208 lines
8.0 KiB
Plaintext
208 lines
8.0 KiB
Plaintext
#..
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This File contains actions for making actions and compile-time actions and some helper
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functions to make that easier.
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# Compile-time action to make compile-time actions:
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immediately:
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lua> ".."
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nomsu:define_compile_action("compile %actions to %lua", \(!! code location !!), function(\%actions, \%lua)
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local tree = nomsu.compilestack[#nomsu.compilestack];
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local lua = Lua(tree.source, "nomsu:define_compile_action(");
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local stubs = {};
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for i, action in ipairs(\%actions.value) do
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stubs[i] = nomsu:tree_to_named_stub(action);
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end
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lua:append(repr(stubs), ", ", repr(tree.source:get_line()), ", function(");
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local args = {};
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for i,tok in ipairs(\%actions.value[1].value) do
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if tok.type == "Var" then args[#args+1] = nomsu:var_to_lua_identifier(tok.value); end
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end
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if \%lua.type == "Text" then
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error("Invalid type for 'compile % to %', expected a dict with expr/statements, but got text.", 0);
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end
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for i, arg in ipairs(args) do
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lua:append(arg);
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if i < #args then lua:append(", ") end
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end
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local body_lua = nomsu:tree_to_lua(\%lua):as_statements();
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body_lua:declare_locals(args);
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lua:append("\\n ", body_lua, "\\nend);")
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return lua;
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end);
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# Compile-time action to make actions
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immediately:
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compile [action %actions %body] to:
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lua> ".."
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local tree = nomsu.compilestack[#nomsu.compilestack];
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local lua = Lua(tree.source, "nomsu:define_action(");
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local stubs = {};
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for i, action in ipairs(\%actions.value) do
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stubs[i] = nomsu:tree_to_named_stub(action);
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end
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lua:append(repr(stubs), ", ", repr(tree.source:get_line()), ", function(");
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local args = {};
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for i,tok in ipairs(\%actions.value[1].value) do
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if tok.type == "Var" then args[#args+1] = nomsu:var_to_lua_identifier(tok.value); end
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end
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for i, arg in ipairs(args) do
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lua:append(arg);
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if i < #args then lua:append(", ") end
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end
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local body_lua = nomsu:tree_to_lua(\%lua):as_statements();
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body_lua:declare_locals(args);
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lua:append("\\n ", body_lua, "\\nend);")
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return lua;
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# Macro to make nomsu macros:
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immediately:
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compile [parse %shorthand as %longhand] to:
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lua> ".."
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local tree = nomsu.compilestack[#nomsu.compilestack];
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local lua = Lua(tree.source, "nomsu:define_compile_action(");
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local stubs = {};
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for i, action in ipairs(\%shorthand.value) do
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stubs[i] = nomsu:tree_to_named_stub(action);
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end
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lua:append(repr(stubs), ", ", repr(tree.source:get_line()), ", function(");
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local args = {};
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for i,tok in ipairs(\%shorthand.value[1].value) do
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if tok.type == "Var" then args[#args+1] = nomsu:var_to_lua_identifier(tok.value); end
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end
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for i, arg in ipairs(args) do
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lua:append(arg);
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if i < #args then lua:append(", ") end
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end
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local template;
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if \%longhand.type == "Block" then
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local lines = {};
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for i, line in ipairs(\%longhand.value) do lines[i] = line.source:get_text(); end
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template = repr(table.concat(lines, "\\n"));
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else
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template = repr(\%longhand.source:get_text());
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end
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local replacements = {};
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for i, a in ipairs(args) do replacements[i] = a.."="..a; end
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replacements = "{"..table.concat(replacements, ", ").."}";
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lua:append([[)
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local template = nomsu_parse(]]..template..[[, ]]..repr(tree.source.filename)..[[);
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local replacement = nomsu:tree_with_replaced_vars(template, ]]..replacements..[[);
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return nomsu:tree_to_lua(replacement, nomsu.compilestack[#nomsu.compilestack].source.filename);
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end);
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]]);
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return lua;
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action [remove action %stub]:
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lua> ".."
