allow enabling Prism via flag or env var

Enable Prism using either --prism

    ruby --prism test.rb

or via env var

    RUBY_PRISM=1 ruby test.rb

common.mk

@@ -2199,6 +2199,27 @@ ast.$(OBJEXT): $(top_srcdir)/internal/symbol.h
 ast.$(OBJEXT): $(top_srcdir)/internal/variable.h
 ast.$(OBJEXT): $(top_srcdir)/internal/vm.h
 ast.$(OBJEXT): $(top_srcdir)/internal/warnings.h
+ast.$(OBJEXT): $(top_srcdir)/prism/defines.h
+ast.$(OBJEXT): $(top_srcdir)/prism/diagnostic.h
+ast.$(OBJEXT): $(top_srcdir)/prism/encoding.h
+ast.$(OBJEXT): $(top_srcdir)/prism/node.h
+ast.$(OBJEXT): $(top_srcdir)/prism/options.h
+ast.$(OBJEXT): $(top_srcdir)/prism/pack.h
+ast.$(OBJEXT): $(top_srcdir)/prism/parser.h
+ast.$(OBJEXT): $(top_srcdir)/prism/prettyprint.h
+ast.$(OBJEXT): $(top_srcdir)/prism/prism.h
+ast.$(OBJEXT): $(top_srcdir)/prism/regexp.h
+ast.$(OBJEXT): $(top_srcdir)/prism/util/pm_buffer.h
+ast.$(OBJEXT): $(top_srcdir)/prism/util/pm_char.h
+ast.$(OBJEXT): $(top_srcdir)/prism/util/pm_constant_pool.h
+ast.$(OBJEXT): $(top_srcdir)/prism/util/pm_list.h
+ast.$(OBJEXT): $(top_srcdir)/prism/util/pm_memchr.h
+ast.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
+ast.$(OBJEXT): $(top_srcdir)/prism/util/pm_state_stack.h
+ast.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
+ast.$(OBJEXT): $(top_srcdir)/prism/util/pm_string_list.h
+ast.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
+ast.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
 ast.$(OBJEXT): {$(VPATH)}assert.h
 ast.$(OBJEXT): {$(VPATH)}ast.c
 ast.$(OBJEXT): {$(VPATH)}ast.rbinc
@@ -2375,6 +2396,8 @@ ast.$(OBJEXT): {$(VPATH)}missing.h
 ast.$(OBJEXT): {$(VPATH)}node.h
 ast.$(OBJEXT): {$(VPATH)}onigmo.h
 ast.$(OBJEXT): {$(VPATH)}oniguruma.h
+ast.$(OBJEXT): {$(VPATH)}prism/ast.h
+ast.$(OBJEXT): {$(VPATH)}prism/version.h
 ast.$(OBJEXT): {$(VPATH)}ruby_assert.h
 ast.$(OBJEXT): {$(VPATH)}ruby_atomic.h
 ast.$(OBJEXT): {$(VPATH)}rubyparser.h
@@ -2609,6 +2632,27 @@ builtin.$(OBJEXT): $(top_srcdir)/internal/static_assert.h
 builtin.$(OBJEXT): $(top_srcdir)/internal/variable.h
 builtin.$(OBJEXT): $(top_srcdir)/internal/vm.h
 builtin.$(OBJEXT): $(top_srcdir)/internal/warnings.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/defines.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/diagnostic.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/encoding.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/node.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/options.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/pack.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/parser.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/prettyprint.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/prism.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/regexp.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/util/pm_buffer.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/util/pm_char.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/util/pm_constant_pool.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/util/pm_list.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/util/pm_memchr.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/util/pm_state_stack.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/util/pm_string_list.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
+builtin.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
 builtin.$(OBJEXT): {$(VPATH)}assert.h
 builtin.$(OBJEXT): {$(VPATH)}atomic.h
 builtin.$(OBJEXT): {$(VPATH)}backward/2/assume.h
@@ -2785,6 +2829,8 @@ builtin.$(OBJEXT): {$(VPATH)}missing.h
 builtin.$(OBJEXT): {$(VPATH)}node.h
 builtin.$(OBJEXT): {$(VPATH)}onigmo.h
 builtin.$(OBJEXT): {$(VPATH)}oniguruma.h
+builtin.$(OBJEXT): {$(VPATH)}prism/ast.h
+builtin.$(OBJEXT): {$(VPATH)}prism/version.h
 builtin.$(OBJEXT): {$(VPATH)}ruby_assert.h
 builtin.$(OBJEXT): {$(VPATH)}ruby_atomic.h
 builtin.$(OBJEXT): {$(VPATH)}rubyparser.h
@@ -3669,6 +3715,27 @@ cont.$(OBJEXT): $(top_srcdir)/internal/thread.h
 cont.$(OBJEXT): $(top_srcdir)/internal/variable.h
 cont.$(OBJEXT): $(top_srcdir)/internal/vm.h
 cont.$(OBJEXT): $(top_srcdir)/internal/warnings.h
+cont.$(OBJEXT): $(top_srcdir)/prism/defines.h
+cont.$(OBJEXT): $(top_srcdir)/prism/diagnostic.h
+cont.$(OBJEXT): $(top_srcdir)/prism/encoding.h
+cont.$(OBJEXT): $(top_srcdir)/prism/node.h
+cont.$(OBJEXT): $(top_srcdir)/prism/options.h
+cont.$(OBJEXT): $(top_srcdir)/prism/pack.h
+cont.$(OBJEXT): $(top_srcdir)/prism/parser.h
+cont.$(OBJEXT): $(top_srcdir)/prism/prettyprint.h
+cont.$(OBJEXT): $(top_srcdir)/prism/prism.h
+cont.$(OBJEXT): $(top_srcdir)/prism/regexp.h
+cont.$(OBJEXT): $(top_srcdir)/prism/util/pm_buffer.h
+cont.$(OBJEXT): $(top_srcdir)/prism/util/pm_char.h
+cont.$(OBJEXT): $(top_srcdir)/prism/util/pm_constant_pool.h
+cont.$(OBJEXT): $(top_srcdir)/prism/util/pm_list.h
+cont.$(OBJEXT): $(top_srcdir)/prism/util/pm_memchr.h
+cont.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
+cont.$(OBJEXT): $(top_srcdir)/prism/util/pm_state_stack.h
+cont.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
+cont.$(OBJEXT): $(top_srcdir)/prism/util/pm_string_list.h
+cont.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
+cont.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
 cont.$(OBJEXT): {$(VPATH)}$(COROUTINE_H)
 cont.$(OBJEXT): {$(VPATH)}assert.h
 cont.$(OBJEXT): {$(VPATH)}atomic.h
@@ -3847,6 +3914,8 @@ cont.$(OBJEXT): {$(VPATH)}missing.h
 cont.$(OBJEXT): {$(VPATH)}node.h
 cont.$(OBJEXT): {$(VPATH)}onigmo.h
 cont.$(OBJEXT): {$(VPATH)}oniguruma.h
+cont.$(OBJEXT): {$(VPATH)}prism/ast.h
+cont.$(OBJEXT): {$(VPATH)}prism/version.h
 cont.$(OBJEXT): {$(VPATH)}ractor.h
 cont.$(OBJEXT): {$(VPATH)}ractor_core.h
