diff --git a/.gitignore b/.gitignore
index 7e4fcb7..f241371 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,6 +23,7 @@
 
 !scripts
 !scripts/common.mak
+!scripts/lsproj.mak
 !scripts/install.bat
 !scripts/uninstall.bat
 
diff --git a/Makefile b/Makefile
index c5fc586..f244a48 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-export MAKEFLAGS += --silent -r
+export MAKEFLAGS += --silent -r -j
 export flags=-std=c++17 -Wall -Wno-main -Wno-trigraphs -Wno-missing-braces -Wno-stringop-overflow
 export ldflags=-L$(bin)/$(profile)
 export lib=ppc$(version-major)-
@@ -51,7 +51,7 @@ build: version
 	make -f scripts/common.mak
 	if exist "$(subst /,\,$(bin)\$(output).exe)" del "$(subst /,\,$(bin)\$(output).exe)"
 	mklink /H "$(subst /,\,$(bin)\$(output).exe)" "$(subst /,\,$(binary))" > NUL
-
+	echo Done!
 clear:
 	if exist $(subst /,\,$(oldbin)) rmdir /s /q $(subst /,\,$(oldbin))
 
diff --git a/include/compiler/treeifier/ast.hh b/include/compiler/treeifier/ast.hh
index f49b59f..38f3b96 100644
--- a/include/compiler/treeifier/ast.hh
+++ b/include/compiler/treeifier/ast.hh
@@ -10,6 +10,7 @@
 
 using namespace std::string_literals;
 using namespace ppc;
+using namespace ppc::lang;
 using namespace ppc::messages;
 
 namespace ppc::comp::tree::ast {
@@ -42,6 +43,8 @@ namespace ppc::comp::tree::ast {
     public:
         msg_stack_t &messages;
         std::vector<token_t> &tokens;
+        std::set<lang::namespace_name_t> imports;
+        located_t<namespace_name_t> nmsp;
 
         void add_parser(std::string name, parser_t &parser);
         void add_parser(std::string name, group_parser_t &parser);
@@ -57,10 +60,7 @@ namespace ppc::comp::tree::ast {
     };
 
     class parser_t {
-    private:
-        std::string _name;
     public:
-        const std::string &name() { return _name; }
         virtual bool parse(ast_ctx_t &ctx, size_t &res_i, data::map_t &out) const = 0;
         bool operator()(ast_ctx_t &ctx, size_t &i, data::map_t &out) const {
             return parse(ctx, i, out);
diff --git a/include/compiler/treeifier/ast/helper.hh b/include/compiler/treeifier/ast/helper.hh
index bf9e53a..e4c0193 100644
--- a/include/compiler/treeifier/ast/helper.hh
+++ b/include/compiler/treeifier/ast/helper.hh
@@ -5,14 +5,19 @@ namespace ppc::comp::tree::ast {
     private:
         ast_ctx_t &ctx;
         size_t &res_i;
-        size_t i;
 
         void throw_ended() {
             if (ended()) throw messages::message_t(message_t::ERROR, "Unexpected end.", loc());
         }
+        void throw_ended(const std::string &reason) {
+            if (ended()) throw messages::message_t(message_t::ERROR, "Unexpected end: " + reason, loc());
+        }
     public:
-        void submit() {
+        size_t i;
+
+        bool submit() {
             res_i = i;
+            return true;
         }
 
         bool ended() {
@@ -83,6 +88,11 @@ namespace ppc::comp::tree::ast {
             i++;
             throw_ended();
         }
+        void advance(const std::string &reason) {
+            throw_ended(reason);
+            i++;
+            throw_ended(reason);
+        }
 
         tree_helper_t(ast_ctx_t &ctx, size_t &i): ctx(ctx), res_i(i) {
             this->i = i;
diff --git a/include/lang/common.hh b/include/lang/common.hh
index 00670ad..69a2137 100644
--- a/include/lang/common.hh
+++ b/include/lang/common.hh
@@ -8,10 +8,9 @@ namespace ppc::lang {
     struct located_t : T {
         location_t location;
 
