Transpile procedures and statements

Rakefile

@@ -100,13 +100,15 @@ task :backport do
     source = File.read source_path
 
     target = source
-      .gsub(/^(var|type|const)/) { |match| match.upcase }
+      .gsub(/^(var|type|const|begin)/) { |match| match.upcase }
       .gsub(/^[[:alnum:]]* ?module/) { |match| match.upcase }
-      .gsub(/(record| pointer to )/) { |match| match.upcase }
+      .gsub(/\brecord\b/) { |match| match.upcase }
       .gsub(/proc(\(| )/, 'PROCEDURE\1')
-      .gsub(/([[:space:]]*)end;/, '\1END;')
+      .gsub(/([[:space:]]*)end(;?)$/, '\1END\2')
+      .gsub(/^([[:space:]]*)(while|return|if)\b/) { |match| match.upcase }
       .gsub(/^from ([[:alnum:]]+) import/, 'FROM \1 IMPORT')
       .gsub(/ \^([[:alnum:]])/, ' POINTER TO \1')
+      .gsub(/(then|do)$/) { |match| match.upcase }
 
     target_path = Pathname.new('boot/stage1/source') + source_path.basename
     File.write target_path, target

source/Lexer.elna

@@ -70,8 +70,8 @@ var
   Classification: ARRAY[1..128] OF TransitionClass;
   Transitions: ARRAY[0..15] OF ARRAY[0..21] OF Transition;
 
-PROCEDURE InitializeClassification();
+proc InitializeClassification();
-BEGIN
+begin
   Classification[1] := transitionClassEof; (* NUL *)
   Classification[2] := transitionClassInvalid; (* SOH *)
   Classification[3] := transitionClassInvalid; (* STX *)
@@ -202,195 +202,265 @@ BEGIN
   Classification[128] := transitionClassInvalid (* DEL *)
 END InitializeClassification;
 
-PROCEDURE CompareKeyword(Keyword: ARRAY OF CHAR; TokenStart: PLexerBuffer; TokenEnd: PLexerBuffer): BOOLEAN;
+proc CompareKeyword(Keyword: ARRAY OF CHAR; TokenStart: PLexerBuffer; TokenEnd: PLexerBuffer): BOOLEAN;
-VAR
+var
   Result: BOOLEAN;
   Index: CARDINAL;
-BEGIN
+begin
   Index := 0;
   Result := TRUE;
 
-  WHILE (Index < Length(Keyword)) AND (TokenStart <> TokenEnd) AND Result DO
+  while (Index < Length(Keyword)) AND (TokenStart <> TokenEnd) AND Result DO
     Result := (Keyword[Index] = TokenStart^) OR (Lower(Keyword[Index]) = TokenStart^);
     INC(TokenStart);
     INC(Index)
-  END;
+  end;
-  RETURN (Index = Length(Keyword)) AND (TokenStart = TokenEnd) AND Result
+  Result := (Index = Length(Keyword)) AND (TokenStart = TokenEnd) AND Result;
+  return Result
 END CompareKeyword;
 
 (* Reached the end of file. *)
-PROCEDURE TransitionActionEof(ALexer: PLexer; AToken: PLexerToken);
+proc TransitionActionEof(ALexer: PLexer; AToken: PLexerToken);
-BEGIN
+begin
   AToken^.Kind := lexerKindEof
 END TransitionActionEof;
 
 (* Add the character to the token currently read and advance to the next character. *)
-PROCEDURE TransitionActionAccumulate(ALexer: PLexer; AToken: PLexerToken);
+proc TransitionActionAccumulate(ALexer: PLexer; AToken: PLexerToken);
-BEGIN
+begin
   INC(ALexer^.Current)
 END TransitionActionAccumulate;
 
 (* The current character is not a part of the token. Finish the token already
  * read. Don't advance to the next character. *)
-PROCEDURE TransitionActionFinalize(ALexer: PLexer; AToken: PLexerToken);
+proc TransitionActionFinalize(ALexer: PLexer; AToken: PLexerToken);
-BEGIN
+begin
-  IF ALexer^.Start^ = ':' THEN
+  if ALexer^.Start^ = ':' then
     AToken^.Kind := lexerKindColon
-  ELSIF ALexer^.Start^ = '>' THEN
+  end;
+  if ALexer^.Start^ = '>' then
     AToken^.Kind := lexerKindGreaterThan
-  ELSIF ALexer^.Start^ = '<' THEN
+  end;
+  if ALexer^.Start^ = '<' then
     AToken^.Kind := lexerKindLessThan
-  ELSIF ALexer^.Start^ = '(' THEN
+  end;
+  if ALexer^.Start^ = '(' then
     AToken^.Kind := lexerKindLeftParen
-  ELSIF ALexer^.Start^ = '-' THEN
+  end;
+  if ALexer^.Start^ = '-' then
     AToken^.Kind := lexerKindLeftParen
-  ELSIF ALexer^.Start^ = '.' THEN
+  end;
+  if ALexer^.Start^ = '.' then
     AToken^.Kind := lexerKindDot
-  END
+  end
 END TransitionActionFinalize;
 
