[Library] A native Luals parser #2910
Description
I have completed most of the work, but there may still be many bugs in the details that I will gradually fix in future use. I will implement a new language server based on this. If you are interested, you can continue to follow my progress.
the library: https://crates.io/crates/emmylua_parser
a simple example:
let code = r#"
local a = 1
local b = 2
local function foo(x)
return x + 1
end
function f()
end
local c = foo(a + b)
if c > 2 then
print(c)
elseif c == 2 then
else
print("c is not greater than 2")
end
for i = 1, 10 do
print(i)
end
for i, v in ipairs({1, 2, 3}) do
print(i, v)
end
while c < 10 do
c = c + 1
end
repeat
c = c - 1
until c == 0
::ll::
goto ll
local a = c["string"]
"#;
let tree = LuaParser::parse(code, ParserConfig::default());
let chunk = tree.get_chunk_node();
for node in chunk.descendants::<LuaAst>() {
match node {
LuaAst::LuaChunk(lua_chunk) => {
assert!(lua_chunk.get_block().is_some());
}
LuaAst::LuaBlock(lua_block) => {
assert!(lua_block.get_stats().next().is_some());
}
LuaAst::LuaAssignStat(lua_assign_stat) => {
let (var_list, expr_list) = lua_assign_stat.get_var_and_expr_list();
assert!(var_list.len() > 0);
assert!(expr_list.len() > 0);
}
LuaAst::LuaLocalStat(lua_local_stat) => {
let mut name_list = lua_local_stat.get_local_name_list();
let local_name = name_list.next().unwrap();
assert!(local_name.get_name_token().is_some());
let mut expr_list = lua_local_stat.get_value_exprs();
assert!(expr_list.next().is_some());
}
LuaAst::LuaCallExprStat(lua_call_expr_stat) => {
assert!(lua_call_expr_stat.get_call_expr().is_some());
}
LuaAst::LuaLabelStat(lua_label_stat) => {
assert!(lua_label_stat.get_label_name_token().is_some());
assert_eq!(
lua_label_stat
.get_label_name_token()
.unwrap()
.get_name_text(),
"ll"
);
}
LuaAst::LuaGotoStat(lua_goto_stat) => {
assert!(lua_goto_stat.get_label_name_token().is_some());
assert_eq!(
lua_goto_stat
.get_label_name_token()
.unwrap()
.get_name_text(),
"ll"
);
}
LuaAst::LuaDoStat(lua_do_stat) => {
assert!(lua_do_stat.get_block().is_some());
}
LuaAst::LuaWhileStat(lua_while_stat) => {
assert!(lua_while_stat.get_condition_expr().is_some());
assert!(lua_while_stat.get_block().is_some());
}
LuaAst::LuaRepeatStat(lua_repeat_stat) => {
assert!(lua_repeat_stat.get_block().is_some());
assert!(lua_repeat_stat.get_condition_expr().is_some());
}
LuaAst::LuaIfStat(lua_if_stat) => {
assert!(lua_if_stat.get_condition_expr().is_some());
assert!(lua_if_stat.get_block().is_some());
assert!(lua_if_stat.get_else_if_clause_list().next().is_some());
assert!(lua_if_stat.get_else_clause().is_some());
}
LuaAst::LuaForStat(lua_for_stat) => {
assert!(lua_for_stat.get_var_name().is_some());
assert!(lua_for_stat.get_block().is_some());
assert_eq!(lua_for_stat.get_iter_expr().count(), 2);
}
LuaAst::LuaForRangeStat(lua_for_range_stat) => {
assert_eq!(lua_for_range_stat.get_var_name_list().count(), 2);
assert!(lua_for_range_stat.get_block().is_some());
assert!(lua_for_range_stat.get_expr_list().next().is_some());
}
LuaAst::LuaFuncStat(lua_func_stat) => {
assert!(lua_func_stat.get_func_name().is_some());
assert!(lua_func_stat.get_closure().is_some());
}
LuaAst::LuaLocalFuncStat(lua_local_func_stat) => {
assert!(lua_local_func_stat.get_local_name().is_some());
assert!(lua_local_func_stat.get_closure().is_some());
}
LuaAst::LuaReturnStat(lua_return_stat) => {
assert!(lua_return_stat.get_expr_list().next().is_some());
}
LuaAst::LuaNameExpr(lua_name_expr) => {
assert!(lua_name_expr.get_name_token().is_some());
}
LuaAst::LuaIndexExpr(lua_index_expr) => {
assert!(lua_index_expr.get_prefix_expr().is_some());
assert!(lua_index_expr.get_indexed_expr().is_some());
}
LuaAst::LuaTableExpr(lua_table_expr) => {
assert!(lua_table_expr.is_array());
}
_ => {}
}
}