104 lines
2.9 KiB
Markdown
104 lines
2.9 KiB
Markdown
# zlox, a clox rewrite in Zig.
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While reading [Crafting Interpreters](https://craftinginterpreters.com/), after having rewrote the interpreter part in Rust (see [rs-lox](https://github.com/mycroft/rs-lox)), I'm now attempting to write the bytecode compiler in Zig.
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## Progression
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- [x] 14 - Chunks of Bytecode
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- [x] 15 - A Virtual Machine
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- [x] 16 - Scanning on Demand
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- [x] 17 - Compiling Expressions
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- [x] 18 - Types of Values
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- [x] 19 - Strings
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- [x] 20 - Hash Tables
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- [x] 21 - Global Variables
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- [ ] 22 - Local Variables
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- [ ] 23 - Jumping Back and Forth
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- [ ] 24 - Calls and Functions
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- [ ] 25 - Closures
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- [ ] 26 - Garbage Collection
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- [ ] 27 - Classes and Instances
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- [ ] 28 - Method and Initializers
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- [ ] 29 - Superclasses
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- [ ] 30 - Optimization
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## Build & run
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There is a `justfile` to help building & running:
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```sh
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$ just build
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$ ls -l zig-out/bin/zlox
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-rwxr-xr-x 1 mycroft mycroft 2823296 Aug 25 15:36 zig-out/bin/zlox
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$ just run
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zig build run
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> 2*3 + 3*4
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== code ==
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0000 1 OP_CONSTANT 0 '2'
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0002 | OP_CONSTANT 1 '3'
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0004 | OP_MULTIPLY
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0005 | OP_CONSTANT 2 '3'
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0007 | OP_CONSTANT 3 '4'
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0009 | OP_MULTIPLY
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000a | OP_ADD
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== end of code ==
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0000 1 OP_CONSTANT 0 '2'
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[ 2 ]
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0002 | OP_CONSTANT 1 '3'
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[ 2 ][ 3 ]
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0004 | OP_MULTIPLY
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[ 6 ]
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0005 | OP_CONSTANT 2 '3'
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[ 6 ][ 3 ]
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0007 | OP_CONSTANT 3 '4'
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[ 6 ][ 3 ][ 4 ]
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0009 | OP_MULTIPLY
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[ 6 ][ 12 ]
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000a | OP_ADD
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[ 18 ]
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000b 2 OP_RETURN
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18
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> !(5 - 4 > 3 * 2 == !nil)
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== code ==
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0000 1 OP_CONSTANT 0 '5'
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0002 | OP_CONSTANT 1 '4'
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0004 | OP_SUBSTRACT
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0005 | OP_CONSTANT 2 '3'
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0007 | OP_CONSTANT 3 '2'
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0009 | OP_MULTIPLY
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000a | OP_GREATER
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000b | OP_NIL
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000c | OP_NOT
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000d | OP_EQUAL
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000e | OP_NOT
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== end of code ==
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0000 1 OP_CONSTANT 0 '5'
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[ 5 ]
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0002 | OP_CONSTANT 1 '4'
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[ 5 ][ 4 ]
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0004 | OP_SUBSTRACT
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[ 1 ]
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0005 | OP_CONSTANT 2 '3'
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[ 1 ][ 3 ]
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0007 | OP_CONSTANT 3 '2'
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[ 1 ][ 3 ][ 2 ]
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0009 | OP_MULTIPLY
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[ 1 ][ 6 ]
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000a | OP_GREATER
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[ false ]
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000b | OP_NIL
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[ false ][ nil ]
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000c | OP_NOT
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[ false ][ true ]
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000d | OP_EQUAL
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[ false ]
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000e | OP_NOT
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[ true ]
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000f 2 OP_RETURN
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true
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>
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```
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