- slight cleanups

DHParser/parsers.py

@@ -1040,7 +1040,6 @@ def dsl_error_msg(parser: Parser, error_str: str) -> str:
     return " ".join(msg)
 
 
-
 ########################################################################
 #
 # Token and Regular Expression parser classes (i.e. leaf classes)
@@ -2081,7 +2080,7 @@ class Compiler:
     """
     Class Compiler is the abstract base class for compilers. Compiler
     objects are callable and take the root node of the abstract
-    syntax tree (AST) as agrument and return the compiled code in a
+    syntax tree (AST) as argument and return the compiled code in a
     format chosen by the compiler itself.
 
     Subclasses implementing a compiler must define `on_XXX()`-methods
@@ -2170,7 +2169,7 @@ class Compiler:
         Calls the compilation method for the given node and returns the
         result of the compilation.
 
-        The method's name is dreived from either the node's parser
+        The method's name is derived from either the node's parser
         name or, if the parser is anonymous, the node's parser's class
         name by adding the prefix 'on_'.
 
@@ -2230,7 +2229,7 @@ def compile_source(source: str,
         1. The result as returned by the compiler or ``None`` in case
             of failure,
         2. A list of error or warning messages
-        3. The root-node of the abstract syntax treelow
+        3. The root-node of the abstract syntax tree
     """
     source_text = load_if_file(source)
     log_file_name = logfile_basename(source, compiler)

TODO.md

@@ -4,4 +4,5 @@ General TODO-List
 - Position Handling: `Node._pos` and `Node._len` should be set by 
   parser guard to allow for early dropping of nodes. (Should speed
   up tree-traversal later)
- 
\ No newline at end of file
+ 
+- Position handling should provide for position shifts during preprocessing

examples/CommonMark/README.md

+OUTDATED
+
 CommonMark
 ==========
 

examples/unit_test_praesentation/beipiel1.py

-import functools
-import sys
-
-sys.path.extend(['../../', '../', './'])
-
-from DHParser import *
-
-
-arithmetik_ebnf = """ 
-    expr = expr ("+"|"-") term | term
-    term = term ("*"|"/") factor | factor
-    factor = /[0-9]+/~ | "(" expr ")"
-    """
-
-ASTTable = {
-    "+": remove_expendables,
-    "*": replace_by_single_child,
-    "factor": [reduce_single_child, remove_brackets]
-}
-
-parser = grammar_provider(arithmetik_ebnf)()
-transformer = functools.partial(traverse, processing_table=ASTTable.copy())
-
-
-syntax_tree = parser("5 + 3 * 4")
-assert not syntax_tree.error_flag, str(syntax_tree.collect_errors())
-transformer(syntax_tree)
-
-print(">>>>> Ausdruck ohne Klammern:\n")
-print(syntax_tree.as_sxpr(compact = True))
-
-
-syntax_tree = parser("(5 + 3) * 4")
-assert not syntax_tree.error_flag, str(syntax_tree.collect_errors())
-transformer(syntax_tree)
-
-print("\n\n>>>>> Ausdruck mit Klammern:\n")
-print(syntax_tree.as_sxpr(compact = True))