[compiler] Parse and print procedure declarations

Signed-off-by: Quinn Stephens <quinn@osmora.org>

3 files changed, 59 insertions, 0 deletions

diff --git a/include/lexer/token.h b/include/lexer/token.h
index e0a9ea3..2ba5408 100644
--- a/include/lexer/token.h
+++ b/include/lexer/token.h
@@ -21,6 +21,7 @@ typedef enum {
     TK_CHARACTER,
 
     /* Keywords */
+    TK_PROC,
     TK_TYPE,
     TK_ENUM,
     TK_STRUCT,
diff --git a/include/parser/proc.h b/include/parser/proc.h
new file mode 100644
index 0000000..0cc8471
--- /dev/null
+++ b/include/parser/proc.h
@@ -0,0 +1,34 @@
+/*
+ * Procedure parser.
+ * Copyright (c) 2023-2024, Quinn Stephens and the OSMORA team.
+ * Provided under the BSD 3-Clause license.
+ */
+
+#ifndef _PARSER_PROC_H
+#define _PARSER_PROC_H
+
+#include "list.h"
+#include "hashmap.h"
+#include "parser/var.h"
+
+struct parameter {
+    struct variable var;
+    struct list_entry list_entry;
+};
+
+struct procedure {
+    struct hashmap_entry hashmap_entry;
+
+    char *name;
+    size_t name_len;
+
+    struct hashmap vars;
+    struct list params;
+
+    struct type *ret_typ;
+    int ret_n_ptrs;
+};
+
+void parse_proc(struct parser *ctx);
+
+#endif /* !_PARSER_PROC_H */
diff --git a/include/parser/var.h b/include/parser/var.h
new file mode 100644
index 0000000..dd981f5
--- /dev/null
+++ b/include/parser/var.h
@@ -0,0 +1,24 @@
+/*
+ * Variable definitions.
+ * Copyright (c) 2023-2024, Quinn Stephens and the OSMORA team.
+ * Provided under the BSD 3-Clause license.
+ */
+
+#ifndef _PARSER_VAR_H
+#define _PARSER_VAR_H
+
+#include <stddef.h>
+#include "hashmap.h"
+#include "parser/type.h"
+
+struct variable {
+    struct hashmap_entry hashmap_entry;
+
+    char *name;
+    size_t name_len;
+
+    struct type *typ;
+    int n_ptrs;
+};
+
+#endif /* !_PARSER_VAR_H */