Lexik der Sprache C0

Schlüsselwörter

`KW_BOOLEAN`	`"bool"`
`KW_DO`	`"do"`
`KW_ELSE`	`"else"`
`KW_FLOAT`	`"float"`
`KW_FOR`	`"for"`
`KW_IF`	`"if"`
`KW_INT`	`"int"`
`KW_PRINTF`	`"printf"`
`KW_RETURN`	`"return"`
`KW_VOID`	`"void"`
`KW_WHILE`	`"while"`

Operatoren

`PLUS`	`"+"`
`MINUS`	`"-"`
`ASTERISK`	`"*"`
`SLASH`	`"/"`
`ASSIGN`	`"="`
`EQ`	`"=="`
`NEQ`	`"!="`
`LSS`	`"<"`
`GRT`	`">"`
`LEQ`	`"<="`
`GEQ`	`">="`
`AND`	`"&&"`
`OR`	`"\|\|"`

Sonstige Token

`COMMA`	`","`
`SEMICOLON`	`";"`
`LPAREN`	`"("`
`RPAREN`	`")"`
`LBRACE`	`"{"`
`RBRACE`	`"}"`

Termvariablen

`CONST_INT`	`{INTEGER}`
`CONST_FLOAT`	`{FLOAT} ( [eE] ([-+])? {INTEGER} )?`
	`\| {INTEGER} [eE] ([-+])? {INTEGER}`
`CONST_BOOLEAN`	`"true" \| "false"`
`ID`	`({LETTER})+ ({DIGIT} \| {LETTER})*`

"Pseudotoken" (nur zur Konstruktion anderer Token)

`DIGIT`	`[0-9]`
`INTEGER`	`{DIGIT}+`
`FLOAT`	`{INTEGER} "." {INTEGER} \| "." {INTEGER}`
`LETTER`	`[a-zA-Z]`

Kommentare

C-Kommentare	`"/" <comment> "/"`
C++-Kommentare	`"//" <comment> "\n"`