 (* An action for tokens containing multiple characters. *)
-PROCEDURE TransitionActionComposite(ALexer: PLexer; AToken: PLexerToken);
+proc TransitionActionComposite(ALexer: PLexer; AToken: PLexerToken);
-BEGIN
+begin
-  IF ALexer^.Start^ = '<' THEN
+  if ALexer^.Start^ = '<' then
-    IF ALexer^.Current^ = '>' THEN
+    if ALexer^.Current^ = '>' then
       AToken^.Kind := lexerKindNotEqual
-    ELSIF ALexer^.Current^ = '=' THEN
+    end;
+    if ALexer^.Current^ = '=' then
       AToken^.Kind := lexerKindLessEqual
-    END
+    end
-  ELSIF (ALexer^.Start^ = '>') AND (ALexer^.Current^ = '=') THEN
+  end;
+  if (ALexer^.Start^ = '>') AND (ALexer^.Current^ = '=') then
     AToken^.Kind := lexerKindGreaterEqual
-  ELSIF (ALexer^.Start^ = '.') AND (ALexer^.Current^ = '.') THEN
+  end;
+  if (ALexer^.Start^ = '.') AND (ALexer^.Current^ = '.') then
     AToken^.Kind := lexerKindRange
-  ELSIF (ALexer^.Start^ = ':') AND (ALexer^.Current^ = '=') THEN
+  end;
+  if (ALexer^.Start^ = ':') AND (ALexer^.Current^ = '=') then
     AToken^.Kind := lexerKindAssignment
-  END;
+  end;
   INC(ALexer^.Current)
 END TransitionActionComposite;
 
 (* Skip a space. *)
-PROCEDURE TransitionActionSkip(ALexer: PLexer; AToken: PLexerToken);
+proc TransitionActionSkip(ALexer: PLexer; AToken: PLexerToken);
-BEGIN
+begin
   INC(ALexer^.Current);
   INC(ALexer^.Start)
 END TransitionActionSkip;
 
-(* 0x04. Delimited string action. *)
+(* Delimited string action. *)
-PROCEDURE TransitionActionDelimited(ALexer: PLexer; AToken: PLexerToken);
+proc TransitionActionDelimited(ALexer: PLexer; AToken: PLexerToken);
-BEGIN
+begin
-  IF ALexer^.Start^ = '(' THEN
+  if ALexer^.Start^ = '(' then
     AToken^.Kind := lexerKindComment
-  ELSIF ALexer^.Start^ = '"' THEN
+  end;
+  if ALexer^.Start^ = '"' then
     AToken^.Kind := lexerKindCharacter
-  ELSIF ALexer^.Start^ = "'" THEN
+  end;
+  if ALexer^.Start^ = "'" then
     AToken^.Kind := lexerKindString
-  END;
+  end;
   INC(ALexer^.Current)
 END TransitionActionDelimited;
 
 (* Finalize keyword or identifier. *)
-PROCEDURE TransitionActionKeyId(ALexer: PLexer; AToken: PLexerToken);
+proc TransitionActionKeyId(ALexer: PLexer; AToken: PLexerToken);
-BEGIN
+begin
-  IF CompareKeyword('PROGRAM', ALexer^.Start, ALexer^.Current) THEN
+  AToken^.Kind := lexerKindIdentifier;
+
+  if CompareKeyword('PROGRAM', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindProgram
-  ELSIF CompareKeyword('IMPORT', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('IMPORT', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindImport
-  ELSIF CompareKeyword('CONST', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('CONST', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindConst
-  ELSIF CompareKeyword('VAR', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('VAR', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindVar
-  ELSIF CompareKeyword('IF', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('IF', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindIf
-  ELSIF CompareKeyword('THEN', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('THEN', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindThen
-  ELSIF CompareKeyword('ELSIF', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('ELSIF', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindElsif
-  ELSIF CompareKeyword('ELSE', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('ELSE', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindElse
-  ELSIF CompareKeyword('WHILE', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('WHILE', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindWhile
-  ELSIF CompareKeyword('DO', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('DO', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindDo
-  ELSIF CompareKeyword('PROCEDURE', ALexer^.Start, ALexer^.Current) OR CompareKeyword('proc', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('proc', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindProc
-  ELSIF CompareKeyword('BEGIN', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('BEGIN', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindBegin
-  ELSIF CompareKeyword('END', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('END', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindEnd
-  ELSIF CompareKeyword('TYPE', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('TYPE', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindType
-  ELSIF CompareKeyword('RECORD', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('RECORD', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindRecord
-  ELSIF CompareKeyword('UNION', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('UNION', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindUnion
-  ELSIF CompareKeyword('NIL', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('NIL', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindNull
-  ELSIF CompareKeyword('AND', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('AND', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindAnd
-  ELSIF CompareKeyword('OR', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('OR', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindOr
-  ELSIF CompareKeyword('RETURN', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('RETURN', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindReturn
-  ELSIF CompareKeyword('DEFINITION', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('DEFINITION', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindDefinition
-  ELSIF CompareKeyword('TO', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('TO', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindTo
-  ELSIF CompareKeyword('CASE', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('CASE', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindCase
-  ELSIF CompareKeyword('OF', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('OF', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindOf
-  ELSIF CompareKeyword('FROM', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('FROM', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindFrom
-  ELSIF CompareKeyword('MODULE', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('MODULE', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindModule
-  ELSIF CompareKeyword('IMPLEMENTATION', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('IMPLEMENTATION', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindImplementation
-  ELSIF CompareKeyword('POINTER', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('POINTER', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindPointer
-  ELSIF CompareKeyword('ARRAY', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('ARRAY', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindArray
-  ELSIF CompareKeyword('TRUE', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('TRUE', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindBoolean;
     AToken^.booleanKind := TRUE
-  ELSIF CompareKeyword('FALSE', ALexer^.Start, ALexer^.Current) THEN
+  end;
+  if CompareKeyword('FALSE', ALexer^.Start, ALexer^.Current) then
     AToken^.Kind := lexerKindBoolean;
     AToken^.booleanKind := FALSE
-  ELSE
+  end
-    AToken^.Kind := lexerKindIdentifier
-  END;
 END TransitionActionKeyId;
 
