Updated MSRV for param attrs usage

Author: TheDan64

.travis.yml

@@ -60,7 +60,7 @@ matrix:
           packages:
             - *BASE_PACKAGES
             - llvm-3.6-dev
-      rust: 1.38.0
+      rust: 1.39.0
       dist: trusty
     - env:
         - LLVM_VERSION="3.7"
@@ -73,7 +73,7 @@ matrix:
           packages:
             - *BASE_PACKAGES
             - llvm-3.7-dev
-      rust: 1.38.0
+      rust: 1.39.0
       dist: trusty
     - env:
         - LLVM_VERSION="3.8"
@@ -86,7 +86,7 @@ matrix:
           packages:
             - *BASE_PACKAGES
             - llvm-3.8-dev
-      rust: 1.38.0
+      rust: 1.39.0
       dist: trusty
     # 3.9 seems to have a linking issue :/
     # - env:
@@ -100,7 +100,7 @@ matrix:
     #       packages:
     #         - *BASE_PACKAGES
     #         - llvm-3.9-dev
-    #       rust: 1.38.0
+    #       rust: 1.39.0
     #       dist: trusty
     - env:
         - LLVM_VERSION="4.0"
@@ -113,7 +113,7 @@ matrix:
           packages:
             - *BASE_PACKAGES
             - llvm-4.0-dev
-      rust: 1.38.0
+      rust: 1.39.0
       dist: trusty
     - env:
         - LLVM_VERSION="5.0"
@@ -126,7 +126,7 @@ matrix:
           packages:
             - *BASE_PACKAGES
             - llvm-5.0-dev
-      rust: 1.38.0
+      rust: 1.39.0
       dist: trusty
     - env:
         - LLVM_VERSION="6.0"
@@ -139,7 +139,7 @@ matrix:
           packages:
             - *BASE_PACKAGES
             - llvm-6.0-dev
-      rust: 1.38.0
+      rust: 1.39.0
       dist: trusty
     - env:
         - LLVM_VERSION="7.0"
@@ -152,7 +152,7 @@ matrix:
           packages:
             - *BASE_PACKAGES
             - llvm-7-dev
-      rust: 1.38.0
+      rust: 1.39.0
       dist: trusty
     - env:
         - LLVM_VERSION="8.0"
@@ -165,7 +165,7 @@ matrix:
           packages:
             - *BASE_PACKAGES
             - llvm-8-dev
-      rust: 1.38.0
+      rust: 1.39.0
       dist: trusty
     - env:
         - LLVM_VERSION="9.0"
@@ -180,7 +180,7 @@ matrix:
           packages:
             - *BASE_PACKAGES
             - llvm-9-dev
-      rust: 1.38.0
+      rust: 1.39.0
       dist: bionic
     - env:
         - LLVM_VERSION="10.0"
@@ -195,7 +195,7 @@ matrix:
           packages:
             - *BASE_PACKAGES
             - llvm-10-dev
-      rust: 1.38.0
+      rust: 1.39.0
       dist: bionic
     - deploy: # Documentation build; Only latest supported LLVM version for now
         provider: pages
@@ -250,7 +250,7 @@ env:
     - RUSTFLAGS="-C link-dead-code -C target-cpu=native -l ffi"
 
 after_success: |
-  if [[ "$TRAVIS_RUST_VERSION" == 1.38.0 ]]; then
+  if [[ "$TRAVIS_RUST_VERSION" == 1.39.0 ]]; then
     cargo tarpaulin --features "llvm${LLVM_VERSION_DASH}" --out Xml
     bash <(curl -s https://codecov.io/bash)
   fi

README.md

@@ -5,15 +5,15 @@
 [![codecov](https://codecov.io/gh/TheDan64/inkwell/branch/master/graph/badge.svg)](https://codecov.io/gh/TheDan64/inkwell)
 [![lines of code](https://tokei.rs/b1/github/TheDan64/inkwell)](https://github.com/Aaronepower/tokei)
 [![Join the chat at https://gitter.im/inkwell-rs/Lobby](https://badges.gitter.im/inkwell-rs/Lobby.svg)](https://gitter.im/inkwell-rs/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-![Minimum rustc 1.36](https://img.shields.io/badge/rustc-1.36+-brightgreen.svg)
+![Minimum rustc 1.39](https://img.shields.io/badge/rustc-1.39+-brightgreen.svg)
 
 **I**t's a **N**ew **K**ind of **W**rapper for **E**xposing **LL**VM (*S*afely)
 
 Inkwell aims to help you pen your own programming languages by safely wrapping llvm-sys. It provides a more strongly typed interface than the underlying LLVM API so that certain types of errors can be caught at compile time instead of at LLVM's runtime. This means we are trying to replicate LLVM IR's strong typing as closely as possible. The ultimate goal is to make LLVM safer from the rust end and a bit easier to learn (via documentation) and use.
 
 ## Requirements
 
-* Rust 1.36+
+* Rust 1.39+
 * Rust Stable, Beta, or Nightly
 * LLVM 3.6, 3.7, 3.8, 3.9, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, or 10.0
 

src/lib.rs

@@ -310,7 +310,7 @@ pub enum OptimizationLevel {
     None       = 0,
     Less       = 1,
     Default    = 2,
-    Aggressive = 3
+    Aggressive = 3,
 }
 
 impl Default for OptimizationLevel {