Wirth-AT-grammars/FreePascal-grammar/free_pascal.lst

Coco/R - Compiler-Compiler V1.53
Released by Pat Terry 17 September 2002
Source file: free_pascal.atg

Listing:

    1  (* Free Pascal ATG for Coco/R *)
    2  (* Adapted from the standard Pascal grammar *)
    3  
    4  (* Tags: FREEPASCAL, FP, FPC, DELPHI *)
    5  
    6  COMPILER FreePascal
    7  
    8  CHARACTERS
    9    eol = CHR(13) .
   10    letter = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" .
   11    digit = "0123456789" .
   12  IGNORE CHR(9) .. CHR(13)
   13  COMMENTS FROM "(*" TO "*)" NESTED
   14  
   15  TOKENS
   16    ident = letter { letter | digit } .
   17  
   18  PRODUCTIONS
   19  
   20    Program = "program" ident ";" Block "." .
   21  
   22    Block = [ UnitSection ] DeclPart Statements .
   23  
   24    UnitSection = "unit" ident ";" ImpSection ";" "end" ident "." .
   25  
   26    ImpSection = "implementation" [ ImpItems ] .
   27  
   28    ImpItems = ident { ";" ident } .
   29  
   30    DeclPart = [ ConstDecl ] [ TypeDecl ] [ VarDecl ] [ LabelDecl ] [ ProcDecl ].
   31  
   32    ConstDecl = "const" ConstSection .
   33  
   34    ConstSection = ConstDeclList { ";" ConstDeclList } .
   35  
   36    ConstDeclList = ident "=" Value { ";" ident "=" Value } .
   37  
   38    Value = number | ident | string .
   39  
   40    TypeDecl = "type" TypeSection .
   41  
   42    TypeSection = TypeDef { ";" TypeDef } .
   43  
   44    TypeDef = ident "=" Type .
   45  
   46    VarDecl = "var" VarSection .
   47  
   48    VarSection = VarDeclList { ";" VarDeclList } .
   49  
   50    VarDeclList = identlist ":" Type .
   51  
   52    identlist = ident { "," ident } .
   53  
   54    Type = SimpleType | StructType | PointerType | ArrayType | SetType | FileOfType | ClassType | InterfaceType .
   55  
   56    SimpleType = IntType | RealType | CharType | BoolType .
   57  
   58    IntType = "integer" .
   59    RealType = "real" .
   60    CharType = "char" .
   61    BoolType = "boolean" .
   62  
   63    StructType = ArrayType | RecordType | SetType | FileOfType | ClassType | InterfaceType .
   64  
   65    ArrayType = "array" "[" IndexList "]" "of" Type .
   66  
   67    IndexList = Type { "," Type } .
   68  
   69    RecordType = "record" FieldList "end" .
   70  
   71    FieldList = Field { ";" Field } .
   72  
   73    Field = FieldListPart ":" Type .
   74  
   75    FieldListPart = ident { "." ident } { "." ident } .
   76  
   77    SetType = "set" "of" Type .
   78  
   79    FileOfType = "file" of Type .
   80  
   81    ClassType = "class" [ Ident ] .
   82  
   83    InterfaceType = "interface" [ Ident ] .
   84  
   85    ProcDecl = "procedure" ident [ ParDeclList ] ";" { ConstDecl ; TypeDecl ; VarDecl ; ProcDecl } ";" .
*****                                                                 ^ invalid Factor
*****                                                                            ^ invalid Factor
*****                                                                                      ^ invalid Factor
   86  
   87    FuncDecl = "function" ident [ ParDeclList ] ":" Type { ConstDecl ; TypeDecl ; VarDecl ; ProcDecl } ";" .
*****                                                                     ^ invalid Factor
*****                                                                                ^ invalid Factor
*****                                                                                          ^ invalid Factor
   88  
   89    Statements = Statement { ";" Statement } .
   90  
   91    Statement = IfStmt
   92             | CaseStmt
   93             | WhileStmt
   94             | RepeatStmt
   95             | ForStmt
   96             | AssignedStmt
   97             | ProcCall
   98             | RetStmt
   99             | WithStmt
  100             | GotoStmt
  101             | WithInlineAsm ;
*****                             ^ invalid Factor
  102  
  103    IfStmt = "if" Expr "then" Stmts { "else" Stmts } .
*****           ^ invalid Factor
  104  
  105    CaseStmt = "case" Expr of { CaseItem ";" } "end" .
  106  
  107    CaseItem = Labels ":" Stmts .
  108  
  109    Labels = Label { "," Label } .
  110  
  111    Label = number .
  112  
  113    WhileStmt = "while" Expr "do" Stmts .
  114  
  115    RepeatStmt = "repeat" Stmts "until" Expr .
  116  
  117    ForStmt = "for" ident ":=" Expr "to" Expr "do" Stmts
  118             | "for" ident ":=" Expr "downto" Expr "do" Stmts .
  119  
  120    AssignedStmt = Var ":=" Expr .
  121  
  122    ProcCall = ident "(" [ ParamList ] ")" .
  123  
  124    ParamList = Param { "," Param } .
  125  
  126    Param = Expr .
  127  
  128    RetStmt = "return" [ Expr ] .
  129  
  130    WithStmt = "with" Var { "," Var } "do" Stmts .
  131  
  132    GotoStmt = "goto" ident .
  133  
  134    WithInlineAsm = "asm" AssemBlock "end" .
  135  
  136    AssemBlock = { AsmLine } .
  137  
  138    AsmLine = /[a-zA-Z0-9\s]+/ .
  139  
  140    Expr = SimpleExpr [ Relationship SimpleExpr ] .
  141  
  142    Relationship = "=" | "#" | "<" | ">" | "<=" | ">=" | "<>" .
  143  
  144    SimpleExpr = ["+" | "-"] Term { ("+" | "-") Term } .
  145  
  146    Term = Factor { ("*" | "/" | "div" | "mod" | "&") Factor } .
  147  
  148    Factor = ["+" | "-"] ["not"] Primary .
  149  
  150    Primary = number | ident | string | "(" Expr ")" | Primary "^" .
  151  
  152    number = digit { digit } .
  153  
  154    ident = letter { letter | digit } .
  155  
  156    string = "'" { noQuote1 | "''" } "'" .
  157  
  158    EndProgram = "." .

    8 errors