C23-compliant preprocessor

[ForNeVeR]

The section 6.10 Preprocessing directives of the C standard defines the requirements to the C preprocessor. We should fulfill them.

TODO

• [ ] #525
• [x] #538
• [ ] 6.10 Preprocessing directives
  • [ ] 6.10.1 Conditional inclusion
    • [ ] #532
    • [x] #534
  • [x] 6.10.2 Source file inclusion
  • [ ] 6.10.3 Binary resource inclusion
    • [ ] #174
  • [ ] 6.10.4 Macro replacement
    • [x] #429
    • [ ] #541
    • [ ] #542
    • [x] 6.10.4.1 Argument substitution
    • [x] 6.10.4.2 The # operator
    • [x] 6.10.4.3 The ## operator
    • [ ] 6.10.4.4 Rescanning and further replacement
    • [x] 6.10.4.5 Scope of macro definitions
  • [ ] 6.10.5 Line control
  • [ ] 6.10.6 Diagnostic directives
    • [x] #error
    • [ ] #warning
  • [x] 6.10.7 Pragma directive
  • [x] 6.10.8 Null directive
  • [ ] 6.10.9 Predefined macro names
    • [ ] 6.10.9.1 Mandatory macros
    • [ ] 6.10.9.2 Environment macros
    • [ ] 6.10.9.3 Conditional feature macros
  • [ ] 6.10.10 Pragma operator

Look for the number 77 in the code to find clues to implement this feature.

[kant2002]

Can you update this issue with implemented features

[ForNeVeR]

Updated the issue.