6868
6969 </ head >
7070 < body >
71- < header data-kunai-mdinfo ="{"meta": {"header": ["debugging"], "namespace": ["std"], "id-type": ["function"], "cpp": ["cpp26"]}, "sources": [{"id": "d95de9862b96977a0e6daa49e817963ce867bbec", "source": "#include <print>\n#include <debugging>\n#include <cmath>\n\n// \u306a\u3093\u3089\u304b\u306e\u51e6\u7406\ndouble g(double a, double b) {\n return a / b;\n}\n\ndouble f(double a, double b) {\n double ret = g(a, b);\n if (std::isnan(ret)) {\n // \u6f14\u7b97\u7d50\u679c\u3067NaN\u304c\u767a\u751f\u3057\u305f\u3089\u30d6\u30ec\u30fc\u30af\u3057\u3001\n // \u30c7\u30d0\u30c3\u30ac\u3067\u30d1\u30e9\u30e1\u30fc\u30bf (\u30ed\u30fc\u30ab\u30eb\u5909\u6570) \u306a\u3069\u3092\u78ba\u8a8d\u3059\u308b\n std::breakpoint_if_debugging();\n }\n}\n\nint main() {\n double ret = f(2.0, 0.0);\n std::println(\"{}\", ret);\n}\n"}], "page_id": ["reference", "debugging", "breakpoint_if_debugging"]} ">
71+ < header data-kunai-mdinfo ="{"meta": {"header": ["debugging"], "namespace": ["std"], "id-type": ["function"], "cpp": ["cpp26"]}, "sources": [{"id": "cdfd92c5191af3d6478f8eb1a7962d801ab47948", "source": "#include <print>\n#include <debugging>\n#include <cmath>\n\n// \u306a\u3093\u3089\u304b\u306e\u51e6\u7406\ndouble g(double a, double b) {\n return a / b;\n}\n\ndouble f(double a, double b) {\n double ret = g(a, b);\n if (std::isnan(ret) || std::isinf(ret)) {\n // \u6f14\u7b97\u7d50\u679c\u3067NaN\u304binf\u304c\u767a\u751f\u3057\u305f\u3089\u30d6\u30ec\u30fc\u30af\u3057\u3001\n // \u30c7\u30d0\u30c3\u30ac\u3067\u30d1\u30e9\u30e1\u30fc\u30bf (\u30ed\u30fc\u30ab\u30eb\u5909\u6570) \u306a\u3069\u3092\u78ba\u8a8d\u3059\u308b\n std::breakpoint_if_debugging();\n }\n return ret;\n}\n\nint main() {\n double ret = f(2.0, 0.0);\n std::println(\"{}\", ret);\n}\n"}], "page_id": ["reference", "debugging", "breakpoint_if_debugging"]} ">
7272 < nav class ="navbar navbar-default " role ="navigation ">
7373 < div class ="container-fluid ">
7474 < div class ="navbar-header ">
188188
189189 < p class ="text-right "> < small >
190190 最終更新日時(UTC):
191- < span itemprop ="datePublished " content ="2024-09-18T03:36:29 ">
192- 2024年09月18日 03時36分29秒
191+ < span itemprop ="datePublished " content ="2024-09-18T04:13:25 ">
192+ 2024年09月18日 04時13分25秒
193193 </ span >
194194 < br />
195195 < span itemprop ="author " itemscope itemtype ="http://schema.org/Person ">
@@ -235,7 +235,7 @@ <h2>備考</h2>
235235< li > 実装としては、生成されるコードがプラットフォームに対して可能な限り最小になるように最適化することが期待される。例として、x86ターゲット環境ではINT3命令をひとつだけ生成することが期待される</ li >
236236</ ul >
237237< h2 > 例</ h2 >
238- < p > < div class ="yata " id ="d95de9862b96977a0e6daa49e817963ce867bbec "> < div class ="codehilite "> < pre > < span > </ span > < code > < span class ="cp "> #include</ span > < span class ="cpf "> < a href ="../print.html "> <print></ a > </ span > < span class ="cp "> </ span >
238+ < p > < div class ="yata " id ="cdfd92c5191af3d6478f8eb1a7962d801ab47948 "> < div class ="codehilite "> < pre > < span > </ span > < code > < span class ="cp "> #include</ span > < span class ="cpf "> < a href ="../print.html "> <print></ a > </ span > < span class ="cp "> </ span >
239239< span class ="cp "> #include</ span > < span class ="cpf "> < a href ="../debugging.html "> <debugging></ a > </ span > < span class ="cp "> </ span >
240240< span class ="cp "> #include</ span > < span class ="cpf "> < a href ="../cmath.html "> <cmath></ a > </ span > < span class ="cp "> </ span >
241241
@@ -246,11 +246,12 @@ <h2>例</h2>
246246
247247< span class ="kt "> double</ span > < span class ="nf "> f</ span > < span class ="p "> (</ span > < span class ="kt "> double</ span > < span class ="n "> a</ span > < span class ="p "> ,</ span > < span class ="kt "> double</ span > < span class ="n "> b</ span > < span class ="p "> )</ span > < span class ="p "> {</ span >
248248 < span class ="kt "> double</ span > < span class ="n "> ret</ span > < span class ="o "> =</ span > < span class ="n "> g</ span > < span class ="p "> (</ span > < span class ="n "> a</ span > < span class ="p "> ,</ span > < span class ="n "> b</ span > < span class ="p "> );</ span >
249- < span class ="k "> if</ span > < span class ="p "> (</ span > < span class ="n "> < a href ="../cmath/isnan.html "> std::isnan</ a > </ span > < span class ="p "> (</ span > < span class ="n "> ret</ span > < span class ="p "> ))</ span > < span class ="p "> {</ span >
250- < span class ="c1 "> // 演算結果でNaNが発生したらブレークし 、</ span >
249+ < span class ="k "> if</ span > < span class ="p "> (</ span > < span class ="n "> < a href ="../cmath/isnan.html "> std::isnan</ a > </ span > < span class ="p "> (</ span > < span class ="n "> ret</ span > < span class ="p "> )</ span > < span class =" o " > || </ span > < span class =" n " > < a href =" ../cmath/isinf.html " > std::isinf </ a > </ span > < span class =" p " > ( </ span > < span class =" n " > ret </ span > < span class =" p " > ) )</ span > < span class ="p "> {</ span >
250+ < span class ="c1 "> // 演算結果でNaNかinfが発生したらブレークし 、</ span >
251251 < span class ="c1 "> // デバッガでパラメータ (ローカル変数) などを確認する</ span >
252252 < span class ="n "> < span style ="color:#ff0000 "> std::breakpoint_if_debugging</ span > </ span > < span class ="p "> ();</ span >
253253 < span class ="p "> }</ span >
254+ < span class ="k "> return</ span > < span class ="n "> ret</ span > < span class ="p "> ;</ span >
254255< span class ="p "> }</ span >
255256
256257< span class ="kt "> int</ span > < span class ="nf "> main</ span > < span class ="p "> ()</ span > < span class ="p "> {</ span >
@@ -259,8 +260,9 @@ <h2>例</h2>
259260< span class ="p "> }</ span >
260261</ code > </ pre > </ div >
261262</ div > </ p >
262- < h3 > 出力</ h3 >
263- < p > < pre > < code > </ code > </ pre > </ p >
263+ < h3 > 出力例</ h3 >
264+ < p > < pre > < code > inf
265+ </ code > </ pre > </ p >
264266< h2 > バージョン</ h2 >
265267< h3 > 言語</ h3 >
266268< ul >
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