Difference between revisions of "Syntax checking/Parser"
(→‎EIFFEL_PARSER)
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* inherits from EIFFEL_PARSER_SKELETON (where the features parse, parse_string, make_with_factory are implemented)
 
* inherits from EIFFEL_PARSER_SKELETON (where the features parse, parse_string, make_with_factory are implemented)
 
* make_with_factory (a_factory: AST_FACTORY): give argument of type AST_NULL_FACTORY (inherits from AST_FACTORY)
 
* make_with_factory (a_factory: AST_FACTORY): give argument of type AST_NULL_FACTORY (inherits from AST_FACTORY)
−
* parse (a_file: KL_BINARY_INPUT_FILE) and parse_from_string (a_string: STRING): Both save the results in match_list: LEAF_AS_LIST.
+
** AST_NULL_FACTORY doesn't build an AST (AST_FACTORY does, the AST is in EIFFEL_PARSER.root_node after parsing)
 +
* parse (a_file: KL_BINARY_INPUT_FILE) and parse_from_string (a_string: STRING).
 +
 
 
====CLASS_AS====
 
====CLASS_AS====
 
* AST of a class
 
* AST of a class

Revision as of 12:43, 5 June 2006

back to Syntax checking page

Important Classes/Files

eiffel.y

  • Eiffel grammar description.
  • use geyacc to generate eiffel_parser.e from this file

EIFFEL_PARSER

  • inherits from EIFFEL_PARSER_SKELETON (where the features parse, parse_string, make_with_factory are implemented)
  • make_with_factory (a_factory: AST_FACTORY): give argument of type AST_NULL_FACTORY (inherits from AST_FACTORY)
    • AST_NULL_FACTORY doesn't build an AST (AST_FACTORY does, the AST is in EIFFEL_PARSER.root_node after parsing)
  • parse (a_file: KL_BINARY_INPUT_FILE) and parse_from_string (a_string: STRING).

CLASS_AS

  • AST of a class

ERROR

  • deferred; superclass of all error types like EIFFEL_ERROR or SYNTAX_ERROR
  • features line, column: INTEGER give location of error

ERROR_HANDLER

  • feature error_list: ERROR is a list of errors found by the parser

SHARED_ERROR_HANDLER

  • singleton used by all relevant classes

EIFFEL_CLASS_C

  • features build_ast and parse_ast show how the parser can be used.


Implementation

  • based on Paul's code

ERROR classes

  • Create new SYNTAX_ERROR classes that correspond to Paul's classes, but fit into the current hierarchy
  • store start and end position of the error

extend parser to generate the right ERRORs

  • Integrate Paul's changes to eiffel.l and eiffel.y into the current versions.
  • add facilities from Paul's EIFFEL_PARSER_ERROR_REPORTER
    • in existing class like EIFFEL_PARSER_SKELETON (EP_ERROR_REPORTER only inherits SHARED_ERROR_HANDLER and so does EP_SKELETON
    • in new class


Work distributiony

eiffel.y

  • Ueli: 0 - 844: Parent_List
  • Marko: 845 - 1494 Formal Generics
  • Michi: 1495 - 2130 Instruction Call
  • Martin: 2131 - end

error classes

  • Chrigu

classes with errors to check if parser works

  • nobody yet
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