[flang] First implementation of a parse tree visitor

Original-commit: flang-compiler/f18@0b441831f455b9458a943090d7e9ed334aaf159c
Reviewed-on: https://github.com/flang-compiler/f18/pull/15
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#13 from ThePortlandGroup/sch1

Add simple recursive CMake directory structure

Original-commit: flang-compiler/f18@c20c4a34ffcdae6aa6575a64c9f1a83b906e35e0
Reviewed-on: https://github.com/flang-compiler/f18/pull/13

[flang] Add missing include config file skeleton

Original-commit: flang-compiler/f18@beb71e4e4bb75e04a60813cc2318b842c05e5613
Reviewed-on: https://github.com/flang-compiler/f18/pull/13

[flang] Add simple recursive CMake directory structure

Original-commit: flang-compiler/f18@a021b2ca768c2b8c03d626739d0754ba99e463d2
Reviewed-on: https://github.com/flang-compiler/f18/pull/13
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#14 from ThePortlandGroup/pmk-msg

Put localization markers on the string literals used for messages.

Original-commit: flang-compiler/f18@93089c2bc6063674add0ec1567acd7676a5a1f95
Reviewed-on: https://github.com/flang-compiler/f18/pull/14

[flang] Support localizable formatted messages.

Original-commit: flang-compiler/f18@e974321494b4fcecdb9bd0a5f82f0624c1a33696
Reviewed-on: https://github.com/flang-compiler/f18/pull/14

[flang] Fix bug with "expected ..." messages in token strings.

Original-commit: flang-compiler/f18@9cc84ba6fbbaed94481ec7781e124a7f4881a7b2
Reviewed-on: https://github.com/flang-compiler/f18/pull/14
Tree-same-pre-rewrite: false

[flang] Use "..."_en_US for messages.

Original-commit: flang-compiler/f18@fffa8815762a7fa449863a6fa0f7c4b72bd0d4e4
Reviewed-on: https://github.com/flang-compiler/f18/pull/14
Tree-same-pre-rewrite: false

[flang] Convert all messages to MessageTexts ("..."_msg).

Original-commit: flang-compiler/f18@33357f3657a6fea91af8cf8b5fd30b4be9efcdd0
Reviewed-on: https://github.com/flang-compiler/f18/pull/14
Tree-same-pre-rewrite: false

[flang] Define MessageText and "..."_msg.

Original-commit: flang-compiler/f18@6e9e16431c3de9b48bfa50dc489f7ddf73d783e4
Reviewed-on: https://github.com/flang-compiler/f18/pull/14
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#12 from ThePortlandGroup/pmk1

Update the header file guards in lib/parser to reflect the introducti…

Original-commit: flang-compiler/f18@5ad8f67f4ac7eccd424138e3a1591217b07f7930
Reviewed-on: https://github.com/flang-compiler/f18/pull/12

[flang] Update the header file guards in lib/parser to reflect the introduction of the parser namespace.

Original-commit: flang-compiler/f18@a11bb88396d6d074e0b55cf5ec19b0ddfb52a8fc
Reviewed-on: https://github.com/flang-compiler/f18/pull/12

[flang] Merge pull request flang-compiler/f18#11 from ThePortlandGroup/pmk1

Remove old character "cooking" parser combinators

Original-commit: flang-compiler/f18@def973c39c613ad1f26a1ef2de49fdbd7c3d4934
Reviewed-on: https://github.com/flang-compiler/f18/pull/11

[flang] Reformatting and some comment clean-up.

Original-commit: flang-compiler/f18@cedd3d82cf5aef7ba2bddfa4e13f13efac5600a7
Reviewed-on: https://github.com/flang-compiler/f18/pull/11

[flang] Remove old character "cooking" parser combinators that handled Fortran
comments, continuations, &c. that have become obsolete with the use
of the new C++-coded prescanner module.  Clean out members from
ParseState that were used only by cookedNextChar and its sub-parsers.

Original-commit: flang-compiler/f18@41717531e5eb17dc4f090babbeb63745397d80cc
Reviewed-on: https://github.com/flang-compiler/f18/pull/11
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#10 from ThePortlandGroup/pmk2

Remove a temporary #include <iostream> and auto-detect -Mfixed

Original-commit: flang-compiler/f18@93ecf8d908eafc65da3f0e3d1da00f119d12a86b
Reviewed-on: https://github.com/flang-compiler/f18/pull/10

[flang] Remove a temporary #include <iostream> and auto-detect -Mfixed from a .f suffix.

