From 930ca8d3b760b33123ba877514a49eca5af35a6a Mon Sep 17 00:00:00 2001
From: c+1
Date: Tue, 21 Nov 2023 16:12:58 -0500
Subject: It is possible to parse strings.

---
 src/include/parser.h | 16 ++++++++--------
 src/main.c           |  2 +-
 src/parser.c         | 26 ++++++++++++++++++++++++--
 src/tree.c           |  6 ++++++
 4 files changed, 39 insertions(+), 11 deletions(-)

(limited to 'src')

diff --git a/src/include/parser.h b/src/include/parser.h
index 59bbbb5..a349992 100644
--- a/src/include/parser.h
+++ b/src/include/parser.h
@@ -37,19 +37,19 @@ int parser_match(parser_t* parser, token_type_t type);
 /* Steps the parser forward by one token, then check whether the new token matches the given type. */
 int parser_nxt_token_match(parser_t* parser, token_type_t type);
 
-/* 
-   Parse a single literal value.
-   - Only does integers for now.
-*/
-tree_t* parser_parse_lit(parser_t* parser);
+/* Return the tree for an integer. */
+tree_t* parser_parse_lint(parser_t* parser);
 
-/* Return a tree for a single semicolon-separated expression.*/
+/* Return the tree for a string.  */
+tree_t* parser_parse_lstr(parser_t* parser);
+
+/* Return the tree for an expression.*/
 tree_t* parser_parse_expr(parser_t* parser);
 
-/* Return a tree for a single curly-brace-separated expression. */
+/* Return the tree for an expression. */
 tree_t* parser_parse_block(parser_t* parser);
 
-
+/* Parse. */
 tree_t* parser_parse(parser_t* parser);
 
 /* Parse with the given parser. */
diff --git a/src/main.c b/src/main.c
index 710cbe0..11ab70a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -54,8 +54,8 @@ int main(int argc, char* argv[]) {
    /* Clean up parser stuff. */
    token_destroy(lexer->tokenl);
    tree_destroy(parser->tree);
-   parser_destroy(parser);
    lexer_destroy(lexer);
+   parser_destroy(parser);
    free(src);
 
    HLKT_LOG();
diff --git a/src/parser.c b/src/parser.c
index fb8a4aa..b086703 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -38,7 +38,7 @@ int parser_nxt_token_match(parser_t* parser, token_type_t type) {
    return parser_match(parser, type);
 }
 
-tree_t* parser_parse_lit(parser_t* parser) {
+tree_t* parser_parse_lint(parser_t* parser) {
    tree_t* lint;
 
    lint = tree_init(TREE_TYPE_LINT);
@@ -47,13 +47,35 @@ tree_t* parser_parse_lit(parser_t* parser) {
    return lint;
 }
 
+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);
+
+   return lstr;
+}
+
 tree_t* parser_parse_expr(parser_t* parser) {
    tree_t* expr;
 
    expr = tree_init(TREE_TYPE_EXPR);
 
    /* For now this is the only type of expression. */
-   expr->data.expr.val = parser_parse_lit(parser);
+
+   switch (parser->token->type) {
+      case TOKEN_INT:
+         expr->data.expr.val = parser_parse_lint(parser);
+         break;
+      case TOKEN_STR:
+         expr->data.expr.val = parser_parse_lstr(parser);
+         break;
+      default:
+         return expr;
+   }
 
    return expr;
 }
diff --git a/src/tree.c b/src/tree.c
index 83f36bc..8c32809 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -123,6 +123,12 @@ void tree_print(tree_t* tree, int nest) {
             log_raw("%s %d\n", spaces, tree->data.lint.val);
          break;
       case TREE_TYPE_LSTR:
+         NEST("[lstr]");
+         NEST("val:");
+            log_raw("%s %s\n", spaces, tree->data.lstr.val);
+         NEST("len:");
+            log_raw("%s %d\n", spaces, tree->data.lstr.len);
+         break;
       case TREE_TYPE_TAG:
       case TREE_TYPE_DARG:
       case TREE_TYPE_CARG:
-- 
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