c2db077574
Previously, std.debug.assert would `@panic` in test builds, if the assertion failed. Now, it's always `unreachable`. This makes release mode test builds more accurately test the actual code that will be run. However this requires tests to call `std.testing.expect` rather than `std.debug.assert` to make sure output is correct. Here is the explanation of when to use either one, copied from the assert doc comments: Inside a test block, it is best to use the `std.testing` module rather than assert, because assert may not detect a test failure in ReleaseFast and ReleaseSafe mode. Outside of a test block, assert is the correct function to use. closes #1304
107 lines
2.9 KiB
Zig
107 lines
2.9 KiB
Zig
const std = @import("../index.zig");
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const math = std.math;
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const expect = std.testing.expect;
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const maxInt = std.math.maxInt;
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pub fn isInf(x: var) bool {
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const T = @typeOf(x);
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switch (T) {
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f16 => {
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const bits = @bitCast(u16, x);
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return bits & 0x7FFF == 0x7C00;
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},
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f32 => {
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const bits = @bitCast(u32, x);
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return bits & 0x7FFFFFFF == 0x7F800000;
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},
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f64 => {
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const bits = @bitCast(u64, x);
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return bits & (maxInt(u64) >> 1) == (0x7FF << 52);
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},
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else => {
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@compileError("isInf not implemented for " ++ @typeName(T));
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},
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}
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}
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pub fn isPositiveInf(x: var) bool {
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const T = @typeOf(x);
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switch (T) {
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f16 => {
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return @bitCast(u16, x) == 0x7C00;
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},
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f32 => {
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return @bitCast(u32, x) == 0x7F800000;
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},
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f64 => {
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return @bitCast(u64, x) == 0x7FF << 52;
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},
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else => {
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@compileError("isPositiveInf not implemented for " ++ @typeName(T));
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},
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}
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}
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pub fn isNegativeInf(x: var) bool {
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const T = @typeOf(x);
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switch (T) {
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f16 => {
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return @bitCast(u16, x) == 0xFC00;
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},
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f32 => {
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return @bitCast(u32, x) == 0xFF800000;
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},
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f64 => {
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return @bitCast(u64, x) == 0xFFF << 52;
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},
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else => {
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@compileError("isNegativeInf not implemented for " ++ @typeName(T));
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},
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}
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}
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test "math.isInf" {
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expect(!isInf(f16(0.0)));
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expect(!isInf(f16(-0.0)));
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expect(!isInf(f32(0.0)));
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expect(!isInf(f32(-0.0)));
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expect(!isInf(f64(0.0)));
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expect(!isInf(f64(-0.0)));
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expect(isInf(math.inf(f16)));
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expect(isInf(-math.inf(f16)));
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expect(isInf(math.inf(f32)));
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expect(isInf(-math.inf(f32)));
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expect(isInf(math.inf(f64)));
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expect(isInf(-math.inf(f64)));
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}
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test "math.isPositiveInf" {
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expect(!isPositiveInf(f16(0.0)));
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expect(!isPositiveInf(f16(-0.0)));
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expect(!isPositiveInf(f32(0.0)));
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expect(!isPositiveInf(f32(-0.0)));
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expect(!isPositiveInf(f64(0.0)));
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expect(!isPositiveInf(f64(-0.0)));
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expect(isPositiveInf(math.inf(f16)));
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expect(!isPositiveInf(-math.inf(f16)));
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expect(isPositiveInf(math.inf(f32)));
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expect(!isPositiveInf(-math.inf(f32)));
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expect(isPositiveInf(math.inf(f64)));
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expect(!isPositiveInf(-math.inf(f64)));
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}
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test "math.isNegativeInf" {
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expect(!isNegativeInf(f16(0.0)));
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expect(!isNegativeInf(f16(-0.0)));
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expect(!isNegativeInf(f32(0.0)));
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expect(!isNegativeInf(f32(-0.0)));
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expect(!isNegativeInf(f64(0.0)));
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expect(!isNegativeInf(f64(-0.0)));
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expect(!isNegativeInf(math.inf(f16)));
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expect(isNegativeInf(-math.inf(f16)));
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expect(!isNegativeInf(math.inf(f32)));
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expect(isNegativeInf(-math.inf(f32)));
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expect(!isNegativeInf(math.inf(f64)));
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expect(isNegativeInf(-math.inf(f64)));
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}
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