 (* Action for tokens containing only one character. The character cannot be
  * followed by other characters forming a composite token. *)
-PROCEDURE TransitionActionSingle(ALexer: PLexer; AToken: PLexerToken);
+proc TransitionActionSingle(ALexer: PLexer; AToken: PLexerToken);
-BEGIN
+begin
-  CASE ALexer^.Current^ OF
+  if ALexer^.Current^ = '&' then
-    '&': AToken^.Kind := lexerKindAnd |
+    AToken^.Kind := lexerKindAnd
-    ';': AToken^.Kind := lexerKindSemicolon |
+  end;
-    ',': AToken^.Kind := lexerKindComma |
+  if ALexer^.Current^ = ';' then
-    ')': AToken^.Kind := lexerKindRightParen |
+    AToken^.Kind := lexerKindSemicolon
-    '[': AToken^.Kind := lexerKindLeftSquare |
+  end;
-    ']': AToken^.Kind := lexerKindRightSquare |
+  if ALexer^.Current^ = ',' then
-    '^': AToken^.Kind := lexerKindHat |
+    AToken^.Kind := lexerKindComma
-    '=': AToken^.Kind := lexerKindEqual |
+  end;
-    '+': AToken^.Kind := lexerKindPlus |
+  if ALexer^.Current^ = ',' then
-    '/': AToken^.Kind := lexerKindDivision |
+    AToken^.Kind := lexerKindComma
-    '%': AToken^.Kind := lexerKindRemainder |
+  end;
-    '@': AToken^.Kind := lexerKindAt |
+  if ALexer^.Current^ = ')' then
-    '|': AToken^.Kind := lexerKindPipe
+    AToken^.Kind := lexerKindRightParen
-  END;
+  end;
+  if ALexer^.Current^ = '[' then
+    AToken^.Kind := lexerKindLeftSquare
+  end;
+  if ALexer^.Current^ = ']' then
+    AToken^.Kind := lexerKindRightSquare
+  end;
+  if ALexer^.Current^ = '^' then
+    AToken^.Kind := lexerKindHat
+  end;
+  if ALexer^.Current^ = '=' then
+    AToken^.Kind := lexerKindEqual
+  end;
+  if ALexer^.Current^ = '+' then
+    AToken^.Kind := lexerKindPlus
+  end;
+  if ALexer^.Current^ = '/' then
+    AToken^.Kind := lexerKindDivision
+  end;
+  if ALexer^.Current^ = '%' then
+    AToken^.Kind := lexerKindRemainder
+  end;
+  if ALexer^.Current^ = '@' then
+    AToken^.Kind := lexerKindAt
+  end;
+  if ALexer^.Current^ = '|' then
+    AToken^.Kind := lexerKindPipe
+  end;
   INC(ALexer^.Current)
 END TransitionActionSingle;
 
 (* Handle an integer literal. *)
-PROCEDURE TransitionActionInteger(ALexer: PLexer; AToken: PLexerToken);
+proc TransitionActionInteger(ALexer: PLexer; AToken: PLexerToken);
-BEGIN
+begin
   AToken^.Kind := lexerKindInteger
 END TransitionActionInteger;
 
-PROCEDURE SetDefaultTransition(CurrentState: TransitionState; DefaultAction: TransitionAction; NextState: TransitionState);
+proc SetDefaultTransition(CurrentState: TransitionState; DefaultAction: TransitionAction; NextState: TransitionState);
-VAR DefaultTransition: Transition;
+var
-BEGIN
+  DefaultTransition: Transition;
+begin
   DefaultTransition.Action := DefaultAction;
   DefaultTransition.NextState := NextState;
 
@@ -415,7 +485,7 @@ BEGIN
   Transitions[ORD(CurrentState)][ORD(transitionClassDoubleQuote)] := DefaultTransition;
   Transitions[ORD(CurrentState)][ORD(transitionClassGreater)] := DefaultTransition;
   Transitions[ORD(CurrentState)][ORD(transitionClassLess)] := DefaultTransition;
-  Transitions[ORD(CurrentState)][ORD(transitionClassOther)] := DefaultTransition;
+  Transitions[ORD(CurrentState)][ORD(transitionClassOther)] := DefaultTransition
 END SetDefaultTransition;
 