Original-commit: flang-compiler/f18@962c7ed0ef01a9904e7ccf0d2850b38d0c6bb46e
Reviewed-on: https://github.com/flang-compiler/f18/pull/10

[flang] Merge pull request flang-compiler/f18#9 from ThePortlandGroup/pmk1

Implement source provenance tracking and file inclusion.

Original-commit: flang-compiler/f18@1eb7d6028c7bd1dea1b51e0ab097544627d722e7
Reviewed-on: https://github.com/flang-compiler/f18/pull/9

[flang] Fix a couple bugs noticed while resolving merge.

Original-commit: flang-compiler/f18@dbb32c60a6f9789d2a341959672fd4244a413d1d
Reviewed-on: https://github.com/flang-compiler/f18/pull/9

[flang] Complete merge of provenance feature.

Original-commit: flang-compiler/f18@646f68be61b1bf0f653cc332a51374df71f0ed0b
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Markdown tweaks in documentation.

Original-commit: flang-compiler/f18@044148ead21f18e16716d5bc30819525c79065d0
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Spruce up formatting of error message output.

Original-commit: flang-compiler/f18@0750985bdf99e22bdbfbf3da793bd62f7c996425
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Complete provenance tracking through macro calls.

Original-commit: flang-compiler/f18@8c05a6543b647299104ae07a6a248b67f13ee24e
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] More precise source locations on error messages.  Anticipate module file scanning.

Original-commit: flang-compiler/f18@f4faadd3897fa90f705c50e432e1e7c7343f90cd
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Remove #includes that were used for debugging.

Original-commit: flang-compiler/f18@828ee8c2f0133515d260700e36590b83eaae57fc
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Support #include directive.

Original-commit: flang-compiler/f18@909622d9b77f8b70188d977f768b784433f8a820
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Implement a directory search path for INCLUDE lines.

Original-commit: flang-compiler/f18@62129e56008acc02c894c3cf2b936f76dbfa0060
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Implement Fortran INCLUDE lines.

Original-commit: flang-compiler/f18@d01af8950628b51baee28b5c9b8052b09f2b0dbf
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Minor refactoring: extract TokenSequence into its own module.

Original-commit: flang-compiler/f18@1b17b4a069d837f649192f0a6500e1c7ad76fad1
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Preparatory work for file inclusion.

Original-commit: flang-compiler/f18@1cbbd4a3574c97de0157007234108012c87fbd3f
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Adjust CHECK() so that first token of program can begin with first character.

Original-commit: flang-compiler/f18@2b77e466ffaf3620638e166116a39d0f5bf09224
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Fix fixed form scanning, get tests passing again.

Original-commit: flang-compiler/f18@2c8ff18e988143f81b0e3216386caabc1a6feeb4
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Forge provenances for compiler-inserted text.

Original-commit: flang-compiler/f18@dbdd01aa258557d45816d1a1e0588553c16bef6a
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Fix macro definitions (broken by provenances earlier).

Original-commit: flang-compiler/f18@3ed548b477e50f3a803b5e6fad05069351c37612
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Restructure inter-class references for clarity.

Original-commit: flang-compiler/f18@1836cd5d06e8cc0cc46fb9c954e9237337c0f5d3
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Fix column tracking in fixed form.

Original-commit: flang-compiler/f18@8c9a1013fa0861496e22cafde5d3c5326fae9a3a
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Debugging new provenance support.

Original-commit: flang-compiler/f18@1233f666da21d88fb84968c1e46cddf45557d0a1
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Replace Position with Provenance everywhere.

Original-commit: flang-compiler/f18@8c2da3f8cc687012756a85567553500fac64c824
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Development of character provenance.

Original-commit: flang-compiler/f18@88c532958006ad064cab88d2405055a456b07dcf
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Begin work on character provenances.

Original-commit: flang-compiler/f18@ea3c05af5a43396aad8e68fef1f068026a2d40e7
Reviewed-on: https://github.com/flang-compiler/f18/pull/9
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#8 from ThePortlandGroup/tsk1

More work on types

Original-commit: flang-compiler/f18@f330b03fc206a1bc39cd46bf102db14a9f4d8b2a
Reviewed-on: https://github.com/flang-compiler/f18/pull/8

[flang] Rename methods with uppercase names.

