initial commit

based: https://github.com/ktanaka101/monkey.rs v0.2(4fd5376)

.editorconfig

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+root = true
+
+[*.rs]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 4
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false

.github/workflows/rust.yml

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+name: Rust
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - uses: actions/cache@v2
+      with:
+        path: |
+          ~/.cargo/registry
+          ~/.cargo/git
+          target
+        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+
+    - name: Select nightly
+      run: rustup default nightly
+
+    - name: Build
+      run: cargo build --verbose
+
+    - name: Run tests
+      run: cargo test --verbose

.gitignore

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+/target
+**/*.rs.bk
+.vscode

Cargo.toml

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+[package]
+name = "nail"
+version = "0.1.0"
+authors = ["ktanaka101 <[email protected]>"]
+edition = "2018"
+license = "MIT"
+
+[dependencies]
+anyhow = "1.0"
+thiserror = "1.0"

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2020 ktanaka101
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

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+# Nail
+
+## Summury
+
+Nail is a programming language for me.
+
+## Supports
+
+- [ ] Lexer
+- [ ] Parser
+- [ ] Evaluator
+- [ ] Compiler
+- [ ] VM
+- [ ] REPL
+- [ ] Test case
+- [ ] Evaluator and VM benchmarks
+- [x] Not use `unsafe`
+
+## Contributors
+
+- [ktanaka101](https://github.com/ktanaka101) - creator, maintainer
+
+## License
+
+MIT