-        template <class ...Args>
-        located_t(location_t loc, Args ...args): T(args...), location(loc) { }
-        template <class ...Args>
-        located_t(Args ...args): T(args...), location(location_t::NONE) { }
+        located_t(location_t loc, const T &val): T(val), location(loc) { }
+        located_t(const T &val): T(val), location(location_t::NONE) { }
+        located_t() { }
     };
 
     struct namespace_name_t : public std::vector<std::string> {
diff --git a/include/utils/message.hh b/include/utils/message.hh
index 4223d3a..cf3ac52 100644
--- a/include/utils/message.hh
+++ b/include/utils/message.hh
@@ -17,7 +17,7 @@ namespace ppc::messages {
         std::string content;
         location_t location;
 
-        message_t(level_t level, std::string content, location_t loc = location_t::NONE) :
+        message_t(level_t level, const std::string &content, location_t loc = location_t::NONE) :
             level(level),
             content(content),
             location(loc) { }
@@ -25,6 +25,8 @@ namespace ppc::messages {
 
         std::string to_string() const;
         bool is_severe() const;
+
+        static message_t error(const std::string &message, location_t loc = location_t::NONE) { return message_t(ERROR, message, loc); }
     };
 
     struct msg_stack_t {
diff --git a/scripts/common.mak b/scripts/common.mak
index 3b3e241..608e459 100644
--- a/scripts/common.mak
+++ b/scripts/common.mak
@@ -1,14 +1,16 @@
 export lsproj = $(bin)/lsproj$(exe)
 export flags += "-I$(inc)" -D$(OS) -DPPC_VERSION_MAJOR=$(version-major) -DPPC_VERSION_MINOR=$(version-minor) -DPPC_VERSION_BUILD=$(version-build)
 
-rwildcard=$(foreach d,$(wildcard $(1:=/*)),$(call rwildcard,$d,$2) $(filter $(subst *,%,$2),$d))
+rwildcard=$(foreach d, $(wildcard $(1:=/*)),\
+	$(call rwildcard,$d,$2)\
+	$(filter $(subst *,%,$2),$d)\
+)
 
 uniq=$(if $1,$(firstword $1) $(call uniq,$(filter-out $(firstword $1),$1)))
 modoutput=$(shell ./$(lsproj) $(src) $1 output)
 deps=$(strip \
 	$(foreach dep, $(shell ./$(lsproj) $(src) $1 deps),\
-		$(if $(wildcard src/$(dep)),\
-			$(dep),\
+		$(if $(wildcard src/$(dep)), $(dep),\
 			$(error The module '$(dep)' (dependency of '$1') doesn't exist)\
 		)\
 	)\
@@ -29,15 +31,14 @@ lrdeps=$(foreach dep,$(call rdeps,$1),-l$(lib)$(call modoutput,$(dep)))
 modules = $(patsubst $(src)/%/,$(bin)/lib$(lib)%$(so),$(filter-out $(src)/$(mainmodule)/,$(wildcard $(src)/*/)))
 sources = $(call rwildcard,$(src)/$1,*.cc)
 headers = $(call rwildcard,$(inc),*.h)
-binaries = $(patsubst $(src)/%.cc,$(bin)/%.o,$(call sources,$1))
+binaries = $(patsubst $(src)/%.cc,$(bin)/tmp/%.o,$(call sources,$1))
 
 ifneq ($(nolsproj),yes)
-$(shell make -f scripts/lsproj.mak $(lsproj))
+$(shell make -f scripts/lsproj.mak lsproj=$(lsproj) src=$(src) $(lsproj))
 endif
 
-
 .PHONY: build
-.PRECIOUS: $(bin)/%.o
+.PRECIOUS: $(bin)/tmp/%.o
 
 build: $(binary)
 
@@ -53,7 +54,7 @@ $(bin)/lib$(lib)%$(so): $$(call frdeps,$$*) $$(call binaries,$$*)
 	echo Compiling library '$(notdir $@)'...
 	$(CXX) -shared -fPIC $(flags) $(call binaries,$*) -o $@ $(ldflags) $(call ldeps,$*) -L$(bin) "-I$(inc)"
 
