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Improve description of Julia keywords #29229

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Sep 21, 2018
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Improve description of Julia keywords #29229

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Improve description of Julia keywords
bkamins Sep 17, 2018
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improve description of where, is and isa
bkamins Sep 18, 2018
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17 changes: 17 additions & 0 deletions doc/src/base/base.md
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Expand Up @@ -37,6 +37,22 @@ ans

## Keywords

This is the list of reserved keywords in Julia:
`baremodule`, `begin`, `break`, `catch`, `const`, `continue`, `do`,
`else`, `elseif`, `end`, `export`, `false`, `finally`, `for`, `function`,
`global`, `if`, `import`, `let`, `local`, `macro`, `module`, `quote`,
`return`, `struct`, `true`, `try`, `using`, `while`.
Those keywords are not allowed to be used as variable names.

The following two word sequences are reserved:
`abstract type`, `mutable struct`, `primitive type`.
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@PallHaraldsson PallHaraldsson Oct 3, 2018 •
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three word sequences, or "two-word" sequences

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It is better to just open a new PR with the suggested changes instead of commenting on old merged PRs.

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Thank you. I will make a PR to clarify it.

However, you can create variables with names:
`abstract`, `mutable`, `primitive` and `type`.

Finally `where` is parsed as an infix operator for writing parametric method
and type definitions. Also `in` and `isa` are parsed as infix operators.
Creation of variable named `where`, `is` or `isa` is allowed though.

```@docs
module
export
Expand Down Expand Up @@ -65,6 +81,7 @@ struct
mutable struct
abstract type
primitive type
where
...
;
```
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