 cont.$(OBJEXT): {$(VPATH)}rjit.h
@@ -6587,6 +6656,27 @@ eval.$(OBJEXT): $(top_srcdir)/internal/thread.h
 eval.$(OBJEXT): $(top_srcdir)/internal/variable.h
 eval.$(OBJEXT): $(top_srcdir)/internal/vm.h
 eval.$(OBJEXT): $(top_srcdir)/internal/warnings.h
+eval.$(OBJEXT): $(top_srcdir)/prism/defines.h
+eval.$(OBJEXT): $(top_srcdir)/prism/diagnostic.h
+eval.$(OBJEXT): $(top_srcdir)/prism/encoding.h
+eval.$(OBJEXT): $(top_srcdir)/prism/node.h
+eval.$(OBJEXT): $(top_srcdir)/prism/options.h
+eval.$(OBJEXT): $(top_srcdir)/prism/pack.h
+eval.$(OBJEXT): $(top_srcdir)/prism/parser.h
+eval.$(OBJEXT): $(top_srcdir)/prism/prettyprint.h
+eval.$(OBJEXT): $(top_srcdir)/prism/prism.h
+eval.$(OBJEXT): $(top_srcdir)/prism/regexp.h
+eval.$(OBJEXT): $(top_srcdir)/prism/util/pm_buffer.h
+eval.$(OBJEXT): $(top_srcdir)/prism/util/pm_char.h
+eval.$(OBJEXT): $(top_srcdir)/prism/util/pm_constant_pool.h
+eval.$(OBJEXT): $(top_srcdir)/prism/util/pm_list.h
+eval.$(OBJEXT): $(top_srcdir)/prism/util/pm_memchr.h
+eval.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
+eval.$(OBJEXT): $(top_srcdir)/prism/util/pm_state_stack.h
+eval.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
+eval.$(OBJEXT): $(top_srcdir)/prism/util/pm_string_list.h
+eval.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
+eval.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
 eval.$(OBJEXT): {$(VPATH)}assert.h
 eval.$(OBJEXT): {$(VPATH)}atomic.h
 eval.$(OBJEXT): {$(VPATH)}backward/2/assume.h
@@ -6767,6 +6857,8 @@ eval.$(OBJEXT): {$(VPATH)}missing.h
 eval.$(OBJEXT): {$(VPATH)}node.h
 eval.$(OBJEXT): {$(VPATH)}onigmo.h
 eval.$(OBJEXT): {$(VPATH)}oniguruma.h
+eval.$(OBJEXT): {$(VPATH)}prism/ast.h
+eval.$(OBJEXT): {$(VPATH)}prism/version.h
 eval.$(OBJEXT): {$(VPATH)}probes.dmyh
 eval.$(OBJEXT): {$(VPATH)}probes.h
 eval.$(OBJEXT): {$(VPATH)}probes_helper.h
@@ -7040,6 +7132,27 @@ gc.$(OBJEXT): $(top_srcdir)/internal/thread.h
 gc.$(OBJEXT): $(top_srcdir)/internal/variable.h
 gc.$(OBJEXT): $(top_srcdir)/internal/vm.h
 gc.$(OBJEXT): $(top_srcdir)/internal/warnings.h
+gc.$(OBJEXT): $(top_srcdir)/prism/defines.h
+gc.$(OBJEXT): $(top_srcdir)/prism/diagnostic.h
+gc.$(OBJEXT): $(top_srcdir)/prism/encoding.h
+gc.$(OBJEXT): $(top_srcdir)/prism/node.h
+gc.$(OBJEXT): $(top_srcdir)/prism/options.h
+gc.$(OBJEXT): $(top_srcdir)/prism/pack.h
+gc.$(OBJEXT): $(top_srcdir)/prism/parser.h
+gc.$(OBJEXT): $(top_srcdir)/prism/prettyprint.h
+gc.$(OBJEXT): $(top_srcdir)/prism/prism.h
+gc.$(OBJEXT): $(top_srcdir)/prism/regexp.h
+gc.$(OBJEXT): $(top_srcdir)/prism/util/pm_buffer.h
+gc.$(OBJEXT): $(top_srcdir)/prism/util/pm_char.h
+gc.$(OBJEXT): $(top_srcdir)/prism/util/pm_constant_pool.h
+gc.$(OBJEXT): $(top_srcdir)/prism/util/pm_list.h
+gc.$(OBJEXT): $(top_srcdir)/prism/util/pm_memchr.h
+gc.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
+gc.$(OBJEXT): $(top_srcdir)/prism/util/pm_state_stack.h
+gc.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
+gc.$(OBJEXT): $(top_srcdir)/prism/util/pm_string_list.h
+gc.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
+gc.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
 gc.$(OBJEXT): {$(VPATH)}assert.h
 gc.$(OBJEXT): {$(VPATH)}atomic.h
 gc.$(OBJEXT): {$(VPATH)}backward/2/assume.h
@@ -7222,6 +7335,8 @@ gc.$(OBJEXT): {$(VPATH)}missing.h
 gc.$(OBJEXT): {$(VPATH)}node.h
 gc.$(OBJEXT): {$(VPATH)}onigmo.h
 gc.$(OBJEXT): {$(VPATH)}oniguruma.h
+gc.$(OBJEXT): {$(VPATH)}prism/ast.h
+gc.$(OBJEXT): {$(VPATH)}prism/version.h
 gc.$(OBJEXT): {$(VPATH)}probes.dmyh
 gc.$(OBJEXT): {$(VPATH)}probes.h
 gc.$(OBJEXT): {$(VPATH)}ractor.h
@@ -7264,6 +7379,27 @@ goruby.$(OBJEXT): $(top_srcdir)/internal/static_assert.h
 goruby.$(OBJEXT): $(top_srcdir)/internal/variable.h
 goruby.$(OBJEXT): $(top_srcdir)/internal/vm.h
 goruby.$(OBJEXT): $(top_srcdir)/internal/warnings.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/defines.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/diagnostic.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/encoding.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/node.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/options.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/pack.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/parser.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/prettyprint.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/prism.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/regexp.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/util/pm_buffer.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/util/pm_char.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/util/pm_constant_pool.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/util/pm_list.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/util/pm_memchr.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/util/pm_state_stack.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/util/pm_string_list.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
+goruby.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
 goruby.$(OBJEXT): {$(VPATH)}assert.h
 goruby.$(OBJEXT): {$(VPATH)}atomic.h
 goruby.$(OBJEXT): {$(VPATH)}backward.h
@@ -7441,6 +7577,8 @@ goruby.$(OBJEXT): {$(VPATH)}missing.h
 goruby.$(OBJEXT): {$(VPATH)}node.h
 goruby.$(OBJEXT): {$(VPATH)}onigmo.h
 goruby.$(OBJEXT): {$(VPATH)}oniguruma.h
+goruby.$(OBJEXT): {$(VPATH)}prism/ast.h
+goruby.$(OBJEXT): {$(VPATH)}prism/version.h
 goruby.$(OBJEXT): {$(VPATH)}ruby_assert.h
 goruby.$(OBJEXT): {$(VPATH)}ruby_atomic.h
 goruby.$(OBJEXT): {$(VPATH)}rubyparser.h
@@ -7479,6 +7617,27 @@ hash.$(OBJEXT): $(top_srcdir)/internal/time.h
 hash.$(OBJEXT): $(top_srcdir)/internal/variable.h
