Module: Postsvg::Visitors::PsVisitor::Arithmetic

Included in:
Postsvg::Visitors::PsVisitor
Defined in:
lib/postsvg/visitors/ps_visitor/arithmetic.rb

Overview

Arithmetic / math operator handlers. Each pops operands from the RUNTIME stack (not the AST), computes the result, and pushes it back. The AST operands are for parse-time stack shape only; at runtime they may be Computed sentinels (from chained ops) and must be ignored.

Instance Method Summary collapse

Instance Method Details

#visit_abs(_op, _ctx) ⇒ Object 



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 58

def visit_abs(_op, _ctx)
  @stack << pop_runtime_number.abs
end

#visit_add(_op, _ctx) ⇒ Object 



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 12

def visit_add(_op, _ctx)
  b = pop_runtime_number
  a = pop_runtime_number
  @stack << a + b
end

#visit_atan(_op, _ctx) ⇒ Object 



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 85

def visit_atan(_op, _ctx)
  b = pop_runtime_number
  a = pop_runtime_number
  @stack << Math.atan2(a.to_f, b.to_f) * (180.0 / Math::PI)
end

#visit_ceiling(_op, _ctx) ⇒ Object 



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 62

def visit_ceiling(_op, _ctx)
  @stack << pop_runtime_number.to_f.ceil
end

#visit_cos(_op, _ctx) ⇒ Object 



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 91

def visit_cos(_op, _ctx)
  @stack << Math.cos(pop_runtime_number.to_f * Math::PI / 180.0)
end

#visit_div(_op, _ctx) ⇒ Object

Raises:



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 30

def visit_div(_op, _ctx)
  divisor = pop_runtime_number
  a = pop_runtime_number
  raise RenderError, "division by zero" if divisor.zero?

  @stack << (a.to_f / divisor.to_f)
end

#visit_exp(_op, _ctx) ⇒ Object 



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 107

def visit_exp(_op, _ctx)
  b = pop_runtime_number
  a = pop_runtime_number
  @stack << a.to_f**b.to_f
end

#visit_floor(_op, _ctx) ⇒ Object 



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 66

def visit_floor(_op, _ctx)
  @stack << pop_runtime_number.to_f.floor
end

#visit_idiv(_op, _ctx) ⇒ Object

Raises:



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 38

def visit_idiv(_op, _ctx)
  divisor = pop_runtime_number.to_i
  a = pop_runtime_number.to_i
  raise RenderError, "division by zero" if divisor.zero?

  @stack << (a / divisor)
end

#visit_ln(_op, _ctx) ⇒ Object 



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 99

def visit_ln(_op, _ctx)
  @stack << Math.log(pop_runtime_number.to_f)
end

#visit_log(_op, _ctx) ⇒ Object 



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 103

def visit_log(_op, _ctx)
  @stack << Math.log10(pop_runtime_number.to_f)
end

#visit_mod(_op, _ctx) ⇒ Object

Raises:



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 46

def visit_mod(_op, _ctx)
  divisor = pop_runtime_number.to_i
  a = pop_runtime_number.to_i
  raise RenderError, "modulo by zero" if divisor.zero?

  @stack << (a % divisor)
end

#visit_mul(_op, _ctx) ⇒ Object 



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 24

def visit_mul(_op, _ctx)
  b = pop_runtime_number
  a = pop_runtime_number
  @stack << a * b
end

#visit_neg(_op, _ctx) ⇒ Object 



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 54

def visit_neg(_op, _ctx)
  @stack << -pop_runtime_number
end

#visit_round(_op, _ctx) ⇒ Object 



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 70

def visit_round(_op, _ctx)
  @stack << pop_runtime_number.to_f.round
end

#visit_sin(_op, _ctx) ⇒ Object 



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 95

def visit_sin(_op, _ctx)
  @stack << Math.sin(pop_runtime_number.to_f * Math::PI / 180.0)
end

#visit_sqrt(_op, _ctx) ⇒ Object

Raises:



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 78

def visit_sqrt(_op, _ctx)
  operand = pop_runtime_number
  raise RenderError, "sqrt of negative" if operand.negative?

  @stack << Math.sqrt(operand.to_f)
end

#visit_sub(_op, _ctx) ⇒ Object 



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 18

def visit_sub(_op, _ctx)
  b = pop_runtime_number
  a = pop_runtime_number
  @stack << a - b
end

#visit_truncate(_op, _ctx) ⇒ Object 



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# File 'lib/postsvg/visitors/ps_visitor/arithmetic.rb', line 74

def visit_truncate(_op, _ctx)
  @stack << pop_runtime_number.to_f.truncate
end