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+# Core Classes
+
+## Array
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+15.2.12 |  Enumerable | src/array.c
+
+### Class Methods
+
+#### []
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.4.1 | src/array.c | mrb_ary_s_create | 215
+
+### Methods
+
+#### *
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.1 | src/array.c | mrb_ary_times | 352
+
+#### +
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.2 | src/array.c | mrb_ary_plus | 256
+
+#### <<
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.3 | src/array.c | mrb_ary_push_m | 448
+
+#### <=>
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.36 | src/array.c | mrb_ary_cmp | 293
+
+#### ==
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.33 | src/array.c | mrb_ary_equal | 1057
+
+#### []
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.4 | src/array.c | mrb_ary_aget | 680
+
+#### []=
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.5 | src/array.c | mrb_ary_aset | 713
+
+#### clear
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.6 | src/array.c | mrb_ary_clear | 864
+
+#### concat
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.8 | src/array.c | mrb_ary_concat_m | 245
+
+#### delete_at
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.9 | src/array.c | mrb_ary_delete_at | 739
+
+#### empty?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.12 | src/array.c | mrb_ary_empty_p | 878
+
+#### eql?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.34 | src/array.c | mrb_ary_eql | 1092
+
+#### first
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.13 | src/array.c | mrb_ary_first | 768
+
+#### index
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.14 | src/array.c | mrb_ary_index_m | 815
+
+#### initialize_copy
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.16 | src/array.c | mrb_ary_replace_m | 341
+
+#### inspect
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.31 | src/array.c | mrb_ary_inspect | 953
+
+#### join
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.17 | src/array.c | mrb_ary_join_m | 1033
+
+#### last
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.18 | src/array.c | mrb_ary_last | 788
+
+#### length
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.19 | src/array.c | mrb_ary_size | 856
+
+#### pop
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.21 | src/array.c | mrb_ary_pop | 462
+
+#### push
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.22 | src/array.c | mrb_ary_push_m | 448
+
+#### replace
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.23 | src/array.c | mrb_ary_replace_m | 341
+
+#### reverse
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.24 | src/array.c | mrb_ary_reverse | 400
+
+#### reverse!
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.25 | src/array.c | mrb_ary_reverse_bang | 379
+
+#### rindex
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.26 | src/array.c | mrb_ary_rindex_m | 830
+
+#### shift
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.27 | src/array.c | mrb_ary_shift | 473
+
+#### size
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.28 | src/array.c | mrb_ary_size | 856
+
+#### slice
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.29 | src/array.c | mrb_ary_aget | 680
+
+#### unshift
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.12.5.30 | src/array.c | mrb_ary_unshift_m | 533
+
+## Exception
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+15.2.22 |  n/a | src/error.c
+
+### Class Methods
+
+#### exception
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/class.c | mrb_instance_new | 1054
+
+### Methods
+
+#### ==
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/error.c | exc_equal | 160
+
+#### exception
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/error.c | exc_exception | 66
+
+#### initialize
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/error.c | exc_initialize | 42
+
+#### inspect
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/error.c | exc_inspect | 122
+
+#### message
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/error.c | exc_message | 109
+
+#### to_s
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/error.c | exc_to_s | 90
+
+## FalseClass
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+n/a |  n/a | src/object.c
+
+### Methods
+
+#### &
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.6.3.1 | src/object.c | false_and | 201
+
+#### ^
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.6.3.2 | src/object.c | false_xor | 220
+
+#### inspect
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/object.c | false_to_s | 257
+
+#### to_s
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.6.3.3 | src/object.c | false_to_s | 257
+
+#### |
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.6.3.4 | src/object.c | false_or | 240
+
+## Fixnum
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+n/a |  n/a | src/numeric.c
+
+### Methods
+
+#### %
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.5 | src/numeric.c | fix_mod | 818
+
+#### &
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.9 | src/numeric.c | fix_and | 944
+
+#### *
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.3 | src/numeric.c | fix_mul | 771
+
+#### +
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.1 | src/numeric.c | fix_plus | 1195
+
+#### -
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.2 | src/numeric.c | fix_minus | 1234
+
+#### -@
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.7.4.2 | src/numeric.c | fix_uminus | 71
+
+#### <<
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.12 | src/numeric.c | fix_lshift | 1049
+
+#### ==
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.7 | src/numeric.c | fix_equal | 889
+
+#### >>
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.13 | src/numeric.c | fix_rshift | 1083
+
+#### ^
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.11 | src/numeric.c | fix_xor | 986
+
+#### divmod