Original-commit: flang-compiler/f18@00fec54e5af1b88c4844cbc1b7cc3243a3d34dbf
Reviewed-on: https://github.com/flang-compiler/f18/pull/8

[flang] Add test-type.cc to build types from parse tree.

Original-commit: flang-compiler/f18@47101317fbe56c6ea9b947c6d0eef913abd310e1
Reviewed-on: https://github.com/flang-compiler/f18/pull/8
Tree-same-pre-rewrite: false

[flang] Continue adding to type.h

New classes: Bound, DeclTypeSpec, ShapeSpec, ComponentArraySpec,
DataComponentDef, ProcDecl, ProcComponentDef, DerivedTypedef

Original-commit: flang-compiler/f18@a09d1e8c81145a0dc92a8e26c0ca5a6a622309fd
Reviewed-on: https://github.com/flang-compiler/f18/pull/8
Tree-same-pre-rewrite: false

[flang] Add Attrs class to represent set of Attr

Original-commit: flang-compiler/f18@8bb1f0eb9bee7c3de262eb82a9395127fd22db46
Reviewed-on: https://github.com/flang-compiler/f18/pull/8
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#7 from ThePortlandGroup/revert-6-schauveau_cmake

Revert "Schauveau cmake"

Original-commit: flang-compiler/f18@f786d7c85884d5aaadf2cff59b9b08c75592d578
Reviewed-on: https://github.com/flang-compiler/f18/pull/7

[flang] Revert "Schauveau cmake"

Original-commit: flang-compiler/f18@be33dc182a9bcfa664095886ca62b3b1db4eb797
Reviewed-on: https://github.com/flang-compiler/f18/pull/7

[flang] Merge pull request flang-compiler/f18#6 from ThePortlandGroup/schauveau_cmake

Merging since nobody appear to have any issues

Original-commit: flang-compiler/f18@913597e53a1d2efd1ed364eedf6977e43cf07596
Reviewed-on: https://github.com/flang-compiler/f18/pull/6

[flang] Fix incorrect clang/ directory name in include

Original-commit: flang-compiler/f18@ff61e3228a26dbd6e2661fc45d145f4e90d83e3d
Reviewed-on: https://github.com/flang-compiler/f18/pull/6

[flang] Simplified git clone in README

Original-commit: flang-compiler/f18@198d2e6c8a8a0ffee461acc76f7d1a252ad366da
Reviewed-on: https://github.com/flang-compiler/f18/pull/6
Tree-same-pre-rewrite: false

[flang] fix bad indentation in README

Original-commit: flang-compiler/f18@60a0123f46b74d3fad942bf359ebe5ba11da5cdd
Reviewed-on: https://github.com/flang-compiler/f18/pull/6
Tree-same-pre-rewrite: false

[flang] minor changres

Original-commit: flang-compiler/f18@1d351d2114be216472b89ff2f4a07ceceddddb8d
Reviewed-on: https://github.com/flang-compiler/f18/pull/6
Tree-same-pre-rewrite: false

[flang] updated build instructions in README.md

Original-commit: flang-compiler/f18@0fea8bd042469738ab08bdc95fc46b24c6fac3ad
Reviewed-on: https://github.com/flang-compiler/f18/pull/6
Tree-same-pre-rewrite: false

[flang] add preliminary README file

Original-commit: flang-compiler/f18@1fc60916fbc3339056fe889e8ac50a2906387c49
Reviewed-on: https://github.com/flang-compiler/f18/pull/6
Tree-same-pre-rewrite: false

[flang] after clang-format

Original-commit: flang-compiler/f18@7e464a7c3315b9dfc6db2861145d7e3455652548
Reviewed-on: https://github.com/flang-compiler/f18/pull/6
Tree-same-pre-rewrite: false

[flang] Add new global CMakefile infrastructure with examples

Original-commit: flang-compiler/f18@81b91f327052cd0596e96af9c33b2d0e221d10f5
Reviewed-on: https://github.com/flang-compiler/f18/pull/6
Tree-same-pre-rewrite: false

[flang] Clean up Makefile, add reformat target.

Now the only targets in Makefile are Debug, Release, and reformat.
"make reformat" reformats all C++ source in place.

Also includes the result of "make reformat". Most of the changes were
just moving the "main" include up.

