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implemented variable parsing

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This commit is contained in:
Lorenzo Torres 2025-12-02 21:47:00 +01:00
parent 9302e4710d
commit d0d750f059
4 changed files with 36 additions and 5 deletions
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27
parser.c
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@ -448,7 +448,7 @@ ast_node *parse_expression(parser *p)
return node;
}
if ((p->tokens->type >= TOKEN_DOUBLE_EQ && p->tokens->type <= TOKEN_NOT_EQ) || (p->tokens->type >= TOKEN_LSHIFT_EQ && p->tokens->type <= TOKEN_DOUBLE_AND))
if (p->tokens && ((p->tokens->type >= TOKEN_DOUBLE_EQ && p->tokens->type <= TOKEN_NOT_EQ) || (p->tokens->type >= TOKEN_LSHIFT_EQ && p->tokens->type <= TOKEN_DOUBLE_AND)))
{
binary_op op;
switch (p->tokens->type)
@ -777,6 +777,31 @@ static ast_node *parse_statement(parser *p)
return parse_while(p);
}
}
else if (match_peek(p, TOKEN_IDENTIFIER) && p->tokens->next && p->tokens->next->type == TOKEN_IDENTIFIER)
{
/* Variable declaration. */
ast_node *node = arena_alloc(p->allocator, sizeof(ast_node));
node->type = NODE_VAR_DECL;
node->expr.var_decl.type = p->tokens->lexeme;
node->expr.var_decl.type_len = p->tokens->lexeme_len;
advance(p);
node->expr.var_decl.name = p->tokens->lexeme;
node->expr.var_decl.name_len = p->tokens->lexeme_len;
advance(p);
if (match(p, TOKEN_EQ)) {
node->expr.var_decl.value = parse_expression(p);
} else {
node->expr.var_decl.value = NULL;
}
if (!match(p, TOKEN_SEMICOLON))
{
error(p, "expected `;` after statement.");
return NULL;
}
return node;
}
else
{
ast_node *expr = parse_expression(p);