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local fn = ACTIONS[\%stub];
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local metadata = nomsu.action_metadata[fn];
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for i=#metadata.aliases,1,-1 do
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metadata.arg_orders[metadata.aliases[i]] = nil;
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table.remove(metadata.aliases, i);
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end
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ACTIONS[\%stub] = nil;
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immediately:
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action [%tree as lua]:
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=lua "nomsu:tree_to_lua(\%tree)"
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action [%tree as lua expr]:
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lua> ".."
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local lua = nomsu:tree_to_lua(\%tree);
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if not lua.is_value then
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error("Invalid thing to convert to lua expr: "..\%tree.source:get_text());
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end
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return lua;
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action [%tree as lua statements]:
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lua> ".."
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local lua = nomsu:tree_to_lua(\%tree):as_statements();
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lua:declare_locals();
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return lua;
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action [%tree as value]:
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=lua "nomsu:tree_to_value(\%tree)"
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action [%tree's stub]:
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=lua "nomsu:tree_to_stub(\%tree)"
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immediately:
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compile [%tree's source code, %tree' source code] to {expr:"\(%tree as lua expr).source:get_text()"}
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compile [repr %obj] to {expr:"repr(\(%obj as lua expr))"}
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compile [type of %obj] to {expr:"type(\(%obj as lua expr))"}
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immediately:
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compile [nomsu] to {expr:"nomsu"}
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compile [%var as lua identifier] to {expr:"nomsu:var_to_lua_identifier(\(%var as lua expr))"}
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action [action %names metadata]:
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=lua "nomsu.action_metadata[ACTIONS[\%names]]"
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# Get the source code for a function
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action [help %action]:
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lua> ".."
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local metadata = \(action %action metadata);
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if not metadata then
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print("Action not found: "..repr(\%action));
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else
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print(metadata.src or "<unknown source code>");
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end
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# Compiler tools
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immediately:
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#local def_metadata = nomsu.tree_metadata[nomsu.compilestack[#nomsu.compilestack]];
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compile [run %code] to {..}
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expr: ".."
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nomsu:run(\(%code as lua expr), '\
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=lua "nomsu:get_line_number(nomsu.compilestack[#nomsu.compilestack])"
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..')
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parse [enable debugging] as: lua> "nomsu.debug = true;"
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parse [disable debugging] as: lua> "nomsu.debug = false;"
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immediately:
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compile [show lua %block] to:
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lua> ".."
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local \%lua = nomsu:tree_to_lua(\%block);
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return {statements = "print("..repr(\%lua.statements or \%lua.expr)..");"};
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immediately:
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compile [say %message] to:
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lua> ".."
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if \%message.type == "Text" then
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return {statements="print("..\(%message as lua expr)..");"};
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else
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return {statements="print(stringify("..\(%message as lua expr).."));"};
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end
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# Return
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immediately:
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#.. Return statement is wrapped in a do..end block because Lua is unhappy if you
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put code after a return statement, unless you wrap it in a block.
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compile [return] to {statements:"do return; end"}
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compile [return %return_value] to {statements:"do return \(%return_value as lua expr); end"}
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# Error functions
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immediately:
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compile [barf] to {statements:"error(nil, 0);"}
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compile [barf %msg] to {statements:"error(\(%msg as lua expr), 0);"}
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compile [assume %condition] to:
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lua> "local \%assumption = 'Assumption failed: '..\%condition.source:get_text();"
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return {..}
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statements:".."
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if not \(%condition as lua expr) then
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error(\(repr %assumption), 0);
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end
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compile [assume %condition or barf %msg] to {..}
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statements:".."
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if not \(%condition as lua expr) then
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error(\(%msg as lua expr), 0);
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end
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# Literals
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immediately:
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compile [yes] to {expr:"true"}
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compile [no] to {expr:"false"}
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compile [nothing, nil, null] to {expr:"nil"}
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