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# File 'lib/oracle-sql-parser/grammar/expression/cast.rb', line 42
def _nt_cast_expression
start_index = index
if node_cache[:cast_expression].has_key?(index)
cached = node_cache[:cast_expression][index]
if cached
node_cache[:cast_expression][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
@index = cached.interval.end
end
return cached
end
i0, s0 = index, []
r1 = _nt_cast_keyword
s0 << r1
if r1
r3 = _nt_space
if r3
r2 = r3
else
r2 = instantiate_node(SyntaxNode,input, index...index)
end
s0 << r2
if r2
if (match_len = has_terminal?('(', false, index))
r4 = true
@index += match_len
else
terminal_parse_failure('\'(\'')
r4 = nil
end
s0 << r4
if r4
r6 = _nt_space
if r6
r5 = r6
else
r5 = instantiate_node(SyntaxNode,input, index...index)
end
s0 << r5
if r5
i7, s7 = index, []
r8 = _nt_expr
s7 << r8
if r8
r9 = _nt_multiset_keyword
s7 << r9
if r9
r11 = _nt_space
if r11
r10 = r11
else
r10 = instantiate_node(SyntaxNode,input, index...index)
end
s7 << r10
if r10
if (match_len = has_terminal?('(', false, index))
r12 = true
@index += match_len
else
terminal_parse_failure('\'(\'')
r12 = nil
end
s7 << r12
if r12
r14 = _nt_space
if r14
r13 = r14
else
r13 = instantiate_node(SyntaxNode,input, index...index)
end
s7 << r13
if r13
r15 = _nt_subquery
s7 << r15
if r15
r17 = _nt_space
if r17
r16 = r17
else
r16 = instantiate_node(SyntaxNode,input, index...index)
end
s7 << r16
if r16
if (match_len = has_terminal?(')', false, index))
r18 = true
@index += match_len
else
terminal_parse_failure('\')\'')
r18 = nil
end
s7 << r18
end
end
end
end
end
end
end
if s7.last
r7 = instantiate_node(SyntaxNode,input, i7...index, s7)
r7.extend(CastExpression0)
else
@index = i7
r7 = nil
end
s0 << r7
if r7
r19 = _nt_as_keyword
s0 << r19
if r19
r20 = _nt_type_name
s0 << r20
if r20
if (match_len = has_terminal?(')', false, index))
r21 = true
@index += match_len
else
terminal_parse_failure('\')\'')
r21 = nil
end
s0 << r21
end
end
end
end
end
end
end
if s0.last
r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
r0.extend(CastExpression1)
else
@index = i0
r0 = nil
end
node_cache[:cast_expression][start_index] = r0
r0
end
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