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authorBram Moolenaar <Bram@vim.org>2020-01-26 15:56:19 +0100
committerBram Moolenaar <Bram@vim.org>2020-01-26 15:56:19 +0100
commit8a7d6542b33e5d2b352262305c3bfdb2d14e1cf8 (patch)
tree8e5f241129a1c690ea81d697a72fb4c1704c0cb6 /src/vim9script.c
parent1d9215b9aaa120b9d78fee49488556f73007ce78 (diff)
downloadvim-git-8a7d6542b33e5d2b352262305c3bfdb2d14e1cf8.tar.gz
patch 8.2.0149: maintaining a Vim9 branch separately is more workv8.2.0149
Problem: Maintaining a Vim9 branch separately is more work. Solution: Merge the Vim9 script changes.
Diffstat (limited to 'src/vim9script.c')
-rw-r--r--src/vim9script.c405
1 files changed, 405 insertions, 0 deletions
diff --git a/src/vim9script.c b/src/vim9script.c
new file mode 100644
index 000000000..4596ce35a
--- /dev/null
+++ b/src/vim9script.c
@@ -0,0 +1,405 @@
+/* vi:set ts=8 sts=4 sw=4 noet:
+ *
+ * VIM - Vi IMproved by Bram Moolenaar
+ *
+ * Do ":help uganda" in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ * See README.txt for an overview of the Vim source code.
+ */
+
+/*
+ * vim9script.c: :vim9script, :import, :export and friends
+ */
+
+#include "vim.h"
+
+#if defined(FEAT_EVAL) || defined(PROTO)
+
+#include "vim9.h"
+
+static char e_needs_vim9[] = N_("E1042: import/export can only be used in vim9script");
+
+ int
+in_vim9script(void)
+{
+ // TODO: go up the stack?
+ return current_sctx.sc_version == SCRIPT_VERSION_VIM9;
+}
+
+/*
+ * ":vim9script".
+ */
+ void
+ex_vim9script(exarg_T *eap)
+{
+ scriptitem_T *si = &SCRIPT_ITEM(current_sctx.sc_sid);
+
+ if (!getline_equal(eap->getline, eap->cookie, getsourceline))
+ {
+ emsg(_("E1038: vim9script can only be used in a script"));
+ return;
+ }
+ if (si->sn_had_command)
+ {
+ emsg(_("E1039: vim9script must be the first command in a script"));
+ return;
+ }
+ current_sctx.sc_version = SCRIPT_VERSION_VIM9;
+ si->sn_version = SCRIPT_VERSION_VIM9;
+ si->sn_had_command = TRUE;
+
+ if (STRCMP(p_cpo, CPO_VIM) != 0)
+ {
+ si->sn_save_cpo = p_cpo;
+ p_cpo = vim_strsave((char_u *)CPO_VIM);
+ }
+}
+
+/*
+ * ":export let Name: type"
+ * ":export const Name: type"
+ * ":export def Name(..."
+ * ":export class Name ..."
+ *
+ * ":export {Name, ...}"
+ */
+ void
+ex_export(exarg_T *eap UNUSED)
+{
+ if (current_sctx.sc_version != SCRIPT_VERSION_VIM9)
+ {
+ emsg(_(e_needs_vim9));
+ return;
+ }
+
+ eap->cmd = eap->arg;
+ (void)find_ex_command(eap, NULL, lookup_scriptvar, NULL);
+ switch (eap->cmdidx)
+ {
+ case CMD_let:
+ case CMD_const:
+ case CMD_def:
+ // case CMD_class:
+ is_export = TRUE;
+ do_cmdline(eap->cmd, eap->getline, eap->cookie,
+ DOCMD_VERBOSE + DOCMD_NOWAIT);
+
+ // The command will reset "is_export" when exporting an item.
+ if (is_export)
+ {
+ emsg(_("E1044: export with invalid argument"));
+ is_export = FALSE;
+ }
+ break;
+ default:
+ emsg(_("E1043: Invalid command after :export"));
+ break;
+ }
+}
+
+/*
+ * Add a new imported item entry to the current script.
+ */
+ static imported_T *
+new_imported(garray_T *gap)
+{
+ if (ga_grow(gap, 1) == OK)
+ return ((imported_T *)gap->ga_data + gap->ga_len++);
+ return NULL;
+}
+
+/*
+ * Free all imported items in script "sid".
