CoffeeFilter Test Report

Description

Top-level catalog for tests in the iXML Community Group Test Suite.

Tests have been contributed from several sources, but the core of the test collection are the tests contributed by Steven Pemberton in December 2021.

Description

Grammars 41-60.

Tests compiled manually in 2018 and 2019, re-packaged and extended (supplying test cases where needed) in 2022.

Note that some tests have alternate results for processors operating in non-standard modes, in particular modes in which they tolerate multiple definitions and undefined nonterminals or in which they do not tolerate non-productive nonterminals or unreachable nonterminals.

For a description of the form in which alternate results are recorded, see tests/misc-grammar/test-catalog.xml.

Sample grammar from Niklaus Wirth, Grundlagen und Techniken des Compilerbaus (Bonn: Addison-Wesley, 1996), pp. 36-37.

Same grammar as sample.grammar.41 except for whitespace handling. This grammar experiments with a pattern in which every low-level token ends with optional whitespace; it's the same pattern shown in the ixml specification grammar. (A different style is shown in sample.grammar.41bis.)

(For what it's worth: in some ways the raw parse tree produced by this grammar feels off -- trailing whitespace is NOT part of an identifier or number! But this approach can be done more or less mechanically and does not have trouble with optional nonterminals or nonterminals which can produce the empty string. So unless whitespace must be exposed in the result, this approach to whitespace appears preferable.)