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.30 | src/numeric.c | fix_divmod | 849
+
+#### eql?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.16 | src/numeric.c | num_eql | 385
+
+#### hash
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.18 | src/numeric.c | flo_hash | 451
+
+#### inspect
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/numeric.c | fix_to_s | 1289
+
+#### next
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.19 | src/numeric.c | int_succ | 728
+
+#### succ
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.21 | src/numeric.c | fix_succ | 711
+
+#### to_f
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.23 | src/numeric.c | fix_to_f | 1118
+
+#### to_s
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.25 | src/numeric.c | fix_to_s | 1289
+
+#### |
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.10 | src/numeric.c | fix_or | 965
+
+#### ~
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.8 | src/numeric.c | fix_rev | 915
+
+## Float
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+15.2.9 |  n/a | src/numeric.c
+
+### Methods
+
+#### %
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.9.3.5 | src/numeric.c | flo_mod | 360
+
+#### *
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.9.3.3 | src/numeric.c | flo_mul | 313
+
+#### +
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.9.3.1 | src/numeric.c | flo_plus | 1345
+
+#### -
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.9.3.2 | src/numeric.c | flo_minus | 295
+
+#### ==
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.9.3.7 | src/numeric.c | flo_eq | 422
+
+#### ceil
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.9.3.8 | src/numeric.c | flo_ceil | 568
+
+#### finite?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.9.3.9 | src/numeric.c | flo_finite_p | 519
+
+#### floor
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.9.3.10 | src/numeric.c | flo_floor | 543
+
+#### infinite?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.9.3.11 | src/numeric.c | flo_infinite_p | 497
+
+#### inspect
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/numeric.c | flo_to_s | 276
+
+#### round
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.9.3.12 | src/numeric.c | flo_round | 610
+
+#### to_f
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.9.3.13 | src/numeric.c | flo_to_f | 478
+
+#### to_i
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.9.3.14 | src/numeric.c | flo_truncate | 661
+
+#### to_int
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/numeric.c | flo_truncate | 661
+
+#### to_s
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.9.3.16 | src/numeric.c | flo_to_s | 276
+
+#### truncate
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.9.3.15 | src/numeric.c | flo_truncate | 661
+
+## Hash
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+15.2.13 |  Enumerable | src/hash.c
+
+### Methods
+
+#### ==
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.1 | src/hash.c | mrb_hash_equal | 1062
+
+#### []
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.2 | src/hash.c | mrb_hash_aget | 323
+
+#### []=
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.3 | src/hash.c | mrb_hash_aset | 687
+
+#### __delete
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.8 | src/hash.c | mrb_hash_delete | 524
+
+#### __init_core
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.16 | src/hash.c | mrb_hash_init_core | 245
+
+#### clear
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.4 | src/hash.c | mrb_hash_clear | 659
+
+#### default
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.5 | src/hash.c | mrb_hash_default | 383
+
+#### default=
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.6 | src/hash.c | mrb_hash_set_default | 422
+
+#### default_proc
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.7 | src/hash.c | mrb_hash_default_proc | 451
+
+#### default_proc=
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.7 | src/hash.c | mrb_hash_set_default_proc | 473
+
+#### empty?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.12 | src/hash.c | mrb_hash_empty_p | 776
+
+#### eql?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.32 | src/hash.c | mrb_hash_eql | 1080
+
+#### has_key?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.13 | src/hash.c | mrb_hash_has_key | 949
+
+#### has_value?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.14 | src/hash.c | mrb_hash_has_value | 992
+
+#### include?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.15 | src/hash.c | mrb_hash_has_key | 949
+
+#### initialize_copy
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.17 | src/hash.c | mrb_hash_replace | 711
+
+#### inspect
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.30 | src/hash.c | mrb_hash_inspect | 831
+
+#### key?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.18 | src/hash.c | mrb_hash_has_key | 949
+
+#### keys
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.19 | src/hash.c | mrb_hash_keys | 868
+
+#### length
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.20 | src/hash.c | mrb_hash_size_m | 757
+
+#### member?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.21 | src/hash.c | mrb_hash_has_key | 949
+
+#### replace
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.23 | src/hash.c | mrb_hash_replace | 711
+
+#### shift
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.24 | src/hash.c | mrb_hash_shift | 547
+
+#### size
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.25 | src/hash.c | mrb_hash_size_m | 757
+
+#### store
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.26 | src/hash.c | mrb_hash_aset | 687
+
+#### to_hash
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.29 | src/hash.c | mrb_hash_to_hash | 849
+
+#### value?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.27 | src/hash.c | mrb_hash_has_value | 992
+
+#### values
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.13.4.28 | src/hash.c | mrb_hash_values | 899
+
+## Integer
