diff options
author | Bram Moolenaar <Bram@vim.org> | 2020-10-04 16:06:05 +0200 |
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committer | Bram Moolenaar <Bram@vim.org> | 2020-10-04 16:06:05 +0200 |
commit | 1310660557470a669cc64b359e20666b116e5dbd (patch) | |
tree | 9769c7afcb813f6a1cee333375be0ebddad9f91d /src/vim9compile.c | |
parent | 6abd3dc257cf56a8262db38eb15c7cc754e8e002 (diff) | |
download | vim-git-1310660557470a669cc64b359e20666b116e5dbd.tar.gz |
patch 8.2.1798: Vim9: trinary operator condition is too permissivev8.2.1798
Problem: Vim9: trinary operator condition is too permissive.
Solution: Use tv_get_bool_chk().
Diffstat (limited to 'src/vim9compile.c')
-rw-r--r-- | src/vim9compile.c | 52 |
1 files changed, 49 insertions, 3 deletions
diff --git a/src/vim9compile.c b/src/vim9compile.c index f7dc9df20..8d362ab1d 100644 --- a/src/vim9compile.c +++ b/src/vim9compile.c @@ -4212,7 +4212,17 @@ compile_expr1(char_u **arg, cctx_T *cctx, ppconst_T *ppconst) // the condition is a constant, we know whether the ? or the : // expression is to be evaluated. has_const_expr = TRUE; - const_value = tv2bool(&ppconst->pp_tv[ppconst_used]); + if (op_falsy) + const_value = tv2bool(&ppconst->pp_tv[ppconst_used]); + else + { + int error = FALSE; + + const_value = tv_get_bool_chk(&ppconst->pp_tv[ppconst_used], + &error); + if (error) + return FAIL; + } cctx->ctx_skip = save_skip == SKIP_YES || (op_falsy ? const_value : !const_value) ? SKIP_YES : SKIP_NOT; @@ -5638,6 +5648,23 @@ drop_scope(cctx_T *cctx) } /* + * Check that the top of the type stack has a type that can be used as a + * condition. Give an error and return FAIL if not. + */ + static int +bool_on_stack(cctx_T *cctx) +{ + garray_T *stack = &cctx->ctx_type_stack; + type_T *type; + + type = ((type_T **)stack->ga_data)[stack->ga_len - 1]; + if (type != &t_bool && type != &t_number && type != &t_any + && need_type(type, &t_bool, -1, cctx, FALSE) == FAIL) + return FAIL; + return OK; +} + +/* * compile "if expr" * * "if expr" Produces instructions: @@ -5689,8 +5716,14 @@ compile_if(char_u *arg, cctx_T *cctx) clear_ppconst(&ppconst); else if (instr->ga_len == instr_count && ppconst.pp_used == 1) { + int error = FALSE; + int v; + // The expression results in a constant. - cctx->ctx_skip = tv2bool(&ppconst.pp_tv[0]) ? SKIP_NOT : SKIP_YES; + v = tv_get_bool_chk(&ppconst.pp_tv[0], &error); + if (error) + return NULL; + cctx->ctx_skip = v ? SKIP_NOT : SKIP_YES; clear_ppconst(&ppconst); } else @@ -5699,6 +5732,8 @@ compile_if(char_u *arg, cctx_T *cctx) cctx->ctx_skip = SKIP_UNKNOWN; if (generate_ppconst(cctx, &ppconst) == FAIL) return NULL; + if (bool_on_stack(cctx) == FAIL) + return NULL; } scope = new_scope(cctx, IF_SCOPE); @@ -5764,9 +5799,15 @@ compile_elseif(char_u *arg, cctx_T *cctx) clear_ppconst(&ppconst); else if (instr->ga_len == instr_count && ppconst.pp_used == 1) { + int error = FALSE; + int v; + // The expression results in a constant. // TODO: how about nesting? - cctx->ctx_skip = tv2bool(&ppconst.pp_tv[0]) ? SKIP_NOT : SKIP_YES; + v = tv_get_bool_chk(&ppconst.pp_tv[0], &error); + if (error) + return NULL; + cctx->ctx_skip = v ? SKIP_NOT : SKIP_YES; clear_ppconst(&ppconst); scope->se_u.se_if.is_if_label = -1; } @@ -5776,6 +5817,8 @@ compile_elseif(char_u *arg, cctx_T *cctx) cctx->ctx_skip = SKIP_UNKNOWN; if (generate_ppconst(cctx, &ppconst) == FAIL) return NULL; + if (bool_on_stack(cctx) == FAIL) + return NULL; // "where" is set when ":elseif", "else" or ":endif" is found scope->se_u.se_if.is_if_label = instr->ga_len; @@ -6037,6 +6080,9 @@ compile_while(char_u *arg, cctx_T *cctx) if (compile_expr0(&p, cctx) == FAIL) return NULL; + if (bool_on_stack(cctx) == FAIL) + return FAIL; + // "while_end" is set when ":endwhile" is found if (compile_jump_to_end(&scope->se_u.se_while.ws_end_label, JUMP_IF_FALSE, cctx) == FAIL) |