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view tests/mini/funcptr.d @ 1499:df11cdec45a2
Another shot at fixing the issues with (constant) struct literals and their addresses. See DMD2682, #218, #324.
The idea is to separate the notion of const from 'this variable can always be
replaced with its initializer' in the frontend. To do that, I introduced
Declaration::isSameAsInitializer, which is overridden in VarDeclaration to
return false for constants that have a struct literal initializer.
So
{{{
const S s = S(5);
void foo() { auto ps = &s; }
// is no longer replaced by
void foo() { auto ps = &(S(5)); }
}}}
To make taking the address of a struct constant with a struct-initializer
outside of function scope possible, I made sure that AddrExp::optimize doesn't
try to run the argument's optimization with WANTinterpret - that'd again
replace the constant with a struct literal temporary.
author | Christian Kamm <kamm incasoftware de> |
---|---|
date | Sun, 14 Jun 2009 19:49:58 +0200 |
parents | 1bb99290e03a |
children |
line wrap: on
line source
extern(C) int printf(char*, ...); int return_six() { return 6; } int add_int(int a, int b) { return a+b; } int sub_int(int a, int b) { return a-b; } alias int function(int,int) binfn_t; int binop_int(binfn_t op, int a, int b) { return op(a,b); } binfn_t get_binop_int(char op) { binfn_t fn; if (op == '+') fn = &add_int; else if (op == '-') fn = &sub_int; return fn; } extern(C) float mul_float(float a, float b) { return a * b; } void function_pointers() { int function() fn = &return_six; assert(fn() == 6); binfn_t binfn = &add_int; assert(binfn(4,1045) == 1049); assert(binop_int(binfn, 10,656) == 666); binfn = get_binop_int('+'); assert(binop_int(binfn, 10,100) == 110); binfn = get_binop_int('-'); assert(binop_int(binfn, 10,100) == -90); { auto ffn = &mul_float; float ftmp = mul_float(2.5,5); assert(ftmp == 12.5); assert(ftmp > 12.49 && ftmp < 12.51); } } void main() { printf("Function pointer test\n"); function_pointers(); printf(" SUCCESS\n"); }