38 lines
1.2 KiB
Markdown
38 lines
1.2 KiB
Markdown
# nondescript
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Nondescript is a nim implementation of lox (see https://craftinginterpreters.com) with large deviations.
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## Deviations from lox
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- NOT SOURCE COMPATIBLE WITH LOX
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- Everything is an expression, except variable declarations and break statements
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- hence expressions can contain statements, so the stack is tracked inside the compiler, using compiler.stackCount
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- uses different local representation than lox inside the compiler
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- compiler.addLocal also has a delta argument - check it out if interested
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- 1 file = 1 chunk
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- function objects are just a pointer to an instruction to jump to (right now instruction index, but this will change)
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- constant indexes, local indexes have 2 bytes as arguments
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- no object orientation
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- closures are not implemented yet
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- block expressions can be labelled and break takes a label to break out of
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- set block expression results using ^, ^label
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- set the return value of functions using ^result
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- plans for the far future: defer, tables, lists
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## Examples
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benchmarks/fib.nds
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## Building
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Requirements:
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- nim (1.6.2 tested)
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- c compiler (gcc, glibc tested)
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The 4 steps to a REPL:
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```
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git clone https://github.com/prod2/nondescript
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cd nondescript
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nim c main
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./nds
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``` |