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+15.2.8 |  n/a | src/numeric.c
+
+### Methods
+
+#### to_i
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.24 | src/numeric.c | int_to_i | 693
+
+#### to_int
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/numeric.c | int_to_i | 693
+
+## NilClass
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+n/a |  n/a | src/object.c
+
+### Methods
+
+#### &
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.4.3.1 | src/object.c | false_and | 201
+
+#### ^
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.4.3.2 | src/object.c | false_xor | 220
+
+#### inspect
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/object.c | nil_inspect | 89
+
+#### nil?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.4.3.4 | src/object.c | mrb_true | 69
+
+#### to_s
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.4.3.5 | src/object.c | nil_to_s | 83
+
+#### |
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.4.3.3 | src/object.c | false_or | 240
+
+## Numeric
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+15.2.7 |  Comparable | src/numeric.c
+
+### Methods
+
+#### **
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/numeric.c | num_pow | 86
+
+#### +@
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.7.4.1 | src/numeric.c | num_uplus | 52
+
+#### -@
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.7.4.2 | src/numeric.c | num_uminus | 65
+
+#### /
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.8.3.4 | src/numeric.c | num_div | 126
+
+#### <=>
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.9.3.6 | src/numeric.c | num_cmp | 1309
+
+#### abs
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.7.4.3 | src/numeric.c | num_abs | 147
+
+#### quo
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.7.4.5 | src/numeric.c | num_div | 126
+
+## Proc
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+15.2.17 |  n/a | src/proc.c
+
+### Methods
+
+#### arity
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/proc.c | mrb_proc_arity | 136
+
+#### initialize
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/proc.c | mrb_proc_initialize | 88
+
+#### initialize_copy
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/proc.c | mrb_proc_init_copy | 104
+
+## Range
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+15.2.14 |  Enumerable | src/range.c
+
+### Methods
+
+#### ==
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.14.4.1 | src/range.c | mrb_range_eq | 150
+
+#### ===
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.14.4.2 | src/range.c | mrb_range_include | 222
+
+#### begin
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.14.4.3 | src/range.c | mrb_range_beg | 57
+
+#### each
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.14.4.4 | src/range.c | mrb_range_each | 259
+
+#### end
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.14.4.5 | src/range.c | mrb_range_end | 76
+
+#### eql?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.14.4.14 | src/range.c | range_eql | 373
+
+#### exclude_end?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.14.4.6 | src/range.c | mrb_range_excl | 90
+
+#### first
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.14.4.7 | src/range.c | mrb_range_beg | 57
+
+#### include?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.14.4.8 | src/range.c | mrb_range_include | 222
+
+#### initialize
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.14.4.9 | src/range.c | mrb_range_initialize | 120
+
+#### initialize_copy
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.14.4.15 | src/range.c | range_initialize_copy | 398
+
+#### inspect
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.14.4.13 | src/range.c | range_inspect | 352
+
+#### last
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.14.4.10 | src/range.c | mrb_range_end | 76
+
+#### member?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.14.4.11 | src/range.c | mrb_range_include | 222
+
+#### to_s
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.14.4.12 | src/range.c | range_to_s | 304
+
+## RuntimeError
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+15.2.28 |  n/a | src/error.c
+
+## ScriptError
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+15.2.37 |  n/a | src/error.c
+
+## StandardError
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+15.2.23 |  n/a | src/error.c
+
+## String
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+15.2.10 |  Comparable | src/string.c
+
+### Methods
+
+#### *
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.1 | src/string.c | mrb_str_times | 480
+
+#### +
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.2 | src/string.c | mrb_str_plus_m | 433
+
+#### <=>
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.3 | src/string.c | mrb_str_cmp_m | 569
+
+#### ==
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.4 | src/string.c | mrb_str_equal_m | 636
+
+#### []
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.6 | src/string.c | mrb_str_aref_m | 855
+
+#### bytes
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/string.c | mrb_str_bytes | 2507
+
+#### bytesize
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/string.c | mrb_str_bytesize | 448
+
+#### capitalize
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.7 | src/string.c | mrb_str_capitalize | 921
+
+#### capitalize!
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.8 | src/string.c | mrb_str_capitalize_bang | 885
+
+#### chomp
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.9 | src/string.c | mrb_str_chomp | 1024
+
+#### chomp!
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.10 | src/string.c | mrb_str_chomp_bang | 939
+
+#### chop
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.11 | src/string.c | mrb_str_chop | 1082
+
+#### chop!
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.12 | src/string.c | mrb_str_chop_bang | 1043
+
+#### downcase
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.13 | src/string.c | mrb_str_downcase | 1132
+
+#### downcase!
