scc

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

commit 7ce5769695cbcd21227a937a5f60d80a1a464d1b
parent f761999f59431d41339a2d8978faa43f53aa930e
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Thu, 15 May 2014 12:04:00 +0200

Forbid declaration of incomplete type variables

Diffstat:
cc1/decl.c | 2++
cc1/types.c | 16+++++++++-------
2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/cc1/decl.c b/cc1/decl.c @@ -156,6 +156,8 @@ declarator(Type *tp, int8_t flags) break; } } + if (!tp->defined) + error("declared variable '%s' of incomplete type", sym->name); if (!sym) sym = &dummy; sym->type = tp; diff --git a/cc1/types.c b/cc1/types.c @@ -144,7 +144,7 @@ Type * mktype(Type *tp, uint8_t op, uint16_t nelem) { static Type *typetab[NR_TYPE_HASH], **tbl; - static uint8_t t; + static uint8_t t, def; register Type *bp; char letter; @@ -163,18 +163,20 @@ mktype(Type *tp, uint8_t op, uint16_t nelem) } switch (op) { - case PTR: letter = L_POINTER; break; - case FTN: letter = L_FUNCTION; break; - case ARY: letter = L_ARRAY; break; - case ENUM: letter = L_INT; break; - case STRUCT: letter = L_STRUCT; break; - default: letter = tp->letter; + case PTR: letter = L_POINTER, def = 1; break; + case FTN: letter = L_FUNCTION, def = 1; break; + case ARY: letter = L_ARRAY, def = nelem != 0; break; + case ENUM: letter = L_INT, def = 0; break; + case STRUCT: letter = L_STRUCT, def = 0; break; + /* TODO case UNION: */ + default: letter = tp->letter; /* is it possible? */ } bp = xcalloc(1, sizeof(*bp)); bp->next = *tbl; bp->type = tp; bp->op = op; bp->letter = letter; + bp->defined = def; return *tbl = bp; }