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Jun 6, 2025
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Improve CTFE section #4247

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13 changes: 6 additions & 7 deletions spec/function.dd
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Original file line number Diff line number Diff line change
Expand Up @@ -3600,17 +3600,16 @@ void main()
---
)

$(P The function must have a $(GLINK SpecifiedFunctionBody).)
$(P The function must have a $(GLINK FunctionBody).)

$(P CTFE is subject to the following restrictions:)

$(OL
$(LI Expressions may not reference any global or local
static variables.)
$(LI Expressions may not reference any mutable static variables.)

$(LI $(DDSUBLINK spec/iasm, asmstatements, AsmStatements) are not permitted)

$(LI Non-portable casts (eg, from $(D int[]) to $(D float[])), including
$(LI Non-portable casts (e.g., from $(D int[]) to $(D float[])), including
casts which depend on endianness, are not permitted.
Casts between signed and unsigned types are permitted.)

Expand Down Expand Up @@ -3656,7 +3655,7 @@ void main()
)

$(LI
Equality comparisons (==, !=, $(D_KEYWORD is), $(D_KEYWORD !is)) are
Equality comparisons ($(D ==), $(D !=), $(D is), $(D !is)) are
permitted between all pointers, without restriction.
)

Expand All @@ -3668,7 +3667,7 @@ void main()
)

$(P The above restrictions apply only to expressions which are
actually executed. For example:
actually evaluated. For example:
)
---
static int y = 0;
Expand Down Expand Up @@ -3703,7 +3702,7 @@ static assert(countTen(12) == 12); // invalid, modifies y.

$(IMPLEMENTATION_DEFINED
Functions executed via CTFE can give different results
from run time when implementation-defined occurs.
from run time when implementation-defined behavior occurs.
)


Expand Down