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.14 | src/string.c | mrb_str_downcase_bang | 1099
+
+#### empty?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.16 | src/string.c | mrb_str_empty_p | 1152
+
+#### eql?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.17 | src/string.c | mrb_str_eql | 1167
+
+#### hash
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.20 | src/string.c | mrb_str_hash_m | 1253
+
+#### include?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.21 | src/string.c | mrb_str_include | 1273
+
+#### index
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.22 | src/string.c | mrb_str_index_m | 1315
+
+#### initialize
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.23 | src/string.c | mrb_str_init | 1441
+
+#### initialize_copy
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.24 | src/string.c | mrb_str_replace | 1425
+
+#### inspect
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.46 | src/string.c | mrb_str_inspect | 2445
+
+#### intern
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.25 | src/string.c | mrb_str_intern | 1473
+
+#### length
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.26 | src/string.c | mrb_str_size | 463
+
+#### replace
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.28 | src/string.c | mrb_str_replace | 1425
+
+#### reverse
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.29 | src/string.c | mrb_str_reverse | 1543
+
+#### reverse!
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.30 | src/string.c | mrb_str_reverse_bang | 1569
+
+#### rindex
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.31 | src/string.c | mrb_str_rindex_m | 1656
+
+#### size
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.33 | src/string.c | mrb_str_size | 463
+
+#### slice
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.34 | src/string.c | mrb_str_aref_m | 855
+
+#### split
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.35 | src/string.c | mrb_str_split_m | 1783
+
+#### to_f
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.39 | src/string.c | mrb_str_to_f | 2215
+
+#### to_i
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.38 | src/string.c | mrb_str_to_i | 2092
+
+#### to_s
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.40 | src/string.c | mrb_str_to_s | 2229
+
+#### to_str
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.40 | src/string.c | mrb_str_to_s | 2229
+
+#### to_sym
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.41 | src/string.c | mrb_str_intern | 1473
+
+#### upcase
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.42 | src/string.c | mrb_str_upcase | 2279
+
+#### upcase!
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.10.5.43 | src/string.c | mrb_str_upcase_bang | 2246
+
+## Symbol
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+15.2.11 |  n/a | src/symbol.c
+
+### Methods
+
+#### <=>
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/symbol.c | sym_cmp | 413
+
+#### ===
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.11.3.1 | src/symbol.c | sym_equal | 186
+
+#### id2name
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.11.3.2 | src/symbol.c | mrb_sym_to_s | 209
+
+#### inspect
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.11.3.5 | src/symbol.c | sym_inspect | 361
+
+#### to_s
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.11.3.3 | src/symbol.c | mrb_sym_to_s | 209
+
+#### to_sym
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.11.3.4 | src/symbol.c | sym_to_sym | 231
+
+## SyntaxError
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+15.2.38 |  n/a | src/error.c
+
+## TrueClass
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+n/a |  n/a | src/object.c
+
+### Methods
+
+#### &
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.5.3.1 | src/object.c | true_and | 113
+
+#### ^
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.5.3.2 | src/object.c | true_xor | 133
+
+#### inspect
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/object.c | true_to_s | 150
+
+#### to_s
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.5.3.3 | src/object.c | true_to_s | 150
+
+#### |
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.2.5.3.4 | src/object.c | true_or | 173
+
+# Core Modules
+
+## Comparable
+
+ISO Code | Source File
+--- | --- 
+15.3.3 | src/compar.c
+
+## Enumerable
+
+ISO Code | Source File
+--- | --- 
+15.3.2 | src/enum.c
+
+## GC
+
+ISO Code | Source File
+--- | --- 
+n/a | src/gc.c
+
+### Class Methods
+
+#### disable
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/gc.c | gc_disable | 1131
+
+#### enable
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/gc.c | gc_enable | 1109
+
+#### generational_mode
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/gc.c | gc_generational_mode_get | 1231
+
+#### generational_mode=
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/gc.c | gc_generational_mode_set | 1245
+
+#### interval_ratio
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/gc.c | gc_interval_ratio_get | 1149
+
+#### interval_ratio=
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/gc.c | gc_interval_ratio_set | 1164
+
+#### start
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/gc.c | gc_start | 1089
+
+#### step_ratio
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/gc.c | gc_step_ratio_get | 1182
+
+#### step_ratio=
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/gc.c | gc_step_ratio_set | 1197
+
+#### test
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/gc.c | gc_test | 1553
+
+## Kernel
+
+ISO Code | Source File
+--- | --- 
+15.3.1 | src/kernel.c
+
