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Add A command line parsing procedure

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This commit is contained in:
Eugen Wissner
2025-05-31 11:27:23 +02:00
parent a93d12eb50
commit 72e545225b
11 changed files with 386 additions and 245 deletions
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3
source/CommandLine.def Normal file
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@ -0,0 +1,3 @@
DEFINITION MODULE CommandLine;
END CommandLine.

3
source/CommandLine.mod Normal file
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@ -0,0 +1,3 @@
MODULE CommandLine;
END CommandLine.

15
source/CommandLineInterface.def Normal file
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@ -0,0 +1,15 @@
DEFINITION MODULE CommandLineInterface;
FROM Common IMPORT ShortString;
TYPE
CommandLine = RECORD
input: ShortString;
lex: BOOLEAN;
parse: BOOLEAN
END;
PCommandLine = POINTER TO CommandLine;
PROCEDURE parse_command_line(): PCommandLine;
END CommandLineInterface.

74
source/CommandLineInterface.mod Normal file
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IMPLEMENTATION MODULE CommandLineInterface;
FROM SYSTEM IMPORT ADR, TSIZE;
FROM Args IMPORT GetArg, Narg;
FROM FIO IMPORT WriteString, WriteChar, WriteLine, StdErr;
FROM Storage IMPORT ALLOCATE;
FROM Strings IMPORT CompareStr, Length;
FROM MemUtils IMPORT MemZero;
FROM Common IMPORT ShortString;
PROCEDURE parse_command_line(): PCommandLine;
VAR
parameter: ShortString;
i: CARDINAL;
result: PCommandLine;
parsed: BOOLEAN;
BEGIN
i := 1;
ALLOCATE(result, TSIZE(CommandLine));
result^.lex := FALSE;
result^.parse := FALSE;
MemZero(ADR(result^.input), 256);
WHILE (i < Narg()) AND (result <> NIL) DO
parsed := GetArg(parameter, i);
parsed := FALSE;
IF CompareStr(parameter, '--lex') = 0 THEN
parsed := TRUE;
result^.lex := TRUE
END;
IF CompareStr(parameter, '--parse') = 0 THEN
parsed := TRUE;
result^.parse := TRUE
END;
IF parameter[0] <> '-' THEN
parsed := TRUE;
IF Length(result^.input) > 0 THEN
WriteString(StdErr, 'Fatal error: only one source file can be compiled at once. First given "');
WriteString(StdErr, result^.input);
WriteString(StdErr, '", then "');
WriteString(StdErr, parameter);
WriteString(StdErr, '".');
WriteLine(StdErr);
result := NIL
END;
IF result <> NIL THEN
result^.input := parameter
END
END;
IF parsed = FALSE THEN
WriteString(StdErr, 'Fatal error: unknown command line options: ');
WriteString(StdErr, parameter);
WriteChar(StdErr, '.');
WriteLine(StdErr);
result := NIL
END;
i := i + 1
END;
IF (result <> NIL) AND (Length(result^.input) = 0) THEN
WriteString(StdErr, 'Fatal error: no input files.');
WriteLine(StdErr);
result := NIL
END;
RETURN result
END parse_command_line;
END CommandLineInterface.

6
source/Common.def Normal file
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DEFINITION MODULE Common;
TYPE
ShortString = ARRAY[0..255] OF CHAR;
END Common.

3
source/Common.mod Normal file
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IMPLEMENTATION MODULE Common;
END Common.

