# this captures the output for the mhchem's "<=>", "<<=>", and "<=>>" output (there are no Unicode arrows for them)
   # this isn't a perfect match, but should be good enough and allows merging all three (see github.com/NSoiffer/MathCAT/issues/60)
   name: chemistry-mhchem-equilibrium-arrow
   tag: mover
   match:
   -    "*[1][substring(., 1, 1)='↽'] and"
   -    "*[2][substring(., string-length(), 1)='⇀']"
   replace:
   - intent:
      name: "chemical-arrow-operator"
      children:
      - test:
          if: "*[1][self::m:mrow]"
          then_test:
              if: "*[2][self::m:mrow]"
              then: [t: "🣒"]    # new in Unicode 17.0 (<=>)          -  FOUND: U+01F8D2
              else: [t: "🣔"]    # new in Unicode 17.0  (<<=>)       -  FOUND: U+01F8D4
          else: [t: "🣓"]        # new in Unicode 17.0  (<==>>).   -  FOUND:  U+01F8D3

              then: [t: "🣒"]    # new in Unicode 17.0 (<=>)          -  U+01F8D1
              else: [t: "🣔"]    # new in Unicode 17.0  (<<=>)       -  U+01F8D3
          else: [t: "🣓"]        # new in Unicode 17.0  (<==>>).   -  U+01F8D2

- name: chemical-arrow-operator
  tag: chemical-arrow-operator
  match: "."
  replace:
  # FIX: this might be better/more efficient if in unicode.yaml
  - bookmark: "@id"
  - test:
    - if: ".='→' or .='⟶'"
      then_test:
        if: "$Verbosity='Terse'"
        then: [t: "forms"]      # phrase(hydrogen and oxygen 'forms' water )
        else: [t: "reacts to form"]      # phrase(hydrogen and oxygen 'reacts to form' water)
    - else_if: ".='⇌' or .='🣒'"  -  FOUND: U+01F8D2
      then: [t: "is in equilibrium with"]      # phrase(a reactant 'is in equilibrium with' a product)
    - else_if: ".='🣔'"  -  FOUND: U+01F8D4
      then: [t: "is in equilibrium biased to the left with"]      # phrase(the reactant 'is in equilibrium biased to the left with' the product)
    - else_if: ".='🣓'" -  FOUND:  U+01F8D3
      then: [t: "is in equilibrium biased to the right with"]      # phrase(the reactant 'is in equilibrium biased to the right with' the product)
      else: [x: "*"]

- name: chemical-arrow-operator
  tag: chemical-arrow-operator
  match: "."
  replace:
  # FIX: this might be better/more efficient if in unicode.yaml
  - bookmark: "@id"
  - test:
    - if: ".='→' or .='⟶'"
      then_test:
        if: "$Verbosity='Terse'"
        then: [t: "forms"]      # phrase(hydrogen and oxygen 'forms' water )
        else: [t: "reacts to form"]      # phrase(hydrogen and oxygen 'reacts to form' water)
    - else_if: ".='⇌' or .='🣑'" -  U+01F8D1
      then: [t: "is in equilibrium with"]      # phrase(a reactant 'is in equilibrium with' a product)
    - else_if: ".='🣓'"  -  U+01F8D3
      then: [t: "is in equilibrium biased to the left with"]      # phrase(the reactant 'is in equilibrium biased to the left with' the product)
    - else_if: ".='🣒'"-  U+01F8D2
      then: [t: "is in equilibrium biased to the right with"]      # phrase(the reactant 'is in equilibrium biased to the right with' the product)
      else: [x: "*"]