From 50e64bed4bc38e949d440d83337a90b8c011a4c7 Mon Sep 17 00:00:00 2001
From: Leo Tenenbaum <pommicket@gmail.com>
Date: Fri, 10 Jan 2020 11:52:35 -0500
Subject: importing locations

---
 err.c     | 35 +++++++++++++++++------------------
 main.c    |  1 -
 package.c |  8 ++++++++
 types.h   |  9 ++++++++-
 4 files changed, 33 insertions(+), 20 deletions(-)

diff --git a/err.c b/err.c
index 2472d3d..1307a15 100644
--- a/err.c
+++ b/err.c
@@ -81,37 +81,37 @@ static void err_vfprint(const char *fmt, va_list args) {
 	vfprintf(stderr, fmt, args);
 }
 
+static void err_print_line_file(Location where) {
+	if (where.start) {
+		err_fprint(" at line %lu of %s:\n", (unsigned long)where.start->pos.line, where.start->pos.ctx->filename);
+	} else if (where.simple_location) {
+		err_fprint(" at line %lu of %s:\n", (unsigned long)where.simple_location->line, where.simple_location->ctx->filename);
+	} else {
+		err_fprint(":\n");
+
+	}
+	
+}
+
 static void err_print_header_(Location where) {
 	SourcePos start_pos = where.start->pos;
 	ErrCtx *ctx = start_pos.ctx;
 	err_text_err(ctx, "error");
-	if (!where.start)
-		err_fprint(":\n");
-	else {
-		err_fprint(" at line %lu of %s:\n", (unsigned long)start_pos.line, ctx->filename);
-	}
+	err_print_line_file(where);
 }
 
 static void info_print_header_(Location where) {
 	SourcePos start_pos = where.start->pos;
 	ErrCtx *ctx = start_pos.ctx;
 	err_text_info(ctx, "info");
-	if (!where.start)
-		err_fprint(":\n");
-	else {
-		err_fprint(" at line %lu of %s:\n", (unsigned long)start_pos.line, ctx->filename);
-	}
+	err_print_line_file(where);
 }
 
 static void warn_print_header_(Location where) {
 	SourcePos start_pos = where.start->pos;
 	ErrCtx *ctx = start_pos.ctx;
 	err_text_warn(ctx, "warning");
-	if (!where.start)
-		err_fprint(":\n");
-	else {
-		err_fprint(" at line %lu of %s:\n", (unsigned long)start_pos.line, ctx->filename);
-	}
+	err_print_line_file(where);
 }
 
 static void err_print_pos_text(ErrCtx *ctx, U32 start_pos, U32 end_pos) {
@@ -162,8 +162,6 @@ static void err_print_location_text(Location where) {
 	if (where.start) {
 		ErrCtx *ctx = where.start->pos.ctx;
 		err_print_pos_text(ctx, where.start->pos.start, where.end[-1].pos.end);
-	} else {
-		err_fprint("\t<no location available>");
 	}
 	
 }
@@ -182,11 +180,12 @@ static void err_print_footer_(Location where) {
 
 /* Write nicely-formatted errors to the error file */
 
-
 static void err_vprint(Location where, const char *fmt, va_list args) {
 	if (location_is_ctx_disabled(where)) return;
 	if (where.start) {
 		where.start->pos.ctx->have_errored = true;
+	} else if (where.simple_location) {
+		where.simple_location->ctx->have_errored = true;
 	}
 	err_print_header_(where);
 	err_vfprint(fmt, args);
diff --git a/main.c b/main.c
index 5c0e800..e80f892 100644
--- a/main.c
+++ b/main.c
@@ -18,7 +18,6 @@
 
 /* 
 TODO:
-test EOF error
 packages
 ---
 X ::= newtype(int); or something
diff --git a/package.c b/package.c
index 1ad2c4f..beb7b0a 100644
--- a/package.c
+++ b/package.c
@@ -128,6 +128,14 @@ static void export_location(Exporter *ex, Location where) {
 		export_vlq(ex, (U64)where.start->pos.line);
 	}
 }
+static Location import_location(Importer *im) {
+	Location l;
+	l.start = NULL;
+	l.simple_location = imptr_malloc(im, sizeof *l.simple_location);
+	l.simple_location->ctx = &im->err_ctx;
+	l.simple_location->line = (U32)import_vlq(im);
+	return l;
+}
 
 static inline void export_ident(Exporter *ex, Identifier i) {
 	if (!i->export_id) {
diff --git a/types.h b/types.h
index 7ea2c25..605b6d2 100644
--- a/types.h
+++ b/types.h
@@ -322,8 +322,15 @@ typedef struct Token {
 
 
 typedef struct Location {
+	/* if start is NULL, simple_location will be used. */
 	Token *start;
-	Token *end; /* Exclusive */
+	union {
+		Token *end; /* Exclusive */
+	    struct {
+			ErrCtx *ctx;
+			U32 line;
+		} *simple_location;
+	};
 } Location;
 
 
-- 
cgit v1.2.3