42
source/Compiler.mod
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@ -1,18 +1,50 @@
MODULE Compiler;
FROM FIO IMPORT StdIn;
FROM FIO IMPORT Close, IsNoError, File, OpenToRead, StdErr, WriteLine, WriteString;
FROM SYSTEM IMPORT ADR;
FROM M2RTS IMPORT HALT, ExitOnHalt;
FROM Lexer IMPORT Lexer, lexer_destroy, lexer_initialize;
FROM Transpiler IMPORT transpile;
FROM CommandLineInterface IMPORT PCommandLine, parse_command_line;
VAR
command_line: PCommandLine;
PROCEDURE compile_from_stream();
VAR
lexer: Lexer;
source_input: File;
BEGIN
lexer_initialize(ADR(lexer), StdIn);
source_input := OpenToRead(command_line^.input);
transpile(ADR(lexer));
IF IsNoError(source_input) = FALSE THEN
WriteString(StdErr, 'Fatal error: failed to read the input file "');
WriteString(StdErr, command_line^.input);
WriteString(StdErr, '".');
WriteLine(StdErr);
lexer_destroy(ADR(lexer))
ExitOnHalt(2)
END;
IF IsNoError(source_input) THEN
lexer_initialize(ADR(lexer), source_input);
transpile(ADR(lexer));
lexer_destroy(ADR(lexer));
Close(source_input)
END
END compile_from_stream;
BEGIN
ExitOnHalt(0);
command_line := parse_command_line();
IF command_line <> NIL THEN
compile_from_stream()
END;
IF command_line = NIL THEN
ExitOnHalt(1)
END;
HALT()
END Compiler.

3
source/Parser.def Normal file
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DEFINITION MODULE Parser;
END Parser.

3
source/Parser.mod Normal file
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@ -0,0 +1,3 @@
MODULE Parser;
END Parser.

12
source/Transpiler.def
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@ -1,6 +1,16 @@
DEFINITION MODULE Transpiler;
FROM Lexer IMPORT PLexer;
FROM FIO IMPORT File;
FROM Lexer IMPORT PLexer, Lexer;
TYPE
TranspilerContext = RECORD
indentation: CARDINAL;
output: File;
lexer: PLexer
END;
PTranspilerContext = POINTER TO TranspilerContext;
PROCEDURE transpile(ALexer: PLexer);

467
source/Transpiler.mod
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@ -1,17 +1,11 @@
IMPLEMENTATION MODULE Transpiler;
FROM FIO IMPORT WriteNBytes, StdOut;
FROM FIO IMPORT WriteNBytes, StdOut, WriteLine, WriteChar;
FROM SYSTEM IMPORT ADR, ADDRESS;
FROM Terminal IMPORT Write, WriteLn, WriteString;
FROM Lexer IMPORT Lexer, LexerToken, lexer_current, lexer_lex, LexerKind;
TYPE
PTranspilerContext = POINTER TO TranspilerContext;
TranspilerContext = RECORD
Indentation: CARDINAL
END;
(* Calls lexer_lex() but skips the comments. *)
PROCEDURE transpiler_lex(lexer: PLexer): LexerToken;
VAR
@ -26,394 +20,383 @@ BEGIN
RETURN result
END transpiler_lex;
(* Write a semicolon followed by a newline. *)
PROCEDURE write_semicolon();
PROCEDURE write_semicolon(output: File);
BEGIN
WriteString(';');
WriteLn()
WriteChar(output, ';');
WriteLine(output)
END write_semicolon;
PROCEDURE transpile_import(context: PTranspilerContext; lexer: PLexer);
PROCEDURE write_current(lexer: PLexer);
VAR
token: LexerToken;
written_bytes: CARDINAL;
BEGIN
WriteString('FROM ');
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := transpiler_lex(lexer);
WriteString(' IMPORT ');
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := transpiler_lex(lexer);
WHILE token.kind <> lexerKindSemicolon DO
WriteString(', ');
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := transpiler_lex(lexer)
END;
write_semicolon();
token := transpiler_lex(lexer)
END transpile_import;
PROCEDURE transpile_import_part(context: PTranspilerContext; lexer: PLexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start)
END write_current;
PROCEDURE transpile_import(context: PTranspilerContext);
VAR
token: LexerToken;
BEGIN
token := lexer_current(lexer);
WriteString('FROM ');
token := transpiler_lex(context^.lexer);
write_current(context^.lexer);
token := transpiler_lex(context^.lexer);
WriteString(' IMPORT ');
token := transpiler_lex(context^.lexer);
write_current(context^.lexer);
token := transpiler_lex(context^.lexer);
WHILE token.kind <> lexerKindSemicolon DO
WriteString(', ');
token := transpiler_lex(context^.lexer);
write_current(context^.lexer);
token := transpiler_lex(context^.lexer)
END;
write_semicolon(context^.output);
token := transpiler_lex(context^.lexer)
END transpile_import;
PROCEDURE transpile_import_part(context: PTranspilerContext);
VAR
