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Finally fixed the bullshit way that string literals were converted to lua.

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This commit is contained in:
Bruce Hill 2017-10-19 18:16:15 -07:00
parent c7994cf720
commit ca5896b7bd
2 changed files with 35 additions and 16 deletions
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27
lib/metaprogramming.nom
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@ -16,13 +16,22 @@ lua> ".."
rule [escaped parse %shorthand as %longhand] =:
lua> ".."
|local aliases = nomsu:get_stubs(nomsu:typecheck(vars, "shorthand", "List").value);
|if #vars.longhand.value ~= 1 then;
| nomsu:error("Expected only 1 line to parse to, but got "..tostring(#vars.longhand.value));
|end;
|local template = nomsu:typecheck(vars, "longhand", "Thunk").value[1];
|local template = nomsu:typecheck(vars, "longhand", "Thunk").value;
|local function parsing_as(nomsu, vars)
| local replacement = nomsu:replaced_vars(template, vars);
# Single expression/statement
| if #template == 1 then;
| local replacement = nomsu:replaced_vars(template[1], vars);
| return nomsu:tree_to_lua(replacement);
| end
# Multiple statements
| local lua_bits = {};
| for _,bit in ipairs(template) do;
| bit = nomsu:replaced_vars(bit, vars);
| local expr, statement = nomsu:tree_to_lua(bit);
| if statement then; table.insert(lua_bits, statement); end;
| if expr then; table.insert(lua_bits, "ret = "..expr..";"); end;
| end;
| return nil, table.concat(lua_bits, "\\n");
|end;
|nomsu:defmacro(aliases, parsing_as, template.src);
escaped parse \[parse %shorthand as %longhand] as \: escaped parse \%shorthand as \%longhand
@ -56,10 +65,10 @@ compile [repr %obj] to:
compile [type %obj, type of %obj] to:
"type(\(%obj as lua))"
parse [lua do> %block] as: lua> ".."
|do;
| \(%block)
|end;
parse [lua do> %block] as:
lua> "do;"
lua> %block
lua> "end;"
rule [%tree as lua statement] =:
lua do> ".."
|local _,statement = nomsu:tree_to_lua(\(%tree));

22
nomsu.moon
View File

@ -600,18 +600,28 @@ end)]])\format(concat(lua_bits, "\n"))
initialize_core: =>
-- Sets up some core functionality
nomsu_string_as_lua = (code)=>
concat_parts = {}
for bit in *code.value
if type(bit) == "string"
insert concat_parts, bit
else
expr, statement = @tree_to_lua bit
if statement
@error "Cannot use [[#{bit.src}]] as a string interpolation value, since it's not an expression."
insert concat_parts, expr
return concat(concat_parts)
-- Uses named local functions to help out callstack readability
lua_code = (vars)=>
inner_vars = setmetatable({}, {__index:(_,key)-> "vars[#{repr(key)}]"})
lua = @tree_to_value(vars.code, inner_vars)
lua = nomsu_string_as_lua(@, vars.code)
return nil, lua
@defmacro "lua > %code", lua_code
@defmacro "lua> %code", lua_code
lua_value = (vars)=>
inner_vars = setmetatable({}, {__index:(_,key)-> "vars[#{repr(key)}]"})
lua = @tree_to_value(vars.code, inner_vars)
lua = nomsu_string_as_lua(@, vars.code)
return lua, nil
@defmacro "= lua %code", lua_value
@defmacro "=lua %code", lua_value
run_file = (vars)=>
if vars.filename\match(".*%.lua")