scc

Simple C99 Compiler
Log | Files | Refs | README | LICENSE

commit 0806fd87e7bb0f60a0acc1600b84d1a74351f5d1
parent ea6318d7167e507432111818013945f99074978b
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Sat, 25 Aug 2012 14:05:13 +0200

Added tree struct for for statement

Diffstat:
flow.c | 15+++++++--------
syntax.h | 3++-
tree.c | 2++
3 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/flow.c b/flow.c @@ -41,19 +41,18 @@ do_do(void) static struct node * do_for(void) { + register struct node *exp1, *exp2, *exp3; + expect(FOR); expect('('); - if (yytoken != ';') - expr(); + exp1 = (yytoken != ';') ? expr() : NULL; expect(';'); - if (yytoken != ';') - expr(); + exp2 = (yytoken != ';') ? expr() : NULL; expect(';'); - if (yytoken != ')') - expr(); + exp3 = (yytoken != ')') ? expr() : NULL; expect(')'); - stmt(); - return NULL; + + return node2(OFOR, node3(OFEXP, exp1, exp2, exp3), stmt()); } static struct node * diff --git a/syntax.h b/syntax.h @@ -10,7 +10,8 @@ enum opcode { OSHR, OLT, OGT, OGE, OLE, OEQ, ONE, OBAND, OBXOR, OBOR, OAND, OOR, OTERN, OASSIGN, OA_MUL, OA_DIV, OA_MOD, OA_ADD, OA_SUB, OA_SHL, OA_SHR, OA_AND, - OA_XOR, OA_OR, OSYM, OCOMP, OSWITCH, OIF + OA_XOR, OA_OR, OSYM, OCOMP, OSWITCH, OIF, OFOR, + OFEXP }; struct node; diff --git a/tree.c b/tree.c @@ -179,6 +179,8 @@ prtree_helper(register struct node *np) [OCOMP] = {255, "comp"}, [OSWITCH] = {2, "switch"}, [OIF] = {3, "if"}, + [OFOR] = {2, "for"}, + [OFEXP] = {3, "efor"} }; if (!np) { fputs(" nil", stdout);