 hash.$(OBJEXT): $(top_srcdir)/internal/vm.h
 hash.$(OBJEXT): $(top_srcdir)/internal/warnings.h
+hash.$(OBJEXT): $(top_srcdir)/prism/defines.h
+hash.$(OBJEXT): $(top_srcdir)/prism/diagnostic.h
+hash.$(OBJEXT): $(top_srcdir)/prism/encoding.h
+hash.$(OBJEXT): $(top_srcdir)/prism/node.h
+hash.$(OBJEXT): $(top_srcdir)/prism/options.h
+hash.$(OBJEXT): $(top_srcdir)/prism/pack.h
+hash.$(OBJEXT): $(top_srcdir)/prism/parser.h
+hash.$(OBJEXT): $(top_srcdir)/prism/prettyprint.h
+hash.$(OBJEXT): $(top_srcdir)/prism/prism.h
+hash.$(OBJEXT): $(top_srcdir)/prism/regexp.h
+hash.$(OBJEXT): $(top_srcdir)/prism/util/pm_buffer.h
+hash.$(OBJEXT): $(top_srcdir)/prism/util/pm_char.h
+hash.$(OBJEXT): $(top_srcdir)/prism/util/pm_constant_pool.h
+hash.$(OBJEXT): $(top_srcdir)/prism/util/pm_list.h
+hash.$(OBJEXT): $(top_srcdir)/prism/util/pm_memchr.h
+hash.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
+hash.$(OBJEXT): $(top_srcdir)/prism/util/pm_state_stack.h
+hash.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
+hash.$(OBJEXT): $(top_srcdir)/prism/util/pm_string_list.h
+hash.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
+hash.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
 hash.$(OBJEXT): {$(VPATH)}assert.h
 hash.$(OBJEXT): {$(VPATH)}atomic.h
 hash.$(OBJEXT): {$(VPATH)}backward/2/assume.h
@@ -7654,6 +7813,8 @@ hash.$(OBJEXT): {$(VPATH)}missing.h
 hash.$(OBJEXT): {$(VPATH)}node.h
 hash.$(OBJEXT): {$(VPATH)}onigmo.h
 hash.$(OBJEXT): {$(VPATH)}oniguruma.h
+hash.$(OBJEXT): {$(VPATH)}prism/ast.h
+hash.$(OBJEXT): {$(VPATH)}prism/version.h
 hash.$(OBJEXT): {$(VPATH)}probes.dmyh
 hash.$(OBJEXT): {$(VPATH)}probes.h
 hash.$(OBJEXT): {$(VPATH)}ractor.h
@@ -8520,6 +8681,27 @@ load.$(OBJEXT): $(top_srcdir)/internal/thread.h
 load.$(OBJEXT): $(top_srcdir)/internal/variable.h
 load.$(OBJEXT): $(top_srcdir)/internal/vm.h
 load.$(OBJEXT): $(top_srcdir)/internal/warnings.h
+load.$(OBJEXT): $(top_srcdir)/prism/defines.h
+load.$(OBJEXT): $(top_srcdir)/prism/diagnostic.h
+load.$(OBJEXT): $(top_srcdir)/prism/encoding.h
+load.$(OBJEXT): $(top_srcdir)/prism/node.h
+load.$(OBJEXT): $(top_srcdir)/prism/options.h
+load.$(OBJEXT): $(top_srcdir)/prism/pack.h
+load.$(OBJEXT): $(top_srcdir)/prism/parser.h
+load.$(OBJEXT): $(top_srcdir)/prism/prettyprint.h
+load.$(OBJEXT): $(top_srcdir)/prism/prism.h
+load.$(OBJEXT): $(top_srcdir)/prism/regexp.h
+load.$(OBJEXT): $(top_srcdir)/prism/util/pm_buffer.h
+load.$(OBJEXT): $(top_srcdir)/prism/util/pm_char.h
+load.$(OBJEXT): $(top_srcdir)/prism/util/pm_constant_pool.h
+load.$(OBJEXT): $(top_srcdir)/prism/util/pm_list.h
+load.$(OBJEXT): $(top_srcdir)/prism/util/pm_memchr.h
+load.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
+load.$(OBJEXT): $(top_srcdir)/prism/util/pm_state_stack.h
+load.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
+load.$(OBJEXT): $(top_srcdir)/prism/util/pm_string_list.h
+load.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
+load.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
 load.$(OBJEXT): {$(VPATH)}assert.h
 load.$(OBJEXT): {$(VPATH)}atomic.h
 load.$(OBJEXT): {$(VPATH)}backward/2/assume.h
@@ -8697,6 +8879,8 @@ load.$(OBJEXT): {$(VPATH)}missing.h
 load.$(OBJEXT): {$(VPATH)}node.h
 load.$(OBJEXT): {$(VPATH)}onigmo.h
 load.$(OBJEXT): {$(VPATH)}oniguruma.h
+load.$(OBJEXT): {$(VPATH)}prism/ast.h
+load.$(OBJEXT): {$(VPATH)}prism/version.h
 load.$(OBJEXT): {$(VPATH)}probes.dmyh
 load.$(OBJEXT): {$(VPATH)}probes.h
 load.$(OBJEXT): {$(VPATH)}ruby_assert.h
@@ -9811,6 +9995,27 @@ miniinit.$(OBJEXT): $(top_srcdir)/internal/static_assert.h
 miniinit.$(OBJEXT): $(top_srcdir)/internal/variable.h
 miniinit.$(OBJEXT): $(top_srcdir)/internal/vm.h
 miniinit.$(OBJEXT): $(top_srcdir)/internal/warnings.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/defines.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/diagnostic.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/encoding.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/node.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/options.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/pack.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/parser.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/prettyprint.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/prism.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/regexp.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/util/pm_buffer.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/util/pm_char.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/util/pm_constant_pool.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/util/pm_list.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/util/pm_memchr.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/util/pm_state_stack.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/util/pm_string_list.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
+miniinit.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
 miniinit.$(OBJEXT): {$(VPATH)}array.rb
 miniinit.$(OBJEXT): {$(VPATH)}assert.h
 miniinit.$(OBJEXT): {$(VPATH)}ast.rb
@@ -10000,6 +10205,8 @@ miniinit.$(OBJEXT): {$(VPATH)}onigmo.h
 miniinit.$(OBJEXT): {$(VPATH)}oniguruma.h
 miniinit.$(OBJEXT): {$(VPATH)}pack.rb
 miniinit.$(OBJEXT): {$(VPATH)}prelude.rb
+miniinit.$(OBJEXT): {$(VPATH)}prism/ast.h
+miniinit.$(OBJEXT): {$(VPATH)}prism/version.h
 miniinit.$(OBJEXT): {$(VPATH)}ractor.rb
 miniinit.$(OBJEXT): {$(VPATH)}rjit.rb
 miniinit.$(OBJEXT): {$(VPATH)}rjit_c.rb
@@ -12335,6 +12542,27 @@ proc.$(OBJEXT): $(top_srcdir)/internal/symbol.h
 proc.$(OBJEXT): $(top_srcdir)/internal/variable.h
 proc.$(OBJEXT): $(top_srcdir)/internal/vm.h
 proc.$(OBJEXT): $(top_srcdir)/internal/warnings.h
