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langref: document out of bounds float to integer cast

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Evin Yulo 2023-07-21 09:17:58 -04:00 committed by Andrew Kelley
parent aea29afc44
commit f1bd598768
1 changed files with 20 additions and 1 deletions
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doc/langref.html.in
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@ -10387,7 +10387,26 @@ fn bar(f: *Foo) void {
{#header_close#}
{#header_open|Out of Bounds Float to Integer Cast#}
<p>TODO</p>
<p>
This happens when casting a float to an integer where the float has a value outside the
integer type's range.
</p>
<p>At compile-time:</p>
{#code_begin|test_err|test_comptime_out_of_bounds_float_to_integer_cast|float value '4294967296' cannot be stored in integer type 'i32'#}
comptime {
const float: f32 = 4294967296;
const int: i32 = @intFromFloat(float);
_ = int;
}
{#code_end#}
<p>At runtime:</p>
{#code_begin|exe_err|runtime_out_of_bounds_float_to_integer_cast#}
pub fn main() void {
var float: f32 = 4294967296;
var int: i32 = @intFromFloat(float);
_ = int;
}
{#code_end#}
{#header_close#}
{#header_open|Pointer Cast Invalid Null#}