parser generator beginnings

src/parser.hpp

@@ -0,0 +1,87 @@
+#ifndef ZIG_PARSER_HPP
+#define ZIG_PARSER_HPP
+
+#include "list.hpp"
+#include "buffer.hpp"
+#include "tokenizer.hpp"
+
+struct AstNode;
+
+enum NodeType {
+    NodeTypeRoot,
+    NodeTypeFnDecl,
+    NodeTypeParamDecl,
+    NodeTypeType,
+    NodeTypePointerType,
+    NodeTypeBlock,
+    NodeTypeStatement,
+    NodeTypeExpressionStatement,
+    NodeTypeReturnStatement,
+    NodeTypeExpression,
+    NodeTypeFnCall,
+};
+
+struct AstNodeRoot {
+    ZigList<AstNode *> fn_decls;
+};
+
+struct AstNodeFnDecl {
+    Buf name;
+    ZigList<AstNode *> params;
+    AstNode *return_type;
+    AstNode *body;
+};
+
+struct AstNodeParamDecl {
+    Buf name;
+    AstNode *type;
+};
+
+enum AstNodeTypeType {
+    AstNodeTypeTypePrimitive,
+    AstNodeTypeTypePointer,
+};
+
+struct AstNodeType {
+    AstNodeTypeType type;
+    AstNode *child;
+};
+
+struct AstNodePointerType {
+    AstNode *const_or_mut;
+    AstNode *type;
+};
+
+struct AstNodeBlock {
+    ZigList<AstNode *> expressions;
+};
+
+struct AstNodeExpression {
+    AstNode *child;
+};
+
+struct AstNodeFnCall {
+    Buf name;
+    ZigList<AstNode *> params;
+};
+
+struct AstNode {
+    enum NodeType type;
+    AstNode *parent;
+    union {
+        AstNodeRoot root;
+        AstNodeFnDecl fn_decl;
+        AstNodeType type;
+        AstNodeParamDecl param_decl;
+        AstNodeBlock block;
+        AstNodeExpression expression;
+        AstNodeFnCall fn_call;
+    } data;
+};
+
+__attribute__ ((format (printf, 2, 3)))
+void ast_error(Token *token, const char *format, ...);
+
+AstNode * ast_parse(Buf *buf, ZigList<Token> *tokens);
+
+#endif