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A static code analysis tool with a focus on code consistency and teaching.
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lib/credo/check/consistency/space_around_operators/space_helper.ex
defmodule Credo.Check.Consistency.SpaceAroundOperators.SpaceHelper do
@doc """
Returns true if there is no space before the operator (usually).
Examples:
x..-1 # .. is the operator here and there is usually no space before that
"""
def usually_no_space_before?({:identifier, _, _}, {_, _, :-}, _), do: false
def usually_no_space_before?({:number, _, _}, {_, _, :-}, _), do: false
def usually_no_space_before?(_, {_, _, :-}, _), do: true
def usually_no_space_before?(_, {_, _, :..}, _), do: true
def usually_no_space_before?(_, _, _), do: false
@doc """
Returns true if there is no space after the operator (usually).
Examples:
x..-1 # .. is the operator here and there is usually no space before that
"""
def usually_no_space_after?({_, _, :=}, {_, _, :-}, _), do: true
def usually_no_space_after?({_, _, :..}, {_, _, :-}, _), do: true
def usually_no_space_after?(_, {_, _, :-}, _), do: false
def usually_no_space_after?(_, {_, _, :..}, _), do: true
def usually_no_space_after?(_, _, _), do: false
def operator?({:comp_op, _, _}), do: true
def operator?({:comp_op2, _, _}), do: true
def operator?({:dual_op, _, _}), do: true
def operator?({:mult_op, _, _}), do: true
def operator?({:two_op, _, _}), do: true
def operator?({:arrow_op, _, _}), do: true
def operator?({:rel_op, _, _}), do: true
def operator?({:rel_op2, _, _}), do: true
def operator?({:and_op, _, _}), do: true
def operator?({:or_op, _, _}), do: true
def operator?({:match_op, _, _}), do: true
def operator?({:in_match_op, _, _}), do: true
def operator?({:stab_op, _, _}), do: true
def operator?({:pipe_op, _, _}), do: true
def operator?(_), do: false
def no_space_between?(arg1, arg2) do
{line_no, _col_start, col_end} = position(arg1)
{line_no2, col_start2, _col_end} = position(arg2)
line_no == line_no2 && col_end == col_start2
end
def space_between?(arg1, arg2) do
{line_no, _col_start, col_end} = position(arg1)
{line_no2, col_start2, _col_end} = position(arg2)
line_no == line_no2 && col_end < col_start2
end
def position({_, pos, _, _, _}), do: pos
def position({_, pos, _, _}), do: pos
def position({_, pos, _}), do: pos
def position({_, pos}), do: pos
def trigger_token({_, pos_tuple, trigger}), do: {pos_tuple, trigger}
end