Allow qstr's with non-ident chars, construct good identifier for them.

Also, add qstr's for string appearing in unix REPL loop, gross effect
being less allocations for each command run.

py/makeqstrdata.py

 import argparse
 import re
+from htmlentitydefs import codepoint2name
 
 # this must match the equivalent function in qstr.c
 def compute_hash(qstr):
@@ -10,7 +11,7 @@ def compute_hash(qstr):
 
 def do_work(infiles):
     # read the qstrs in from the input files
-    qstrs = []
+    qstrs = {}
     for infile in infiles:
         with open(infile, 'rt') as f:
             line_number = 0
@@ -23,28 +24,29 @@ def do_work(infiles):
                     continue
 
                 # verify line is of the correct form
-                match = re.match(r'Q\(([0-9A-Za-z_]+)\)$', line)
+                match = re.match(r'Q\((.+)\)$', line)
                 if not match:
                     print('({}:{}) bad qstr format, got {}'.format(infile, line_number, line))
                     return False
 
                 # get the qstr value
                 qstr = match.group(1)
+                ident = re.sub(r'[^A-Za-z0-9_]', lambda s: "_" + codepoint2name[ord(s.group(0))] + "_", qstr)
 
                 # don't add duplicates
-                if qstr in qstrs:
+                if ident in qstrs:
                     continue
 
                 # add the qstr to the list
-                qstrs.append(qstr)
+                qstrs[ident] = qstr
 
     # process the qstrs, printing out the generated C header file
     print('// This file was automatically generated by makeqstrdata.py')
     print('')
-    for qstr in qstrs:
+    for ident, qstr in qstrs.items():
         qhash = compute_hash(qstr)
         qlen = len(qstr)
-        print('Q({}, (const byte*)"\\x{:02x}\\x{:02x}\\x{:02x}\\x{:02x}" "{}")'.format(qstr, qhash & 0xff, (qhash >> 8) & 0xff, qlen & 0xff, (qlen >> 8) & 0xff, qstr))
+        print('Q({}, (const byte*)"\\x{:02x}\\x{:02x}\\x{:02x}\\x{:02x}" "{}")'.format(ident, qhash & 0xff, (qhash >> 8) & 0xff, qlen & 0xff, (qlen >> 8) & 0xff, qstr))
 
     return True
 

py/qstrdefs.h

@@ -80,3 +80,11 @@ Q(sort)
 Q(join)
 Q(strip)
 Q(format)
+
+Q(<module>)
+Q(<lambda>)
+Q(<listcomp>)
+Q(<dictcomp>)
+Q(<setcomp>)
+Q(<genexpr>)
+Q(<stdin>)

py/scope.c

@@ -18,7 +18,7 @@ scope_t *scope_new(scope_kind_t kind, mp_parse_node_t pn, qstr source_file, uint
     scope->source_file = source_file;
     switch (kind) {
         case SCOPE_MODULE:
-            scope->simple_name = QSTR_FROM_STR_STATIC("<module>");
+            scope->simple_name = MP_QSTR__lt_module_gt_;
             break;
         case SCOPE_FUNCTION:
         case SCOPE_CLASS:
@@ -26,19 +26,19 @@ scope_t *scope_new(scope_kind_t kind, mp_parse_node_t pn, qstr source_file, uint
             scope->simple_name = MP_PARSE_NODE_LEAF_ARG(((mp_parse_node_struct_t*)pn)->nodes[0]);
             break;
         case SCOPE_LAMBDA:
-            scope->simple_name = QSTR_FROM_STR_STATIC("<lambda>");
+            scope->simple_name = MP_QSTR__lt_lambda_gt_;
             break;
         case SCOPE_LIST_COMP:
-            scope->simple_name = QSTR_FROM_STR_STATIC("<listcomp>");
+            scope->simple_name = MP_QSTR__lt_listcomp_gt_;
             break;
         case SCOPE_DICT_COMP:
-            scope->simple_name = QSTR_FROM_STR_STATIC("<dictcomp>");
+            scope->simple_name = MP_QSTR__lt_dictcomp_gt_;
             break;
         case SCOPE_SET_COMP:
-            scope->simple_name = QSTR_FROM_STR_STATIC("<setcomp>");
+            scope->simple_name = MP_QSTR__lt_setcomp_gt_;
             break;
         case SCOPE_GEN_EXPR:
-            scope->simple_name = QSTR_FROM_STR_STATIC("<genexpr>");
+            scope->simple_name = MP_QSTR__lt_genexpr_gt_;
             break;
         default:
             assert(0);