+### Class Methods
+
+#### block_given?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.2.2 | src/kernel.c | mrb_f_block_given_p_m | 215
+
+#### global_variables
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.2.4 | src/kernel.c | mrb_f_global_variables | 1056
+
+#### iterator?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.2.5 | src/kernel.c | mrb_f_block_given_p_m | 215
+
+#### raise
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.2.12 | src/kernel.c | mrb_f_raise | 905
+
+### Methods
+
+#### !=
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/kernel.c | mrb_obj_not_equal_m | 105
+
+#### ==
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.1 | src/kernel.c | mrb_obj_equal_m | 93
+
+#### ===
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.2 | src/kernel.c | mrb_equal_m | 126
+
+#### __id__
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.3 | src/kernel.c | mrb_obj_id_m | 155
+
+#### __send__
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.4 | src/kernel.c | mrb_f_send | 180
+
+#### block_given?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.6 | src/kernel.c | mrb_f_block_given_p_m | 215
+
+#### class
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.7 | src/kernel.c | mrb_obj_class_m | 256
+
+#### clone
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.8 | src/kernel.c | mrb_obj_clone | 342
+
+#### dup
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.9 | src/kernel.c | mrb_obj_dup | 378
+
+#### eql?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.10 | src/kernel.c | mrb_obj_equal_m | 93
+
+#### equal?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.11 | src/kernel.c | mrb_obj_equal_m | 93
+
+#### extend
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.13 | src/kernel.c | mrb_obj_extend_m | 437
+
+#### global_variables
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.14 | src/kernel.c | mrb_f_global_variables | 1056
+
+#### hash
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.15 | src/kernel.c | mrb_obj_hash | 458
+
+#### initialize_copy
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.16 | src/kernel.c | mrb_obj_init_copy | 465
+
+#### inspect
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.17 | src/kernel.c | mrb_obj_inspect | 53
+
+#### instance_eval
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.18 | src/kernel.c | mrb_obj_instance_eval | 501
+
+#### instance_of?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.19 | src/kernel.c | obj_is_instance_of | 540
+
+#### instance_variable_defined?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.20 | src/kernel.c | mrb_obj_ivar_defined | 607
+
+#### instance_variable_get
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.21 | src/kernel.c | mrb_obj_ivar_get | 641
+
+#### instance_variable_set
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.22 | src/kernel.c | mrb_obj_ivar_set | 673
+
+#### instance_variables
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.23 | src/kernel.c | mrb_obj_instance_variables | 666
+
+#### is_a?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.24 | src/kernel.c | mrb_obj_is_kind_of_m | 713
+
+#### iterator?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.25 | src/kernel.c | mrb_f_block_given_p_m | 215
+
+#### kind_of?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.26 | src/kernel.c | mrb_obj_is_kind_of_m | 713
+
+#### methods
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.31 | src/kernel.c | mrb_obj_methods_m | 811
+
+#### nil?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.32 | src/kernel.c | mrb_false | 827
+
+#### object_id
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.33 | src/kernel.c | mrb_obj_id_m | 155
+
+#### private_methods
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.36 | src/kernel.c | mrb_obj_private_methods | 842
+
+#### protected_methods
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.37 | src/kernel.c | mrb_obj_protected_methods | 859
+
+#### public_methods
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.38 | src/kernel.c | mrb_obj_public_methods | 876
+
+#### raise
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.40 | src/kernel.c | mrb_f_raise | 905
+
+#### remove_instance_variable
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.41 | src/kernel.c | mrb_obj_remove_instance_variable | 955
+
+#### respond_to?
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.43 | src/kernel.c | obj_respond_to | 991
+
+#### send
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.44 | src/kernel.c | mrb_f_send | 180
+
+#### singleton_class
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+n/a | src/kernel.c | mrb_singleton_class | 919
+
+#### singleton_methods
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.45 | src/kernel.c | mrb_obj_singleton_methods_m | 1072
+
+#### to_s
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+15.3.1.3.46 | src/kernel.c | mrb_any_to_s | 431
+
diff --git a/doc/language/README.md b/doc/language/README.md
new file mode 100644
index 000000000..67946fe64
--- /dev/null
+++ b/doc/language/README.md
@@ -0,0 +1,9 @@
+# Language
+
+mruby is an implementation of the Ruby programming language.
+These documents are describing the language features and libraries
+which are provided together with mruby.
+
+## Built-In Class and Modules
+
+see *doc/lang/Core.md*
diff --git a/doc/language/generator.rb b/doc/language/generator.rb
new file mode 100755
index 000000000..9bc907ece
--- /dev/null
+++ b/doc/language/generator.rb
@@ -0,0 +1,7 @@
+#!/usr/bin/env ruby
+
+c_dir = File.dirname(__FILE__)
+MRUBY_ROOT = File.expand_path("#{c_dir}/../..")
