Dawid Sobczak
e6b88d5a0f
The goal of stage 06 is to try parse zig synax in lua. I pulled in lpeglable 1.2.0 and parser-gen off github to get started. All of this needs to be cleaned up rather soon. Lua boostraps using tcc and musl from the previous stage. Since musl 0.6.0 doesn't support dynamic linking this build of lua doesn't support shared libraries. I couldn't easily patch musl with dlopen and friends so instead I link statically and call deps with c api.
33 lines
804 B
Lua
33 lines
804 B
Lua
local m = require'lpeglabel'
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local re = require'relabel'
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local id = m.R'az'^1
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local g = m.P{
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"S",
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S = m.V"Id" * m.V"List",
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List = -m.P(1) + m.V"Comma" * m.V"Id" * m.V"List",
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Id = m.V"Sp" * id + m.T(1),
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Comma = m.V"Sp" * "," + m.T(2),
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Sp = m.S" \n\t"^0,
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}
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function mymatch (g, s)
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local r, e, sfail = g:match(s)
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if not r then
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local line, col = re.calcline(s, #s - #sfail)
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local msg = "Error at line " .. line .. " (col " .. col .. ")"
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if e == 1 then
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return r, msg .. ": expecting an identifier before '" .. sfail .. "'"
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elseif e == 2 then
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return r, msg .. ": expecting ',' before '" .. sfail .. "'"
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else
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return r, msg
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end
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end
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return r
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end
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print(mymatch(g, "one,two"))
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print(mymatch(g, "one two"))
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print(mymatch(g, "one,\n two,\nthree,"))
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