duncanamps / lacogen1 Goto Github PK

Need facility to include files, can be grouped in with the conditional compilation listed in issue #4.

For example:

{$INCLUDE "C:\temp\testing\myfile.inc"}
{$INCLUDE "C:\grammar\new_project\$(option).inc"}

LaCoGen uses characters and character ranges in the dictionary, e.g. 'A', '0..9', etc. and is a leftover from when 16 and 32 bit character sets were used. Now that 8 bit is the character set to use, remove the ranges for improved speed (UTF can still be used for more complex character spaces). This will mandate version 1.2 of the software as the file structures will change.

Add indent and outdent tokens to the grammar so that Python style constructs can be handled.

Add virtual terminals to the grammar.

Require better error handling on the lexer and parser, for example to show more context around the error or to define what should have been expected

Create software (additional program?) to take the .lacobj file and create code directly from it.

The XMLs are currently in one large file. Allow the option to split these out if required.

For version 1.1: In addition to the .lacobj file creation, add some code to create.pas files which contains tables, lexical analyser, parser, error handling, etc. If the original lac file is called asm6502.lac, the following files should be created:

• lac_asm6502_parser.pas
• lac_asm6502_code.pas (a skeleton program containing the code for reductions - only if it does not exist already)

lac_asm6502_parser.pas will contain the TLacAsm6502Parser object which can be instanced by the main program.

Allow conditional compilation using command line provided 'defines', for example:

lacogen asm6502.lac --compile --dump --define=DEBUG;FULL_VERSION
lacogen xa80.lac --compile --dump --define=PROCLIST:8080;FIRST_ROW:A

Within the software be able to act on these defines with conditional compilation:

{$IFDEF DEBUG}
  <codeline> : <expression> "," <expression>  # ActCodelineDebug
  {$DEFINE EXTRA_INFO}
{$ELSE}
  <codeline> : <expression> "," <expression>  # ActCodeline
{$ENDIF}

And the use of the content of defines with

T_OPCODE = MIXED("AND")
         | MIXED("BIT")
         | MIXED("CCF")
               :
         | MIXED("SRL")
         | MIXED("TST")
         | MIXED("XOR")
{$IF PROC="8080"}
         | MIXED("ACI")
         | MIXED("ADI")
         | MIXED("ANA")
{$ENDIF}

Need to implement the following:

• Command line capture of:
  • Variable definitions
  • Variable definitions with contents
• Language grammar additions for:
  • {$DEFINE}
  • {$ELSE}
  • {$ENDIF}
  • {$IF}
  • {$IFDEF}
  • {$IFNDEF}
  • { ... ${var} ... } to expand command line variable into text
  • Simple comparison operators (=, <, <=, >, >=, <>)
  • Boolean operators (not, and, or)
  • Grouping operator using ( ) e.g. (a and b) or c
  • String concatenation with +