+DOC_DIR = File.expand_path(c_dir)
+
+puts `#{DOC_DIR}/mrbdoc/mrbdoc.rb #{MRUBY_ROOT} #{DOC_DIR}`
diff --git a/doc/language/mrbdoc/lib/mrbdoc_analyze.rb b/doc/language/mrbdoc/lib/mrbdoc_analyze.rb
new file mode 100644
index 000000000..94f368c08
--- /dev/null
+++ b/doc/language/mrbdoc/lib/mrbdoc_analyze.rb
@@ -0,0 +1,231 @@
+class MRBDoc
+  SRC_DIR = 'src'
+  MRBLIB_DIR = 'mrblib'
+
+  def analyze_code dir, &block
+    @mrb_files = {}
+    @dir = File.expand_path(dir)
+
+    block.call "MRBDOC\tanalyze #{@dir}"
+
+    analyze(dir) do |progress|
+      block.call progress
+    end
+  end
+
+  def each_file(&block); @mrb_files.each {|k,v| block.call k,v}; end
+
+  def find_c_func(c_func_name)
+    each_file do |file_name, file|
+      c_func = file.c_funcs(c_func_name)
+      return c_func unless c_func.nil?
+    end
+    {}
+  end
+
+  def find_c_file(rb_obj_name, c_func_name)
+    last_file_name_match = ''
+    each_file do |file_name, file|
+      c_func = file.c_funcs(c_func_name)
+      if c_func and file.rb_class(rb_obj_name) or file.rb_module(rb_obj_name)
+        return file_name
+      elsif c_func
+        last_file_name_match = file_name
+      end
+    end
+    last_file_name_match
+  end
+
+  def find_c_file_by_class(name)
+    each_file do |file_name, file|
+      rb_class = file.rb_class(name)
+      return file_name unless rb_class.nil?
+    end
+    'nil'
+  end
+
+  def find_c_file_by_module(name)
+    each_file do |file_name, file|
+      rb_module = file.rb_module(name)
+      return file_name unless rb_module.nil?
+    end
+    'nil'
+  end
+
+  private
+
+  def analyze dir, &block
+    collect_all_files dir, &block
+  end
+
+  def collect_all_files dir, &block
+    l = lambda {|f| block.call "  - #{f.name}"}
+    collect_files(src_code_dir(dir), /\.c$/, &l)
+    collect_files(mrb_code_dir(dir), /\.rb$/, &l)
+  end
+
+  def collect_files dir, rxp, &block
+    Dir.foreach(dir) do |file|
+      next unless file =~ rxp
+
+      file_path = "#{dir}/#{file}"
+      mrb_file = MRBFile.new "#{file_path}"
+      @mrb_files["#{file_path}"] = mrb_file
+
+      block.call mrb_file
+    end
+  end
+
+  def src_code_dir dir; File.expand_path SRC_DIR, dir; end
+  def mrb_code_dir dir; File.expand_path MRBLIB_DIR, dir; end
+end
+
+class MRBFile
+  attr_reader :name
+  attr_reader :file
+
+  def initialize mrb_file
+    @file = mrb_file
+    @name = File.basename file
+    @c_funcs = {}
+    @rb_class_c_def = {}
+    @rb_method_c_def = {}
+    @rb_class_method_c_def = {}
+    @rb_module_c_def = {}
+    @last_line = nil
+    @assignments = {}
+
+    @assignments['mrb->object_class'] = 'Object'
+    @assignments['mrb->kernel_module'] = 'Kernel'
+    @assignments['mrb->module_class'] = 'Module'
+    @assignments['mrb->nil_class'] = 'NilClass'
+    @assignments['mrb->true_class'] = 'TrueClass'
+    @assignments['mrb->class_class'] = 'Class'
+
+    analyze
+  end
+
+  def each_class &block
+    @rb_class_c_def.each do |class_name, class_hsh|
+      block.call class_name, class_hsh
+    end
+  end
+
+  def each_method name, &block
+    @rb_method_c_def.each do |met_name, met_hsh|
+      met_name_tmp = met_name.sub /^#{name}_/, ''
+      block.call met_name_tmp, met_hsh if met_hsh[:rb_class] == name
+    end
+  end
+
+  def each_class_method name, &block
+    @rb_class_method_c_def.each do |met_name, met_hsh|
+      met_name_tmp = met_name.sub /^#{name}_/, ''
+      block.call met_name_tmp, met_hsh if met_hsh[:rb_class] == name
+    end
+  end
+
+  def each_module &block
+    @rb_module_c_def.each do |module_name, module_hsh|
+      block.call module_name, module_hsh
+    end
+  end
+
+  def each_core_object &block
+    each_class {|n| block.call n}
+    each_module {|n| block.call n}
+  end
+
+  def c_funcs c_func_name; @c_funcs[c_func_name]; end
+  def rb_class rb_class_name; @rb_class_c_def[rb_class_name]; end
+  def rb_module rb_module_name; @rb_module_c_def[rb_module_name]; end
+
+  private
+
+  def analyze
+    File.open(file).each_line.each_with_index do |line, idx|
+      line_no = idx.succ
+      if c_file?
