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working on moving rest of obj stuff into obj_lower

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This commit is contained in:
Nathan Braswell
2017-11-03 00:39:58 -04:00
parent 5b8ef4ce2e
commit cb720e5cd6
9 changed files with 295 additions and 144 deletions
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196
stdlib/obj_lower.krak
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@@ -10,34 +10,58 @@ import ast_nodes:*
import ast_transformation:*
import pass_common:*
import hash_set:*
/*
Here's how we lower objects
PASS ONE THROUGH name_ast_map
1 first, we make sure that all functions, if statments, while loops and for loops have code blocks
as children, not just statements.
1 during the same pass, we "uglify" for loops and while loops so that functions that need pre and post statements always
have a code block to insert them into that makes sure that they get run.
1 we also make a set of all type_defs for pass 4
// Here's how we lower objects
// 1 first, we make sure that all functions, if statments, while loops and for loops have code blocks
// as children, not just statements.
// 1 during the same pass, we "uglify" for loops and while loops so that functions that need pre and post statements always
// have a code block to insert them into that makes sure that they get run.
// 2 in another pass (more complicated because different children have different parent scopes)
// we transform the short circuit operators
// 3 then on the pass up the chain, at function calls we add in they copy_construct in and defer destruct out
// temporaries.
// 3 this is also when we add in defer destructs for function parameters (inside the function) and declaration statements
2 in another pass (more complicated because different children have different parent scopes)
we transform the short circuit operators
3 then on the pass up the chain, at function calls we add in they copy_construct in and defer destruct out
temporaries. Also, pull out init method calls.
3 this is also when we add in defer destructs for function parameters (inside the function) and declaration statements
PASS TWO THROUGH name_ast_map
4 change all methods to take in self, change all method calls to pass in self, change all in method references to be explicit
*/
fun obj_lower(name_ast_map: *map<string, pair<*tree<symbol>,*ast_node>>, ast_to_syntax: *map<*ast_node, *tree<symbol>>) {
var visited1 = hash_set<*ast_node>()
var visited2 = hash_set<*ast_node>()
var visited3 = hash_set<*ast_node>()
var functions_visited_for_construct_in_destruct_out = hash_set<*ast_node>()
var all_type_defs = set<*ast_node>()
name_ast_map->for_each(fun(name: string, syntax_ast_pair: pair<*tree<symbol>,*ast_node>) {
// Pass 1
var ensure_block_and_munge = fun(node: *ast_node, parent_chain: *stack<*ast_node>) {
match(*node) {
ast_node::function(backing) if (backing.body_statement && !is_code_block(backing.body_statement)) backing.body_statement = ast_code_block_ptr(backing.body_statement)
ast_node::type_def(backing) all_type_defs.add(node)
ast_node::function(backing) if (backing.body_statement && !is_code_block(backing.body_statement)) {
backing.body_statement = ast_code_block_ptr(backing.body_statement)
add_to_scope("~enclosing_scope", node, backing.body_statement)
if (!is_code_block(backing.body_statement))
error("BUT EXTRA WHY")
}
ast_node::if_statement(backing) {
if (!is_code_block(backing.then_part)) backing.then_part = ast_code_block_ptr(backing.then_part)
if (backing.else_part && !is_code_block(backing.else_part)) backing.else_part = ast_code_block_ptr(backing.else_part)
if (!is_code_block(backing.then_part)) {
backing.then_part = ast_code_block_ptr(backing.then_part)
add_to_scope("~enclosing_scope", node, backing.then_part)
}
if (backing.else_part && !is_code_block(backing.else_part)) {
backing.else_part = ast_code_block_ptr(backing.else_part)
add_to_scope("~enclosing_scope", node, backing.else_part)
}
}
// no need for case because it's already been lowered
ast_node::while_loop(backing) {
if (!is_code_block(backing.statement)) backing.statement = ast_code_block_ptr(backing.statement)
