| 1 | |
| 2 | Expression Language and Assignments <a class="group-link" href="chap-expr-lang.html">expr-lang</a> |
| 3 | |
| 4 | |
| 5 | [Assignment] assign = |
| 6 | aug-assign += -= *= /= **= //= %= |
| 7 | &= |= ^= <<= >>= |
| 8 | [Literals] atom-literal true false null |
| 9 | int-literal 42 65_536 0xFF 0o755 0b10 |
| 10 | float-lit 3.14 1.5e-10 |
| 11 | char-literal \\ \t \" \y00 \u{3bc} |
| 12 | X num-suffix 42 K Ki M Mi G Gi T Ti / ms us |
| 13 | ysh-string "x is $x" $"x is $x" r'[a-z]\n' |
| 14 | u'line\n' b'byte \yff' |
| 15 | triple-quoted """ $""" r''' u''' b''' |
| 16 | str-template ^"$a and $b" for Str::replace() |
| 17 | list-literal ['one', 'two', 3] :| unquoted words | |
| 18 | dict-literal {name: 'bob'} {a, b} |
| 19 | range 1 .. n+1 |
| 20 | block-expr ^(echo $PWD) |
| 21 | expr-literal ^[1 + 2*3] |
| 22 | X expr-sub $[myobj] |
| 23 | X expr-splice @[myobj] |
| 24 | [Operators] op-precedence Like Python |
| 25 | concat s1 ++ s2, L1 ++ L2 |
| 26 | ysh-equals === !== ~== is, is not |
| 27 | ysh-in in, not in |
| 28 | ysh-compare < <= > >= (numbers only) |
| 29 | ysh-logical not and or |
| 30 | ysh-arith + - * / // % ** |
| 31 | ysh-bitwise ~ & | ^ << >> |
| 32 | ysh-ternary '+' if x >= 0 else '-' |
| 33 | ysh-index s[0] mylist[3] mydict['key'] |
| 34 | ysh-attr mydict.key |
| 35 | ysh-slice a[1:-1] s[1:-1] |
| 36 | func-call f(x, y; ...named) |
| 37 | thin-arrow mylist->pop() |
| 38 | fat-arrow mystr => startsWith('prefix') |
| 39 | match-ops ~ !~ ~~ !~~ |
| 40 | [Eggex] re-literal / d+ ; re-flags ; ERE / |
| 41 | re-primitive %zero 'sq' |
| 42 | class-literal [c a-z 'abc' @str_var \\ \xFF \u{3bc}] |
| 43 | named-class dot digit space word d s w |
| 44 | re-repeat d? d* d+ d{3} d{2,4} |
| 45 | re-compound seq1 seq2 alt1|alt2 (expr1 expr2) |
| 46 | re-capture <capture d+ as name: int> |
| 47 | re-splice Subpattern @subpattern |
| 48 | re-flags reg_icase reg_newline |
| 49 | X re-multiline /// |