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authorc2023-11-25 10:37:37 -0500
committerc2023-11-25 10:37:37 -0500
commitbf3767fa7f0f1687d930d0d137e76a0206545fd6 (patch)
tree30bc03851ecfa3618c19b4de4a895fc7fc284abd
parent930ca8d3b760b33123ba877514a49eca5af35a6a (diff)
Functions with single arguments are possible.
-rw-r--r--Makefile4
-rw-r--r--src/include/parser.h6
-rw-r--r--src/include/tree.h6
-rw-r--r--src/parser.c37
-rw-r--r--src/tree.c28
5 files changed, 63 insertions, 18 deletions
diff --git a/Makefile b/Makefile
index c5f9963..0a68937 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,8 @@
BIN := halk
PREFIX := /usr/local/bin
CC := gcc
-REG_CFLAGS := -std=c99 -O3 -s
-DBG_CFLAGS := -std=c99 -Og -ggdb -pedantic
+REG_CFLAGS := -ansi -O3 -s
+DBG_CFLAGS := -ansi -Og -ggdb -pedantic
DBG_CFLAGS += -Wall -Wno-deprecated-declarations
DBG_CFLAGS += -fsanitize=leak,address,undefined -fno-omit-frame-pointer
CFLAGS := ${REG_CFLAGS}
diff --git a/src/include/parser.h b/src/include/parser.h
index a349992..acf6438 100644
--- a/src/include/parser.h
+++ b/src/include/parser.h
@@ -49,6 +49,12 @@ tree_t* parser_parse_expr(parser_t* parser);
/* Return the tree for an expression. */
tree_t* parser_parse_block(parser_t* parser);
+/* Return the tree for a call's arguments. */
+tree_t* parser_parse_carg(parser_t* parser);
+
+/* Return the tree for a call. */
+tree_t* parser_parse_call(parser_t* parser);
+
/* Parse. */
tree_t* parser_parse(parser_t* parser);
diff --git a/src/include/tree.h b/src/include/tree.h
index 3d3bcbd..8954ef8 100644
--- a/src/include/tree.h
+++ b/src/include/tree.h
@@ -12,7 +12,7 @@ typedef enum TREE_TYPE {
TREE_TYPE_DARG,
TREE_TYPE_CARG,
TREE_TYPE_DEF,
- TREE_TYPE_CAL,
+ TREE_TYPE_CALL,
} tree_type_t;
/* The Abstract Syntax Tree (AST) structure. */
@@ -74,10 +74,10 @@ typedef struct TREE {
} def;
/* Calls. */
- struct TREE_DATA_CAL {
+ struct TREE_DATA_CALL {
char* target;
struct TREE* arg; /* CARG */
- } cal;
+ } call;
} data;
} tree_t;
diff --git a/src/parser.c b/src/parser.c
index b086703..c378d75 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -1,5 +1,6 @@
#include "include/parser.h"
#include "include/token.h"
+#include "include/tree.h"
parser_t* parser_init(token_t* token) {
parser_t* parser;
@@ -51,10 +52,11 @@ tree_t* parser_parse_lstr(parser_t* parser) {
tree_t* lstr;
lstr = tree_init(TREE_TYPE_LSTR);
+
lstr->data.lstr.len = strlen(parser->token->val);
- lstr->data.lstr.val = ecalloc(lstr->data.lstr.len + 1, sizeof(char));
- lstr->data.lstr.val[lstr->data.lstr.len] = '\0';
- strcpy(lstr->data.lstr.val, parser->token->val);
+ /* Swap pointers to allow for future token destruction. */
+ lstr->data.lstr.val = parser->token->val;
+ parser->token->val = NULL;
return lstr;
}
@@ -64,8 +66,6 @@ tree_t* parser_parse_expr(parser_t* parser) {
expr = tree_init(TREE_TYPE_EXPR);
- /* For now this is the only type of expression. */
-
switch (parser->token->type) {
case TOKEN_INT:
expr->data.expr.val = parser_parse_lint(parser);
@@ -73,6 +73,9 @@ tree_t* parser_parse_expr(parser_t* parser) {
case TOKEN_STR:
expr->data.expr.val = parser_parse_lstr(parser);
break;
+ case TOKEN_KWD:
+ expr->data.expr.val = parser_parse_call(parser);
+ break;
default:
return expr;
}
@@ -116,6 +119,30 @@ tree_t* parser_parse_block(parser_t* parser) {
return block;
}
+tree_t* parser_parse_carg(parser_t* parser) {
+ tree_t* carg;
+
+ carg = tree_init(TREE_TYPE_CARG);
+
+ carg->data.carg.val = parser_parse_expr(parser);
+ carg->data.carg.nxt = NULL;
+
+ return carg;
+}
+
+tree_t* parser_parse_call(parser_t* parser) {
+ tree_t* call;
+
+ call = tree_init(TREE_TYPE_CALL);
+
+ call->data.call.target = parser->token->val;
+ parser->token->val = NULL;
+ parser_nxt_token_match(parser, TOKEN_APPLY) || (call->data.call.arg = NULL);
+ call->data.call.arg = (parser_nxt_token(parser) ? parser_parse_carg(parser) : NULL);
+
+ return call;
+}
+
tree_t* parser_parse(parser_t* parser) {
return parser_parse_block(parser);
}
diff --git a/src/tree.c b/src/tree.c
index 8c32809..4720ae6 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -38,9 +38,9 @@ tree_t* tree_init(int type) {
tree->data.def.arg = NULL;
tree->data.def.val = NULL;
break;
- case TREE_TYPE_CAL:
- tree->data.cal.target = NULL;
- tree->data.cal.arg = NULL;
+ case TREE_TYPE_CALL:
+ tree->data.call.target = NULL;
+ tree->data.call.arg = NULL;
break;
}
@@ -80,9 +80,9 @@ void tree_destroy(tree_t* tree) {
free(tree->data.def.arg);
tree_destroy(tree->data.def.val);
break;
- case TREE_TYPE_CAL:
- free(tree->data.cal.target);
- tree_destroy(tree->data.cal.arg);
+ case TREE_TYPE_CALL:
+ free(tree->data.call.target);
+ tree_destroy(tree->data.call.arg);
break;
}
@@ -129,11 +129,23 @@ void tree_print(tree_t* tree, int nest) {
NEST("len:");
log_raw("%s %d\n", spaces, tree->data.lstr.len);
break;
+ case TREE_TYPE_CALL:
+ NEST("[call]");
+ NEST("target:");
+ log_raw("%s %s\n", spaces, tree->data.call.target);
+ NEST("arg:")
+ tree_print(tree->data.call.arg, nest + 1);
+ break;
+ case TREE_TYPE_CARG:
+ NEST("[carg]");
+ NEST("val:");
+ tree_print(tree->data.carg.val, nest + 1);
+ NEST("nxt:");
+ tree_print(tree->data.carg.nxt, nest + 1);
+ break;
case TREE_TYPE_TAG:
case TREE_TYPE_DARG:
- case TREE_TYPE_CARG:
case TREE_TYPE_DEF:
- case TREE_TYPE_CAL:
NEST("???");
break;
}