token: LexerToken;
BEGIN
token := lexer_current(context^.lexer);
WHILE token.kind = lexerKindFrom DO
transpile_import(context, lexer);
token := lexer_current(lexer)
transpile_import(context);
token := lexer_current(context^.lexer)
END;
WriteLn()
END transpile_import_part;
PROCEDURE transpile_constant(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_constant(context: PTranspilerContext);
VAR
token: LexerToken;
written_bytes: CARDINAL;
BEGIN
WriteString(' ');
token := lexer_current(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := lexer_current(context^.lexer);
write_current(context^.lexer);
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
WriteString(' = ');
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := transpiler_lex(context^.lexer);
write_current(context^.lexer);
token := transpiler_lex(lexer);
write_semicolon()
token := transpiler_lex(context^.lexer);
write_semicolon(context^.output)
END transpile_constant;
PROCEDURE transpile_constant_part(context: PTranspilerContext; lexer: PLexer): BOOLEAN;
PROCEDURE transpile_constant_part(context: PTranspilerContext): BOOLEAN;
VAR
token: LexerToken;
result: BOOLEAN;
BEGIN
token := lexer_current(lexer);
token := lexer_current(context^.lexer);
result := token.kind = lexerKindConst;
IF result THEN
WriteString('CONST');
WriteLn();
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
WHILE token.kind = lexerKindIdentifier DO
transpile_constant(context, lexer);
token := transpiler_lex(lexer)
transpile_constant(context);
token := transpiler_lex(context^.lexer)
END
END;
RETURN result
END transpile_constant_part;
PROCEDURE transpile_module(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_module(context: PTranspilerContext);
VAR
token: LexerToken;
written_bytes: CARDINAL;
BEGIN
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
IF token.kind = lexerKindDefinition THEN
WriteString('DEFINITION ');
token := transpiler_lex(lexer)
token := transpiler_lex(context^.lexer)
END;
IF token.kind = lexerKindImplementation THEN
WriteString('IMPLEMENTATION ');
token := transpiler_lex(lexer)
token := transpiler_lex(context^.lexer)
END;
WriteString('MODULE ');
(* Write the module name and end the line with a semicolon and newline. *)
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := transpiler_lex(context^.lexer);
write_current(context^.lexer);
token := transpiler_lex(lexer);
write_semicolon();
token := transpiler_lex(context^.lexer);
write_semicolon(context^.output);
WriteLn();
(* Write the module body. *)
token := transpiler_lex(lexer);
transpile_import_part(context, lexer);
IF transpile_constant_part(context, lexer) THEN
token := transpiler_lex(context^.lexer);
transpile_import_part(context);
IF transpile_constant_part(context) THEN
WriteLn()
END;
transpile_type_part(context, lexer);
IF transpile_variable_part(context, lexer) THEN
transpile_type_part(context);
IF transpile_variable_part(context) THEN
WriteLn()
END;
transpile_procedure_part(context, lexer);
transpile_statement_part(context, lexer);
transpile_procedure_part(context);
transpile_statement_part(context);
WriteString('END ');
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := transpiler_lex(context^.lexer);
write_current(context^.lexer);
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
Write('.');
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
WriteLn()
END transpile_module;
PROCEDURE transpile_type_fields(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_type_fields(context: PTranspilerContext);
VAR
token: LexerToken;
written_bytes: CARDINAL;
BEGIN
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
WHILE token.kind <> lexerKindEnd DO
WriteString(' ');
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := transpiler_lex(lexer);
write_current(context^.lexer);
token := transpiler_lex(context^.lexer);
WriteString(': ');
transpile_type_expression(context, lexer);
token := transpiler_lex(lexer);
transpile_type_expression(context);
token := transpiler_lex(context^.lexer);
IF token.kind = lexerKindSemicolon THEN
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
Write(';')
END;
WriteLn()
END
END transpile_type_fields;
PROCEDURE transpile_record_type(context: PTranspilerContext; lexer: PLexer);
VAR
token: LexerToken;
