https://github.com/elton2048/glizp

Lisp interpreter in zig; Learning purpose mainly
https://github.com/elton2048/glizp

learning lisp zig

Last synced: 10 days ago
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Lisp interpreter in zig; Learning purpose mainly

• Host: GitHub
• URL: https://github.com/elton2048/glizp
• Owner: elton2048
• Created: 2024-08-07T07:00:38.000Z (6 months ago)
• Default Branch: main
• Last Pushed: 2024-10-18T07:17:28.000Z (4 months ago)
• Last Synced: 2024-10-19T14:29:26.180Z (4 months ago)
• Topics: learning, lisp, zig
• Language: Zig
• Homepage:
• Size: 47.9 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 2
• Metadata Files:
  • Readme: README.md

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README

        
# Lisp Interpreter in zig

Build script

```sh

zig build

```

# Note

Zig requires manual memory management, some memory are required to be freed for better main program and test cases, noticeably the following items

- ArrayList (by `arrayList.deinit()`)

- Slice from ArrayList (Could be `allocator.free(SLICE)`, by then the array list is not required to be freed. If it is not wrapped in allocator some manual way shall be used.)

# Patch note

The [regex library](https://github.com/tiehuis/zig-regex) used requires patch in order to support non-capturing group for tokenization process. Please refer to https://github.com/elton2048/zig-regex/tree/feat-complex-group-support

Another fix for allowing repeat tokens shows as follow:

In `src/regex.zig`

```

    pub fn isByteClass(re: *const Expr) bool {

        switch (re.*) {

            .Literal,

            .ByteClass,

            .AnyCharNotNL,

            // TODO: Don't keep capture here, but allow on repeat operators.

            .Capture,

+           .Repeat,

            => return true,

            else => return false,

        }

    }

```