 (*
@@ -434,8 +504,8 @@ END SetDefaultTransition;
  *   For the meaning of actions see labels in the lex_next function, which
  *   handles each action.
  *)
-PROCEDURE InitializeTransitions();
+proc InitializeTransitions();
-BEGIN
+begin
   (* Start state. *)
   Transitions[ORD(transitionStateStart)][ORD(transitionClassInvalid)].Action := NIL;
   Transitions[ORD(transitionStateStart)][ORD(transitionClassInvalid)].NextState := transitionStateEnd;
@@ -672,8 +742,8 @@ BEGIN
   Transitions[ORD(transitionStateDecimalSuffix)][ORD(transitionClassX)].NextState := transitionStateEnd
 END InitializeTransitions;
 
-PROCEDURE LexerInitialize(ALexer: PLexer; Input: File);
+proc LexerInitialize(ALexer: PLexer; Input: File);
-BEGIN
+begin
   ALexer^.Input := Input;
   ALexer^.Length := 0;
 
@@ -682,41 +752,44 @@ BEGIN
   ALexer^.Size := ChunkSize
 END LexerInitialize;
 
-PROCEDURE LexerCurrent(ALexer: PLexer): LexerToken;
+proc LexerCurrent(ALexer: PLexer): LexerToken;
-VAR
+var
   CurrentClass: TransitionClass;
   CurrentState: TransitionState;
   CurrentTransition: Transition;
   Result: LexerToken;
-BEGIN
+begin
   ALexer^.Current := ALexer^.Start;
   CurrentState := transitionStateStart;
 
-  WHILE CurrentState <> transitionStateEnd DO
+  while CurrentState <> transitionStateEnd DO
     CurrentClass := Classification[ORD(ALexer^.Current^) + 1];
 
     CurrentTransition := Transitions[ORD(CurrentState)][ORD(CurrentClass)];
-    IF CurrentTransition.Action <> NIL THEN
+    if CurrentTransition.Action <> NIL then
       CurrentTransition.Action(ALexer, ADR(Result))
-    END;
+    end;
     CurrentState := CurrentTransition.NextState
-  END;
+  end;
-  RETURN Result
+  return Result
 END LexerCurrent;
 
-PROCEDURE LexerLex(ALexer: PLexer): LexerToken;
+proc LexerLex(ALexer: PLexer): LexerToken;
-BEGIN
+var
-  IF ALexer^.Length = 0 THEN
+  Result: LexerToken;
+begin
+  if ALexer^.Length = 0 then
     ALexer^.Length := ReadNBytes(ALexer^.Input, ChunkSize, ALexer^.Buffer);
     ALexer^.Current := ALexer^.Buffer
-  END;
+  end;
   ALexer^.Start := ALexer^.Current;
 
-  RETURN LexerCurrent(ALexer)
+  Result := LexerCurrent(ALexer);
+  return Result
 END LexerLex;
 
-PROCEDURE LexerDestroy(ALexer: PLexer);
+proc LexerDestroy(ALexer: PLexer);
-BEGIN
+begin
   DEALLOCATE(ALexer^.Buffer, ALexer^.Size)
 END LexerDestroy;
 

source/Transpiler.elna

@@ -13,31 +13,31 @@ type
   end;
 
 (* Calls LexerLex() but skips the comments. *)
-PROCEDURE TranspilerLex(ALexer: PLexer): LexerToken;
+proc TranspilerLex(ALexer: PLexer): LexerToken;
-VAR
+var
   Result: LexerToken;
-BEGIN
+begin
   Result := LexerLex(ALexer);
 
-  WHILE Result.Kind = lexerKindComment DO
+  while Result.Kind = lexerKindComment do
     Result := LexerLex(ALexer)
-  END;
+  end;
 
-  RETURN Result
+  return Result
 END TranspilerLex;
 
 (* Write a semicolon followed by a newline. *)
-PROCEDURE WriteSemicolon();
+proc WriteSemicolon();
-BEGIN
+begin
   WriteString(';');
   WriteLn()
 END WriteSemicolon;
 
-PROCEDURE TranspileImport(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspileImport(AContext: PTranspilerContext; ALexer: PLexer);
-VAR
+var
   Token: LexerToken;
   WrittenBytes: CARDINAL;
-BEGIN
+begin
   WriteString('FROM ');
   Token := TranspilerLex(ALexer);
 
@@ -50,34 +50,34 @@ BEGIN
   WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
 
   Token := TranspilerLex(ALexer);
-  WHILE Token.Kind <> lexerKindSemicolon DO
+  while Token.Kind <> lexerKindSemicolon do
     WriteString(', ');
     Token := TranspilerLex(ALexer);
     WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
     Token := TranspilerLex(ALexer)
-  END;
+  end;
   WriteSemicolon();
   Token := TranspilerLex(ALexer)
 END TranspileImport;
 
-PROCEDURE TranspileImportPart(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspileImportPart(AContext: PTranspilerContext; ALexer: PLexer);
-VAR
+var
   Token: LexerToken;
-BEGIN
+begin
   Token := LexerCurrent(ALexer);
 