PROCEDURE transpile_record_type(context: PTranspilerContext);
BEGIN
WriteString('RECORD');
WriteLn();
transpile_type_fields(context, lexer);
transpile_type_fields(context);
WriteString(' END')
END transpile_record_type;
PROCEDURE transpile_pointer_type(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_pointer_type(context: PTranspilerContext);
VAR
token: LexerToken;
written_bytes: CARDINAL;
BEGIN
token := lexer_current(lexer);
token := lexer_current(context^.lexer);
WriteString('POINTER TO ');
IF token.kind = lexerKindPointer THEN
token := transpiler_lex(lexer)
token := transpiler_lex(context^.lexer)
END;
transpile_type_expression(context, lexer)
transpile_type_expression(context)
END transpile_pointer_type;
PROCEDURE transpile_array_type(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_array_type(context: PTranspilerContext);
VAR
token: LexerToken;
written_bytes: CARDINAL;
BEGIN
WriteString('ARRAY');
token := lexer_current(lexer);
token := lexer_current(context^.lexer);
IF token.kind = lexerKindArray THEN
token := transpiler_lex(lexer)
token := transpiler_lex(context^.lexer)
END;
IF token.kind <> lexerKindOf THEN
WriteString('[1..');
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
write_current(context^.lexer);
token := transpiler_lex(context^.lexer);
Write(']')
END;
WriteString(' OF ');
transpile_type_expression(context, lexer)
transpile_type_expression(context)
END transpile_array_type;
PROCEDURE transpile_enumeration_type(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_enumeration_type(context: PTranspilerContext);
VAR
token: LexerToken;
written_bytes: CARDINAL;
BEGIN
WriteString('(');
WriteLn();
WriteString(' ');
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := transpiler_lex(context^.lexer);
write_current(context^.lexer);
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
WHILE token.kind = lexerKindComma DO
Write(',');
WriteLn();
WriteString(' ');
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := transpiler_lex(context^.lexer);
write_current(context^.lexer);
token := transpiler_lex(lexer)
token := transpiler_lex(context^.lexer)
END;
WriteLn();
WriteString(' )')
END transpile_enumeration_type;
PROCEDURE transpile_union_type(context: PTranspilerContext; lexer: PLexer);
VAR
token: LexerToken;
PROCEDURE transpile_union_type(context: PTranspilerContext);
END transpile_union_type;
PROCEDURE transpile_procedure_type(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_procedure_type(context: PTranspilerContext);
VAR
token: LexerToken;
written_bytes: CARDINAL;
BEGIN
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
WriteString('PROCEDURE(');
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
WHILE token.kind <> lexerKindRightParen DO
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
write_current(context^.lexer);
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
IF token.kind = lexerKindComma THEN
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
WriteString(', ')
END
END;
Write(')')
END transpile_procedure_type;
PROCEDURE transpile_type_expression(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_type_expression(context: PTranspilerContext);
VAR
token: LexerToken;
written_bytes: CARDINAL;
BEGIN
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
IF token.kind = lexerKindRecord THEN
transpile_record_type(context, lexer)
transpile_record_type(context)
END;
IF token.kind = lexerKindLeftParen THEN
transpile_enumeration_type(context, lexer)
transpile_enumeration_type(context)
END;
IF (token.kind = lexerKindArray) OR (token.kind = lexerKindLeftSquare) THEN
transpile_array_type(context, lexer)
transpile_array_type(context)
END;
IF token.kind = lexerKindHat THEN
transpile_pointer_type(context, lexer)
transpile_pointer_type(context)
END;
IF token.kind = lexerKindProc THEN
transpile_procedure_type(context, lexer)
transpile_procedure_type(context)
END;
IF token.kind = lexerKindIdentifier THEN
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start)
write_current(context^.lexer)
END
END transpile_type_expression;
PROCEDURE transpile_type_declaration(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_type_declaration(context: PTranspilerContext);
VAR
token: LexerToken;
written_bytes: CARDINAL;
BEGIN
WriteString(' ');
