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Added all remaining operators with a view to completing expression evaluation

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git-svn-id: http://picoc.googlecode.com/svn/trunk@124 21eae674-98b7-11dd-bd71-f92a316d2d60
This commit is contained in:
zik.saleeba 2009-02-28 19:30:48 +00:00
parent 127f03eb4e
commit b6b75396dd
2 changed files with 20 additions and 14 deletions
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20
lex.c
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@ -12,6 +12,7 @@
#define NEXTIS(c,x,y) { if (NextChar == (c)) { Lexer->Pos++; GotToken = (x); } else GotToken = (y); }
#define NEXTIS3(c,x,d,y,z) { if (NextChar == (c)) { Lexer->Pos++; GotToken = (x); } else NEXTIS(d,y,z) }
#define NEXTIS4(c,x,d,y,e,z,a) { if (NextChar == (c)) { Lexer->Pos++; GotToken = (x); } else NEXTIS3(d,y,e,z,a) }
#define NEXTIS3PLUS(c,x,d,y,e,z,a) { if (NextChar == (c)) { Lexer->Pos++; GotToken = (x); } else if (NextChar == (d)) { if (Lexer->Pos[1] == (e)) { Lexer->Pos += 2; GotToken = (z); } else { Lexer->Pos++; GotToken = (y); } } else GotToken = (a); }
#define NEXTISEXACTLY3(c,d,y,z) { if (NextChar == (c) && Lexer->Pos[1] == (d)) { Lexer->Pos += 2; GotToken = (y); } else GotToken = (z); }
static union AnyValue LexAnyValue;
@ -48,6 +49,7 @@ static struct ReservedWord ReservedWords[] =
{ "long", TokenLongType, NULL },
{ "return", TokenReturn, NULL },
{ "signed", TokenSignedType, NULL },
{ "sizeof", TokenSizeof, NULL },
{ "short", TokenShortType, NULL },
{ "struct", TokenStructType, NULL },
{ "switch", TokenSwitch, NULL },
@ -308,22 +310,24 @@ enum LexToken LexScanGetToken(struct LexState *Lexer, struct Value **Value)
case '=': NEXTIS('=', TokenEquality, TokenAssign); break;
case '+': NEXTIS3('=', TokenAddAssign, '+', TokenIncrement, TokenPlus); break;
case '-': NEXTIS4('=', TokenSubtractAssign, '>', TokenArrow, '-', TokenDecrement, TokenMinus); break;
case '*': GotToken = TokenAsterisk; break;
case '/': if (NextChar == '/' || NextChar == '*') LexSkipComment(Lexer, NextChar); else GotToken = TokenSlash; break;
case '<': NEXTIS('=', TokenLessEqual, TokenLessThan); break;
case '>': NEXTIS('=', TokenGreaterEqual, TokenGreaterThan); break;
case '*': NEXTIS('=', TokenMultiplyAssign, TokenAsterisk); break;
case '/': if (NextChar == '/' || NextChar == '*') LexSkipComment(Lexer, NextChar); else NEXTIS('=', TokenDivideAssign, TokenSlash); break;
case '%': NEXTIS('=', TokenModulusAssign, TokenModulus); break;
case '<': NEXTIS3PLUS('=', TokenLessEqual, '<', TokenShiftLeft, '=', TokenShiftLeftAssign, TokenLessThan); break;
case '>': NEXTIS3PLUS('=', TokenGreaterEqual, '>', TokenShiftRight, '=', TokenShiftRightAssign, TokenGreaterThan); break;
case ';': GotToken = TokenSemicolon; break;
case '&': NEXTIS('&', TokenLogicalAnd, TokenAmpersand); break;
case '|': NEXTIS('|', TokenLogicalOr, TokenArithmeticOr); break;
case '&': NEXTIS3('=', TokenArithmeticAndAssign, '&', TokenLogicalAnd, TokenAmpersand); break;
case '|': NEXTIS3('=', TokenArithmeticOrAssign, '|', TokenLogicalOr, TokenArithmeticOr); break;
case '{': GotToken = TokenLeftBrace; break;
case '}': GotToken = TokenRightBrace; break;
case '[': GotToken = TokenLeftSquareBracket; break;
case ']': GotToken = TokenRightSquareBracket; break;
case '!': GotToken = TokenUnaryNot; break;
case '^': GotToken = TokenArithmeticExor; break;
case '!': NEXTIS('=', TokenNotEqual, TokenUnaryNot); break;
case '^': NEXTIS('=', TokenArithmeticExorAssign, TokenArithmeticExor); break;
case '~': GotToken = TokenUnaryExor; break;
case ',': GotToken = TokenComma; break;
case '.': NEXTISEXACTLY3('.', '.', TokenEllipsis, TokenDot); break;
case '?': GotToken = TokenQuestionMark; break;
case ':': GotToken = TokenColon; break;
default: LexFail(Lexer, "illegal character '%c'", ThisChar); break;
}

12
picoc.h
View file

@ -33,15 +33,17 @@ enum LexToken
TokenNone, TokenEOF, TokenEndOfLine,
TokenIdentifier, TokenIntegerConstant, TokenFPConstant, TokenStringConstant, TokenCharacterConstant,
TokenOpenBracket, TokenCloseBracket,
TokenAssign, TokenPlus, TokenMinus, TokenAsterisk, TokenSlash,
TokenEquality, TokenLessThan, TokenGreaterThan, TokenLessEqual, TokenGreaterEqual,
TokenSemicolon, TokenComma, TokenDot, TokenColon, TokenEllipsis,
TokenAssign, TokenPlus, TokenMinus, TokenAsterisk, TokenSlash, TokenModulus,
TokenEquality, TokenNotEqual, TokenLessThan, TokenGreaterThan, TokenLessEqual, TokenGreaterEqual,
TokenSemicolon, TokenComma, TokenDot, TokenQuestionMark, TokenColon, TokenEllipsis,
TokenArrow, TokenAmpersand,
TokenLeftBrace, TokenRightBrace,
TokenLeftSquareBracket, TokenRightSquareBracket,
TokenLogicalAnd, TokenLogicalOr, TokenArithmeticOr, TokenArithmeticExor, TokenUnaryExor, TokenUnaryNot,
TokenAddAssign, TokenSubtractAssign,
TokenIncrement, TokenDecrement,
TokenAddAssign, TokenSubtractAssign, TokenMultiplyAssign, TokenDivideAssign, TokenModulusAssign,
TokenShiftLeft, TokenShiftRight,
TokenShiftLeftAssign, TokenShiftRightAssign, TokenArithmeticAndAssign, TokenArithmeticOrAssign, TokenArithmeticExorAssign,
TokenIncrement, TokenDecrement, TokenSizeof,
TokenIntType, TokenCharType, TokenFloatType, TokenDoubleType, TokenVoidType, TokenEnumType,
TokenLongType, TokenSignedType, TokenShortType, TokenStructType, TokenUnionType, TokenUnsignedType, TokenTypedef,
TokenContinue, TokenDo, TokenElse, TokenFor, TokenIf, TokenWhile, TokenBreak, TokenSwitch, TokenCase, TokenDefault, TokenReturn,