-  WHILE Token.Kind = lexerKindFrom DO
+  while Token.Kind = lexerKindFrom do
     TranspileImport(AContext, ALexer);
     Token := LexerCurrent(ALexer)
-  END;
+  end;
   WriteLn()
 END TranspileImportPart;
 
-PROCEDURE TranspileConstant(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspileConstant(AContext: PTranspilerContext; ALexer: PLexer);
-VAR
+var
   Token: LexerToken;
   WrittenBytes: CARDINAL;
-BEGIN
+begin
   WriteString('  ');
   Token := LexerCurrent(ALexer);
   WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
@@ -92,39 +92,42 @@ BEGIN
   WriteSemicolon()
 END TranspileConstant;
 
-PROCEDURE TranspileConstantPart(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspileConstantPart(AContext: PTranspilerContext; ALexer: PLexer): BOOLEAN;
-VAR
+var
   Token: LexerToken;
-BEGIN
+  Result: BOOLEAN;
+begin
   Token := LexerCurrent(ALexer);
+  Result := Token.Kind = lexerKindConst;
 
-  IF Token.Kind = lexerKindConst THEN
+  if Result then
     WriteString('CONST');
     WriteLn();
     Token := TranspilerLex(ALexer);
 
-    WHILE Token.Kind = lexerKindIdentifier DO
+    while Token.Kind = lexerKindIdentifier do
       TranspileConstant(AContext, ALexer);
       Token := TranspilerLex(ALexer)
-    END;
+    end
-    WriteLn()
+  end;
-  END
+  return Result
 END TranspileConstantPart;
 
-PROCEDURE TranspileModule(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspileModule(AContext: PTranspilerContext; ALexer: PLexer);
-VAR
+var
   Token: LexerToken;
   WrittenBytes: CARDINAL;
-BEGIN
+begin
   Token := TranspilerLex(ALexer);
 
-  IF Token.Kind = lexerKindDefinition THEN
+  if Token.Kind = lexerKindDefinition then
     WriteString('DEFINITION ');
-    Token := TranspilerLex(ALexer);
+    Token := TranspilerLex(ALexer)
-  ELSIF Token.Kind = lexerKindImplementation THEN
+  end;
+  if Token.Kind = lexerKindImplementation then
     WriteString('IMPLEMENTATION ');
     Token := TranspilerLex(ALexer)
-  END;
+  end;
   WriteString('MODULE ');
 
   (* Write the module name and end the line with a semicolon and newline. *)
@@ -138,28 +141,32 @@ BEGIN
   (* Write the module body. *)
   Token := TranspilerLex(ALexer);
   TranspileImportPart(AContext, ALexer);
-  TranspileConstantPart(AContext, ALexer);
+  if TranspileConstantPart(AContext, ALexer) then
+    WriteLn()
+  end;
   TranspileTypePart(AContext, ALexer);
-  TranspileVariablePart(AContext, ALexer);
+  if TranspileVariablePart(AContext, ALexer) then
+    WriteLn()
+  end;
   TranspileProcedurePart(AContext, ALexer);
 
   Token := LexerCurrent(ALexer);
-  WHILE Token.Kind <> lexerKindEof DO
+  while Token.Kind <> lexerKindEof do
     WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
     WriteLn();
 
     Token := TranspilerLex(ALexer)
-  END
+  end
 END TranspileModule;
 
-PROCEDURE TranspileTypeFields(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspileTypeFields(AContext: PTranspilerContext; ALexer: PLexer);
-VAR
+var
   Token: LexerToken;
   WrittenBytes: CARDINAL;
-BEGIN
+begin
   Token := TranspilerLex(ALexer);
 
-  WHILE Token.Kind <> lexerKindEnd DO
+  while Token.Kind <> lexerKindEnd do
     WriteString('    ');
     WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
     Token := TranspilerLex(ALexer);
@@ -167,47 +174,46 @@ BEGIN
     TranspileTypeExpression(AContext, ALexer);
     Token := TranspilerLex(ALexer);
 
-    IF Token.Kind = lexerKindSemicolon THEN
+    if Token.Kind = lexerKindSemicolon then
       Token := TranspilerLex(ALexer);
-      WriteSemicolon()
+      Write(';')
-    ELSE
+    end;
     WriteLn()
-    END
+  end
-  END
 END TranspileTypeFields;
 
-PROCEDURE TranspileRecordType(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspileRecordType(AContext: PTranspilerContext; ALexer: PLexer);
-VAR
+var
   Token: LexerToken;
-BEGIN
+begin
   WriteString('RECORD');
   WriteLn();
   TranspileTypeFields(AContext, ALexer);
   WriteString('  END')
 END TranspileRecordType;
 
-PROCEDURE TranspilePointerType(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspilePointerType(AContext: PTranspilerContext; ALexer: PLexer);
-VAR
+var
   Token: LexerToken;
   WrittenBytes: CARDINAL;
-BEGIN
+begin
   Token := LexerCurrent(ALexer);
   WriteString('POINTER TO ');
-  IF Token.Kind = lexerKindPointer THEN
+  if Token.Kind = lexerKindPointer then
     Token := TranspilerLex(ALexer)
-  END;
+  end;
   TranspileTypeExpression(AContext, ALexer)
 END TranspilePointerType;
 
