Library Reference

version 2.112.0

Internal API

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rt.aApply

This code handles decoding UTF strings for foreach loops.

License:

Boost License 1.0.

Authors:

Walter Bright

Sourcert/aApply.d

aliasdg_t = int delegate(void* c);

Delegate type corresponding to transformed loop body

The parameter is a pointer to the currentchar,wchar ordchar

Returns:

non-zero when abreak statement is hit

int_aApplycd1(scope const(char)[]aa, dg_tdg); int_aApplywd1(scope const(wchar)[]aa, dg_tdg); int_aApplycw1(scope const(char)[]aa, dg_tdg); int_aApplywc1(scope const(wchar)[]aa, dg_tdg); int_aApplydc1(scope const(dchar)[]aa, dg_tdg); int_aApplydw1(scope const(dchar)[]aa, dg_tdg);

Loop over a string while changing the UTF encoding

There are 6 combinations of conversions betweenchar,wchar, anddchar,and 2 of each of those.

The naming convention is as follows:

aApply{c,d,w}{c,d,w}{1,2}

The first letter corresponds to the input string encoding, and the second letter corresponds to the target character type.

c =char
w =wchar
d =dchar

The1 variant only produces the character, the2 variant also produces a loop index.

Examples:

void main(){    string str;    wtring wstr;    dstring dstr;foreach (dchar c; str) {}// _aApplycd1foreach (wchar c; dstr) {}// _aApplydw1foreach (i,wchar c; str) {}// _aApplycw2foreach (wchar w; wstr) {}// no conversion}

Parameters:

const(char)[]`aa`	input string
dg_t`dg`	foreach body transformed into a delegate, similar toopApply

Returns:

non-zero when the loop was exited through abreak

aliasdg2_t = int delegate(void* i, void* c);

Delegate type corresponding to transformed loop body

Parameters are pointers to asize_t loop index, and the currentchar,wchar ordchar.

Returns:

non-zero when abreak statement is hit

int_aApplycd2(scope const(char)[]aa, dg2_tdg); int_aApplywd2(scope const(wchar)[]aa, dg2_tdg); int_aApplycw2(scope const(char)[]aa, dg2_tdg); int_aApplywc2(scope const(wchar)[]aa, dg2_tdg); int_aApplydc2(scope const(dchar)[]aa, dg2_tdg); int_aApplydw2(scope const(dchar)[]aa, dg2_tdg);

Variants of aApplyXXX that include a loop index.

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Library Reference

rt.aApply