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Resolves assignments to multiple variables with assignment operator chaining (a = b = c = 1.) into several commands.
Since different (implicit) conversion rules may apply to the assignments, the rightmost term can not be repeated, even if it is a literal.
This rule is part of the essential profile, as it is explicitly demanded by the Clean ABAP Styleguide.
- (no options available for this rule)
METHOD equals_sign_chaining.
" assign a number literal
a = b = 42. " comment
" assign a string literal
c = d = e = 'abc'.
" assign a simple variable
f = g = h = iv_value.
" assign a complex expression
i = j = k = l = m = complex_expression( iv_param_1 = 5
iv_param_2 = 'abc'
iv_param_3 = VALUE #( iv_param_4 = 42
iv_param_5 = iv_value ) ).
" depending on variable types, assignments may invoke a sequence of implicit
" conversion rules, therefore this can NOT be resolved into lv_numc8 = lv_float
" and lv_datum = lv_float, but rather, all conversion steps must be kept:
lv_datum = lv_numc8 = lv_float.
ENDMETHOD.Resulting code:
METHOD equals_sign_chaining.
" assign a number literal
b = 42. " comment
a = b.
" assign a string literal
e = 'abc'.
d = e.
c = d.
" assign a simple variable
h = iv_value.
g = h.
f = g.
" assign a complex expression
m = complex_expression( iv_param_1 = 5
iv_param_2 = 'abc'
iv_param_3 = VALUE #( iv_param_4 = 42
iv_param_5 = iv_value ) ).
l = m.
k = l.
j = k.
i = j.
" depending on variable types, assignments may invoke a sequence of implicit
" conversion rules, therefore this can NOT be resolved into lv_numc8 = lv_float
" and lv_datum = lv_float, but rather, all conversion steps must be kept:
lv_numc8 = lv_float.
lv_datum = lv_numc8.
ENDMETHOD.