-PROCEDURE TranspileArrayType(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspileArrayType(AContext: PTranspilerContext; ALexer: PLexer);
-VAR
+var
   Token: LexerToken;
   WrittenBytes: CARDINAL;
-BEGIN
+begin
   WriteString('ARRAY');
   Token := TranspilerLex(ALexer);
 
-  IF Token.Kind <> lexerKindOf THEN
+  if Token.Kind <> lexerKindOf then
     Write('[');
     Token := TranspilerLex(ALexer);
     WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
@@ -218,16 +224,16 @@ BEGIN
     Token := TranspilerLex(ALexer);
     Write(']');
     Token := TranspilerLex(ALexer)
-  END;
+  end;
   WriteString(' OF ');
   TranspileTypeExpression(AContext, ALexer)
 END TranspileArrayType;
 
-PROCEDURE TranspileEnumerationType(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspileEnumerationType(AContext: PTranspilerContext; ALexer: PLexer);
-VAR
+var
   Token: LexerToken;
   WrittenBytes: CARDINAL;
-BEGIN
+begin
   WriteString('(');
   WriteLn();
   WriteString('    ');
@@ -237,7 +243,7 @@ BEGIN
 
   Token := TranspilerLex(ALexer);
 
-  WHILE Token.Kind = lexerKindComma DO
+  while Token.Kind = lexerKindComma do
     Write(',');
     WriteLn();
     WriteString('    ');
@@ -245,64 +251,69 @@ BEGIN
     WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
 
     Token := TranspilerLex(ALexer)
-  END;
+  end;
   WriteLn();
   WriteString('  )')
 END TranspileEnumerationType;
 
-PROCEDURE TranspileUnionType(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspileUnionType(AContext: PTranspilerContext; ALexer: PLexer);
-VAR
+var
   Token: LexerToken;
 END TranspileUnionType;
 
-PROCEDURE TranspileProcedureType(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspileProcedureType(AContext: PTranspilerContext; ALexer: PLexer);
-VAR
+var
   Token: LexerToken;
   WrittenBytes: CARDINAL;
-BEGIN
+begin
   Token := TranspilerLex(ALexer);
   WriteString('PROCEDURE(');
 
   Token := TranspilerLex(ALexer);
 
-  WHILE Token.Kind <> lexerKindRightParen DO
+  while Token.Kind <> lexerKindRightParen do
     WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
 
     Token := TranspilerLex(ALexer);
-    IF Token.Kind = lexerKindComma THEN
+    if Token.Kind = lexerKindComma then
       Token := TranspilerLex(ALexer);
       WriteString(', ')
-    END
+    end
-  END;
+  end;
   Write(')')
 END TranspileProcedureType;
 
-PROCEDURE TranspileTypeExpression(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspileTypeExpression(AContext: PTranspilerContext; ALexer: PLexer);
-VAR
+var
   Token: LexerToken;
   WrittenBytes: CARDINAL;
-BEGIN
+begin
   Token := TranspilerLex(ALexer);
-  IF Token.Kind = lexerKindRecord THEN
+  if Token.Kind = lexerKindRecord then
     TranspileRecordType(AContext, ALexer)
-  ELSIF Token.Kind = lexerKindLeftParen THEN
+  end;
+  if Token.Kind = lexerKindLeftParen then
     TranspileEnumerationType(AContext, ALexer)
-  ELSIF Token.Kind = lexerKindArray THEN
+  end;
+  if Token.Kind = lexerKindArray then
     TranspileArrayType(AContext, ALexer)
-  ELSIF (Token.Kind = lexerKindPointer) OR (Token.Kind = lexerKindHat) THEN
+  end;
+  if (Token.Kind = lexerKindPointer) OR (Token.Kind = lexerKindHat) then
     TranspilePointerType(AContext, ALexer)
-  ELSIF Token.Kind = lexerKindProc THEN
+  end;
+  if Token.Kind = lexerKindProc then
     TranspileProcedureType(AContext, ALexer)
-  ELSE
+  end;
+  if Token.Kind = lexerKindIdentifier then
     WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start)
-  END
+  end
 END TranspileTypeExpression;
 
-PROCEDURE TranspileTypeDeclaration(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspileTypeDeclaration(AContext: PTranspilerContext; ALexer: PLexer);
-VAR
+var
   Token: LexerToken;
   WrittenBytes: CARDINAL;
-BEGIN
+begin
   WriteString('  ');
   Token := LexerCurrent(ALexer);
   WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
@@ -314,30 +325,30 @@ BEGIN
   WriteSemicolon();
 END TranspileTypeDeclaration;
 
-PROCEDURE TranspileTypePart(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspileTypePart(AContext: PTranspilerContext; ALexer: PLexer);
-VAR
+var
   Token: LexerToken;
-BEGIN
+begin
   Token := LexerCurrent(ALexer);
 
-  IF Token.Kind = lexerKindType THEN
+  if Token.Kind = lexerKindType then
     WriteString('TYPE');
     WriteLn();
     Token := TranspilerLex(ALexer);
 
-    WHILE Token.Kind = lexerKindIdentifier DO
+    while Token.Kind = lexerKindIdentifier do
       TranspileTypeDeclaration(AContext, ALexer);
       Token := TranspilerLex(ALexer)
-    END;
+    end;
     WriteLn()
-  END
+  end
 END TranspileTypePart;
 