Original-commit: flang-compiler/f18@cf7d3a7afb650b5fc952894136dd18e5551ac578

[flang] Merge pull request flang-compiler/f18#5 from ThePortlandGroup/tsk1

Move type.{h,cc} and attr.{h,cc}

Original-commit: flang-compiler/f18@612918f261cd131b307e37e9c913c6b11d007079
Reviewed-on: https://github.com/flang-compiler/f18/pull/5

[flang] Move type.{h,cc} and attr.{h,cc}

The are now in new namespace and directory, "semantics", similar to
"parser".

Original-commit: flang-compiler/f18@115a1341e2f072e19a3a37da85e9f7f91e42c2be
Reviewed-on: https://github.com/flang-compiler/f18/pull/5

[flang] Merge pull request flang-compiler/f18#3 from tskeith/type

Initial work on the representation of types.

Original-commit: flang-compiler/f18@7f2bbe3f48eac010b93acdce5c6e7bf0a86308dc
Reviewed-on: https://github.com/flang-compiler/f18/pull/3

[flang] Adapt to new directory for idioms.cc, idioms.h.

Change idioms.h so that calls to die will work outside the parser
namespace.

Use unordered_map to cache IntConst values.

Original-commit: flang-compiler/f18@9d06c385d9f2d9598f8e882d3badc9544c3567b9
Reviewed-on: https://github.com/flang-compiler/f18/pull/3

[flang] Address some of the review comments.

Original-commit: flang-compiler/f18@ecdffa374590f5d36c9c3ab22d6108c1c128e596
Reviewed-on: https://github.com/flang-compiler/f18/pull/3
Tree-same-pre-rewrite: false

[flang] Initial work on the representation of types.

Still work to do for derived types components, array specs, type-bound
procedures, etc.

Added executable type-test to the cmake file which exercises some of the
basic functionality. Modified the Makefile so that "make Debug" does a
cmake build.

Original-commit: flang-compiler/f18@02e8c4c867685959f8623ca8a4c2277756ecbe6c
Reviewed-on: https://github.com/flang-compiler/f18/pull/3
Tree-same-pre-rewrite: false

[flang] Merge pull request flang-compiler/f18#4 from ThePortlandGroup/directories

Impose a directory structure and intermediate namespace.

Original-commit: flang-compiler/f18@34fc2397aa8fa21510e8b477983c09c8499b4235
Reviewed-on: https://github.com/flang-compiler/f18/pull/4

[flang] Tweaked .clang-format, then ran it.

Original-commit: flang-compiler/f18@e10e43b6914e91414e4f8253c249c61df4a5ac32
Reviewed-on: https://github.com/flang-compiler/f18/pull/4

[flang] Impose a directory structure.  Move files around.  Introduce
an intermediate "parser" namespace.

Original-commit: flang-compiler/f18@690b6f0d1e92bdc694196f7857ffb0aa213f2edf
Reviewed-on: https://github.com/flang-compiler/f18/pull/4
Tree-same-pre-rewrite: false

[flang] Markdown improvements.

Original-commit: flang-compiler/f18@f40b5e40df72542153552442fd6800fe6449236f

[flang] Convert parser combinator documentation file to Markdown.

Original-commit: flang-compiler/f18@263865c97a4214ec69bed95cf362df6bfa4c1e09

[flang] Alphabetize and remove settings that match LLVM defaults.

Original-commit: flang-compiler/f18@82b1803f76a0053042a736f508e56c8e62817d4d

[flang] Rename c++style.md -> C++style.md.

Original-commit: flang-compiler/f18@4bde27deaed74b90b5907349052b6650b3cae360

[flang] More Markdown fixes.

Original-commit: flang-compiler/f18@8e77ed1f0ceeeeead3be7a62b79aaebd355978fc

[flang] More Markdown fixes.

Original-commit: flang-compiler/f18@7097566fa5451901bd2d945ea30e0f82e98ec4ae

[flang] More Markdown fixes.

Original-commit: flang-compiler/f18@7f7b1deb31d6adcb95906f5923cf081628423e79

[flang] More Markdown fixes.

Original-commit: flang-compiler/f18@89bdd4bf07a5bfecc56d762c4163e1f87509ce5e

[flang] Fix Markdown usage.