+proc.$(OBJEXT): $(top_srcdir)/prism/defines.h
+proc.$(OBJEXT): $(top_srcdir)/prism/diagnostic.h
+proc.$(OBJEXT): $(top_srcdir)/prism/encoding.h
+proc.$(OBJEXT): $(top_srcdir)/prism/node.h
+proc.$(OBJEXT): $(top_srcdir)/prism/options.h
+proc.$(OBJEXT): $(top_srcdir)/prism/pack.h
+proc.$(OBJEXT): $(top_srcdir)/prism/parser.h
+proc.$(OBJEXT): $(top_srcdir)/prism/prettyprint.h
+proc.$(OBJEXT): $(top_srcdir)/prism/prism.h
+proc.$(OBJEXT): $(top_srcdir)/prism/regexp.h
+proc.$(OBJEXT): $(top_srcdir)/prism/util/pm_buffer.h
+proc.$(OBJEXT): $(top_srcdir)/prism/util/pm_char.h
+proc.$(OBJEXT): $(top_srcdir)/prism/util/pm_constant_pool.h
+proc.$(OBJEXT): $(top_srcdir)/prism/util/pm_list.h
+proc.$(OBJEXT): $(top_srcdir)/prism/util/pm_memchr.h
+proc.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
+proc.$(OBJEXT): $(top_srcdir)/prism/util/pm_state_stack.h
+proc.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
+proc.$(OBJEXT): $(top_srcdir)/prism/util/pm_string_list.h
+proc.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
+proc.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
 proc.$(OBJEXT): {$(VPATH)}assert.h
 proc.$(OBJEXT): {$(VPATH)}atomic.h
 proc.$(OBJEXT): {$(VPATH)}backward/2/assume.h
@@ -12510,6 +12738,8 @@ proc.$(OBJEXT): {$(VPATH)}missing.h
 proc.$(OBJEXT): {$(VPATH)}node.h
 proc.$(OBJEXT): {$(VPATH)}onigmo.h
 proc.$(OBJEXT): {$(VPATH)}oniguruma.h
+proc.$(OBJEXT): {$(VPATH)}prism/ast.h
+proc.$(OBJEXT): {$(VPATH)}prism/version.h
 proc.$(OBJEXT): {$(VPATH)}proc.c
 proc.$(OBJEXT): {$(VPATH)}ruby_assert.h
 proc.$(OBJEXT): {$(VPATH)}ruby_atomic.h
@@ -14785,6 +15015,27 @@ rjit.$(OBJEXT): $(top_srcdir)/internal/struct.h
 rjit.$(OBJEXT): $(top_srcdir)/internal/variable.h
 rjit.$(OBJEXT): $(top_srcdir)/internal/vm.h
 rjit.$(OBJEXT): $(top_srcdir)/internal/warnings.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/defines.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/diagnostic.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/encoding.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/node.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/options.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/pack.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/parser.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/prettyprint.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/prism.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/regexp.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_buffer.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_char.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_constant_pool.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_list.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_memchr.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_state_stack.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_string_list.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
+rjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
 rjit.$(OBJEXT): {$(VPATH)}assert.h
 rjit.$(OBJEXT): {$(VPATH)}atomic.h
 rjit.$(OBJEXT): {$(VPATH)}backward/2/assume.h
@@ -14965,6 +15216,8 @@ rjit.$(OBJEXT): {$(VPATH)}missing.h
 rjit.$(OBJEXT): {$(VPATH)}node.h
 rjit.$(OBJEXT): {$(VPATH)}onigmo.h
 rjit.$(OBJEXT): {$(VPATH)}oniguruma.h
+rjit.$(OBJEXT): {$(VPATH)}prism/ast.h
+rjit.$(OBJEXT): {$(VPATH)}prism/version.h
 rjit.$(OBJEXT): {$(VPATH)}ractor.h
 rjit.$(OBJEXT): {$(VPATH)}ractor_core.h
 rjit.$(OBJEXT): {$(VPATH)}rjit.c
@@ -15013,6 +15266,27 @@ rjit_c.$(OBJEXT): $(top_srcdir)/internal/struct.h
 rjit_c.$(OBJEXT): $(top_srcdir)/internal/variable.h
 rjit_c.$(OBJEXT): $(top_srcdir)/internal/vm.h
 rjit_c.$(OBJEXT): $(top_srcdir)/internal/warnings.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/defines.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/diagnostic.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/encoding.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/node.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/options.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/pack.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/parser.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/prettyprint.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/prism.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/regexp.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/util/pm_buffer.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/util/pm_char.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/util/pm_constant_pool.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/util/pm_list.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/util/pm_memchr.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/util/pm_state_stack.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/util/pm_string_list.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
+rjit_c.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
 rjit_c.$(OBJEXT): {$(VPATH)}assert.h
 rjit_c.$(OBJEXT): {$(VPATH)}atomic.h
 rjit_c.$(OBJEXT): {$(VPATH)}backward/2/assume.h
@@ -15192,6 +15466,8 @@ rjit_c.$(OBJEXT): {$(VPATH)}missing.h
 rjit_c.$(OBJEXT): {$(VPATH)}node.h
 rjit_c.$(OBJEXT): {$(VPATH)}onigmo.h
 rjit_c.$(OBJEXT): {$(VPATH)}oniguruma.h
+rjit_c.$(OBJEXT): {$(VPATH)}prism/ast.h
+rjit_c.$(OBJEXT): {$(VPATH)}prism/version.h
 rjit_c.$(OBJEXT): {$(VPATH)}probes.dmyh
 rjit_c.$(OBJEXT): {$(VPATH)}probes.h
 rjit_c.$(OBJEXT): {$(VPATH)}probes_helper.h
@@ -17497,6 +17773,27 @@ thread.$(OBJEXT): $(top_srcdir)/internal/time.h
 thread.$(OBJEXT): $(top_srcdir)/internal/variable.h
 thread.$(OBJEXT): $(top_srcdir)/internal/vm.h
 thread.$(OBJEXT): $(top_srcdir)/internal/warnings.h