token := lexer_current(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := lexer_current(context^.lexer);
write_current(context^.lexer);
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
WriteString(' = ');
transpile_type_expression(context, lexer);
token := transpiler_lex(lexer);
write_semicolon();
transpile_type_expression(context);
token := transpiler_lex(context^.lexer);
write_semicolon(context^.output);
END transpile_type_declaration;
PROCEDURE transpile_type_part(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_type_part(context: PTranspilerContext);
VAR
token: LexerToken;
BEGIN
token := lexer_current(lexer);
token := lexer_current(context^.lexer);
IF token.kind = lexerKindType THEN
WriteString('TYPE');
WriteLn();
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
WHILE token.kind = lexerKindIdentifier DO
transpile_type_declaration(context, lexer);
token := transpiler_lex(lexer)
transpile_type_declaration(context);
token := transpiler_lex(context^.lexer)
END;
WriteLn()
END
END transpile_type_part;
PROCEDURE transpile_variable_declaration(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_variable_declaration(context: PTranspilerContext);
VAR
token: LexerToken;
written_bytes: CARDINAL;
BEGIN
WriteString(' ');
token := lexer_current(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := lexer_current(context^.lexer);
write_current(context^.lexer);
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
WriteString(': ');
transpile_type_expression(context, lexer);
token := transpiler_lex(lexer);
write_semicolon()
transpile_type_expression(context);
token := transpiler_lex(context^.lexer);
write_semicolon(context^.output)
END transpile_variable_declaration;
PROCEDURE transpile_variable_part(context: PTranspilerContext; lexer: PLexer): BOOLEAN;
PROCEDURE transpile_variable_part(context: PTranspilerContext): BOOLEAN;
VAR
token: LexerToken;
result: BOOLEAN;
BEGIN
token := lexer_current(lexer);
token := lexer_current(context^.lexer);
result := token.kind = lexerKindVar;
IF result THEN
WriteString('VAR');
WriteLn();
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
WHILE token.kind = lexerKindIdentifier DO
transpile_variable_declaration(context, lexer);
token := transpiler_lex(lexer)
transpile_variable_declaration(context);
token := transpiler_lex(context^.lexer)
END
END;
RETURN result
END transpile_variable_part;
PROCEDURE transpile_procedure_heading(context: PTranspilerContext; lexer: PLexer): LexerToken;
PROCEDURE transpile_procedure_heading(context: PTranspilerContext): LexerToken;
VAR
token: LexerToken;
result: LexerToken;
written_bytes: CARDINAL;
BEGIN
WriteString('PROCEDURE ');
result := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
result := transpiler_lex(context^.lexer);
write_current(context^.lexer);
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
Write('(');
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
WHILE token.kind <> lexerKindRightParen DO
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
write_current(context^.lexer);
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
WriteString(': ');
transpile_type_expression(context, lexer);
transpile_type_expression(context);
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
IF (token.kind = lexerKindSemicolon) OR (token.kind = lexerKindComma) THEN
WriteString('; ');
token := transpiler_lex(lexer)
token := transpiler_lex(context^.lexer)
END
END;
WriteString(')');
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
(* Check for the return type and write it. *)
IF token.kind = lexerKindArrow THEN
WriteString(': ');
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := transpiler_lex(lexer)
token := transpiler_lex(context^.lexer);
write_current(context^.lexer);
token := transpiler_lex(context^.lexer)
END;
token := transpiler_lex(lexer);
write_semicolon();
token := transpiler_lex(context^.lexer);
write_semicolon(context^.output);
RETURN result
END transpile_procedure_heading;
PROCEDURE transpile_expression(context: PTranspilerContext; lexer: PLexer; trailing_token: LexerKind);
PROCEDURE transpile_expression(context: PTranspilerContext; trailing_token: LexerKind);
VAR
token: LexerToken;
written_bytes: CARDINAL;
BEGIN
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
