[eggex] Allow Int or Str arg for Match accessors

Still need to calculate the index from the Str.

builtin/func_eggex.py

@@ -5,14 +5,14 @@
 from __future__ import print_function
 
 from _devbuild.gen.syntax_asdl import loc_t
-from _devbuild.gen.value_asdl import value, value_t
+from _devbuild.gen.value_asdl import value, value_e, value_t
 from core import error
 from core import state
 from core import vm
 from frontend import typed_args
-from mycpp.mylib import log
+from mycpp.mylib import log, tagswitch
 
-from typing import List
+from typing import List, cast
 
 _ = log
 
@@ -64,8 +64,19 @@ def __init__(self, mem, to_return):
     def Call(self, rd):
         # type: (typed_args.Reader) -> value_t
 
-        # TODO: Support strings for named captures
-        i = rd.OptionalInt(default_=0)
+        group = rd.PosValue()
+        UP_group = group
+        with tagswitch(group) as case:
+            if case(value_e.Int):
+                group = cast(value.Int, UP_group)
+                i = group.i
+            elif case(value_e.Str):
+                group = cast(value.Str, UP_group)
+                # TODO: calculate from mem registers
+                i = 0
+            else:
+                raise error.TypeErr(group, 'Expected Int or Str',
+                                    rd.LeftParenToken())
 
         s, indices = self.mem.GetRegexIndices()
 
@@ -88,9 +99,20 @@ def Call(self, rd):
 
         # This is guaranteed
         m = rd.PosMatch()
-        # TODO: Support strings for named captures
-        i = rd.OptionalInt(default_=0)
-        #val = rd.PosValue()
+
+        group = rd.PosValue()
+        UP_group = group
+        with tagswitch(group) as case:
+            if case(value_e.Int):
+                group = cast(value.Int, UP_group)
+                i = group.i
+            elif case(value_e.Str):
+                group = cast(value.Str, UP_group)
+                # TODO: calculate from mem registers
+                i = 0
+            else:
+                raise error.TypeErr(group, 'Expected Int or Str',
+                                    rd.LeftParenToken())
 
         rd.Done()
 

spec/ysh-regex-api.test.sh

@@ -101,15 +101,12 @@ if (x ~ /<capture d+> '-' <capture d+>/) {
   argv.py "${BASH_REMATCH[@]}"
   argv.py $[_group(0)] $[_group(1)] $[_group(2)]
 
-  argv.py $[_group()]  # synonym for _group(0)
-
   # TODO: Also test _start() and _end()
 }
 ## STDOUT:
 ['2020-08', '2020', '08']
 ['2020-08', '2020', '08']
 ['2020-08', '2020', '08']
-['2020-08']
 ## END
 
 #### _group() returns null when group doesn't match
@@ -128,7 +125,7 @@ shopt -s ysh:upgrade
 
 var s = 'foo123bar'
 if (s ~ /digit+/) {
-  echo start=$[_start()] end=$[_end()]
+  echo start=$[_start(0)] end=$[_end(0)]
 }
 echo ---
 
@@ -271,7 +268,7 @@ shopt -s ysh:all
 var x = 'zz 2020-08-20'
 
 if (x ~ /<capture d+ as year> '-' <capture d+ as month>/) {
-  argv.py $[_group('year')] $[_grou_group('month')]
+  argv.py $[_group('year')] $[_group('month')]
 }
 ## STDOUT:
 ['2020', '08']

ysh/regex_translate.py

@@ -13,7 +13,6 @@
     re_e,
     re_repeat,
     re_repeat_e,
-    NameType,
     EggexFlag,
 )
 from _devbuild.gen.id_kind_asdl import Id