code: def glsl_code(expr, assign_to=None, **settings):
      """Converts an expr to a string of GLSL code
  
      Parameters
      ==========
  
      expr : Expr
          A SymPy expression to be converted.
      assign_to : optional
          When given, the argument is used for naming the variable or variables
          to which the expression is assigned. Can be a string, ``Symbol``,
          ``MatrixSymbol`` or ``Indexed`` type object. In cases where ``expr``
          would be printed as an array, a list of string or ``Symbol`` objects
          can also be passed.
  
          This is helpful in case of line-wrapping, or for expressions that
          generate multi-line statements.  It can also be used to spread an array-like
          expression into multiple assignments.
      use_operators: bool, optional
          If set to False, then *,/,+,- operators will be replaced with functions
          mul, add, and sub, which must be implemented by the user, e.g. for
          implementing non-standard rings or emulated quad/octal precision.
          [default=True]
      glsl_types: bool, optional
          Set this argument to ``False`` in order to avoid using the ``vec`` and ``mat``
          types.  The printer will instead use arrays (or nested arrays).
          [default=True]
      mat_nested: bool, optional
          GLSL version 4.3 and above support nested arrays (arrays of arrays).  Set this to ``True``
          to render matrices as nested arrays.
          [default=False]
      mat_separator: str, optional
          By default, matrices are rendered with newlines using this separator,
          making them easier to read, but less compact.  By removing the newline
          this option can be used to make them more vertically compact.
          [default=',\n']
      mat_transpose: bool, optional
          GLSL's matrix multiplication implementation assumes column-major indexing.
          By default, this printer ignores that convention. Setting this option to
          ``True`` transposes all matrix output.
          [default=False]
      array_type: str, optional
          The GLSL array constructor type.
          [default='float']
      precision : integer, optional
          The precision for numbers such as pi [default=15].
      user_functions : dict, optional
          A dictionary where keys are ``FunctionClass`` instances and values are
          their string representations. Alternatively, the dictionary value can
          be a list of tuples i.e. [(argument_test, js_function_string)]. See
          below for examples.
      human : bool, optional
          If True, the result is a single string that may contain some constant
          declarations for the number symbols. If False, the same information is
          returned in a tuple of (symbols_to_declare, not_supported_functions,
          code_text). [default=True].
      contract: bool, optional
          If True, ``Indexed`` instances are assumed to obey tensor contraction
          rules and the corresponding nested loops over indices are generated.
          Setting contract=False will not generate loops, instead the user is
          responsible to provide values for the indices in the code.
          [default=True].
  
      Examples
      ========
  
      >>> from sympy import glsl_code, symbols, Rational, sin, ceiling, Abs
      >>> x, tau = symbols("x, tau")
      >>> glsl_code((2*tau)**Rational(7, 2))
      '8*sqrt(2)*pow(tau, 3.5)'
      >>> glsl_code(sin(x), assign_to="float y")
      'float y = sin(x);'
  
      Various GLSL types are supported:
      >>> from sympy import Matrix, glsl_code
      >>> glsl_code(Matrix([1,2,3]))
      'vec3(1, 2, 3)'
  
      >>> glsl_code(Matrix([[1, 2],[3, 4]]))
      'mat2(1, 2, 3, 4)'
  
      Pass ``mat_transpose = True`` to switch to column-major indexing:
      >>> glsl_code(Matrix([[1, 2],[3, 4]]), mat_transpose = True)
      'mat2(1, 3, 2, 4)'
  
      By default, larger matrices get collapsed into float arrays:
      >>> print(glsl_code( Matrix([[1,2,3,4,5],[6,7,8,9,10]]) ))
      float[10](
         1, 2, 3, 4,  5,
         6, 7, 8, 9, 10
      ) /* a 2x5 matrix */
  
      The type of array constructor used to print GLSL arrays can be controlled
      via the ``array_type`` parameter:
      >>> glsl_code(Matrix([1,2,3,4,5]), array_type='int')
      'int[5](1, 2, 3, 4, 5)'
  
      Passing a list of strings or ``symbols`` to the ``assign_to`` parameter will yield
      a multi-line assignment for each item in an array-like expression:
      >>> x_struct_members = symbols('x.a x.b x.c x.d')
      >>> print(glsl_code(Matrix([1,2,3,4]), assign_to=x_struct_members))
      x.a = 1;
      x.b = 2;
      x.c = 3;
      x.d = 4;
  