+thread.$(OBJEXT): $(top_srcdir)/prism/defines.h
+thread.$(OBJEXT): $(top_srcdir)/prism/diagnostic.h
+thread.$(OBJEXT): $(top_srcdir)/prism/encoding.h
+thread.$(OBJEXT): $(top_srcdir)/prism/node.h
+thread.$(OBJEXT): $(top_srcdir)/prism/options.h
+thread.$(OBJEXT): $(top_srcdir)/prism/pack.h
+thread.$(OBJEXT): $(top_srcdir)/prism/parser.h
+thread.$(OBJEXT): $(top_srcdir)/prism/prettyprint.h
+thread.$(OBJEXT): $(top_srcdir)/prism/prism.h
+thread.$(OBJEXT): $(top_srcdir)/prism/regexp.h
+thread.$(OBJEXT): $(top_srcdir)/prism/util/pm_buffer.h
+thread.$(OBJEXT): $(top_srcdir)/prism/util/pm_char.h
+thread.$(OBJEXT): $(top_srcdir)/prism/util/pm_constant_pool.h
+thread.$(OBJEXT): $(top_srcdir)/prism/util/pm_list.h
+thread.$(OBJEXT): $(top_srcdir)/prism/util/pm_memchr.h
+thread.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
+thread.$(OBJEXT): $(top_srcdir)/prism/util/pm_state_stack.h
+thread.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
+thread.$(OBJEXT): $(top_srcdir)/prism/util/pm_string_list.h
+thread.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
+thread.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
 thread.$(OBJEXT): {$(VPATH)}$(COROUTINE_H)
 thread.$(OBJEXT): {$(VPATH)}assert.h
 thread.$(OBJEXT): {$(VPATH)}atomic.h
@@ -17678,6 +17975,8 @@ thread.$(OBJEXT): {$(VPATH)}missing.h
 thread.$(OBJEXT): {$(VPATH)}node.h
 thread.$(OBJEXT): {$(VPATH)}onigmo.h
 thread.$(OBJEXT): {$(VPATH)}oniguruma.h
+thread.$(OBJEXT): {$(VPATH)}prism/ast.h
+thread.$(OBJEXT): {$(VPATH)}prism/version.h
 thread.$(OBJEXT): {$(VPATH)}ractor.h
 thread.$(OBJEXT): {$(VPATH)}ractor_core.h
 thread.$(OBJEXT): {$(VPATH)}rjit.h
@@ -18723,6 +19022,27 @@ vm.$(OBJEXT): $(top_srcdir)/internal/thread.h
 vm.$(OBJEXT): $(top_srcdir)/internal/variable.h
 vm.$(OBJEXT): $(top_srcdir)/internal/vm.h
 vm.$(OBJEXT): $(top_srcdir)/internal/warnings.h
+vm.$(OBJEXT): $(top_srcdir)/prism/defines.h
+vm.$(OBJEXT): $(top_srcdir)/prism/diagnostic.h
+vm.$(OBJEXT): $(top_srcdir)/prism/encoding.h
+vm.$(OBJEXT): $(top_srcdir)/prism/node.h
+vm.$(OBJEXT): $(top_srcdir)/prism/options.h
+vm.$(OBJEXT): $(top_srcdir)/prism/pack.h
+vm.$(OBJEXT): $(top_srcdir)/prism/parser.h
+vm.$(OBJEXT): $(top_srcdir)/prism/prettyprint.h
+vm.$(OBJEXT): $(top_srcdir)/prism/prism.h
+vm.$(OBJEXT): $(top_srcdir)/prism/regexp.h
+vm.$(OBJEXT): $(top_srcdir)/prism/util/pm_buffer.h
+vm.$(OBJEXT): $(top_srcdir)/prism/util/pm_char.h
+vm.$(OBJEXT): $(top_srcdir)/prism/util/pm_constant_pool.h
+vm.$(OBJEXT): $(top_srcdir)/prism/util/pm_list.h
+vm.$(OBJEXT): $(top_srcdir)/prism/util/pm_memchr.h
+vm.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
+vm.$(OBJEXT): $(top_srcdir)/prism/util/pm_state_stack.h
+vm.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
+vm.$(OBJEXT): $(top_srcdir)/prism/util/pm_string_list.h
+vm.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
+vm.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
 vm.$(OBJEXT): {$(VPATH)}assert.h
 vm.$(OBJEXT): {$(VPATH)}atomic.h
 vm.$(OBJEXT): {$(VPATH)}backward/2/assume.h
@@ -18903,6 +19223,8 @@ vm.$(OBJEXT): {$(VPATH)}missing.h
 vm.$(OBJEXT): {$(VPATH)}node.h
 vm.$(OBJEXT): {$(VPATH)}onigmo.h
 vm.$(OBJEXT): {$(VPATH)}oniguruma.h
+vm.$(OBJEXT): {$(VPATH)}prism/ast.h
+vm.$(OBJEXT): {$(VPATH)}prism/version.h
 vm.$(OBJEXT): {$(VPATH)}probes.dmyh
 vm.$(OBJEXT): {$(VPATH)}probes.h
 vm.$(OBJEXT): {$(VPATH)}probes_helper.h
@@ -18954,6 +19276,27 @@ vm_backtrace.$(OBJEXT): $(top_srcdir)/internal/string.h
 vm_backtrace.$(OBJEXT): $(top_srcdir)/internal/variable.h
 vm_backtrace.$(OBJEXT): $(top_srcdir)/internal/vm.h
 vm_backtrace.$(OBJEXT): $(top_srcdir)/internal/warnings.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/defines.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/diagnostic.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/encoding.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/node.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/options.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/pack.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/parser.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/prettyprint.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/prism.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/regexp.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/util/pm_buffer.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/util/pm_char.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/util/pm_constant_pool.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/util/pm_list.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/util/pm_memchr.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/util/pm_state_stack.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/util/pm_string_list.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
+vm_backtrace.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
 vm_backtrace.$(OBJEXT): {$(VPATH)}assert.h
 vm_backtrace.$(OBJEXT): {$(VPATH)}atomic.h
 vm_backtrace.$(OBJEXT): {$(VPATH)}backward/2/assume.h
@@ -19130,6 +19473,8 @@ vm_backtrace.$(OBJEXT): {$(VPATH)}missing.h
 vm_backtrace.$(OBJEXT): {$(VPATH)}node.h
 vm_backtrace.$(OBJEXT): {$(VPATH)}onigmo.h
 vm_backtrace.$(OBJEXT): {$(VPATH)}oniguruma.h
+vm_backtrace.$(OBJEXT): {$(VPATH)}prism/ast.h
+vm_backtrace.$(OBJEXT): {$(VPATH)}prism/version.h
 vm_backtrace.$(OBJEXT): {$(VPATH)}ruby_assert.h
 vm_backtrace.$(OBJEXT): {$(VPATH)}ruby_atomic.h
 vm_backtrace.$(OBJEXT): {$(VPATH)}rubyparser.h
@@ -19158,6 +19503,27 @@ vm_dump.$(OBJEXT): $(top_srcdir)/internal/static_assert.h
 vm_dump.$(OBJEXT): $(top_srcdir)/internal/variable.h
 vm_dump.$(OBJEXT): $(top_srcdir)/internal/vm.h
