Allow global-scope declarations

Function-local scope is still WIP, but you can now define things outside of function blocks.

.gitignore

@@ -0,0 +1,6 @@
+.idea
+.vscode
+
+out
+bin
+

include/Defs.h

@@ -51,6 +51,7 @@ enum TokenTypes {
     LI_RPARE,       // )
 
     LI_AMP,         // &
+    LI_COM,         // ,
 
     TY_IDENTIFIER,  // Identifier name. Variable, function, etc.
     TY_NONE,        // No return type. Literal void.
@@ -229,14 +230,16 @@ struct ASTNode* ParsePrimary(void);
 struct ASTNode* ParseStatement(void);
 struct ASTNode* PrefixStatement();
 
-struct ASTNode* ParseFunction();
+void ParseGlobals();
+
+struct ASTNode* ParseFunction(int Type);
 struct ASTNode* ParseCompound();
 
 
 struct ASTNode* CallFunction();
 struct ASTNode* ReturnStatement();
 
-int ParsePointer();
+int ParseOptionalPointer();
 int ValueAt(int Type);
 int PointerTo(int Type);
 
@@ -331,7 +334,7 @@ void AsFunctionEpilogue(int ID);
  * * * *     D E C L A R A T I O N     * * * *
  * * * * * * * * * * * * * * * * * * * * * * */
 
-void BeginVariableDeclaration(void);
+void BeginVariableDeclaration(int Type);
 struct ASTNode* ParseIdentifier(void);
 
 struct ASTNode* IfStatement();

src/Lexer.c

@@ -223,6 +223,10 @@ int Tokenise(struct Token* Token) {
             Token->type = LI_AMP;
             break;
         
+        case ',':
+            Token->type = LI_COM;
+            break;
+        
         case '=':
             Char = NextChar();
             // If the next char is =, we have ==, the compare equality token.

src/Main.c

@@ -79,14 +79,9 @@ int main(int argc, char* argv[]) {
 
     AssemblerPreamble();
 
-    while(1) {
-        Node = ParseFunction();
-        printf("\nBeginning assembler creation of new function %s\n", Symbols[Node->Value.ID].Name);
-        AssembleTree(Node, -1, 0);
+    ParseGlobals();
 
-        if(CurrentToken.type == LI_EOF)
-            break;
-    }
+    //AsFunctionEpilogue();
 
     //Node = ParsePrecedenceASTNode();
     //printf("%d\n", ParseAST(Node));

src/Parser.c

@@ -333,7 +333,7 @@ struct ASTNode* CallFunction() {
  * * * * * * * * * * * * * * * * * * * * * */
 
 struct ASTNode* ParseStatement(void) {
-
+    int Type;
 
     switch(CurrentToken.type) {
 
@@ -344,7 +344,9 @@ struct ASTNode* ParseStatement(void) {
         case TY_LONG:
         case TY_INT:
             printf("\t\tNew Variable: %s\n", CurrentIdentifier);
-            BeginVariableDeclaration();
+            Type = ParseOptionalPointer(CurrentToken.type);
+            VerifyToken(TY_IDENTIFIER, "ident");
+            BeginVariableDeclaration(Type);
             return NULL;
         
         case TY_IDENTIFIER:
@@ -403,6 +405,38 @@ struct ASTNode* ParseCompound() {
     }
 }
 
+void ParseGlobals() {
+    struct ASTNode* Tree;
+    int Type, FunctionComing;
+
+    printf("Parsing global definitions\n");
+
+    while(1) {
+        Type = ParseOptionalPointer();
+
+        //TODO: converge pathways on this block?
+        if(CurrentToken.type == KW_FUNC) {
+            VerifyToken(KW_FUNC, "::");
+            FunctionComing = 1;
+        }
+
+        VerifyToken(TY_IDENTIFIER, "ident");
+
+        if(FunctionComing && CurrentToken.type == LI_LPARE) {
+            printf("\tParsing function");
+            Tree = ParseFunction(Type);
+            printf("\nBeginning assembler creation of new function %s\n", Symbols[Tree->Value.ID].Name);
+            AssembleTree(Tree, -1, 0);
+        } else {
+            printf("\tParsing global variable declaration\n");
+            BeginVariableDeclaration(Type);
+        }
+
+        if(CurrentToken.type == LI_EOF)
+            break;
+        
+    }
+}
 
 
 /* void ParseStatements() {

src/Pointers.c

@@ -36,15 +36,16 @@ int ValueAt(int Type) {
     return -1;
 }
 
-int ParsePointer() {
+int ParseOptionalPointer() {
 
     int Type;
     // TODO: THIS IS WRONG AND SHOULD NOT EXIST
-    // TY_CHAR is 21, RET_CHAR is 1.
+    // TY_CHAR is 22, RET_CHAR is 1.
     // Offset is 20. Rest are in order
 
     if(CurrentToken.type >= TY_CHAR && CurrentToken.type <= TY_VOID) {
-        Type = CurrentToken.type - 20;
+        Type = CurrentToken.type - 21;
+        printf("\t\tConverting a %d type to a %d type.\n", CurrentToken.type, Type);
     } else {
         DieDecimal("Illegal type for pointerisation", CurrentToken.type);
     }

src/Statements.c

@@ -126,29 +126,37 @@ int TypesCompatible(int* Left, int* Right, int STRICT) {
  * //TODO: int i = 5;
  * 
  */
-void BeginVariableDeclaration(void) {
+void BeginVariableDeclaration(int Type) {
     int ID;
-    int Type = ParsePointer(CurrentToken.type);
     //printf("type: %s\n", Types[Type]);
     
-    VerifyToken(TY_IDENTIFIER, "ident");
+    while(1) {
     //printf("Identifier: %s\n", CurrentIdentifier);
+        printf("Adding symbol %s of type %s.\n", CurrentIdentifier, TypeNames[Type]);
+        ID = AddSymbol(CurrentIdentifier, Type, ST_VAR);
+        AsNewSymb(ID);
 
-    ID = AddSymbol(CurrentIdentifier, Type, ST_VAR);
-    AsNewSymb(ID);
+        if(CurrentToken.type == LI_SEMIC) {
+            printf("\tEnd of variables to declare in this statement\n");
+            Tokenise(&CurrentToken);
+            return;
+        }
 
-    VerifyToken(LI_SEMIC, ";");
+        if(CurrentToken.type == LI_COM) {
+            printf("\t\tStatement appears to continue. Integrating new variable.\n");
+            Tokenise(&CurrentToken);
+            VerifyToken(TY_IDENTIFIER, "ident");
+            continue;
+        }
+
+        DieDecimal("\nExpected ; after identifier, found", CurrentToken.type);
+    }
 }
 
-struct ASTNode* ParseFunction() {
+struct ASTNode* ParseFunction(int Type) {
     struct ASTNode* Tree;
     struct ASTNode* FinalStatement;
-    int SymbolSlot, BreakLabel, Type;
-
-    Type = ParsePointer(CurrentToken.type);
-
-    VerifyToken(KW_FUNC, "::");
-    VerifyToken(TY_IDENTIFIER, "ident");
+    int SymbolSlot, BreakLabel;
 
     printf("\nIdentified function %s\n", CurrentIdentifier);
 

tests/globals

@@ -0,0 +1,16 @@
+int x, y;
+int* z;
+
+void :: main() {
+    int a, b, c;
+
+    b = 3; c = 8;
+    a = b + c * 10;
+    PrintInteger(a);
+
+    x = 12; PrintInteger(x);
+    z = &x;
+    y = *z;
+    PrintInteger(y);
+
+}