forked from OSchip/llvm-project
47 lines
2.6 KiB
C++
47 lines
2.6 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -Wliteral-conversion -verify %s
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void foo(int y);
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// Warn when a literal float or double is assigned or bound to an integer.
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void test0() {
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// Float
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int y0 = 1.2222F; // expected-warning {{implicit conversion turns literal floating-point number into integer}}
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int y1 = (1.2222F); // expected-warning {{implicit conversion turns literal floating-point number into integer}}
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int y2 = (((1.2222F))); // expected-warning {{implicit conversion turns literal floating-point number into integer}}
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int y3 = 12E1F; // expected-warning {{implicit conversion turns literal floating-point number into integer}} \
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// expected-note {{this can be rewritten as an integer literal with the exact same value}}
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int y4 = 1.2E1F; // expected-warning {{implicit conversion turns literal floating-point number into integer}} \
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// expected-note {{this can be rewritten as an integer literal with the exact same value}}
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// Double
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int y5 = 1.2222; // expected-warning {{implicit conversion turns literal floating-point number into integer}}
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int y6 = 12E1; // expected-warning {{implicit conversion turns literal floating-point number into integer}} \
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// expected-note {{this can be rewritten as an integer literal with the exact same value}}
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int y7 = 1.2E1; // expected-warning {{implicit conversion turns literal floating-point number into integer}} \
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// expected-note {{this can be rewritten as an integer literal with the exact same value}}
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int y8 = (1.2E1); // expected-warning {{implicit conversion turns literal floating-point number into integer}} \
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// expected-note {{this can be rewritten as an integer literal with the exact same value}}
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// Test assignment to an existing variable.
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y8 = 2.22F; // expected-warning {{implicit conversion turns literal floating-point number into integer}}
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// Test direct initialization.
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int y9(1.23F); // expected-warning {{implicit conversion turns literal floating-point number into integer}}
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// Test passing a literal floating-point value to a function that takes an integer.
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foo(1.2F); // expected-warning {{implicit conversion turns literal floating-point number into integer}}
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// FIXME: -Wconversion-literal doesn't catch "-1.2F".
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int y10 = -1.2F;
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// -Wconversion-literal does NOT catch const values.
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// (-Wconversion DOES catch them.)
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static const float sales_tax_rate = .095F;
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int z = sales_tax_rate;
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foo(sales_tax_rate);
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// Expressions, such as those that indicate rounding-down, should NOT produce warnings.
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int x = 24 * 0.5;
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int y = (24*60*60) * 0.25;
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int pennies = 123.45 * 100;
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}
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