From: Matthias Kruk <m@m10k.eu>
Date: Sun, 5 Jul 2020 07:28:46 +0000 (+0900)
Subject: parser: Implement parsing of assignment expressions
X-Git-Url: https://git.corax.cc/?a=commitdiff_plain;h=bf82b37e1799f7fee0e2002edb447ecc7afb8191;p=ccc

parser: Implement parsing of assignment expressions
---

diff --git a/src/parser.c b/src/parser.c
index 8211cbc..28e82af 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -591,6 +591,10 @@ struct primary_expression *parse_primary_expression(void)
 			 * position and free the struct, since we can't match a primary expression.
 			 */
 
+			if(pe->data.expr.expr) {
+				free(pe->data.expr.expr);
+			}
+
 			lex_setpos(pos);
 			free(pe);
 			pe = NULL;
@@ -599,3 +603,64 @@ struct primary_expression *parse_primary_expression(void)
 
 	return(pe);
 }
+
+struct assignment_expression *parse_assignment_expression(void)
+{
+	struct assignment_expression *ae;
+
+	ae = assignment_expression_new();
+
+	if(!ae) {
+		return(NULL);
+	}
+
+	if((ae->data.cexpr = parse_conditional_expression())) {
+		ae->type = ASSIGNMENT_EXPR_CONDITIONAL;
+	} else {
+		int pos;
+
+		pos = lex_getpos();
+
+		ae->data.aexpr.uexpr = parse_unary_expression();
+		ae->data.aexpr.op = lex_gettoken();
+		ae->data.aexpr.aexpr = parse_assignment_expression();
+
+		if(ae->data.aexpr.uexpr && ae->data.aexpr.op && ae->data.aexpr.aexpr &&
+		   (ae->data.aexpr.op->type == TOKEN_ASSIGN ||
+		    ae->data.aexpr.op->type == TOKEN_ASSIGN_ADD ||
+		    ae->data.aexpr.op->type == TOKEN_ASSIGN_AND ||
+		    ae->data.aexpr.op->type == TOKEN_ASSIGN_MOD ||
+		    ae->data.aexpr.op->type == TOKEN_ASSIGN_MUL ||
+		    ae->data.aexpr.op->type == TOKEN_ASSIGN_OR ||
+		    ae->data.aexpr.op->type == TOKEN_ASSIGN_SHL ||
+		    ae->data.aexpr.op->type == TOKEN_ASSIGN_SHR ||
+		    ae->data.aexpr.op->type == TOKEN_ASSIGN_SUB ||
+		    ae->data.aexpr.op->type == TOKEN_ASSIGN_XOR)) {
+			ae->type = ASSIGNMENT_EXPR_ASSIGNMENT;
+		} else {
+			if(ae->data.aexpr.uexpr) {
+				free(ae->data.aexpr.uexpr);
+			}
+
+			if(ae->data.aexpr.aexpr) {
+				free(ae->data.aexpr.aexpr);
+			}
+
+			lex_setpos(pos);
+			free(ae);
+			ae = NULL;
+		}
+	}
+
+	return(ae);
+}
+
+struct unary_expression *parse_unary_expression(void)
+{
+	return(NULL);
+}
+
+struct conditional_expression *parse_conditional_expression(void)
+{
+	return(NULL);
+}