-$(bin)/%.o: $(src)/%.cc $(headers)
+$(bin)/tmp/%.o: $(src)/%.cc $(headers)
 	echo - Compiling '$*.cc'...
 	$(call mkdir,$(dir $@))
 	$(CXX) -fPIC -c $(flags) $< -o $@
diff --git a/src/compiler/treeifier/parsers/glob.cc b/src/compiler/treeifier/parsers/glob.cc
index a4627b8..e574e3e 100644
--- a/src/compiler/treeifier/parsers/glob.cc
+++ b/src/compiler/treeifier/parsers/glob.cc
@@ -1,9 +1,59 @@
 #include "compiler/treeifier/ast.hh"
+#include "compiler/treeifier/ast/helper.hh"
 
 namespace ppc::comp::tree::ast {
     class glob_parser_t : public parser_t {
+        bool parse_nmsp(ast_ctx_t &ctx, size_t &res_i, located_t<namespace_name_t> &out) const {
+            tree_helper_t h(ctx, res_i);
+            located_t<namespace_name_t> res;
+
+            while (true) {
+                auto &curr = h.curr();
+
+                if (h.ended() || !curr.is_identifier()) return false;
+                else res.push_back(curr.identifier());
+
+                if (!h.try_advance() || !h.curr().is_operator(operator_t::DOUBLE_COLON)) {
+                    out = res;
+                    return h.submit();
+                }
+            }
+        }
+        bool parse_nmsp_def(ast_ctx_t &ctx, size_t &res_i) const {
+            tree_helper_t h(ctx, res_i);
+            if (h.ended()) return true;
+
+            if (h.curr().is_identifier("namespace")) {
+                h.advance("Expected a namespace name.");
+                if (!parse_nmsp(ctx, h.i, ctx.nmsp)) throw message_t::error("Expected a namespace name.", h.loc());
+                return h.submit();
+            }
+            else return false;
+        }
+        bool parse_import(ast_ctx_t &ctx, size_t &res_i) const {
+            tree_helper_t h(ctx, res_i);
+            if (h.ended()) return true;
+
+            if (h.curr().is_identifier("import")) {
+                h.advance("Expected a namespace name.");
+                located_t<namespace_name_t> name;
+                if (!parse_nmsp(ctx, h.i, name)) throw message_t::error("Expected a namespace name.", h.loc());
+                if (!ctx.imports.emplace(name).second) {
+                    throw message_t::error("The namespace '" + name.to_string() + "' is already imported.", h.loc());
+                }
+                return h.submit();
+            }
+            else return false;
+        }
+
         bool parse(ast_ctx_t &ctx, size_t &res_i, data::map_t &out) const {
-            return false;
+            tree_helper_t h(ctx, res_i);
+            if (h.ended()) return true;
+            parse_nmsp_def(ctx, h.i);
+
+            while (parse_import(ctx, h.i));
+
+            return true;
         }
     };
 
diff --git a/src/compiler/treeifier/parsers/group.cc b/src/compiler/treeifier/parsers/group.cc
index 979c49d..2c4d17c 100644
--- a/src/compiler/treeifier/parsers/group.cc
+++ b/src/compiler/treeifier/parsers/group.cc
@@ -41,12 +41,14 @@ bool group_parser_t::parse(ast_ctx_t &ctx, size_t &i, data::map_t &out) const {
         try {
             return h.parse(*parser, out);
         }
-        catch (std::string) {
+        catch (const message_t &err) {
+            ctx.messages.push(err);
             return false;
         }
     }
-}
 
+    return false;
+}
 
 group_parser_t &group_parser_t::add(parser_t &parser) {
     parsers.push_back(&parser);
diff --git a/src/compiler/treeifier/tokenizer.cc b/src/compiler/treeifier/tokenizer.cc
index c91614f..2063afe 100644
--- a/src/compiler/treeifier/tokenizer.cc
+++ b/src/compiler/treeifier/tokenizer.cc
@@ -52,7 +52,7 @@ static std::vector<char> parse_string(msg_stack_t &msg_stack, bool is_char, lex:
     if (is_char) throw message_t(message_t::ERROR, "Unterminated char literal.", token.location);
     else throw message_t(message_t::ERROR, "Unterminated string literal.", token.location);
 }
-static tok::token_t parse_int(msg_stack_t &msg_stack, lex::token_t token) {
+static token_t parse_int(msg_stack_t &msg_stack, lex::token_t token) {
     enum radix_t {
         BINARY,
         OCTAL,
@@ -119,9 +119,9 @@ static tok::token_t parse_int(msg_stack_t &msg_stack, lex::token_t token) {
         }
     }
 