+ */
+ void
+free_imports(int sid)
+{
+ scriptitem_T *si = &SCRIPT_ITEM(sid);
+ int idx;
+
+ for (idx = 0; idx < si->sn_imports.ga_len; ++idx)
+ {
+ imported_T *imp = ((imported_T *)si->sn_imports.ga_data + idx);
+
+ vim_free(imp->imp_name);
+ }
+ ga_clear(&si->sn_imports);
+}
+
+/*
+ * ":import Item from 'filename'"
+ * ":import Item as Alias from 'filename'"
+ * ":import {Item} from 'filename'".
+ * ":import {Item as Alias} from 'filename'"
+ * ":import {Item, Item} from 'filename'"
+ * ":import {Item, Item as Alias} from 'filename'"
+ *
+ * ":import * as Name from 'filename'"
+ */
+ void
+ex_import(exarg_T *eap)
+{
+ if (current_sctx.sc_version != SCRIPT_VERSION_VIM9)
+ emsg(_(e_needs_vim9));
+ else
+ {
+ char_u *cmd_end = handle_import(eap->arg, NULL, current_sctx.sc_sid);
+
+ if (cmd_end != NULL)
+ eap->nextcmd = check_nextcmd(cmd_end);
+ }
+}
+
+/*
+ * Handle an ":import" command and add the resulting imported_T to "gap", when
+ * not NULL, or script "import_sid" sn_imports.
+ * Returns a pointer to after the command or NULL in case of failure
+ */
+ char_u *
+handle_import(char_u *arg_start, garray_T *gap, int import_sid)
+{
+ char_u *arg = arg_start;
+ char_u *cmd_end;
+ char_u *as_ptr = NULL;
+ char_u *from_ptr;
+ int as_len = 0;
+ int ret = FAIL;
+ typval_T tv;
+ int sid = -1;
+ int res;
+
+ if (*arg == '{')
+ {
+ // skip over {item} list
+ while (*arg != NUL && *arg != '}')
+ ++arg;
+ if (*arg == '}')
+ arg = skipwhite(arg + 1);
+ }
+ else
+ {
+ if (*arg == '*')
+ arg = skipwhite(arg + 1);
+ else
+ {
+ while (eval_isnamec1(*arg))
+ ++arg;
+ arg = skipwhite(arg);
+ }
+ if (STRNCMP("as", arg, 2) == 0 && VIM_ISWHITE(arg[2]))
+ {
+ // skip over "as Name "
+ arg = skipwhite(arg + 2);
+ as_ptr = arg;
+ while (eval_isnamec1(*arg))
+ ++arg;
+ as_len = (int)(arg - as_ptr);
+ arg = skipwhite(arg);
+ }
+ else if (*arg_start == '*')
+ {
+ emsg(_("E1045: Missing \"as\" after *"));
+ return NULL;
+ }
+ }
+ if (STRNCMP("from", arg, 4) != 0 || !VIM_ISWHITE(arg[4]))
+ {
+ emsg(_("E1045: Missing \"from\""));
+ return NULL;
+ }
+ from_ptr = arg;
+ arg = skipwhite(arg + 4);
+ tv.v_type = VAR_UNKNOWN;
+ // TODO: should we accept any expression?
+ if (*arg == '\'')
+ ret = get_lit_string_tv(&arg, &tv, TRUE);
+ else if (*arg == '"')
+ ret = get_string_tv(&arg, &tv, TRUE);
+ if (ret == FAIL || tv.vval.v_string == NULL || *tv.vval.v_string == NUL)
+ {
+ emsg(_("E1045: Invalid string after \"from\""));
+ return NULL;
+ }
+ cmd_end = arg;
+
+ // find script tv.vval.v_string
+ if (*tv.vval.v_string == '.')
+ {
+ size_t len;
+ scriptitem_T *si = &SCRIPT_ITEM(current_sctx.sc_sid);
+ char_u *tail = gettail(si->sn_name);
+ char_u *from_name;
+
+ // Relative to current script: "./name.vim", "../../name.vim".
+ len = STRLEN(si->sn_name) - STRLEN(tail) + STRLEN(tv.vval.v_string) + 2;
+ from_name = alloc((int)len);
+ if (from_name == NULL)
+ {
+ clear_tv(&tv);
+ return NULL;
+ }
+ vim_strncpy(from_name, si->sn_name, tail - si->sn_name);
+ add_pathsep(from_name);
+ STRCAT(from_name, tv.vval.v_string);
+ simplify_filename(from_name);
+
+ res = do_source(from_name, FALSE, DOSO_NONE, &sid);
+ vim_free(from_name);
+ }
+ else if (mch_isFullName(tv.vval.v_string))
+ {
+ // Absolute path: "/tmp/name.vim"
+ res = do_source(tv.vval.v_string, FALSE, DOSO_NONE, &sid);
+ }
+ else
+ {
+ size_t len = 7 + STRLEN(tv.vval.v_string) + 1;
+ char_u *from_name;
+
+ // Find file in "import" subdirs in 'runtimepath'.
