From a987479617dd333353f22b67f2637df5e7ed4486 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Motiejus=20Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Wed, 8 Jan 2025 18:35:04 +0100
Subject: [PATCH] beginning of parseVarDeclProto

---
 .clang-format |   1 +
 parser.c      | 112 +++++++++++++++++++++++++++++++++++++++++++++-----
 2 files changed, 103 insertions(+), 10 deletions(-)

diff --git a/.clang-format b/.clang-format
index d1078a7..3aff6ad 100644
--- a/.clang-format
+++ b/.clang-format
@@ -1,2 +1,3 @@
 BasedOnStyle: WebKit
 BreakBeforeBraces: Attach
+ColumnLimit: 80
diff --git a/parser.c b/parser.c
index 2eedf77..5c4244f 100644
--- a/parser.c
+++ b/parser.c
@@ -508,8 +508,109 @@ static AstNodeIndex parseAssignExpr(Parser* p) {
     return 0; // tcc
 }
 
+static AstNodeIndex parseVarDeclProto(Parser* p) {
+    if (eatToken(p, TOKEN_KEYWORD_CONST) == null_token || eatToken(p, TOKEN_KEYWORD_VAR) == null_token)
+        return null_node;
+
+    fprintf(stderr, "parseVarDeclProto: parsing vars is not supported\n");
+    exit(1);
+    return 0; // tcc
+}
+
+typedef struct {
+    int8_t prec;
+    AstNodeTag tag;
+    enum {
+        ASSOC_LEFT,
+        ASSOC_NONE,
+    } assoc;
+} OperInfo;
+
+static OperInfo operTable(TokenizerTag tok_tag) {
+    switch (tok_tag) {
+    case TOKEN_KEYWORD_OR:
+        return (OperInfo) { .prec = 10, .tag = AST_NODE_BOOL_OR };
+    case TOKEN_KEYWORD_AND:
+        return (OperInfo) { .prec = 20, .tag = AST_NODE_BOOL_AND };
+
+    case TOKEN_EQUAL_EQUAL:
+        return (OperInfo) { .prec = 30, .tag = AST_NODE_EQUAL_EQUAL, .assoc = ASSOC_NONE };
+    case TOKEN_BANG_EQUAL:
+        return (OperInfo) { .prec = 30, .tag = AST_NODE_BANG_EQUAL, .assoc = ASSOC_NONE };
+    case TOKEN_ANGLE_BRACKET_LEFT:
+        return (OperInfo) { .prec = 30, .tag = AST_NODE_LESS_THAN, .assoc = ASSOC_NONE };
+    case TOKEN_ANGLE_BRACKET_RIGHT:
+        return (OperInfo) { .prec = 30, .tag = AST_NODE_GREATER_THAN, .assoc = ASSOC_NONE };
+    case TOKEN_ANGLE_BRACKET_LEFT_EQUAL:
+        return (OperInfo) { .prec = 30, .tag = AST_NODE_LESS_OR_EQUAL, .assoc = ASSOC_NONE };
+    case TOKEN_ANGLE_BRACKET_RIGHT_EQUAL:
+        return (OperInfo) { .prec = 30, .tag = AST_NODE_GREATER_OR_EQUAL, .assoc = ASSOC_NONE };
+
+    case TOKEN_AMPERSAND:
+        return (OperInfo) { .prec = 40, .tag = AST_NODE_BIT_AND };
+    case TOKEN_CARET:
+        return (OperInfo) { .prec = 40, .tag = AST_NODE_BIT_XOR };
+    case TOKEN_PIPE:
+        return (OperInfo) { .prec = 40, .tag = AST_NODE_BIT_OR };
+    case TOKEN_KEYWORD_ORELSE:
+        return (OperInfo) { .prec = 40, .tag = AST_NODE_ORELSE };
+    case TOKEN_KEYWORD_CATCH:
+        return (OperInfo) { .prec = 40, .tag = AST_NODE_CATCH };
+
+    case TOKEN_ANGLE_BRACKET_ANGLE_BRACKET_LEFT:
