], // else
opKwdValues[381 .. 385], // enum
opKwdValues[385 .. 390], // false
opKwdValues[390 .. 397], // finally
opKwdValues[397 .. 404], // foreach
opKwdValues[397 .. 412], // foreach_reverse
opKwdValues[397 .. 400], // for
opKwdValues[412 .. 416], // goto
opKwdValues[114 .. 116], // if
opKwdValues[416 .. 422], // import
opKwdValues[96 .. 98], // in
opKwdValues[422 .. 431], // interface
opKwdValues[431 .. 440], // invariant
opKwdValues[522 .. 524], // is
opKwdValues[440 .. 444], // lazy
opKwdValues[444 .. 449], // macro
opKwdValues[449 .. 454], // mixin
opKwdValues[454 .. 460], // module
opKwdValues[460 .. 463], // new
opKwdValues[463 .. 470], // nothrow
opKwdValues[470 .. 474], // null
opKwdValues[270 .. 273], // out
opKwdValues[474 .. 482], // override
opKwdValues[482 .. 486], // pure
opKwdValues[486 .. 489], // ref
opKwdValues[489 .. 495], // return
opKwdValues[495 .. 501], // struct
opKwdValues[501 .. 506], // super
opKwdValues[506 .. 512], // switch
opKwdValues[512 .. 520], // template
opKwdValues[520 .. 524], // this
opKwdValues[465 .. 470], // throw
opKwdValues[524 .. 528], // true
opKwdValues[528 .. 531], // try
opKwdValues[531 .. 538], // typedef
opKwdValues[538 .. 544], // typeid
opKwdValues[544 .. 550], // typeof
opKwdValues[550 .. 555], // union
opKwdValues[555 .. 563], // unittest
opKwdValues[563 .. 570], // version
opKwdValues[570 .. 578], // volatile
opKwdValues[578 .. 583], // while
opKwdValues[583 .. 587], // with
opKwdValues[615 .. 623], // __DATE__
opKwdValues[621 .. 628], // __EOF__
opKwdValues[626 .. 634], // __TIME__
opKwdValues[632 .. 645], // __TIMESTAMP__
opKwdValues[643 .. 653], // __VENDOR__
opKwdValues[651 .. 662], // __VERSION__
opKwdValues[660 .. 668], // __FILE__
opKwdValues[666 .. 674], // __LINE__
null,
null,
null,
opKwdValues[587 .. 595], // __traits
opKwdValues[603 .. 615], // __parameters
opKwdValues[595 .. 603], // __vector
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
];
pure string getTokenValue(const TokenType type)
{
return tokenValues[type];
}
private pure bool isNewline(R)(R range)
{
return range.front == '\n' || range.front == '\r';
@ -2366,20 +2597,6 @@ unittest
pure nothrow bool isSeparating(ubyte ch)
{
/+switch (ch)
{
case '!': .. case '/':
case ':': .. case '@':
case '[': .. case '^':
case '{': .. case '~':
case '`':
case 0x20: // space
case 0x09: // tab
case 0x0a: .. case 0x0d: // newline, vertical tab, form feed, carriage return
return true;
default:
return false;
}+/
return (ch >= '!' && ch <= '/')
|| (ch >= ':' && ch <= '@')
|| (ch >= '[' && ch <= '^')
@ -2390,7 +2607,7 @@ pure nothrow bool isSeparating(ubyte ch)
|| ch == 0x0a;
}
pure nothrow TokenType lookupTokenType(const string input)
pure nothrow TokenType lookupTokenType(const const(char)[] input)
{
switch(input.length)
{
@ -2529,7 +2746,6 @@ pure nothrow TokenType lookupTokenType(const string input)
case "__LINE__": return TokenType.Line;
case "template": return TokenType.Template;
case "abstract": return TokenType.Abstract;
case "__thread": return TokenType.Thread;
case "__traits": return TokenType.Traits;
case "volatile": return TokenType.Volatile;
case "delegate": return TokenType.Delegate;
@ -2639,7 +2855,7 @@ string printCaseStatements(K, V)(TrieNode!(K,V) node, string indentString)
caseStatement ~= indentString;
caseStatement ~= "\t{\n";
caseStatement ~= indentString;
caseStatement ~= "\tcurrent.value = (cast(char[]) buffer[0 .. i]).idup;\n";
caseStatement ~= "\tcurrent.value = getTokenValue(current.type);\n";
caseStatement ~= indentString;
caseStatement ~= "\t\tcurrent.type = " ~ node.children[k].value;
caseStatement ~= ";\n";
@ -2659,7 +2875,7 @@ string printCaseStatements(K, V)(TrieNode!(K,V) node, string indentString)
caseStatement ~= v.value;
caseStatement ~= ";\n";
caseStatement ~= indentString;
caseStatement ~= "\tcurrent.value = (cast(char[]) buffer[0 .. i]).idup;\n";
caseStatement ~= "\tcurrent.value = getTokenValue(current.type);\n";
caseStatement ~= indentString;
caseStatement ~= "\t\tbreak;\n";
caseStatement ~= indentString;
@ -2674,7 +2890,7 @@ string printCaseStatements(K, V)(TrieNode!(K,V) node, string indentString)
caseStatement ~= v.value;
caseStatement ~= ";\n";
caseStatement ~= indentString;
caseStatement ~= "\tcurrent.value = (cast(char[]) buffer[0 .. i]).idup;\n";
caseStatement ~= "\tcurrent.value = getTokenValue(current.type);\n";
caseStatement ~= indentString;
caseStatement ~= "\tbreak;\n";
}