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update docs for @TypeOf

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Andrew Kelley 2020-03-04 18:05:14 -05:00
parent 3e3d464884
commit 116e2a93f1
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doc/langref.html.in
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@ -8371,12 +8371,14 @@ test "integer truncation" {
{#header_close#}
{#header_open|@TypeOf#}
<pre>{#syntax#}@TypeOf(expression) type{#endsyntax#}</pre>
<pre>{#syntax#}@TypeOf(...) type{#endsyntax#}</pre>
<p>
This function returns a compile-time constant, which is the type of the
expression passed as an argument. The expression is evaluated.
{#syntax#}@TypeOf{#endsyntax#} is a special builtin function that takes any (nonzero) number of expressions
as parameters and returns the type of the result, using {#link|Peer Type Resolution#}.
</p>
<p>
The expressions are evaluated, however they are guaranteed to have no <em>runtime</em> side-effects:
</p>
<p>{#syntax#}@TypeOf{#endsyntax#} guarantees no run-time side-effects within the expression:</p>
{#code_begin|test#}
const std = @import("std");
const assert = std.debug.assert;