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[Tolk] Compilation pipeline, register global symbols in advance

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Since I've implemented AST, now I can drop forward declarations.
Instead, I traverse AST of all files and register global symbols
(functions, constants, global vars) as a separate step, in advance.

That's why, while converting AST to Expr/Op, all available symbols are
already registered.
This greatly simplifies "intermediate state" of yet unknown functions
and checking them afterward.

Redeclaration of local variables (inside the same scope)
is now also prohibited.
This commit is contained in:
tolk-vm 2024-10-31 11:04:58 +04:00
parent 80001d1756
commit 5a3e3595d6
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GPG key ID: 7905DD7FE0324B12
28 changed files with 1266 additions and 1134 deletions
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48
tolk/ast-visitor.h
View file

@ -148,52 +148,4 @@ public:
}
};
class ASTVisitorToplevelDeclarations : public ASTVisitor {
protected:
using parent = ASTVisitorToplevelDeclarations;
virtual void on_pragma_no_arg(V<ast_pragma_no_arg> v) = 0;
virtual void on_pragma_version(V<ast_pragma_version> v) = 0;
virtual void on_include_statement(V<ast_include_statement> v) = 0;
virtual void on_constant_declaration(V<ast_constant_declaration> v) = 0;
virtual void on_global_var_declaration(V<ast_global_var_declaration> v) = 0;
virtual void on_function_declaration(V<ast_function_declaration> v) = 0;
void visit(AnyV v) final {
switch (v->type) {
case ast_pragma_no_arg:
on_pragma_no_arg(v->as<ast_pragma_no_arg>());
break;
case ast_pragma_version:
on_pragma_version(v->as<ast_pragma_version>());
break;
case ast_include_statement:
on_include_statement(v->as<ast_include_statement>());
break;
case ast_constant_declaration_list:
for (const auto& v_decl : v->as<ast_constant_declaration_list>()->get_declarations()) {
on_constant_declaration(v_decl->as<ast_constant_declaration>());
}
break;
case ast_global_var_declaration_list:
for (const auto& v_decl : v->as<ast_global_var_declaration_list>()->get_declarations()) {
on_global_var_declaration(v_decl->as<ast_global_var_declaration>());
}
break;
case ast_function_declaration:
on_function_declaration(v->as<ast_function_declaration>());
break;
default:
throw UnexpectedASTNodeType(v, "ASTVisitorToplevelDeclarations::visit");
}
}
public:
void start_visiting_file(V<ast_tolk_file> v_file) {
for (AnyV v : v_file->get_toplevel_declarations()) {
visit(v);
}
}
};
} // namespace tolk