Nested IndentedBlock Issue when Implementing if/elif/else

[hfudev]

Hi, I'm trying to implement the nested if/elif/else with IndentedBlock.

from pyparsing import (Forward, Group, IndentedBlock, Keyword, Opt,
                       SkipTo, Suppress, Word, alphas, ZeroOrMore)

STMT = Forward()
SUITE = IndentedBlock(STMT)

condition = SkipTo(':').set_results_name('condition') + Suppress(':')
if_decl = Keyword('if') + condition
elif_decl = Keyword('elif') + condition
else_decl = Keyword('else:')
if_ = Group(if_decl + SUITE)
elif_ = Group(elif_decl + SUITE)
else_ = Group(else_decl + SUITE)

CONDITIONAL = Group(if_ + ZeroOrMore(elif_) + Opt(else_))

STMT <<= CONDITIONAL | Word(alphas)

data = '''
if A:
    a
    if B:
        b
elif C:
    c
else:
    d
'''

STMT.parseString(data, parse_all=True).pprint()

The output is (Modified the format a bit, to make it more clear.)

[
    [
        ['if',
            'A',
            ['a', [
                ['if', 'B', ['b']],
                ['elif', 'C', ['c']],
                ['else:', ['d']]
            ]]
        ]
    ]
]

Seems like the inner if clause is wrongly parsed.

[hfudev]

Just tested with a modified version of https://github.com/pyparsing/pyparsing/blob/master/examples/indented_block_example.py

data = """\
    A
        a
        b
        c
    B
        d
        b
            e
            f
        g
    C
        h
"""

group = pp.Forward()
group <<= pp.Group(pp.Char(pp.alphas) + pp.Group(pp.IndentedBlock(pp.Char(pp.alphas) | group)))

print(pp.OneOrMore(group).parseString(data))

The output is still not right. (modified the format a bit to make it clearer)

[
    ['A', [
        ['a', 'b', 'c']
    ]],
    ['B', [
        ['d', 'b']
    ]],
    ['e', [
        ['f']
    ]],
    ['g', [
        ['C']
    ]]
]

Seems like the weird behavior may relate to Forward?