if (!is_code_block(backing.statement)) {
backing.statement = ast_code_block_ptr(backing.statement)
add_to_scope("~enclosing_scope", node, backing.statement)
}
var condition = backing.condition
backing.condition = ast_value_ptr(string("true"), type_ptr(base_type::boolean()))
// objects do not coerce to booleans, so it should be ok for this not to be a ref
@@ -48,7 +72,10 @@ fun obj_lower(name_ast_map: *map<string, pair<*tree<symbol>,*ast_node>>, ast_to_
backing.statement->code_block.children.add(1, condition_if)
}
ast_node::for_loop(backing) {
if (!is_code_block(backing.body)) backing.body = ast_code_block_ptr(backing.body)
if (!is_code_block(backing.body)) {
backing.body = ast_code_block_ptr(backing.body)
add_to_scope("~enclosing_scope", node, backing.body)
}
add_before_in(backing.init, node, parent_chain->top())
backing.init = null<ast_node>()
// the do_update goes in the block above the for
@@ -56,7 +83,9 @@ fun obj_lower(name_ast_map: *map<string, pair<*tree<symbol>,*ast_node>>, ast_to_
add_before_in(ast_declaration_statement_ptr(update_ident, ast_value_ptr(string("false"), type_ptr(base_type::boolean()))),
node, parent_chain->top())
var update_if = ast_if_statement_ptr(update_ident)
add_to_scope("~enclosing_scope", backing.body, update_if)
update_if->if_statement.then_part = ast_code_block_ptr(backing.update)
add_to_scope("~enclosing_scope", update_if, update_if->if_statement.then_part)
backing.update = null<ast_node>()
backing.body->code_block.children.add(0, update_if)
backing.body->code_block.children.add(1, ast_assignment_statement_ptr(update_ident, ast_value_ptr(string("true"), type_ptr(base_type::boolean()))))
@@ -70,6 +99,36 @@ fun obj_lower(name_ast_map: *map<string, pair<*tree<symbol>,*ast_node>>, ast_to_
condition_if->if_statement.then_part = ast_branching_statement_ptr(branching_type::break_stmt())
backing.body->code_block.children.add(3, condition_if)
}
ast_node::return_statement(backing) {
var block = parent_chain->top()
if (!is_code_block(block))
error("Isn't block in return statement obj munging")
/*var block = ast_code_block_ptr()*/
/*add_to_scope("~enclosing_scope", parent_chain->item_from_top_satisfying(fun(i: *ast_node): bool return is_code_block(i) || is_function(i);), block)*/
/*replace_with_in(node, block, parent_chain)*/
var return_value = backing.return_value
var enclosing_function = parent_chain->item_from_top_satisfying(is_function)
if (!is_code_block(enclosing_function->function.body_statement))
error("this would by unusual")
if (return_value) {
if (get_ast_type(enclosing_function)->return_type->is_ref)
return_value = make_operator_call("&", vector(return_value))
var temp_return = ast_identifier_ptr("temp_boom_return", get_ast_type(return_value)->clone_without_ref(), block)
add_to_scope("temp_boom_return", temp_return, block)
add_to_scope("~enclosing_scope", block, temp_return)
/*block->code_block.children.add(ast_declaration_statement_ptr(temp_return, null<ast_node>()))*/
/*block->code_block.children.add(assign_or_copy_construct_statement(temp_return, return_value))*/
add_before_in(ast_declaration_statement_ptr(temp_return, null<ast_node>()), node, block)
add_before_in(assign_or_copy_construct_statement(temp_return, return_value), node, block)
// dereference so that the real ref can take it back
if (get_ast_type(enclosing_function)->return_type->is_ref)
temp_return = make_operator_call("*", vector(temp_return))
backing.return_value = temp_return
}
if (!is_code_block(enclosing_function->function.body_statement))
error("is this would by unusual")
/*block->code_block.children.add(node)*/
}
}
}
run_on_tree(ensure_block_and_munge, empty_pass_second_half(), syntax_ast_pair.second, &visited1)
@@ -97,8 +156,10 @@ fun obj_lower(name_ast_map: *map<string, pair<*tree<symbol>,*ast_node>>, ast_to_
if (func_name == "||")
condition = make_operator_call("!", vector(condition))
var short_circuit_if = ast_if_statement_ptr(condition)
add_to_scope("~enclosing_scope", parent_chain->from_top(enclosing_block_idx), short_circuit_if)
// how to get proper parent scoping working for this part