Original-commit: flang-compiler/f18@ee9e67964c16db55e1711a165720249ed1af7a66

[flang] Convert c++style.txt to c++style.md.

Original-commit: flang-compiler/f18@6b846b3c55ad2a044934406832ba55fae737dc8e

[flang] Fix #else after triggered #elif.

Original-commit: flang-compiler/f18@77db3281ecca5ee211fd4e0926bbfddc804ff63c

[flang] Update .clang-format, then reformat all C++ files.

Original-commit: flang-compiler/f18@0ec44de4b7f97574f69d943aaa5a2318ee8f2636

[flang] Adjust indentation on public:/private: labels in class definitions.

Original-commit: flang-compiler/f18@8c0e5a52a90eaacc5fae2fe9523065e42d51c491

[flang] Variadic macros, __VA_ARG__ and __VA_OPT__, and use
"default: CRASH_NO_CASE;" in place of prior macro.

Original-commit: flang-compiler/f18@21088961554347d28e88e14f9c82eeb0987867af

[flang] Merge branch 'master' of https://github.com/ThePortlandGroup/f18

Original-commit: flang-compiler/f18@be3e2baa39fbd030b43a0b307674ff5aff81a12f

[flang] Add .clang-format and "make formatted" rule.

Original-commit: flang-compiler/f18@5ef28a6112698b8d99b1922ca708e19ae6327176

[flang] C++ usage and style guide summary.

Original-commit: flang-compiler/f18@2cf1be7b0500faea2266fd0ba6373d13a5420b80

[flang] More preprocessing.

Original-commit: flang-compiler/f18@a553505c3c99ec8744d5e3435bb14f4feb2f19c9

[flang] Predefined macros (__FILE__, __LINE__, __DATE__, __TIME__).

Original-commit: flang-compiler/f18@8c7f51aa87d711ab63f343cf4ba0131cf3728264

[flang] Merge my local .gitignore with master.

Original-commit: flang-compiler/f18@10134ce28313f46952c00f460ccaaea76478c3e9

[flang] Merge branch 'master' of https://github.com/ThePortlandGroup/f18

Original-commit: flang-compiler/f18@d192939d539f0e592d444b0b3c7a1cef07b3433a

[flang] Remove line that was added by mistake

Original-commit: flang-compiler/f18@629348c130ff2d685c9a5d123bdbae9fad676fd0

[flang] Add CMakeLists.txt and .gitignore

Original-commit: flang-compiler/f18@d9a1ea4c49893df5917170270cf6ef5d1880f6ea
Tree-same-pre-rewrite: false

[flang] Support #if/#elif directives with Fortran/C expressions.

Original-commit: flang-compiler/f18@5ea8303954b27b819c37ae87a5fc107a2f0bfa41

[flang] Remove some scaffolding code that I just inadvertently committed, sorry.

Original-commit: flang-compiler/f18@df4dc2ff9481c04ddc35e3650d03c4efe39e9c39

[flang] Preprocessor work.  f18 now passes all my tests except for #if (expression)
and file inclusion.

Original-commit: flang-compiler/f18@07ebac21f543a224a8f426faf206f7525899081e

[flang] Clean up: convert CharPointerWithLength into a proper class.

Original-commit: flang-compiler/f18@514823234fefd422dce2c9f7407c208982e459de

[flang] Add temporary driver main program f2018-demo.cc.

Original-commit: flang-compiler/f18@bbe51ba0ec745088d3cee6d5a170b21fdc71e750

[flang] Add source.{h,cc}.

Original-commit: flang-compiler/f18@39df4a3ef416fa8484542152f2085e9b5a039d53

[flang] Add prescan.{h,cc}.

Original-commit: flang-compiler/f18@6437ba318c8761ad8206dc88d700717fdd4131b7

[flang] Add preprocessor.{h,cc}.

Original-commit: flang-compiler/f18@8ac9fc913d3762f791a411f34fa4f9622d6b3950

[flang] Add position.{h,cc}.

Original-commit: flang-compiler/f18@78c9c256ba1c68946be1a9f7ef87dd704fd1ef27

[flang] Add parse-tree.{h,cc}.

Original-commit: flang-compiler/f18@bface7a17bb774d10f4615e2816f1aa178b49a1a

[flang] Add message.{h,cc}.

Original-commit: flang-compiler/f18@9c21346414a4e13f1bef8b40607880fbcb9bb7f6