Add 'stage0/' from commit 'b3d106ec971300a9c745f4681fab3df7518c4346'

git-subtree-dir: stage0
git-subtree-mainline: 3db960767d
git-subtree-split: b3d106ec97

stage0/parser.h

@@ -0,0 +1,44 @@
+// parser.h
+#ifndef _ZIG0_PARSE_H__
+#define _ZIG0_PARSE_H__
+
+#include "ast.h"
+#include "common.h"
+#include <setjmp.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
+
+typedef struct {
+    const char* source;
+    uint32_t source_len;
+
+    TokenizerTag* token_tags;
+    AstIndex* token_starts;
+    uint32_t tokens_len;
+
+    AstTokenIndex tok_i;
+
+    AstNodeList nodes;
+    AstNodeIndexSlice extra_data;
+    AstNodeIndexSlice scratch;
+    jmp_buf error_jmp;
+    char* err_buf;
+} Parser;
+
+#define PARSE_ERR_BUF_SIZE 200
+
+_Noreturn static inline void fail(Parser* p, const char* msg) {
+    size_t len = strlen(msg);
+    if (len >= PARSE_ERR_BUF_SIZE)
+        len = PARSE_ERR_BUF_SIZE - 1;
+    memcpy(p->err_buf, msg, len);
+    p->err_buf[len] = '\0';
+    longjmp(p->error_jmp, 1);
+}
+
+Parser* parserInit(const char* source, uint32_t len);
+void parserDeinit(Parser* parser);
+void parseRoot(Parser* parser);
+
+#endif