WHILE (token.kind <> trailing_token) AND (token.kind <> lexerKindEnd) DO
written_bytes := 0;
@ -421,6 +404,14 @@ BEGIN
WriteString('NIL ');
written_bytes := 1
END;
IF (token.kind = lexerKindBoolean) AND token.booleanKind THEN
WriteString('TRUE ');
written_bytes := 1
END;
IF (token.kind = lexerKindBoolean) AND (~token.booleanKind) THEN
WriteString('FALSE ');
written_bytes := 1
END;
IF token.kind = lexerKindOr THEN
WriteString('OR ');
written_bytes := 1
@ -434,149 +425,143 @@ BEGIN
written_bytes := 1
END;
IF written_bytes = 0 THEN
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
write_current(context^.lexer);
Write(' ')
END;
token := transpiler_lex(lexer)
token := transpiler_lex(context^.lexer)
END
END transpile_expression;
PROCEDURE transpile_if_statement(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_if_statement(context: PTranspilerContext);
VAR
token: LexerToken;
written_bytes: CARDINAL;
BEGIN
WriteString(' IF ');
transpile_expression(context, lexer, lexerKindThen);
transpile_expression(context, lexerKindThen);
WriteString('THEN');
WriteLn();
transpile_statements(context, lexer);
transpile_statements(context);
WriteString(' END');
token := transpiler_lex(lexer)
token := transpiler_lex(context^.lexer)
END transpile_if_statement;
PROCEDURE transpile_while_statement(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_while_statement(context: PTranspilerContext);
VAR
token: LexerToken;
written_bytes: CARDINAL;
BEGIN
WriteString(' WHILE ');
transpile_expression(context, lexer, lexerKindDo);
transpile_expression(context, lexerKindDo);
WriteString('DO');
WriteLn();
transpile_statements(context, lexer);
transpile_statements(context);
WriteString(' END');
token := transpiler_lex(lexer)
token := transpiler_lex(context^.lexer)
END transpile_while_statement;
PROCEDURE transpile_assignment_statement(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_assignment_statement(context: PTranspilerContext);
BEGIN
WriteString(' := ');
transpile_expression(context, lexer, lexerKindSemicolon);
transpile_expression(context, lexerKindSemicolon);
END transpile_assignment_statement;
PROCEDURE transpile_call_statement(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_call_statement(context: PTranspilerContext);
VAR
token: LexerToken;
written_bytes: CARDINAL;
BEGIN
WriteString('(');
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
WHILE (token.kind <> lexerKindSemicolon) AND (token.kind <> lexerKindEnd) DO
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := transpiler_lex(lexer)
write_current(context^.lexer);
token := transpiler_lex(context^.lexer)
END
END transpile_call_statement;
PROCEDURE transpile_designator_expression(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_designator_expression(context: PTranspilerContext);
VAR
token: LexerToken;
written_bytes: CARDINAL;
BEGIN
WriteString(' ');
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := transpiler_lex(lexer);
write_current(context^.lexer);
token := transpiler_lex(context^.lexer);
WHILE token.kind = lexerKindLeftSquare DO
Write('[');
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
WHILE token.kind <> lexerKindRightSquare DO
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := transpiler_lex(lexer)
write_current(context^.lexer);
token := transpiler_lex(context^.lexer)
END;
Write(']');
token := transpiler_lex(lexer)
token := transpiler_lex(context^.lexer)
END;
IF token.kind = lexerKindHat THEN
Write('^');
token := transpiler_lex(lexer)
token := transpiler_lex(context^.lexer)
END;
IF token.kind = lexerKindDot THEN
Write('.');
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := transpiler_lex(lexer)
token := transpiler_lex(context^.lexer);
write_current(context^.lexer);
token := transpiler_lex(context^.lexer)
END;
IF token.kind = lexerKindHat THEN
Write('^');
token := transpiler_lex(lexer)
token := transpiler_lex(context^.lexer)
END;
WHILE token.kind = lexerKindLeftSquare DO
Write('[');
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
WHILE token.kind <> lexerKindRightSquare DO
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := transpiler_lex(lexer)
write_current(context^.lexer);
token := transpiler_lex(context^.lexer)
END;
Write(']');
token := transpiler_lex(lexer)