+        return (OperInfo) { .prec = 50, .tag = AST_NODE_SHL };
+    case TOKEN_ANGLE_BRACKET_ANGLE_BRACKET_LEFT_PIPE:
+        return (OperInfo) { .prec = 50, .tag = AST_NODE_SHL_SAT };
+    case TOKEN_ANGLE_BRACKET_ANGLE_BRACKET_RIGHT:
+        return (OperInfo) { .prec = 50, .tag = AST_NODE_SHR };
+
+    case TOKEN_PLUS:
+        return (OperInfo) { .prec = 60, .tag = AST_NODE_ADD };
+    case TOKEN_MINUS:
+        return (OperInfo) { .prec = 60, .tag = AST_NODE_SUB };
+    case TOKEN_PLUS_PLUS:
+        return (OperInfo) { .prec = 60, .tag = AST_NODE_ARRAY_CAT };
+    case TOKEN_PLUS_PERCENT:
+        return (OperInfo) { .prec = 60, .tag = AST_NODE_ADD_WRAP };
+    case TOKEN_MINUS_PERCENT:
+        return (OperInfo) { .prec = 60, .tag = AST_NODE_SUB_WRAP };
+    case TOKEN_PLUS_PIPE:
+        return (OperInfo) { .prec = 60, .tag = AST_NODE_ADD_SAT };
+    case TOKEN_MINUS_PIPE:
+        return (OperInfo) { .prec = 60, .tag = AST_NODE_SUB_SAT };
+
+    case TOKEN_PIPE_PIPE:
+        return (OperInfo) { .prec = 70, .tag = AST_NODE_MERGE_ERROR_SETS };
+    case TOKEN_ASTERISK:
+        return (OperInfo) { .prec = 70, .tag = AST_NODE_MUL };
+    case TOKEN_SLASH:
+        return (OperInfo) { .prec = 70, .tag = AST_NODE_DIV };
+    case TOKEN_PERCENT:
+        return (OperInfo) { .prec = 70, .tag = AST_NODE_MOD };
+    case TOKEN_ASTERISK_ASTERISK:
+        return (OperInfo) { .prec = 70, .tag = AST_NODE_ARRAY_MULT };
+    case TOKEN_ASTERISK_PERCENT:
+        return (OperInfo) { .prec = 70, .tag = AST_NODE_MUL_WRAP };
+    case TOKEN_ASTERISK_PIPE:
+        return (OperInfo) { .prec = 70, .tag = AST_NODE_MUL_SAT };
+
+    default:
+        return (OperInfo) { .prec = -1, .tag = AST_NODE_ROOT };
+    }
+}
+
 static AstNodeIndex expectVarDeclExprStatement(Parser* p) {
-    (void)p;
+    CleanupScratch scratch_top __attribute__((__cleanup__(cleanupScratch))) = initCleanupScratch(p);
+
+    // while(true) {
+    //     const AstNodeIndex var_decl_proto = parseVarDeclProto(p);
+    //     if (var_decl_proto != 0) {
+    //         SLICE_APPEND(AstNodeIndex, &p->scratch, var_decl_proto);
+    //     } else {
+
+    //    }
+    //}
+
     fprintf(stderr, "expectVarDeclExprStatement not implemented\n");
     exit(1);
     return 0; // tcc
@@ -639,15 +740,6 @@ static AstNodeIndex parseLabeledStatement(Parser* p) {
     return null_node;
 }
 
-static AstNodeIndex parseVarDeclProto(Parser* p) {
-    if (eatToken(p, TOKEN_KEYWORD_CONST) == null_token || eatToken(p, TOKEN_KEYWORD_VAR) == null_token)
-        return null_node;
-
-    fprintf(stderr, "parseVarDeclProto: parsing vars is not supported\n");
-    exit(1);
-    return 0; // tcc
-}
-
 static AstNodeIndex parseGlobalVarDecl(Parser* p) {
     const AstNodeIndex var_decl = parseVarDeclProto(p);
     if (var_decl == 0) {