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# File 'lib/ceml/lang/tt/instructions.rb', line 1060
def _nt_condition
start_index = index
if node_cache[:condition].has_key?(index)
cached = node_cache[:condition][index]
if cached
cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
@index = cached.interval.end
end
return cached
end
i0, s0 = index, []
r1 = _nt_ws
s0 << r1
if r1
i2 = index
if has_terminal?('if', false, index)
r3 = instantiate_node(SyntaxNode,input, index...(index + 2))
@index += 2
else
terminal_parse_failure('if')
r3 = nil
end
if r3
r2 = r3
else
if has_terminal?('unless', false, index)
r4 = instantiate_node(SyntaxNode,input, index...(index + 6))
@index += 6
else
terminal_parse_failure('unless')
r4 = nil
end
if r4
r2 = r4
else
@index = i2
r2 = nil
end
end
s0 << r2
if r2
r5 = _nt_ws
s0 << r5
if r5
r6 = _nt_id
s0 << r6
end
end
end
if s0.last
r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
r0.extend(Condition0)
r0.extend(Condition1)
else
@index = i0
r0 = nil
end
node_cache[:condition][start_index] = r0
r0
end
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