From a52fdf470aa2c164108aeccc2c83bad62208913c Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Sat, 9 Mar 2019 14:14:09 +0100
Subject: Start on resolving ast. Add recursive declaration check

---
 include/ast.h       | 25 +++++++++++++++++++++----
 include/defs.h      |  1 +
 include/parser.h    |  4 ++--
 include/tokenizer.h |  3 +--
 4 files changed, 25 insertions(+), 8 deletions(-)

(limited to 'include')

diff --git a/include/ast.h b/include/ast.h
index 1d40a89..f0020d7 100644
--- a/include/ast.h
+++ b/include/ast.h
@@ -1,6 +1,7 @@
 #ifndef AMALGAM_AST_H
 #define AMALGAM_AST_H
 
+#include "defs.h"
 #include "std/buffer_view.h"
 #include "std/buffer.h"
 #include "std/misc.h"
@@ -8,6 +9,8 @@
 #include "std/hash_map.h"
 #include "binop_type.h"
 
+#include <setjmp.h>
+
 /* General error */
 #define AST_ERR -1
 #define AST_ERR_DEF_DUP -20
@@ -45,9 +48,16 @@ typedef enum {
     AST_BINOP
 } AstType;
 
+typedef enum {
+    AST_NOT_RESOLVED,
+    AST_RESOLVING,
+    AST_RESOLVED
+} AstResolveStatus;
+
 typedef struct {
     AstValue value;
     AstType type;
+    AstResolveStatus resolve_status;
 } Ast;
 
 struct Scope {
@@ -56,17 +66,16 @@ struct Scope {
 };
 
 struct FunctionDecl {
-    BufferView name;
     Scope body;
 };
 
 struct FunctionCall {
     BufferView name;
-    Buffer args;
+    Buffer/*Ast*/ args;
 };
 
 struct LhsExpr {
-    int isConst;
+    int is_const;
     BufferView type_name;
     BufferView var_name;
     Ast rhs_expr;
@@ -90,6 +99,7 @@ struct Number {
 
 struct Variable {
     BufferView name;
+    Ast resolved_variable;
 };
 
 struct Binop {
@@ -100,7 +110,13 @@ struct Binop {
     bool grouped;
 };
 
+typedef struct {
+    jmp_buf env;
+    Parser *parser;
+} AstCompilerContext;
+
 Ast ast_none();
+void ast_init(Ast *self, AstValue value, AstType type);
 BufferView ast_get_name(Ast *self);
 
 CHECK_RESULT int funcdecl_init(FunctionDecl *self, ScopedAllocator *allocator);
@@ -109,10 +125,11 @@ void lhsexpr_init(LhsExpr *self, int isConst, BufferView var_name);
 void import_init(Import *self, BufferView path);
 CHECK_RESULT int string_init(String *self, BufferView str);
 void number_init(Number *self, i64 value, bool is_integer);
+void variable_init(Variable *self, BufferView name);
 void binop_init(Binop *self);
 
 CHECK_RESULT int scope_init(Scope *self, ScopedAllocator *allocator);
 CHECK_RESULT int scope_add_child(Scope *self, Ast *child);
-void scope_resolve(Scope *self);
+void scope_resolve(Scope *self, AstCompilerContext *context);
 
 #endif
diff --git a/include/defs.h b/include/defs.h
index 2baceb4..6a9bca4 100644
--- a/include/defs.h
+++ b/include/defs.h
@@ -3,5 +3,6 @@
 
 typedef struct ParserThreadData ParserThreadData;
 typedef struct amal_compiler amal_compiler;
+typedef struct Parser Parser;
 
 #endif
diff --git a/include/parser.h b/include/parser.h
index 5c055d9..20f02fe 100644
--- a/include/parser.h
+++ b/include/parser.h
@@ -32,7 +32,7 @@ typedef enum {
     ERROR_CONTEXT_RHS_START
 } ErrorContext;
 
-typedef struct {
+struct Parser {
     Tokenizer tokenizer;
     Scope scope;
     ScopedAllocator *allocator; /* borrowed. Copied from @compiler for faster access to allocator */
@@ -41,7 +41,7 @@ typedef struct {
     TokenizerError error;
     ErrorContext error_context;
     jmp_buf parse_env;
-} Parser;
+};
 
 CHECK_RESULT int parser_thread_data_init(ParserThreadData *self);
 CHECK_RESULT int parser_thread_data_deinit(ParserThreadData *self);
diff --git a/include/tokenizer.h b/include/tokenizer.h
index b38cc58..a06b689 100644
--- a/include/tokenizer.h
+++ b/include/tokenizer.h
@@ -36,7 +36,6 @@ typedef struct {
     BufferView code;
     int index;
     int prev_index;
-    int line;
     Token token;
     /*
     @needs_update is an optimization when running tokenizer_consume_if. If expected_token is wrong and tokenizer_consume_if is called again,
@@ -68,7 +67,7 @@ CHECK_RESULT int tokenizer_accept(Tokenizer *self, Token expected_token);
    otherwise @result is set to 1
 */
 CHECK_RESULT int tokenizer_consume_if(Tokenizer *self, Token expected_token, bool *result);
-void tokenizer_print_error(Tokenizer *self, const char *fmt, ...);
+void tokenizer_print_error(Tokenizer *self, int index, const char *fmt, ...);
 void tokenizer_print_error_object(Tokenizer *self, TokenizerError *error);
 TokenizerError tokenizer_create_error(Tokenizer *self, int index, const char *fmt, ...);
 int tokenizer_get_error_index(Tokenizer *self);
-- 
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