Mercurial > projects > dil
view trunk/src/dil/Token.d @ 372:eb08126cca56
- Applied patch by Jari-Matti M?kel?. Should compile with tangobos now.
author | aziz |
---|---|
date | Thu, 06 Sep 2007 12:31:01 +0000 |
parents | 511c14950cac |
children | 6a5fc22cae34 |
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/++ Author: Aziz Köksal License: GPL3 +/ module dil.Token; import std.c.stdlib : malloc, free; import std.outofmemory; struct Position { size_t loc; size_t col; } enum TOK : ushort { Invalid, /// Flag for whitespace tokens that must be ignored in the parsing phase. Whitespace = 0x8000, Comment = 1 | Whitespace, Shebang = 2 | Whitespace, HashLine = 3 | Whitespace, Filespec = 4 | Whitespace, Identifier = 5, String, CharLiteral, WCharLiteral, DCharLiteral, // Special tokens FILE, LINE, DATE, TIME, TIMESTAMP, VENDOR, VERSION, // Number literals Int32, Int64, Uint32, Uint64, // Floating point number scanner relies on this order. (FloatXY + 3 == ImaginaryXY) Float32, Float64, Float80, Imaginary32, Imaginary64, Imaginary80, // Brackets LParen, RParen, LBracket, RBracket, LBrace, RBrace, Dot, Slice, Ellipses, // Floating point number operators Unordered, UorE, UorG, UorGorE, UorL, UorLorE, LorEorG, LorG, // Normal operators Assign, Equal, NotEqual, Not, LessEqual, Less, GreaterEqual, Greater, LShiftAssign, LShift, RShiftAssign,RShift, URShiftAssign, URShift, OrAssign, OrLogical, OrBinary, AndAssign, AndLogical, AndBinary, PlusAssign, PlusPlus, Plus, MinusAssign, MinusMinus, Minus, DivAssign, Div, MulAssign, Mul, ModAssign, Mod, XorAssign, Xor, CatAssign, Catenate, Tilde, Identity, NotIdentity, Colon, Semicolon, Question, Comma, Dollar, /* Keywords: NB.: Token.isKeyword() depends on this list being contiguous. */ Abstract,Alias,Align,Asm,Assert,Auto,Body, Bool,Break,Byte,Case,Cast,Catch,Cdouble, Cent,Cfloat,Char,Class,Const,Continue,Creal, Dchar,Debug,Default,Delegate,Delete,Deprecated,Do, Double,Else,Enum,Export,Extern,False,Final, Finally,Float,For,Foreach,Foreach_reverse,Function,Goto, Idouble,If,Ifloat,Import,In,Inout,Int, Interface,Invariant,Ireal,Is,Lazy,Long,Macro/+D2.0+/, Mixin,Module,New,Null,Out,Override,Package, Pragma,Private,Protected,Public,Real,Ref/+D2.0+/,Return, Scope,Short,Static,Struct,Super,Switch,Synchronized, Template,This,Throw,Traits/+D2.0+/,True,Try,Typedef,Typeid, Typeof,Ubyte,Ucent,Uint,Ulong,Union,Unittest, Ushort,Version,Void,Volatile,Wchar,While,With, HEAD, // start of linked list EOF, MAX } alias TOK.Abstract KeywordsBegin; alias TOK.With KeywordsEnd; struct Token { TOK type; // Position pos; Token* next, prev; char* start; char* end; union { struct { Token* line_num; // #line number Token* line_filespec; // #line number filespec } struct { string str; char pf; } dchar dchar_; long long_; ulong ulong_; int int_; uint uint_; float float_; double double_; real real_; } alias srcText identifier; string srcText() { assert(start && end); return start[0 .. end - start]; } /// Find next non-whitespace token. Returns 'this' token if the next token is TOK.EOF or null. Token* nextNWS() out(token) { assert(token !is null); } body { auto token = next; while (token !is null && token.isWhitespace) token = token.next; if (token is null || token.type == TOK.EOF) return this; return token; } /// Find previous non-whitespace token. Returns 'this' token if the previous token is TOK.HEAD or null. Token* prevNWS() out(token) { assert(token !is null); } body { auto token = prev; while (token !is null && token.isWhitespace) token = token.prev; if (token is null || token.type == TOK.HEAD) return this; return token; } static string toString(TOK tok) { return tokToString[tok]; } bool isKeyword() { return KeywordsBegin <= type && type <= KeywordsEnd; } bool isWhitespace() { return !!(type & TOK.Whitespace); } bool isSpecialToken() { return *start == '_' && type != TOK.Identifier; } int opEquals(TOK type2) { return type == type2; } new(size_t size) { void* p = malloc(size); if (p is null) version(Tango) throw new OutOfMemoryException(__FILE__, __LINE__); else throw new OutOfMemoryException(); *cast(Token*)p = Token.init; return p; } delete(void* p) { free(p); } } const string[] tokToString = [ "Invalid", "Comment", "#! /shebang/", "#line", `"filespec"`, "Identifier", "String", "CharLiteral", "WCharLiteral", "DCharLiteral", "__FILE__", "__LINE__", "__DATE__", "__TIME__", "__TIMESTAMP__", "__VENDOR__", "__VERSION__", "Int32", "Int64", "Uint32", "Uint64", "Float32", "Float64", "Float80", "Imaginary32", "Imaginary64", "Imaginary80", "(", ")", "[", "]", "{", "}", ".", "..", "...", "Unordered", "UorE", "UorG", "UorGorE", "UorL", "UorLorE", "LorEorG", "LorG", "=", "==", "!=", "!", "<=", "<", ">=", ">", "<<=", "<<", ">>=",">>", ">>>=", ">>>", "|=", "||", "|", "&=", "&&", "&", "+=", "++", "+", "-=", "--", "-", "/=", "/", "*=", "*", "%=", "%", "^=", "^", "~=", "~", "~", "is", "!is", ":", ";", "?", ",", "$", "abstract","alias","align","asm","assert","auto","body", "bool","break","byte","case","cast","catch","cdouble", "cent","cfloat","char","class","const","continue","creal", "dchar","debug","default","delegate","delete","deprecated","do", "double","else","enum","export","extern","false","final", "finally","float","for","foreach","foreach_reverse","function","goto", "idouble","if","ifloat","import","in","inout","int", "interface","invariant","ireal","is","lazy","long","macro", "mixin","module","new","null","out","override","package", "pragma","private","protected","public","real","ref","return", "scope","short","static","struct","super","switch","synchronized", "template","this","throw","__traits","true","try","typedef","typeid", "typeof","ubyte","ucent","uint","ulong","union","unittest", "ushort","version","void","volatile","wchar","while","with", "HEAD", "EOF" ]; static assert(tokToString.length == TOK.MAX);