-PROCEDURE TranspileVariableDeclaration(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspileVariableDeclaration(AContext: PTranspilerContext; ALexer: PLexer);
-VAR
+var
   Token: LexerToken;
   WrittenBytes: CARDINAL;
-BEGIN
+begin
   WriteString('  ');
   Token := LexerCurrent(ALexer);
   WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
@@ -349,30 +360,32 @@ BEGIN
   WriteSemicolon()
 END TranspileVariableDeclaration;
 
-PROCEDURE TranspileVariablePart(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspileVariablePart(AContext: PTranspilerContext; ALexer: PLexer): BOOLEAN;
-VAR
+var
   Token: LexerToken;
-BEGIN
+  Result: BOOLEAN;
+begin
   Token := LexerCurrent(ALexer);
+  Result := Token.Kind = lexerKindVar;
 
-  IF Token.Kind = lexerKindVar THEN
+  if Result then
     WriteString('VAR');
     WriteLn();
     Token := TranspilerLex(ALexer);
 
-    WHILE Token.Kind = lexerKindIdentifier DO
+    while Token.Kind = lexerKindIdentifier do
       TranspileVariableDeclaration(AContext, ALexer);
       Token := TranspilerLex(ALexer)
-    END;
+    end
-    WriteLn()
+  end;
-  END
+  return Result
 END TranspileVariablePart;
 
-PROCEDURE TranspileProcedureDeclaration(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspileProcedureHeading(AContext: PTranspilerContext; ALexer: PLexer);
-VAR
+var
   Token: LexerToken;
   WrittenBytes: CARDINAL;
-BEGIN
+begin
   WriteString('PROCEDURE ');
 
   Token := TranspilerLex(ALexer);
@@ -382,52 +395,235 @@ BEGIN
   Write('(');
 
   Token := TranspilerLex(ALexer);
-  WHILE Token.Kind <> lexerKindRightParen DO
+  while Token.Kind <> lexerKindRightParen do
     WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
 
     Token := TranspilerLex(ALexer);
     WriteString(': ');
 
-    Token := TranspilerLex(ALexer);
+    TranspileTypeExpression(AContext, ALexer);
-    WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
 
     Token := TranspilerLex(ALexer);
-    IF Token.Kind = lexerKindSemicolon THEN
+    if Token.Kind = lexerKindSemicolon then
       WriteString('; ');
       Token := TranspilerLex(ALexer)
-    END
+    end
-  END;
+  end;
   WriteString(')');
   Token := TranspilerLex(ALexer);
 
   (* Check for the return type and write it. *)
-  IF Token.Kind = lexerKindColon THEN
+  if Token.Kind = lexerKindColon then
     WriteString(': ');
     Token := TranspilerLex(ALexer);
     WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
     Token := TranspilerLex(ALexer)
-  END;
+  end;
   Token := TranspilerLex(ALexer);
   WriteSemicolon()
-END TranspileProcedureDeclaration;
+END TranspileProcedureHeading;
 
