mirror of
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Even better conversion impl.
This commit is contained in:
parent
af8468315d
commit
71bd7f15ee
52
Cargo.lock
generated
52
Cargo.lock
generated
@ -145,7 +145,7 @@ version = "0.3.40"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"backtrace-sys 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
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"rustc-demangle 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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@ -193,7 +193,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"cexpr 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"clang-sys 0.28.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"peeking_take_while 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -335,7 +335,7 @@ dependencies = [
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[[package]]
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name = "cfg-if"
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version = "0.1.9"
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version = "0.1.10"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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@ -585,7 +585,7 @@ name = "crc32fast"
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version = "1.2.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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@ -626,7 +626,7 @@ name = "crossbeam"
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version = "0.7.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"crossbeam-channel 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"crossbeam-deque 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
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"crossbeam-epoch 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -657,7 +657,7 @@ version = "0.7.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"arrayvec 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"memoffset 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -670,7 +670,7 @@ version = "0.8.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"crossbeam-utils 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"memoffset 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -698,7 +698,7 @@ name = "crossbeam-utils"
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version = "0.6.6"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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@ -708,7 +708,7 @@ version = "0.7.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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@ -765,7 +765,7 @@ name = "directories"
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version = "2.0.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"dirs-sys 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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@ -784,7 +784,7 @@ name = "dirs-sys"
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version = "0.3.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
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"redox_users 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -906,7 +906,7 @@ name = "filetime"
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version = "0.2.8"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
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"redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
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"winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -1042,7 +1042,7 @@ name = "getrandom"
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version = "0.1.13"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
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"wasi 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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@ -1552,7 +1552,7 @@ name = "log"
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version = "0.4.8"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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@ -1671,10 +1671,10 @@ dependencies = [
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[[package]]
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name = "mio"
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version = "0.6.20"
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version = "0.6.21"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
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"fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
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"iovec 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -1694,7 +1694,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"lazycell 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
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"mio 0.6.20 (registry+https://github.com/rust-lang/crates.io-index)",
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"mio 0.6.21 (registry+https://github.com/rust-lang/crates.io-index)",
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"slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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@ -1747,7 +1747,7 @@ name = "net2"
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version = "0.2.33"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
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"winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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@ -1759,7 +1759,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"cc 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
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"void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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@ -1801,7 +1801,7 @@ dependencies = [
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"inotify 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
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"mio 0.6.20 (registry+https://github.com/rust-lang/crates.io-index)",
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"mio 0.6.21 (registry+https://github.com/rust-lang/crates.io-index)",
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"mio-extras 2.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
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"walkdir 2.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -2041,7 +2041,7 @@ name = "parking_lot_core"
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version = "0.6.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
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"redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -2210,7 +2210,7 @@ name = "prometheus"
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version = "0.7.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"protobuf 2.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -2684,7 +2684,7 @@ name = "sdl2-sys"
