diff options
Diffstat (limited to 'llvm/docs/TableGen')
| -rw-r--r-- | llvm/docs/TableGen/LangRef.rst | 49 |
1 files changed, 1 insertions, 48 deletions
diff --git a/llvm/docs/TableGen/LangRef.rst b/llvm/docs/TableGen/LangRef.rst index 2efee12ec9d..439d646034a 100644 --- a/llvm/docs/TableGen/LangRef.rst +++ b/llvm/docs/TableGen/LangRef.rst @@ -33,7 +33,7 @@ Lexical Analysis ================ TableGen supports BCPL (``// ...``) and nestable C-style (``/* ... */``) -comments. TableGen also provides simple `Preprocessing Support`_. +comments. The following is a listing of the basic punctuation tokens:: @@ -448,50 +448,3 @@ applied at the end of parsing the base classes of a record. BaseMultiClassList: `MultiClassID` ("," `MultiClassID`)* MultiClassID: `TokIdentifier` MultiClassObject: `Def` | `Defm` | `Let` | `Foreach` - -Preprocessing Support -===================== - -TableGen's embedded preprocessor is only intended for conditional compilation. -It supports the following directives: - -.. productionlist:: - LineBegin: ^ - LineEnd: "\n" | "\r" | EOF - WhiteSpace: " " | "\t" - CStyleComment: "/*" (.* - "*/") "*/" - BCPLComment: "//" (.* - `LineEnd`) `LineEnd` - WhiteSpaceOrCStyleComment: `WhiteSpace` | `CStyleComment` - WhiteSpaceOrAnyComment: `WhiteSpace` | `CStyleComment` | `BCPLComment` - MacroName: `ualpha` (`ualpha` | "0"..."9")* - PrepDefine: `LineBegin` (`WhiteSpaceOrCStyleComment`)* - : "#define" (`WhiteSpace`)+ `MacroName` - : (`WhiteSpaceOrAnyComment`)* `LineEnd` - PrepIfdef: `LineBegin` (`WhiteSpaceOrCStyleComment`)* - : "#ifdef" (`WhiteSpace`)+ `MacroName` - : (`WhiteSpaceOrAnyComment`)* `LineEnd` - PrepElse: `LineBegin` (`WhiteSpaceOrCStyleComment`)* - : "#else" (`WhiteSpaceOrAnyComment`)* `LineEnd` - PrepEndif: `LineBegin` (`WhiteSpaceOrCStyleComment`)* - : "#endif" (`WhiteSpaceOrAnyComment`)* `LineEnd` - PrepRegContentException: `PredIfdef` | `PredElse` | `PredEndif` | EOF - PrepRegion: .* - `PrepRegContentException` - :| `PrepIfDef` - : (`PrepRegion`)* - : [`PrepElse`] - : (`PrepRegion`)* - : `PrepEndif` - -:token:`PrepRegion` may occur anywhere in a TD file, as long as it matches -the grammar specification. - -:token:`PrepDefine` allows defining a :token:`MacroName` so that any following -:token:`PrepIfdef` - :token:`PrepElse` preprocessing region part and -:token:`PrepIfdef` - :token:`PrepEndif` preprocessing region -are enabled for TableGen tokens parsing. - -A preprocessing region, starting (i.e. having its :token:`PrepIfdef`) in a file, -must end (i.e. have its :token:`PrepEndif`) in the same file. - -A :token:`MacroName` may be defined externally by using ``{ -D<NAME> }`` -option of TableGen. |