 vm_dump.$(OBJEXT): $(top_srcdir)/internal/warnings.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/defines.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/diagnostic.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/encoding.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/node.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/options.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/pack.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/parser.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/prettyprint.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/prism.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/regexp.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/util/pm_buffer.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/util/pm_char.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/util/pm_constant_pool.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/util/pm_list.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/util/pm_memchr.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/util/pm_state_stack.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/util/pm_string_list.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
+vm_dump.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
 vm_dump.$(OBJEXT): {$(VPATH)}addr2line.h
 vm_dump.$(OBJEXT): {$(VPATH)}assert.h
 vm_dump.$(OBJEXT): {$(VPATH)}atomic.h
@@ -19332,6 +19698,8 @@ vm_dump.$(OBJEXT): {$(VPATH)}missing.h
 vm_dump.$(OBJEXT): {$(VPATH)}node.h
 vm_dump.$(OBJEXT): {$(VPATH)}onigmo.h
 vm_dump.$(OBJEXT): {$(VPATH)}oniguruma.h
+vm_dump.$(OBJEXT): {$(VPATH)}prism/ast.h
+vm_dump.$(OBJEXT): {$(VPATH)}prism/version.h
 vm_dump.$(OBJEXT): {$(VPATH)}procstat_vm.c
 vm_dump.$(OBJEXT): {$(VPATH)}ractor.h
 vm_dump.$(OBJEXT): {$(VPATH)}ractor_core.h
@@ -19570,6 +19938,27 @@ vm_trace.$(OBJEXT): $(top_srcdir)/internal/symbol.h
 vm_trace.$(OBJEXT): $(top_srcdir)/internal/variable.h
 vm_trace.$(OBJEXT): $(top_srcdir)/internal/vm.h
 vm_trace.$(OBJEXT): $(top_srcdir)/internal/warnings.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/defines.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/diagnostic.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/encoding.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/node.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/options.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/pack.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/parser.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/prettyprint.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/prism.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/regexp.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/util/pm_buffer.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/util/pm_char.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/util/pm_constant_pool.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/util/pm_list.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/util/pm_memchr.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/util/pm_state_stack.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/util/pm_string_list.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
+vm_trace.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
 vm_trace.$(OBJEXT): {$(VPATH)}assert.h
 vm_trace.$(OBJEXT): {$(VPATH)}atomic.h
 vm_trace.$(OBJEXT): {$(VPATH)}backward/2/assume.h
@@ -19747,6 +20136,8 @@ vm_trace.$(OBJEXT): {$(VPATH)}missing.h
 vm_trace.$(OBJEXT): {$(VPATH)}node.h
 vm_trace.$(OBJEXT): {$(VPATH)}onigmo.h
 vm_trace.$(OBJEXT): {$(VPATH)}oniguruma.h
+vm_trace.$(OBJEXT): {$(VPATH)}prism/ast.h
+vm_trace.$(OBJEXT): {$(VPATH)}prism/version.h
 vm_trace.$(OBJEXT): {$(VPATH)}ractor.h
 vm_trace.$(OBJEXT): {$(VPATH)}rjit.h
 vm_trace.$(OBJEXT): {$(VPATH)}ruby_assert.h
@@ -19986,6 +20377,27 @@ yjit.$(OBJEXT): $(top_srcdir)/internal/string.h
 yjit.$(OBJEXT): $(top_srcdir)/internal/variable.h
 yjit.$(OBJEXT): $(top_srcdir)/internal/vm.h
 yjit.$(OBJEXT): $(top_srcdir)/internal/warnings.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/defines.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/diagnostic.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/encoding.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/node.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/options.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/pack.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/parser.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/prettyprint.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/prism.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/regexp.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_buffer.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_char.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_constant_pool.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_list.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_memchr.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_state_stack.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_string_list.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
+yjit.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
 yjit.$(OBJEXT): {$(VPATH)}assert.h
 yjit.$(OBJEXT): {$(VPATH)}atomic.h
 yjit.$(OBJEXT): {$(VPATH)}backward/2/assume.h
@@ -20166,6 +20578,8 @@ yjit.$(OBJEXT): {$(VPATH)}missing.h
 yjit.$(OBJEXT): {$(VPATH)}node.h
 yjit.$(OBJEXT): {$(VPATH)}onigmo.h
 yjit.$(OBJEXT): {$(VPATH)}oniguruma.h
+yjit.$(OBJEXT): {$(VPATH)}prism/ast.h
+yjit.$(OBJEXT): {$(VPATH)}prism/version.h
 yjit.$(OBJEXT): {$(VPATH)}probes.dmyh
 yjit.$(OBJEXT): {$(VPATH)}probes.h
 yjit.$(OBJEXT): {$(VPATH)}probes_helper.h