-    return tok::token_t(res, token.location);
+    return token_t(res, token.location);
 }
-static tok::token_t parse_float(msg_stack_t &msg_stack, lex::token_t token) {
+static token_t parse_float(msg_stack_t &msg_stack, lex::token_t token) {
     double whole = 0, fract = 0;
 
     char c;
@@ -143,16 +143,16 @@ static tok::token_t parse_float(msg_stack_t &msg_stack, lex::token_t token) {
         }
     }
 
-    return tok::token_t(whole + fract, token.location);
+    return token_t(whole + fract, token.location);
 }
 
-tok::token_t tok::token_t::parse(messages::msg_stack_t &msg_stack, lex::token_t in) {
+token_t token_t::parse(messages::msg_stack_t &msg_stack, lex::token_t in) {
     switch (in.type) {
         case lex::token_t::IDENTIFIER:
-            return tok::token_t(in.data, in.location);
+            return token_t(in.data, in.location);
         case lex::token_t::OPERATOR:
             try {
-                auto op = tok::operator_find(in.data);
+                auto op = operator_find(in.data);
                 return token_t(op, in.location);
             }
             catch (std::string &err) {
@@ -176,11 +176,11 @@ tok::token_t tok::token_t::parse(messages::msg_stack_t &msg_stack, lex::token_t
             throw message_t(message_t::ERROR, "Token type not recognised.", in.location);
     }
 }
-std::vector<tok::token_t> tok::token_t::parse_many(messages::msg_stack_t &msg_stack, std::vector<lex::token_t> tokens) {
-    std::vector<tok::token_t> res;
+std::vector<token_t> token_t::parse_many(messages::msg_stack_t &msg_stack, std::vector<lex::token_t> tokens) {
+    std::vector<token_t> res;
 
     for (auto &tok : tokens) {
-        res.push_back(tok::token_t::parse(msg_stack, tok));
+        res.push_back(token_t::parse(msg_stack, tok));
     }
 
     return res;
diff --git a/src/lang/version.cc b/src/lang/version.cc
index 21c2918..a7f0642 100644
--- a/src/lang/version.cc
+++ b/src/lang/version.cc
@@ -4,14 +4,14 @@ using namespace ppc;
 
 bool version_t::operator==(version_t other) const {
     bool major_same = major == other.major;
-    bool minor_same = minor == -1 || other.minor == -1 || minor == other.minor;
-    bool revision_same = revision == -1 || other.revision == -1 || revision == other.revision;
+    bool minor_same = minor == -1u || other.minor == -1 || minor == other.minor;
+    bool revision_same = revision == -1u || other.revision == -1u || revision == other.revision;
 
     return major_same && minor_same && revision_same;
 }
 bool version_t::is_compliant(version_t other) const {
     bool major_compliant = major == other.major;
-    bool minor_compliant = minor == -1 || other.minor == -1 || minor <= other.minor;
+    bool minor_compliant = minor == -1u || other.minor == -1u || minor <= other.minor;
 
     return major_compliant && minor_compliant;
 }
diff --git a/src/main/main.cc b/src/main/main.cc
index fbc052e..bb637ce 100644
--- a/src/main/main.cc
+++ b/src/main/main.cc
@@ -152,11 +152,11 @@ int main(int argc, const char *argv[]) {
     for (const auto &file : files) {
         std::ifstream f { file, std::ios_base::in };
         try {
-            auto res = tok::token_t::parse_many(msg_stack, lex::token_t::parse_file(msg_stack, file, f));
+            auto res = token_t::parse_many(msg_stack, lex::token_t::parse_file(msg_stack, file, f));
 
             for (auto tok : res) {
                 if (tok.is_identifier()) std::cout << "Identifier: \t" << tok.identifier();
-                if (tok.is_operator()) std::cout << "Operator: \t" << tok::operator_stringify(tok._operator());
+                if (tok.is_operator()) std::cout << "Operator: \t" << operator_stringify(tok._operator());
                 if (tok.is_float_lit()) std::cout << "Float: \t" << tok.float_lit();
                 if (tok.is_int_lit()) std::cout << "Int: \t" << tok.int_lit();
                 if (tok.is_char_lit()) std::cout << "Char: \t" << tok.char_lit();