added structure & interpreter & lexer & first ast stucture

doc/definition.txt

@@ -0,0 +1,29 @@
+keywords:
+    builtin-functions:
+        output
+        input
+        range
+        length
+
+    pass
+    if
+    elseif
+    else
+
+
+global vars:
+    error:
+        code
+        msg
+
+    sys:
+        os_name
+
+data types:
+    empty
+    any
+    string
+    number
+    bool
+    list
+    dict

doc/error_codes.txt

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+Interpreter:
+    1.0 Start failed
+    1.1 File not found
+
+Runtime:
+    2.0 Unknown keyword
+    2.1 Unknown type
+    2.2 Unknown variable
+    2.3 Unknown function
+    2.4 Unknown class
+    2.5 Unknown library
+    2.6 Access error: no export
+    2.7 Expression error

doc/target/main.bl

@@ -0,0 +1,16 @@
+use test1 from Tests;
+use test2 as test3 from Tests;
+
+lib Main {
+    class Program {
+        func Main(args: list): void {
+            test_a = test1();
+            test_a.dec_vars();
+            test_a.is_error();
+            if (!error) {
+                test_b = test3();
+                test3.continue();
+            }
+        }
+    }
+}

doc/target/test.bl

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+lib Tests
+{
+    /*
+        declaration of some tests
+    */
+    export class test1
+    {
+        export test_string: string = 'Hello';
+        export test_string_2: string = "Hello World";
+        export test_num: num = 1;
+        export test_num_2: num = 1.0;
+        export test_num_3: num = this.test_num + this.test_num_2;
+
+        export func dec_vars(): void
+        {
+            test_bool: bool = true;
+            test_bool_2: bool = false;
+            test_bool_3: bool = test_bool != test_bool_2;   # true
+        }
+
+        export is_error(): bool
+        {
+            if (error != empty)
+            {
+                output(error.code + ' ' + error.message);
+            }
+            else
+            {
+                output('continue');
+            }
+        }
+    }
+}

doc/target/test2.bl

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+lib Tests {
+    export class test2 {
+        string_a = string1();
+        export func continue() {
+            input(string_a.string1 + ': ');
+        }
+    }
+
+    class strings {
+        public string1 = "hello world";
+    }
+}

doc/test.bl

@@ -0,0 +1,31 @@
+// hi1
+# hi2
+/*
+    hi3
+*/
+
+lib Main {
+    class Program {
+        func Main() {
+            testBool: bool;
+            testEmpty: emptyType = empty;
+            output('Hello World');
+            output(66);
+            output(3 + 3);
+            test: string = input('# ');
+            output(test);
+            output(false);
+
+            if (testBool != empty) {
+                output(testEmpty);
+            }
+            test1234(range(0, 10));
+        }
+
+        public func test1234(param: list) {
+            for i in range(0, length(param)) {
+                output(i);
+            }
+        }
+    }
+}