+ from_name = alloc((int)len);
+ if (from_name == NULL)
+ {
+ clear_tv(&tv);
+ return NULL;
+ }
+ vim_snprintf((char *)from_name, len, "import/%s", tv.vval.v_string);
+ res = source_in_path(p_rtp, from_name, DIP_NOAFTER, &sid);
+ vim_free(from_name);
+ }
+
+ if (res == FAIL || sid <= 0)
+ {
+ semsg(_("E1053: Could not import \"%s\""), tv.vval.v_string);
+ clear_tv(&tv);
+ return NULL;
+ }
+ clear_tv(&tv);
+
+ if (*arg_start == '*')
+ {
+ imported_T *imported = new_imported(gap != NULL ? gap
+ : &SCRIPT_ITEM(import_sid).sn_imports);
+
+ if (imported == NULL)
+ return NULL;
+ imported->imp_name = vim_strnsave(as_ptr, as_len);
+ imported->imp_sid = sid;
+ imported->imp_all = TRUE;
+ }
+ else
+ {
+ scriptitem_T *script = &SCRIPT_ITEM(sid);
+
+ arg = arg_start;
+ if (*arg == '{')
+ arg = skipwhite(arg + 1);
+ for (;;)
+ {
+ char_u *name = arg;
+ int name_len;
+ int cc;
+ int idx;
+ svar_T *sv;
+ imported_T *imported;
+ ufunc_T *ufunc;
+
+ // isolate one name
+ while (eval_isnamec1(*arg))
+ ++arg;
+ name_len = (int)(arg - name);
+
+ // find name in "script"
+ // TODO: also find script-local user function
+ cc = *arg;
+ *arg = NUL;
+ idx = get_script_item_idx(sid, name, FALSE);
+ if (idx >= 0)
+ {
+ sv = ((svar_T *)script->sn_var_vals.ga_data) + idx;
+ if (!sv->sv_export)
+ {
+ semsg(_("E1049: Item not exported in script: %s"), name);
+ *arg = cc;
+ return NULL;
+ }
+ }
+ else
+ {
+ char_u buffer[200];
+ char_u *funcname;
+
+ // it could be a user function.
+ if (STRLEN(name) < sizeof(buffer) - 10)
+ funcname = buffer;
+ else
+ {
+ funcname = alloc(STRLEN(name) + 10);
+ if (funcname == NULL)
+ {
+ *arg = cc;
+ return NULL;
+ }
+ }
+ funcname[0] = K_SPECIAL;
+ funcname[1] = KS_EXTRA;
+ funcname[2] = (int)KE_SNR;
+ sprintf((char *)funcname + 3, "%ld_%s", (long)sid, name);
+ ufunc = find_func(funcname, NULL);
+ if (funcname != buffer)
+ vim_free(funcname);
+
+ if (ufunc == NULL)
+ {
+ semsg(_("E1048: Item not found in script: %s"), name);
+ *arg = cc;
+ return NULL;
+ }
+ }
+
+ imported = new_imported(gap != NULL ? gap
+ : &SCRIPT_ITEM(import_sid).sn_imports);
+ if (imported == NULL)
+ return NULL;
+
+ *arg = cc;
+ arg = skipwhite(arg);
+
+ // TODO: check for "as" following
+ // imported->imp_name = vim_strnsave(as_ptr, as_len);
+ imported->imp_name = vim_strnsave(name, name_len);
+ imported->imp_sid = sid;
+ if (idx >= 0)
+ {
+ imported->imp_type = sv->sv_type;
+ imported->imp_var_vals_idx = idx;
+ }
+ else
+ imported->imp_funcname = ufunc->uf_name;
+
+ arg = skipwhite(arg);
+ if (*arg_start != '{')
+ break;
+ if (*arg == '}')
+ {
+ arg = skipwhite(arg + 1);
+ break;
+ }
+
+ if (*arg != ',')
+ {
+ emsg(_("E1046: Missing comma in import"));
+ return NULL;
+ }
+ arg = skipwhite(arg + 1);
+ }
+ if (arg != from_ptr)
+ {
+ emsg(_("E1047: syntax error in import"));
+ return NULL;
+ }
+ }
+ return cmd_end;
+}
+
+#endif // FEAT_EVAL