Matsuura Tomoya(Windows)
3215e1d36e
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29 lines
927 B
Markdown
29 lines
927 B
Markdown
#programming-language
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[[Rust]]っぽいシンタックスだが、[[Erlang]]の[[BEAM VM]]もしくは[[JavaScript]]をターゲットとして コンパイルされるスクリプティング言語。
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Use構文が面白い。ちょっと[[Computation Expression]]でSeqを使った時とか、[[Koka]]のWith構文と似た仕組みと見える
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[Use - The Gleam Language Tour](https://tour.gleam.run/advanced-features/use/)
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```rust
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pub fn with_use() -> Result(String, Nil) {
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use username <- result.try(get_username())
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use password <- result.try(get_password())
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use greeting <- result.map(log_in(username, password))
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greeting <> ", " <> username
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}
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pub fn without_use() -> Result(String, Nil) {
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result.try(get_username(), fn(username) {
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result.try(get_password(), fn(password) {
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result.map(log_in(username, password), fn(greeting) {
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greeting <> ", " <> username
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})
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})
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})
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}
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```
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