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version = "0.32.6"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
|
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"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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@ -3187,7 +3187,7 @@ dependencies = [
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"lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
|
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"lz4-compress 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
|
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"mio 0.6.20 (registry+https://github.com/rust-lang/crates.io-index)",
|
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"mio 0.6.21 (registry+https://github.com/rust-lang/crates.io-index)",
|
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"mio-extras 2.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
|
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"notify 5.0.0-pre.1 (registry+https://github.com/rust-lang/crates.io-index)",
|
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"parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -3607,7 +3607,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
|
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"checksum cast 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "4b9434b9a5aa1450faa3f9cb14ea0e8c53bb5d2b3c1bfd1ab4fc03e9f33fbfb0"
|
||||
"checksum cc 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)" = "aa87058dce70a3ff5621797f1506cb837edd02ac4c0ae642b4542dce802908b8"
|
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"checksum cexpr 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "fce5b5fb86b0c57c20c834c1b412fd09c77c8a59b9473f86272709e78874cd1d"
|
||||
"checksum cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "b486ce3ccf7ffd79fdeb678eac06a9e6c09fc88d33836340becb8fffe87c5e33"
|
||||
"checksum cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
|
||||
"checksum cgl 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "55e7ec0b74fe5897894cbc207092c577e87c52f8a59e8ca8d97ef37551f60a49"
|
||||
"checksum chashmap 2.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "ff41a3c2c1e39921b9003de14bf0439c7b63a9039637c291e1a64925d8ddfa45"
|
||||
"checksum chrono 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)" = "31850b4a4d6bae316f7a09e691c944c28299298837edc0a03f755618c23cbc01"
|
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@ -3752,7 +3752,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
"checksum minifb 0.13.0 (git+https://github.com/emoon/rust_minifb.git)" = "<none>"
|
||||
"checksum minimp3 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "542e9bed56860c5070a09939eee0e2df6f8f73f60304ddf56d620947e7017239"
|
||||
"checksum minimp3-sys 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c109ae05c00ad6e3a53fab101e2f234545bdd010f0fffd399355efaf70817817"
|
||||
"checksum mio 0.6.20 (registry+https://github.com/rust-lang/crates.io-index)" = "72f4261ee7ab03cd36dc99eea4db8be6e83e4164da470e0c84f6726d6c605855"
|
||||
"checksum mio 0.6.21 (registry+https://github.com/rust-lang/crates.io-index)" = "302dec22bcf6bae6dfb69c647187f4b4d0fb6f535521f7bc022430ce8e12008f"
|
||||
"checksum mio-extras 2.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "46e73a04c2fa6250b8d802134d56d554a9ec2922bf977777c805ea5def61ce40"
|
||||
"checksum miow 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8c1f2f3b1cf331de6896aabf6e9d55dca90356cc9960cca7eaaf408a355ae919"
|
||||
"checksum mopa 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a785740271256c230f57462d3b83e52f998433a7062fc18f96d5999474a9f915"
|
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|
@ -7,74 +7,16 @@ lazy_static::lazy_static! {
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|
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use vek::{Mat3, Rgb, Rgba, Vec3};
|
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|
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#[inline(always)]
|
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#[allow(unsafe_code)]
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unsafe fn approx_powf_internal(mut a: f64, b: f64) -> f64 {
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let mut e = b as i32;
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union Swagger {
|
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d: f64,
|
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x: [i32; 2],
|
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}
|
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let mut u = Swagger { d: a };
|
||||
u.x[1] = ((b - e as f64) * (u.x[1] as f64 - 1072632447.0) + 1072632447.0) as i32;
|
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u.x[0] = 0;
|
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let mut r = 1.0_f64;
|
||||
while e > 0 {
|
||||
if e & 1 > 0 {
|
||||
r *= a;
|
||||
}
|
||||
a *= a;
|
||||
e >>= 1;
|
||||
}
|
||||
return r * u.d;
|
||||
}
|
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#[inline(always)]
|
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#[allow(unsafe_code)]
|
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fn approx_powf(a: f32, b: f32) -> f32 {
|
||||
unsafe { approx_powf_internal(a as f64, b as f64) as f32 }
|
||||
}
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|
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#[cfg(test)]
|
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mod approx_powf_tests {
|
||||
fn close_ei(a: f32, b: f32) -> bool {
|
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const ACCEPTABLE_DIFF: f32 = 0.05;
|
||||
(a - b < ACCEPTABLE_DIFF && a - b > 0.0) || (b - a < ACCEPTABLE_DIFF && b - a > 0.0)
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn accuracy_1() {
|
||||
let test_values: Vec<f32> = vec![3.0, 2.5, 1.5, 2.2];
|
||||
test_values.windows(2).for_each(|a| {
|
||||
assert!(close_ei(a[0].powf(a[1]), super::approx_powf(a[0], a[1])));
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
#[inline(always)]
|
||||
pub fn srgb_to_linear(col: Rgb<f32>) -> Rgb<f32> {
|
||||
#[inline(always)]
|
||||
fn to_linear(x: f32) -> f32 {
|
||||
if x <= 0.04045 {
|
||||
x / 12.92
|
||||
} else {
|
||||
approx_powf((x + 0.055) / 1.055, 2.4)
|
||||
}
|
||||
}
|
||||
col.map(to_linear)
|
||||
0.012522878 * col + 0.682171111 * col * col + 0.305306011 * col * col * col
|
||||
}
|
||||
#[inline(always)]
|
||||
pub fn linear_to_srgb(col: Rgb<f32>) -> Rgb<f32> {
|
||||
#[inline(always)]
|
||||
fn to_srgb(x: f32) -> f32 {
|
||||
if x <= 0.0031308 {
|
||||
x * 12.92
|
||||
} else {
|
||||
approx_powf(x, 1.0 / 2.4) * 1.055 - 0.055
|
||||
}
|
||||
}
|
||||
col.map(to_srgb)
|
||||
let s1 = col.sqrt();
|
||||
let s2 = s1.sqrt();
|
||||
let s3 = s2.sqrt();
|
||||
0.585122381 * s1 + 0.783140355 * s2 - 0.368262736 * s3
|
||||
}
|
||||
#[inline(always)]
|
||||
pub fn srgba_to_linear(col: Rgba<f32>) -> Rgba<f32> {
|
||||
|
Loading…
Reference in New Issue
Block a user