token := transpiler_lex(context^.lexer)
END
END transpile_designator_expression;
PROCEDURE transpile_return_statement(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_return_statement(context: PTranspilerContext);
VAR
token: LexerToken;
written_bytes: CARDINAL;
BEGIN
WriteString(' RETURN ');
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
token := transpiler_lex(lexer)
token := transpiler_lex(context^.lexer);
write_current(context^.lexer);
token := transpiler_lex(context^.lexer)
END transpile_return_statement;
PROCEDURE transpile_statement(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_statement(context: PTranspilerContext);
VAR
token: LexerToken;
written_bytes: CARDINAL;
BEGIN
token := transpiler_lex(lexer);
token := transpiler_lex(context^.lexer);
IF token.kind = lexerKindIf THEN
transpile_if_statement(context, lexer)
transpile_if_statement(context)
END;
IF token.kind = lexerKindWhile THEN
transpile_while_statement(context, lexer)
transpile_while_statement(context)
END;
IF token.kind = lexerKindReturn THEN
transpile_return_statement(context, lexer)
transpile_return_statement(context)
END;
IF token.kind = lexerKindIdentifier THEN
transpile_designator_expression(context, lexer);
token := lexer_current(lexer);
transpile_designator_expression(context);
token := lexer_current(context^.lexer);
IF token.kind = lexerKindAssignment THEN
transpile_assignment_statement(context, lexer)
transpile_assignment_statement(context)
END;
IF token.kind = lexerKindLeftParen THEN
transpile_call_statement(context, lexer)
transpile_call_statement(context)
END
END
END transpile_statement;
PROCEDURE transpile_statements(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_statements(context: PTranspilerContext);
VAR
token: LexerToken;
BEGIN
token := lexer_current(lexer);
token := lexer_current(context^.lexer);
WHILE token.kind <> lexerKindEnd DO
transpile_statement(context, lexer);
token := lexer_current(lexer);
transpile_statement(context);
token := lexer_current(context^.lexer);
IF token.kind = lexerKindSemicolon THEN
Write(';')
@ -584,44 +569,44 @@ BEGIN
WriteLn()
END
END transpile_statements;
PROCEDURE transpile_statement_part(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_statement_part(context: PTranspilerContext);
VAR
token: LexerToken;
BEGIN
token := lexer_current(lexer);
token := lexer_current(context^.lexer);
IF token.kind = lexerKindBegin THEN
WriteString('BEGIN');
WriteLn();
transpile_statements(context, lexer)
transpile_statements(context)
END
END transpile_statement_part;
PROCEDURE transpile_procedure_declaration(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_procedure_declaration(context: PTranspilerContext);
VAR
token: LexerToken;
seen_part: BOOLEAN;
written_bytes: CARDINAL;
BEGIN
token := transpile_procedure_heading(context, lexer);
seen_part := transpile_constant_part(context, lexer);
seen_part := transpile_variable_part(context, lexer);
transpile_statement_part(context, lexer);
token := transpile_procedure_heading(context);
seen_part := transpile_constant_part(context);
seen_part := transpile_variable_part(context);
transpile_statement_part(context);
WriteString('END ');
written_bytes := WriteNBytes(StdOut, ORD(token.identifierKind[1]), ADR(token.identifierKind[2]));
token := transpiler_lex(lexer);
write_semicolon();
token := transpiler_lex(lexer)
token := transpiler_lex(context^.lexer);
write_semicolon(context^.output);
token := transpiler_lex(context^.lexer)
END transpile_procedure_declaration;
PROCEDURE transpile_procedure_part(context: PTranspilerContext; lexer: PLexer);
PROCEDURE transpile_procedure_part(context: PTranspilerContext);
VAR
token: LexerToken;
BEGIN
token := lexer_current(lexer);
token := lexer_current(context^.lexer);
WHILE token.kind = lexerKindProc DO
transpile_procedure_declaration(context, lexer);
token := lexer_current(lexer);
transpile_procedure_declaration(context);
token := lexer_current(context^.lexer);
WriteLn()
END
END transpile_procedure_part;
@ -631,6 +616,10 @@ VAR
written_bytes: CARDINAL;
context: TranspilerContext;
BEGIN
transpile_module(ADR(context), lexer)
context.indentation := 0;
context.output := StdOut;
context.lexer := lexer;
transpile_module(ADR(context))
END transpile;
END Transpiler.