harec

commit b28fe5aa427edb710a2aa4b0996e90ad61727dac
parent aaceda710f77c7337c774278bd99cc91495a5976
Author: Drew DeVault <sir@cmpwn.com>
Date:   Sun,  1 Nov 2020 15:10:41 -0500

Initial scaffolding for parser

Diffstat:
M
configure
 | 
1
+
A
include/ast.h
 | 
48
++++++++++++++++++++++++++++++++++++++++++++++++
A
include/identifier.h
 | 
9
+++++++++
A
include/parse.h
 | 
11
+++++++++++
M
src/main.c
 | 
37
++++---------------------------------
A
src/parse.c
 | 
46
++++++++++++++++++++++++++++++++++++++++++++++

6 files changed, 119 insertions(+), 33 deletions(-)
diff --git a/configure b/configure
@@ -6,6 +6,7 @@ harec() {
 	genrules harec \
 		src/lex.c \
 		src/main.c \
+		src/parse.c \
 		src/utf8.c
 }
 
diff --git a/include/ast.h b/include/ast.h
@@ -0,0 +1,48 @@
+#ifndef HARE_AST_H
+#define HARE_AST_H
+#include "identifier.h"
+
+enum ast_import_mode {
+	AST_IMPORT_IDENTIFIER,	// use foo::bar;
+	AST_IMPORT_ALIAS,	// use foo::bar = x::y;
+	AST_IMPORT_MEMBERS,	// use foo::bar::{a, b, c};
+};
+
+struct ast_imports {
+	enum ast_import_mode mode;
+	union {
+		struct identifier ident;
+		struct identifier *alias;
+		struct ast_imports *members;
+	};
+	struct ast_imports *next;
+};
+
+enum ast_declaration_type {
+	AST_DECL_FUNC,
+	AST_DECL_TYPE,
+	AST_DECL_VAR,
+	AST_DECL_CONST,
+};
+
+struct ast_declaration {
+	enum ast_declaration_type type;
+};
+
+struct ast_declarations {
+	struct ast_declaration decl;
+	struct ast_declarations *next;
+};
+
+struct ast_subunit {
+	struct ast_imports *imports;
+	struct ast_declarations decls;
+	struct ast_subunit *next;
+};
+
+struct ast_unit {
+	struct identifier *ns;
+	struct ast_subunit subunits;
+};
+
+#endif
diff --git a/include/identifier.h b/include/identifier.h
@@ -0,0 +1,9 @@
+#ifndef HARE_IDENTIFIER_H
+#define HARE_IDENTIFIER_H
+
+struct identifier {
+	char *name;
+	struct identifier *ns;
+};
+
+#endif
diff --git a/include/parse.h b/include/parse.h
@@ -0,0 +1,11 @@
+#ifndef HAREC_PARSE_H
+#define HAREC_PARSE_H
+#include <stdio.h>
+
+struct ast_unit;
+struct identifier;
+struct lexer;
+
+void parse(struct lexer *lexer, struct identifier *ns, struct ast_unit *unit);
+
+#endif
diff --git a/src/main.c b/src/main.c
@@ -1,6 +1,7 @@
 #include <stdio.h>
+#include "ast.h"
 #include "lex.h"
-#include "utf8.h"
+#include "parse.h"
 
 int
 main(int argc, char *argv[])
@@ -8,38 +9,8 @@ main(int argc, char *argv[])
 	struct lexer lexer;
 	lex_init(&lexer, stdin);
 
-	struct token tok;
-	while (tok.token != T_EOF) {
-		token_finish(&tok);
-		lex(&lexer, &tok);
-		switch (tok.token) {
-		case T_NAME:
-			fprintf(stderr, "'%s'\n", tok.name);
-			break;
-		case T_LITERAL:
-			fprintf(stderr, "(%s)\n", tok.literal);
-			break;
-		case T_RUNE:
-			putc('\'', stderr);
-			utf8_fputch(stderr, tok.rune);
-			putc('\'', stderr);
-			putc('\n', stderr);
-			break;
-		case T_STRING:
-			fprintf(stderr, "\"%*s\"\n", (int)tok.string.len,
-				tok.string.value);
-			break;
-		case T_ERROR:
-			fprintf(stderr, "ERROR\n");
-			break;
-		case T_EOF:
-			fprintf(stderr, "EOF\n");
-			break;
-		default:
-			fprintf(stderr, "%s\n", token_str(&tok));
-			break;
-		}
-	};
+	struct ast_unit unit;
+	parse(&lexer, NULL, &unit);
 
 	lex_finish(&lexer);
 	return 0;
diff --git a/src/parse.c b/src/parse.c
@@ -0,0 +1,46 @@
+#include <stdio.h>
+#include "ast.h"
+#include "identifier.h"
+#include "lex.h"
+#include "parse.h"
+#include "utf8.h"
+
+void
+parse(struct lexer *lexer, struct identifier *ns, struct ast_unit *unit)
+{
+	struct token tok = {0};
+
+	while (tok.token != T_EOF) {
+		token_finish(&tok);
+		lex(lexer, &tok);
+		switch (tok.token) {
+		case T_NAME:
+			fprintf(stderr, "'%s'\n", tok.name);
+			break;
+		case T_LITERAL:
+			fprintf(stderr, "(%s)\n", tok.literal);
+			break;
+		case T_RUNE:
+			putc('\'', stderr);
+			utf8_fputch(stderr, tok.rune);
+			putc('\'', stderr);
+			putc('\n', stderr);
+			break;
+		case T_STRING:
+			fprintf(stderr, "\"%*s\"\n", (int)tok.string.len,
+				tok.string.value);
+			break;
+		case T_ERROR:
+			fprintf(stderr, "ERROR\n");
+			break;
+		case T_EOF:
+			fprintf(stderr, "EOF\n");
+			break;
+		default:
+			fprintf(stderr, "%s\n", token_str(&tok));
+			break;
+		}
+	};
+
+	token_finish(&tok);
+}