short_circuit_if->if_statement.then_part = ast_code_block_ptr(ast_assignment_statement_ptr(short_circuit_result, backing.parameters[1]))
add_to_scope("~enclosing_scope", short_circuit_if, short_circuit_if->if_statement.then_part)
add_before_in(short_circuit_declaration, parent_chain->from_top(enclosing_block_idx-1), parent_chain->from_top(enclosing_block_idx))
add_before_in(short_circuit_if, parent_chain->from_top(enclosing_block_idx-1), parent_chain->from_top(enclosing_block_idx))
replace_with_in(node, short_circuit_result, parent_chain)
@@ -128,12 +189,14 @@ fun obj_lower(name_ast_map: *map<string, pair<*tree<symbol>,*ast_node>>, ast_to_
)
return
}
var enclosing_block_idx = parent_chain->index_from_top_satisfying(fun(i: *ast_node): bool return is_code_block(i);)
var enclosing_block_idx = parent_chain->index_from_top_satisfying(is_code_block)
var replace_before: *ast_node
if (enclosing_block_idx > 0)
replace_before = parent_chain->from_top(enclosing_block_idx-1)
else
else if (enclosing_block_idx == 0)
replace_before = node
else
error("gonna corrupt")
var replace_in = parent_chain->from_top(enclosing_block_idx)
var func_type = get_ast_type(backing.func)
for (var i = 0; i < backing.parameters.size; i++;) {
@@ -146,7 +209,9 @@ fun obj_lower(name_ast_map: *map<string, pair<*tree<symbol>,*ast_node>>, ast_to_
in_function_param_type = get_ast_type(param)->clone_without_ref()
var param_type = get_ast_type(param)
if (!in_function_param_type->is_ref && param_type->indirection == 0 && (param_type->is_object() && has_method(param_type->type_def, "copy_construct", vector(param_type->clone_with_indirection(1))))) {
var temp_ident = ast_identifier_ptr("temporary_param_boom", param_type->clone_without_ref(), null<ast_node>())
var temp_ident = ast_identifier_ptr("temporary_param_boom", param_type->clone_without_ref(), replace_in)
add_to_scope("temporary_param_boom", temp_ident, replace_in)
add_to_scope("~enclosing_scope", replace_in, temp_ident)
var declaration = ast_declaration_statement_ptr(temp_ident, null<ast_node>())
var copy_in = make_method_call(temp_ident, "copy_construct", vector(make_operator_call("&", vector(param))))
add_before_in(declaration, replace_before, replace_in)
@@ -155,9 +220,10 @@ fun obj_lower(name_ast_map: *map<string, pair<*tree<symbol>,*ast_node>>, ast_to_
}
}
var func_return_type = func_type->return_type
/*if (!func_return_type->is_ref && func_return_type->indirection == 0 && (func_return_type->is_object() && has_method(func_return_type->type_def, "destruct", vector<*type>()))) {*/
if (!func_return_type->is_ref && func_return_type->indirection == 0 && func_return_type->is_object()) {
var temp_return = ast_identifier_ptr("temporary_return_boomchaka", func_return_type, null<ast_node>())
var temp_return = ast_identifier_ptr("temporary_return_boomchaka", func_return_type, replace_in)
add_to_scope("temporary_return_boomchaka", temp_return, replace_in)
add_to_scope("~enclosing_scope", replace_in, temp_return)
var declaration = ast_declaration_statement_ptr(temp_return, node)
add_before_in(declaration, replace_before, replace_in)
if (has_method(func_return_type->type_def, "destruct", vector<*type>())) {
@@ -179,6 +245,8 @@ fun obj_lower(name_ast_map: *map<string, pair<*tree<symbol>,*ast_node>>, ast_to_
var param_type = get_ast_type(param)
if (!param_type->is_ref && param_type->indirection == 0 && (param_type->is_object() && has_method(param_type->type_def, "destruct", vector<*type>()))) {
// the first pass ensures a code_block child
if (!is_code_block(backing.body_statement))
error("BUT WHY")
backing.body_statement->code_block.children.add(order++,
ast_defer_statement_ptr(make_method_call(param, "destruct", vector<*ast_node>())))
}
@@ -190,7 +258,9 @@ fun obj_lower(name_ast_map: *map<string, pair<*tree<symbol>,*ast_node>>, ast_to_
return;
if (!ident_type->is_ref && ident_type->indirection == 0 && ident_type->is_object()) {
if (backing.expression && has_method(ident_type->type_def, "copy_construct", vector(get_ast_type(backing.expression)->clone_with_increased_indirection()))) {
var temp_cpy_ctst = ast_identifier_ptr("temp_declaration_copy_construct", get_ast_type(backing.expression)->clone_without_ref(), null<ast_node>())