+        analyze_c_line line, line_no
+      elsif rb_file?
+        analyze_rb_line line, line_no
+      else
+        raise ArgumentError.new "#{file} is a not supported file type"
+      end
+      @last_line = line.strip
+    end
+  end
+
+  def c_file?; (name =~ /\.c$/); end
+  def rb_file?; (name =~ /\.rb$/); end
+
+  RXP_C_VAR = /\s*([^\s]*?)\s*?/
+  RXP_C_STR = /\s*?\"(.*?)\"\s*?/
+  #RXP_C_ISO = /\s*\;\s*[\/\*]*\s*.*?([15\.]{0,3}[0-9\.]*)\s*[\\\\\*]*/
+  RXP_C_ISO = /\s*;\s*[\/\*]*[\sa-zA-Z]*([\d\.]*)[\sa-zA-Z]*[\*\/]*/
+
+  def analyze_c_line line, line_no
+    case line.strip
+    when /^([a-zA-Z\_][a-zA-Z\_0-9]*?)\((.*?)\)\s*?$/
+      # assuming c method definition
+      @c_funcs[$1] = {:line_no => line_no, :args => $2, :return => @last_line}
+    when /mrb_define_class\(.*?\,#{RXP_C_STR}\,#{RXP_C_VAR}\)#{RXP_C_ISO}/
+      # assuming ruby class definition in c
+      class_name = $1.clone
+      iso = $3.clone
+      iso.strip!
+      @rb_class_c_def[class_name] = {:c_object => $2, :iso => iso}
+      assigns = line.split '='
+      if assigns.size > 1
+        assigns[0..-2].each do |v|
+          @assignments[v.strip] = class_name
+        end
+      end
+    when /mrb_define_module\(.*?\,#{RXP_C_STR}\)#{RXP_C_ISO}/
+      # assuming ruby class definition in c
+      module_name = $1.clone
+      iso = $2.clone
+      iso.strip!
+      @rb_module_c_def[module_name] = {:iso => iso}
+      assigns = line.split '='
+      if assigns.size > 1
+        assigns[0..-2].each do |v|
+          @assignments[v.strip] = module_name
+        end
+      end
+    when /mrb_define_method\(.*?\,#{RXP_C_VAR}\,#{RXP_C_STR}\,#{RXP_C_VAR}\,#{RXP_C_VAR}\)#{RXP_C_ISO}/
+      # assuming ruby method definition in c
+      name = $1.clone
+      name = resolve_obj(name)
+      iso = $5.clone
+      iso.strip!
+      @rb_method_c_def["#{name}_#{$2}"] = {:c_func => $3, :args => $4, :rb_class => name, :iso => iso}
+    when /mrb_define_class_method\(.*?\,#{RXP_C_VAR}\,#{RXP_C_STR}\,#{RXP_C_VAR}\,#{RXP_C_VAR}\)#{RXP_C_ISO}/
+      # assuming ruby class method definition in c
+      class_name = $1.clone
+      class_name = resolve_obj(class_name)
+      iso = $5.clone
+      iso.strip!
+      @rb_class_method_c_def["#{class_name}_#{$2}"] = {:c_func => $3, :args => $4, :rb_class => class_name, :iso => iso}
+    when /mrb_name_class\(.*?\,#{RXP_C_VAR}\,\s*mrb_intern\(.*?,#{RXP_C_STR}\)\)#{RXP_C_ISO}/
+      class_name = $2.clone
+      iso = $3.clone
+      iso.strip!
