Treat : as infix operator
Created originally on Bitbucket by piti118 (Piti Ongmongkolkul)
Currently the cell that is of the form function:range function:function range:function are not correctly parsed.
For example, =SUM(OFFSET(A1,1,1):C3) is parsed as
[
('SUM(', 'FUNC', 'OPEN'),
('OFFSET(', 'FUNC', 'OPEN'),
('A1', 'OPERAND', 'RANGE'),
(',', 'SEP', 'ARG'),
('1', 'OPERAND', 'NUMBER'),
(',', 'SEP', 'ARG'),
('1', 'OPERAND', 'NUMBER'),
(')', 'FUNC', 'CLOSE'),
(':C3', 'OPERAND', 'RANGE'), # note the colon
(')', 'FUNC', 'CLOSE')
]This PR fix it such that it is parsed to
[
('SUM(', 'FUNC', 'OPEN'),
('OFFSET(', 'FUNC', 'OPEN'),
('A1', 'OPERAND', 'RANGE'),
(',', 'SEP', 'ARG'),
('1', 'OPERAND', 'NUMBER'),
(',', 'SEP', 'ARG'),
('1', 'OPERAND', 'NUMBER'),
(')', 'FUNC', 'CLOSE'),
(':', OP_IN, ''), # notice : is now treated as OP_IN
('C3', 'OPERAND', 'RANGE'),
(')', 'FUNC', 'CLOSE')
]This PR also maintain backward compatibility of how the parser treat constant range such as A1:A2 or A1:3 as a single range.
This issue affect library such as pycel which the PR for the said library will be submitted shortly.