Arithmetic evaluation: Difference between revisions
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SqrtNegInf (talk | contribs) m (→{{header|Perl 6}}: flat before reduction) |
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=={{header|Perl 6}}==
{{
<lang perl6>sub ev (Str $s --> Num) {
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my sub sum ($x) {
[+] flat product($x<product>), map
{ minus($^y[0] eq '-') * product $^y<product> },
|($x[0] or [])
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my sub product ($x) {
[*] flat factor($x<factor>), map
{ factor($^y<factor>) ** minus($^y[0] eq '/') },
|($x[0] or [])
| |||