iseq.c

@@ -1487,6 +1487,22 @@ iseqw_s_compile_file_prism(int argc, VALUE *argv, VALUE self)
     return iseqw_new(iseq);
 }
 
+rb_iseq_t *
+rb_iseq_new_main_prism(pm_string_t *input, pm_options_t *options, VALUE path) {
+    pm_parser_t parser;
+    pm_parser_init(&parser, pm_string_source(input), pm_string_length(input), options);
+
+    if (NIL_P(path)) path = rb_fstring_lit("<compiled>");
+    int start_line = 0;
+    pm_options_line_set(options, start_line);
+
+    rb_iseq_t *iseq = iseq_alloc();
+    iseqw_s_compile_prism_compile(&parser, Qnil, iseq, path, path, start_line);
+
+    pm_parser_free(&parser);
+    return iseq;
+}
+
 /*
  *  call-seq:
  *      InstructionSequence.compile_file(file[, options]) -> iseq

iseq.h

@@ -13,6 +13,7 @@
 #include "internal/gc.h"
 #include "shape.h"
 #include "vm_core.h"
+#include "prism/prism.h"
 
 RUBY_EXTERN const int ruby_api_version[];
 #define ISEQ_MAJOR_VERSION ((unsigned int)ruby_api_version[0])
@@ -173,6 +174,7 @@ void rb_iseq_init_trace(rb_iseq_t *iseq);
 int rb_iseq_add_local_tracepoint_recursively(const rb_iseq_t *iseq, rb_event_flag_t turnon_events, VALUE tpval, unsigned int target_line, bool target_bmethod);
 int rb_iseq_remove_local_tracepoint_recursively(const rb_iseq_t *iseq, VALUE tpval);
 const rb_iseq_t *rb_iseq_load_iseq(VALUE fname);
+rb_iseq_t * rb_iseq_new_main_prism(pm_string_t *input, pm_options_t *options, VALUE path);
 
 #if VM_INSN_INFO_TABLE_IMPL == 2
 unsigned int *rb_iseq_insns_info_decode_positions(const struct rb_iseq_constant_body *body);

load.c

@@ -16,6 +16,7 @@
 #include "probes.h"
 #include "darray.h"
 #include "ruby/encoding.h"
+#include "prism/prism.h"
 #include "ruby/util.h"
 
 static VALUE ruby_dln_librefs;
@@ -717,8 +718,22 @@ static inline void
 load_iseq_eval(rb_execution_context_t *ec, VALUE fname)
 {
     const rb_iseq_t *iseq = rb_iseq_load_iseq(fname);
-
     if (!iseq) {
+        if (*rb_ruby_prism_ptr()) {
+            pm_string_t input;
+            pm_options_t options = { 0 };
+
+            pm_string_mapped_init(&input, RSTRING_PTR(fname));
+            pm_options_filepath_set(&options, RSTRING_PTR(fname));
+
+            pm_parser_t parser;
+            pm_parser_init(&parser, pm_string_source(&input), pm_string_length(&input), &options);
+
+            iseq = rb_iseq_new_main_prism(&input, &options, fname);
+
+            pm_string_free(&input);
+            pm_options_free(&options);
+        } else {
             rb_execution_context_t *ec = GET_EC();
             VALUE v = rb_vm_push_frame_fname(ec, fname);
             rb_ast_t *ast;
@@ -735,6 +750,7 @@ load_iseq_eval(rb_execution_context_t *ec, VALUE fname)
             rb_vm_pop_frame(ec);
             RB_GC_GUARD(v);
         }
+    }
     rb_exec_event_hook_script_compiled(ec, iseq, Qnil);
     rb_iseq_eval(iseq);
 }

prism/prism.h

@@ -42,6 +42,17 @@
  */
 PRISM_EXPORTED_FUNCTION const char * pm_version(void);
 
