18 lines
845 B
C++
18 lines
845 B
C++
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// RUN: %clang_cc1 -std=c++1y -fsyntax-only -verify %s -DMAX=1234 -fconstexpr-steps 1234
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// RUN: %clang_cc1 -std=c++1y -fsyntax-only -verify %s -DMAX=10 -fconstexpr-steps 10
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// RUN: %clang -std=c++1y -fsyntax-only -Xclang -verify %s -DMAX=12345 -fconstexpr-steps=12345
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// This takes a total of n + 4 steps according to our current rules:
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// - One for the compound-statement that is the function body
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// - One for the 'for' statement
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// - One for the 'int k = 0;' statement
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// - One for each of the n evaluations of the compound-statement in the 'for' body
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// - One for the 'return' statemnet
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constexpr bool steps(int n) {
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for (int k = 0; k != n; ++k) {}
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return true; // expected-note {{step limit}}
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}
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static_assert(steps((MAX - 4)), ""); // ok
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static_assert(steps((MAX - 3)), ""); // expected-error {{constant}} expected-note{{call}}
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