-PROCEDURE TranspileProcedurePart(AContext: PTranspilerContext; ALexer: PLexer);
+proc TranspileIfStatement(AContext: PTranspilerContext; ALexer: PLexer);
-VAR
+var
   Token: LexerToken;
-BEGIN
+  WrittenBytes: CARDINAL;
+begin
+  WriteString('  IF ');
+  Token := TranspilerLex(ALexer);
+
+  while Token.Kind <> lexerKindThen do
+    WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
+    Write(' ');
+    Token := TranspilerLex(ALexer)
+  end;
+  WriteString('THEN');
+  WriteLn();
+  TranspileStatements(AContext, ALexer);
+  WriteString('  END');
+  Token := TranspilerLex(ALexer)
+END TranspileIfStatement;
+
+proc TranspileWhileStatement(AContext: PTranspilerContext; ALexer: PLexer);
+var
+  Token: LexerToken;
+  WrittenBytes: CARDINAL;
+begin
+  WriteString('  WHILE ');
+  Token := TranspilerLex(ALexer);
+
+  while Token.Kind <> lexerKindDo do
+    WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
+    Write(' ');
+    Token := TranspilerLex(ALexer)
+  end;
+  WriteString('DO');
+  WriteLn();
+  TranspileStatements(AContext, ALexer);
+  WriteString('  END');
+  Token := TranspilerLex(ALexer)
+END TranspileWhileStatement;
+
+proc TranspileAssignmentStatement(AContext: PTranspilerContext; ALexer: PLexer);
+var
+  Token: LexerToken;
+  WrittenBytes: CARDINAL;
+begin
+  WriteString(' := ');
+  Token := TranspilerLex(ALexer);
+
+  while (Token.Kind <> lexerKindSemicolon) AND (Token.Kind <> lexerKindEnd) do
+    WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
+    Write(' ');
+    Token := TranspilerLex(ALexer)
+  end
+END TranspileAssignmentStatement;
+
+proc TranspileCallStatement(AContext: PTranspilerContext; ALexer: PLexer);
+var
+  Token: LexerToken;
+  WrittenBytes: CARDINAL;
+begin
+  WriteString('(');
+  Token := TranspilerLex(ALexer);
+
+  while (Token.Kind <> lexerKindSemicolon) AND (Token.Kind <> lexerKindEnd) do
+    WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
+    Token := TranspilerLex(ALexer)
+  end
+END TranspileCallStatement;
+
+proc TranspileReturnStatement(AContext: PTranspilerContext; ALexer: PLexer);
+var
+  Token: LexerToken;
+  WrittenBytes: CARDINAL;
+begin
+  WriteString('  RETURN ');
+  Token := TranspilerLex(ALexer);
+  WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
+  Token := TranspilerLex(ALexer)
+END TranspileReturnStatement;
+
+proc TranspileStatement(AContext: PTranspilerContext; ALexer: PLexer);
+var
+  Token: LexerToken;
+  WrittenBytes: CARDINAL;
+begin
+  Token := TranspilerLex(ALexer);
+
+  if Token.Kind = lexerKindIf then
+    TranspileIfStatement(AContext, ALexer)
+  end;
+  if Token.Kind = lexerKindWhile then
+    TranspileWhileStatement(AContext, ALexer)
+  end;
+  if Token.Kind = lexerKindReturn then
+    TranspileReturnStatement(AContext, ALexer)
+  end;
+  if Token.Kind = lexerKindIdentifier then
+    WriteString('  ');
+    WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
+    Token := TranspilerLex(ALexer);
+
+    while Token.Kind = lexerKindLeftSquare do
+      Write('[');
+      Token := TranspilerLex(ALexer);
+      while Token.Kind <> lexerKindRightSquare do
+        WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
+        Token := TranspilerLex(ALexer)
+      end;
+      Write(']');
+      Token := TranspilerLex(ALexer);
+    end;
+    if Token.Kind = lexerKindHat then
+      Write('^');
+      Token := TranspilerLex(ALexer)
+    end;
+    if Token.Kind = lexerKindDot then
+      Write('.');
+      Token := TranspilerLex(ALexer);
+      WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
+      Token := TranspilerLex(ALexer);
+    end;
+    if Token.Kind = lexerKindHat then
+      Write('^');
+      Token := TranspilerLex(ALexer)
+    end;
+
+    if Token.Kind = lexerKindAssignment then
+      TranspileAssignmentStatement(AContext, ALexer)
+    end;
+    if Token.Kind = lexerKindLeftParen then
+      TranspileCallStatement(AContext, ALexer)
+    end
+  end
+END TranspileStatement;
+
+proc TranspileStatements(AContext: PTranspilerContext; ALexer: PLexer);
+var
+  Token: LexerToken;
+begin
   Token := LexerCurrent(ALexer);
 
-  IF Token.Kind = lexerKindProc THEN
+  while Token.Kind <> lexerKindEnd do
-    TranspileProcedureDeclaration(AContext, ALexer)
+    TranspileStatement(AContext, ALexer);
-  END
+    Token := LexerCurrent(ALexer);
+
+    if Token.Kind = lexerKindSemicolon then
+      Write(';')
+    end;
+    WriteLn()
+  end
+END TranspileStatements;
+
+proc TranspileStatementPart(AContext: PTranspilerContext; ALexer: PLexer);
+var
+  Token: LexerToken;
+begin
+  Token := LexerCurrent(ALexer);
+  if Token.Kind = lexerKindBegin then
+    WriteString('BEGIN');
+    WriteLn();
+    TranspileStatements(AContext, ALexer)
+  end
+END TranspileStatementPart;
+
+proc TranspileProcedureDeclaration(AContext: PTranspilerContext; ALexer: PLexer);
+var
+  Token: LexerToken;
+  SeenPart: BOOLEAN;
+  WrittenBytes: CARDINAL;
+begin
+  TranspileProcedureHeading(AContext, ALexer);
+  SeenPart := TranspileConstantPart(AContext, ALexer);
+  SeenPart := TranspileVariablePart(AContext, ALexer);
+  TranspileStatementPart(AContext, ALexer);
+  WriteString('END ');
+  Token := TranspilerLex(ALexer);
+  WrittenBytes := WriteNBytes(StdOut, ADDRESS(ALexer^.Current - ALexer^.Start), ALexer^.Start);
+  Token := TranspilerLex(ALexer);
+  WriteSemicolon();
+  Token := TranspilerLex(ALexer)
+END TranspileProcedureDeclaration;
+
+proc TranspileProcedurePart(AContext: PTranspilerContext; ALexer: PLexer);
+var
+  Token: LexerToken;
+begin
+  Token := LexerCurrent(ALexer);
+
+  while Token.Kind = lexerKindProc do
+    TranspileProcedureDeclaration(AContext, ALexer);
+    Token := LexerCurrent(ALexer);
+    WriteLn()
+  end
 END TranspileProcedurePart;
 
-PROCEDURE Transpile(ALexer: PLexer);
+proc Transpile(ALexer: PLexer);
-VAR
+var
   Token: LexerToken;
   WrittenBytes: CARDINAL;
   Context: TranspilerContext;
-BEGIN
+begin
   TranspileModule(ADR(Context), ALexer)
 END Transpile;