VHDL complex memory array code

Hello

I am writing a simple code for a 2 dimensional complex number (integer) 
array in VHDL. The matrix is basically
[ 1 1 1 1 ,
  1 -1 j -j,
  1 -1 j -j,
  1 1 -1 -1,
  1 -1 -j j]

This is my code

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library ieee;

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use ieee.std_logic_1164.all;

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use ieee.numeric_std.all;

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entity IFFT_matrix is

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  port (address_r, address_c: IN std_logic_vector (1 downto 0);

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        wr, wi: OUT std_logic_vector (7 downto 0)); 

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end IFFT_matrix;

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architecture behavior of IFFT_matrix is

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type matrix is array (0 to 3, 0 to 3) of integer range -1 to 1; --range depends on IFFT size

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constant wr_matrix: matrix:= ((1,1,1,1),(1,-1,0,0),(1,1,-1,-1),(1,-1,0,0));

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constant wi_matrix: matrix:= ((0,0,0,0),(0,0,1,-1),(0,0,0,0),(0,0,-1,1));

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begin

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wr <= std_logic_vector(to_signed(wr_matrix (to_integer(unsigned(address_r), to_integer(unsigned(address_c)))));

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wi <= std_logic_vector(to_signed(wi_matrix (to_integer(unsigned(address_r), to_integer(unsigned(address_c)))));

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end behavior;

Compiling with vhdlan gives me this error:

"Parsing design file 'IFFT_matrix.vhd'

Error-[IEEEVHDLSYNTAXERR] Syntax error
IFFT_matrix.vhd, 18

  ...x (to_integer(unsigned(address_r), 
to_integer(unsigned(address_c)))));...
                                                                          ^
  Syntax error detected during VHDL parsing.


Error-[IEEEVHDLSYNTAXERR] Syntax error
IFFT_matrix.vhd, 19

  ...x (to_integer(unsigned(address_r), 
to_integer(unsigned(address_c)))));...
                                                                          ^
  Syntax error detected during VHDL parsing.

"IFFT_matrix.vhd": errors: 2; warnings: 0.
[oalsamma@bifur ~/intel]$ gedit IFFT_matrix.vhd"

I cannot quite figure out what to fix. Can you help please?