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Document limitations of operators (closes #24)

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Karol Stasiak 2020-01-12 20:53:11 +01:00
parent 49bf0d2777
commit 63866fffe3
1 changed files with 6 additions and 4 deletions
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10
docs/lang/operators.md
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@ -54,6 +54,8 @@ In the descriptions below, arguments to the operators are explained as follows:
* `constant` means a compile-time constant
* `trivial` means either a constant or a non-stack variable
* `simple` means either: a constant, a non-stack variable,
a pointer indexed with a constant, a pointer indexed with a non-stack variable,
an array indexed with a constant, an array indexed with a non-stack variable,
@ -190,22 +192,22 @@ An expression of form `a[f()] += b` may call `f` an undefined number of times.
* `+=`, `+'=`, `|=`, `^=`, `&=`: modification in place
`mutable byte += byte`
`mutable word += word`
`mutable long += long`
`mutable trivial long += long`
* `<<=`, `>>=`: shift in place
`mutable byte <<= byte`
`mutable word <<= byte`
`mutable long <<= byte`
`mutable trivial long <<= byte`
* `<<'=`, `>>'=`: decimal shift in place
`mutable byte <<'= constant byte`
`mutable word <<'= constant byte`
`mutable long <<'= constant byte`
`mutable trivial long <<'= constant byte`
* `-=`, `-'=`: subtraction in place
`mutable byte -= byte`
`mutable word -= simple word`
`mutable long -= simple long`
`mutable trivial long -= simple long`
* `*=`: multiplication in place
`mutable byte *= constant byte`