+      @rb_class_c_def[class_name] = {:c_object => $1, :iso => iso}
+      @assignments[$1] = class_name
+    when /mrb_include_module\(.*?\,#{RXP_C_VAR}\,\s*mrb_class_get\(.*?\,#{RXP_C_STR}\)\)/
+      class_name = resolve_obj($1)
+      mod = $2.clone
+      @rb_class_c_def[class_name][:include] = [] unless @rb_class_c_def[class_name].has_key? :include
+      @rb_class_c_def[class_name][:include] << mod
+    end
+  end
+
+  def analyze_rb_line line, line_no
+
+  end
+
+  def resolve_obj c_var
+    @assignments[c_var]
+  end
+end
diff --git a/doc/language/mrbdoc/lib/mrbdoc_docu.rb b/doc/language/mrbdoc/lib/mrbdoc_docu.rb
new file mode 100644
index 000000000..116228927
--- /dev/null
+++ b/doc/language/mrbdoc/lib/mrbdoc_docu.rb
@@ -0,0 +1,113 @@
+class MRBDoc
+  def write_documentation dir, &block
+    block.call "MRBDOC\twrite to #{File.expand_path(dir)}"
+
+    write(dir) do |progress|
+      block.call progress
+    end
+  end
+
+  private
+
+  def write dir
+    File.open(File.expand_path('Core.md', dir), 'w+') do |io|
+      print_core_classes(io)
+      print_core_modules(io)
+    end
+  end
+
+  def get_core_list id
+    core_list = {}
+    each_file do |file_path, mrb_file|
+      mrb_file.send(id) do |name, cls_hsh|
+        core_list[name] = {:data => cls_hsh, :methods => {}, :class_methods => {}}
+        mrb_file.each_method name do |met_name, met_hsh|
+          core_list[name][:methods][met_name] = met_hsh
+        end
+        mrb_file.each_class_method name do |met_name, met_hsh|
+          core_list[name][:class_methods][met_name] = met_hsh
+        end
+      end
+    end
+    core_list
+  end
+
+  def print_core_classes(io)
+    core_list = get_core_list :each_class
+    io.puts "# Core Classes\n\n"
+    core_list.sort.each do |name, hsh|
+      file = find_c_file_by_class(name)
+      file = file.split("#{@dir}/")[1]
+      iso = hsh[:data][:iso]
+      iso = 'n/a' if iso.nil? or iso == ''
+      mixins = hsh[:data][:include].join(', ') unless hsh[:data][:include].nil?
+      mixins = 'n/a' if mixins.nil? or mixins == ''
+
+      io.puts <<CLASS
+## #{name}
+
+ISO Code | Mixins | Source File
+--- | --- | ---
+#{iso} |  #{mixins} | #{file}
+
+CLASS
+      print_class_methods(io, hsh)
+      print_methods(io, hsh)
+    end
+  end
+
+  def print_core_modules(io)
+    core_list = get_core_list :each_module
+    io.puts "# Core Modules\n\n"
+    core_list.sort.each do |name, hsh|
+      file = find_c_file_by_module(name)
+      file = file.split("#{@dir}/")[1]
+      iso = hsh[:data][:iso]
+      iso = 'n/a' if iso.nil? or iso == ''
+
+      io.puts <<CLASS
+## #{name}
+
+ISO Code | Source File
+--- | --- 
+#{iso} | #{file}
+
+CLASS
+      print_class_methods(io, hsh)
+      print_methods(io, hsh)
+    end
+  end
+
+  def print_methods(io, hsh)
+    return unless hsh[:methods].size > 0
+    io.puts "### Methods\n\n"
+    hsh[:methods].sort.each do |met_name, met_hsh|
+      print_method(io, met_name, met_hsh)
+    end
+  end
+
+  def print_class_methods(io, hsh)
+    return unless hsh[:class_methods].size > 0
+    io.puts "### Class Methods\n\n"
+    hsh[:class_methods].sort.each do |met_name, met_hsh|
+      print_method(io, met_name, met_hsh)
+    end
+  end
+
+  def print_method(io, met_name, met_hsh)
+    line_no = find_c_func(met_hsh[:c_func])[:line_no]
+    file = find_c_file(met_hsh[:rb_class], met_hsh[:c_func])
+    file = file.split("#{@dir}/")[1]
+    iso = met_hsh[:iso]
+    iso = 'n/a' if iso.nil? or iso == ''
+
+    io.puts <<METHOD
+#### #{met_name}
+
+ISO Code | Source File | C Function | Line
+--- | --- | ---
+#{iso} | #{file} | #{met_hsh[:c_func]} | #{line_no}
+
+METHOD
+  end
+end
diff --git a/doc/language/mrbdoc/mrbdoc.rb b/doc/language/mrbdoc/mrbdoc.rb
new file mode 100755
index 000000000..cd8ae3833
--- /dev/null
+++ b/doc/language/mrbdoc/mrbdoc.rb
@@ -0,0 +1,22 @@
+#!/usr/bin/env ruby
+
+$: << File.dirname(__FILE__) + '/lib'
+
+require 'mrbdoc_analyze'
+require 'mrbdoc_docu'
+
+MRUBY_ROOT = ARGV[0]
+DOC_ROOT = ARGV[1]
+
+raise ArgumentError.new 'mruby root missing!' if MRUBY_ROOT.nil?
+raise ArgumentError.new 'doc root missing!' if DOC_ROOT.nil?
+
+mrbdoc = MRBDoc.new
+
+mrbdoc.analyze_code MRUBY_ROOT do |progress|
+  puts progress
+end
+
+mrbdoc.write_documentation DOC_ROOT do |progress|
+  puts progress
+end