var temp_cpy_ctst = ast_identifier_ptr("temp_declaration_copy_construct", get_ast_type(backing.expression)->clone_without_ref(), parent_chain->top())
add_to_scope("temp_declaration_copy_construct", temp_cpy_ctst, parent_chain->top())
add_to_scope("~enclosing_scope", parent_chain->top(), temp_cpy_ctst)
var declaration = ast_declaration_statement_ptr(temp_cpy_ctst, backing.expression)
add_after_in(make_method_call(backing.identifier, "copy_construct", vector(make_operator_call("&", vector(temp_cpy_ctst)))),
node, parent_chain->top())
@@ -204,10 +274,92 @@ fun obj_lower(name_ast_map: *map<string, pair<*tree<symbol>,*ast_node>>, ast_to_
node, parent_chain->top())
}
}
if (backing.init_method_call) {
add_after_in(backing.init_method_call, node, parent_chain)
backing.init_method_call = null<ast_node>()
}
}
}
}
run_on_tree(empty_pass_first_half(), construct_in_destruct_out, syntax_ast_pair.second, &visited3)
})
var visited4 = hash_set<*ast_node>()
var var_to_obj = map<*ast_node, *ast_node>()
var fun_to_obj = map<*ast_node, *ast_node>()
all_type_defs.for_each(fun(t: *ast_node) {
t->type_def.variables.for_each(fun(v: *ast_node) {
if (is_declaration_statement(v)) {
var_to_obj[v->declaration_statement.identifier] = t
} else {
// is template
v->template.instantiated.for_each(fun(tv: *ast_node) {
var_to_obj[v->declaration_statement.identifier] = t
})
}
})
t->type_def.methods.for_each(fun(m: *ast_node) {
if (is_function(m)) {
fun_to_obj[m] = t
} else {
// is template
m->template.instantiated.for_each(fun(tm: *ast_node) {
fun_to_obj[tm] = t
})
}
})
})
fun_to_obj.for_each(fun(method: *ast_node, object: *ast_node) {
var this_type = object->type_def.self_type->clone_with_increased_indirection()
var this_ident = ast_identifier_ptr("this", this_type, method)
method->function.parameters.add(0, this_ident)
add_to_scope("this", this_ident, method)
add_to_scope("~enclosing_scope", method, this_ident)
method->function.type->parameter_types.add(0, this_type)
})
name_ast_map->for_each(fun(name: string, syntax_ast_pair: pair<*tree<symbol>,*ast_node>) {
// Pass 4
var unmethod: fun(*ast_node,*stack<*ast_node>,*hash_set<*ast_node>): bool = fun(node: *ast_node, parent_chain: *stack<*ast_node>, visited: *hash_set<*ast_node>): bool {
match(*node) {
ast_node::function_call(backing) {
// add this to call (including if it's implicit)
if (is_dot_style_method_call(node)) {
var this_ident = backing.func->function_call.parameters[0]
if (backing.func->function_call.func->function.name == ".")
this_ident = make_operator_call("&", vector(this_ident))
backing.func = backing.func->function_call.parameters[1]
backing.parameters.add(0, this_ident)
} else {
// add this
// don't need to check to see if is implicit because a non implicit one wouldn't be in the map
var enclosing_obj = fun_to_obj.get_with_default(backing.func, null<ast_node>())
if (enclosing_obj) {
var this_ident = parent_chain->item_from_top_satisfying(fun(i: *ast_node): bool {
return is_function(i) && fun_to_obj.get_with_default(i, null<ast_node>()) == enclosing_obj
})->function.parameters[0]
backing.parameters.add(0, this_ident)
}
}
}
ast_node::identifier(backing) {
// not if this is the declaration
if (!is_declaration_statement(parent_chain->top()) || parent_chain->top()->declaration_statement.identifier != node) {
// needs to make sure this is actually implicit
var enclosing_obj = var_to_obj.get_with_default(node, null<ast_node>())
if (enclosing_obj && !(is_function_call(parent_chain->top()) &&
is_function(parent_chain->top()->function_call.func) &&
(parent_chain->top()->function_call.func->function.name == "." ||
parent_chain->top()->function_call.func->function.name == "->") &&
parent_chain->top()->function_call.parameters[1] == node)) {
var this_ident = parent_chain->item_from_top_satisfying(fun(i: *ast_node): bool {
return is_function(i) && fun_to_obj.get_with_default(i, null<ast_node>()) == enclosing_obj
})->function.parameters[0]
replace_with_in(node, make_operator_call("->", vector(this_ident, node)), parent_chain)
}
}
}
}
return true
}
run_on_tree(unmethod, empty_pass_second_half(), syntax_ast_pair.second, &visited4)
})
}