+
+/**
+ * @private
+ *
+ * This is used to decide of the prism parser should be used.
+ *
+ * @retval  true       Use Prism to parse files
+ * @retval  false      Use standard parser
+ */
+bool *rb_ruby_prism_ptr(void);
+
 /**
  * Initialize a parser with the given start and end pointers.
  *

ractor_core.h

@@ -186,6 +186,7 @@ struct rb_ractor_struct {
     VALUE r_stderr;
     VALUE verbose;
     VALUE debug;
+    bool prism;
 
     rb_ractor_newobj_cache_t newobj_cache;
 

ruby.c

@@ -362,6 +362,7 @@ usage(const char *name, int help, int highlight, int columns)
           "enable or disable features. see below for available features"),
         M("--external-encoding=encoding",           ", --internal-encoding=encoding",
           "specify the default external or internal character encoding"),
+        M("--prism",                                "", "parse and compile using prism"),
         M("--backtrace-limit=num",                  "", "limit the maximum length of backtrace"),
         M("--verbose",                              "", "turn on verbose mode and disable script from stdin"),
         M("--version",                              "", "print the version number, then exit"),
@@ -1420,6 +1421,9 @@ proc_long_options(ruby_cmdline_options_t *opt, const char *s, long argc, char **
         opt->verbose = 1;
         ruby_verbose = Qtrue;
     }
+    else if (strcmp("prism", s) == 0) {
+        (*rb_ruby_prism_ptr()) = true;
+    }
     else if (strcmp("jit", s) == 0) {
 #if !USE_RJIT
         rb_warn("Ruby was built without JIT support");
@@ -1753,6 +1757,9 @@ ruby_opt_init(ruby_cmdline_options_t *opt)
         rb_warn_deprecated("The environment variable RUBY_GC_HEAP_INIT_SLOTS",
                            "environment variables RUBY_GC_HEAP_%d_INIT_SLOTS");
     }
+    if (getenv("RUBY_PRISM")) {
+        (*rb_ruby_prism_ptr()) = true;
+    }
 
 #if USE_RJIT
     // rb_call_builtin_inits depends on RubyVM::RJIT.enabled?
@@ -1971,7 +1978,7 @@ process_options(int argc, char **argv, ruby_cmdline_options_t *opt)
     rb_ast_t *ast = 0;
     VALUE parser;
     VALUE script_name;
-    const rb_iseq_t *iseq;
+    rb_iseq_t *iseq;
     rb_encoding *enc, *lenc;
 #if UTF8_PATH
     rb_encoding *ienc = 0;
@@ -2239,6 +2246,7 @@ process_options(int argc, char **argv, ruby_cmdline_options_t *opt)
     ruby_set_argv(argc, argv);
     opt->sflag = process_sflag(opt->sflag);
 
+    if (!(*rb_ruby_prism_ptr())) {
         if (opt->e_script) {
             VALUE progname = rb_progname;
             rb_encoding *eenc;
@@ -2273,6 +2281,7 @@ process_options(int argc, char **argv, ruby_cmdline_options_t *opt)
             rb_parser_set_context(parser, 0, f == rb_stdin);
             ast = load_file(parser, opt->script_name, f, 1, opt);
         }
+    }
     ruby_set_script_name(opt->script_name);
     if (dump & DUMP_BIT(yydebug)) {
         dump &= ~DUMP_BIT(yydebug);
@@ -2296,7 +2305,7 @@ process_options(int argc, char **argv, ruby_cmdline_options_t *opt)
         rb_enc_set_default_internal(Qnil);
     rb_stdio_set_default_encoding();
 
-    if (!ast->body.root) {
+    if (!(*rb_ruby_prism_ptr()) && !ast->body.root) {
         rb_ast_dispose(ast);
         return Qfalse;
     }
@@ -2371,6 +2380,23 @@ process_options(int argc, char **argv, ruby_cmdline_options_t *opt)
             }
         }
 
+        if ((*rb_ruby_prism_ptr())) {
+            pm_string_t input;
+            pm_options_t options = { 0 };
+
+            if (opt->e_script) {
+                pm_string_constant_init(&input, RSTRING_PTR(opt->e_script), RSTRING_LEN(opt->e_script));
+                pm_options_filepath_set(&options, "-e");
+            } else {
+                pm_string_mapped_init(&input, RSTRING_PTR(opt->script_name));
+                pm_options_filepath_set(&options, RSTRING_PTR(opt->script_name));
+            }
+
+            iseq = rb_iseq_new_main_prism(&input, &options, path);
+
+            pm_string_free(&input);
+            pm_options_free(&options);
+        } else {
             rb_binding_t *toplevel_binding;
             GetBindingPtr(rb_const_get(rb_cObject, rb_intern("TOPLEVEL_BINDING")),
                           toplevel_binding);
@@ -2378,6 +2404,7 @@ process_options(int argc, char **argv, ruby_cmdline_options_t *opt)
             iseq = rb_iseq_new_main(&ast->body, opt->script_name, path, vm_block_iseq(base_block), !(dump & DUMP_BIT(insns_without_opt)));
             rb_ast_dispose(ast);
         }
+    }
 
     if (dump & (DUMP_BIT(insns) | DUMP_BIT(insns_without_opt))) {
         rb_io_write(rb_stdout, rb_iseq_disasm((const rb_iseq_t *)iseq));
@@ -2932,6 +2959,7 @@ ruby_process_options(int argc, char **argv)
     ruby_cmdline_options_t opt;
     VALUE iseq;
     const char *script_name = (argc > 0 && argv[0]) ? argv[0] : ruby_engine;
+    (*rb_ruby_prism_ptr()) = false;
 
     if (!origarg.argv || origarg.argc <= 0) {
         origarg.argc = argc;

vm.c

@@ -4192,6 +4192,13 @@ rb_ruby_verbose_ptr(void)
     return &cr->verbose;
 }
 
+bool *
+rb_ruby_prism_ptr(void)
+{
+    rb_ractor_t *cr = GET_RACTOR();
+    return &cr->prism;
+}
+
 VALUE *
 rb_ruby_debug_ptr(void)
 {