      This could be useful in cases where it's desirable to modify members of a
      GLSL ``Struct``.  It could also be used to spread items from an array-like
      expression into various miscellaneous assignments:
      >>> misc_assignments = ('x[0]', 'x[1]', 'float y', 'float z')
      >>> print(glsl_code(Matrix([1,2,3,4]), assign_to=misc_assignments))
      x[0] = 1;
      x[1] = 2;
      float y = 3;
      float z = 4;
  
      Passing ``mat_nested = True`` instead prints out nested float arrays, which are
      supported in GLSL 4.3 and above.
      >>> mat = Matrix([
      ... [ 0,  1,  2],
      ... [ 3,  4,  5],
      ... [ 6,  7,  8],
      ... [ 9, 10, 11],
      ... [12, 13, 14]])
      >>> print(glsl_code( mat, mat_nested = True ))
      float[5][3](
         float[]( 0,  1,  2),
         float[]( 3,  4,  5),
         float[]( 6,  7,  8),
         float[]( 9, 10, 11),
         float[](12, 13, 14)
      )
  
  
  
      Custom printing can be defined for certain types by passing a dictionary of
      "type" : "function" to the ``user_functions`` kwarg. Alternatively, the
      dictionary value can be a list of tuples i.e. [(argument_test,
      js_function_string)].
  
      >>> custom_functions = {
      ...   "ceiling": "CEIL",
      ...   "Abs": [(lambda x: not x.is_integer, "fabs"),
      ...           (lambda x: x.is_integer, "ABS")]
      ... }
      >>> glsl_code(Abs(x) + ceiling(x), user_functions=custom_functions)
      'fabs(x) + CEIL(x)'
  
      If further control is needed, addition, subtraction, multiplication and
      division operators can be replaced with ``add``, ``sub``, and ``mul``
      functions.  This is done by passing ``use_operators = False``:
  
      >>> x,y,z = symbols('x,y,z')
      >>> glsl_code(x*(y+z), use_operators = False)
      'mul(x, add(y, z))'
      >>> glsl_code(x*(y+z*(x-y)**z), use_operators = False)
      'mul(x, add(y, mul(z, pow(sub(x, y), z))))'
  
      ``Piecewise`` expressions are converted into conditionals. If an
      ``assign_to`` variable is provided an if statement is created, otherwise
      the ternary operator is used. Note that if the ``Piecewise`` lacks a
      default term, represented by ``(expr, True)`` then an error will be thrown.
      This is to prevent generating an expression that may not evaluate to
      anything.
  
      >>> from sympy import Piecewise
      >>> expr = Piecewise((x + 1, x > 0), (x, True))
      >>> print(glsl_code(expr, tau))
      if (x > 0) {
         tau = x + 1;
      }
      else {
         tau = x;
      }
  
      Support for loops is provided through ``Indexed`` types. With
      ``contract=True`` these expressions will be turned into loops, whereas
      ``contract=False`` will just print the assignment expression that should be
      looped over:
  
      >>> from sympy import Eq, IndexedBase, Idx
      >>> len_y = 5
      >>> y = IndexedBase('y', shape=(len_y,))
      >>> t = IndexedBase('t', shape=(len_y,))
      >>> Dy = IndexedBase('Dy', shape=(len_y-1,))
      >>> i = Idx('i', len_y-1)
      >>> e=Eq(Dy[i], (y[i+1]-y[i])/(t[i+1]-t[i]))
      >>> glsl_code(e.rhs, assign_to=e.lhs, contract=False)
      'Dy[i] = (y[i + 1] - y[i])/(t[i + 1] - t[i]);'
  
      >>> from sympy import Matrix, MatrixSymbol
      >>> mat = Matrix([x**2, Piecewise((x + 1, x > 0), (x, True)), sin(x)])
      >>> A = MatrixSymbol('A', 3, 1)
      >>> print(glsl_code(mat, A))
      A[0][0] = pow(x, 2.0);
      if (x > 0) {
         A[1][0] = x + 1;
      }
      else {
         A[1][0] = x;
      }
      A[2][0] = sin(x);
      """
      return GLSLPrinter(settings).doprint(expr, assign_to)
  
imports: from __future__ import annotations
  from sympy.core import Basic, S
  from sympy.core.function import Lambda
  from sympy.core.numbers import equal_valued
  from sympy.printing.codeprinter import CodePrinter
  from sympy.printing.precedence import precedence
  from functools import reduce
label_desc: Use image node_id 1 for calling a global function with example usage: glsl_code(expr, assign_to) and returns: GLSLPrinter