Reorganize project layout. Add buildability.

python/heckformat/parser.py

@@ -0,0 +1,118 @@
+import ply.yacc as yacc
+
+"""
+Parser for HECKformat lines using PLY Parser.
+"""
+
+from .lexer import tokens
+
+def p_value(p):
+    """
+    value : BASE16
+          | BASE10
+          | STRING
+          | ATOM
+    """
+    #print(p[0], p[1])
+    p[0] = ("value", p[1])
+
+
+def p_elm(p):
+    """
+    elm : ATOM
+        | ELEMENT
+    """
+    p[0] = p[1]
+
+def p_attribute(p):
+    """attribute : ATOM ATTRIB value"""
+    # print(p[0], p[1])
+    p[0] = ("attribute", p[1], p[3])
+
+
+def p_attributes(p):
+    """
+    attributes : attributes attribute
+    attributes : attribute
+    """
+    if len(p) == 2:
+        p[0] = ["attributes", p[1]]
+    else:
+        p[0] = p[1]
+        p[0].append(p[2])
+
+
+def p_section(p):
+    """
+    section : SECTION elm
+            | SECTION elm attributes
+    """
+    if (len(p) == 3):
+        p[0] = ("section", p[2])
+    else:
+        p[0] = ("section", p[2], p[3])
+
+def p_values(p):
+    """
+    values : values value
+    values : value
+    """
+    if len(p) == 2:
+        p[0] = ["values", p[1]]
+    else:
+        p[0] = p[1]
+        p[0].append(p[2])
+
+
+def p_element(p):
+    """
+    element : elm values
+            | elm values attributes
+            | elm attributes
+            | elm
+    """
+    # print(len(p))
+    if len(p) <= 2:
+        p[0] = ["element", p[1]]
+    else:
+        p[0] = ["element", p[1], p[2]]
+        if (len(p) == 4):
+            p[0].append(p[3])
+
+
+def p_statement(p):
+    """
+    statement  : element
+               | DEEP element
+               | section
+    """
+    if (len(p) > 2):
+        p[0] = ('deep', len(p[1]), p[2])
+    else:
+        p[0] = p[1]
+
+
+def p_error(p):
+    if not p:
+        return
+    else:
+        print(f"Syntax error {p}")
+
+parser = yacc.yacc(start="statement")
+
+
+TEST_STRING = [
+    '%%% heck',
+    '%%% heck foo=bar',
+    '%%% heck bar=-5l quux="hello! how are you today?" fred=69 barney=nice',
+    'title "My website!"',
+    'zoom 5.73',
+    'tags yo fresh',
+    'dumper 1 2 3 4 5 6 7 8 9 dumpped=True',
+    '> big_dumper 32 23 384848',
+    '>> deep_dumper 1 2 3 a=false'
+]
+
+if __name__ == "__main__":
+    for test in TEST_STRING:
+        print(parser.parse(test))