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Retargeted to rust#10

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db48x wants to merge 93 commits intoeric-s-raymond:retargetingeric-s-raymond/flex:retargetingfrom db48x:retargeted-to-rustdb48x/flex:retargeted-to-rustCopy head branch name to clipboard

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Commits on Oct 14, 2020

• WIP: adding a Rust target

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• misc minor fixes

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• ported up to the input method

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• port lex, mostly

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• fix the 'yy_match loop by extending it around the 'find_action loop

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• mutable version of current_buffer method, fix loop break conditions, and expand a few C macros

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• get Scan::input compiling

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• implement Scan::get_next_buffer and Scan::get_previous_state

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• implement Scan::try_NUL_trans

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• implement Scan::unput

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• port Scan::input

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• port restart and switch_to_buffer

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• BufferState::{new,init,flush}

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• get rid of delete_buffer; the caller can drop a buffer at any time

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• port {push,pop}_buffer_state

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• remove buffer_stack_{top,max} members

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• make buffer_stack a plain Vec, and remove ensure_buffer_stack

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• Scan::{new,init}

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• clean up stray init_buffer call

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• clean up yywrap function

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• clean up accessor methods, utility methods, malloc/realloc/free methods

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• no, BufferState::init cannot take an &mut Scan because borrow checker

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• Scan is a dumb name; Scanner is better

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• on second thought, make FILE store a *mut libc::FILE

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• a few minor things suggested by clippy

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• set the start state correctly

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• set the new buffer size correctly

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• initialize an empty buffer correctly

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• fix dumb mistakes while reading

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• use a "safer" way of reading into our buffer

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• look up the equivalence class correctly

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• clean up some left-over pointer confusion

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• Handle successful reads at the end of the file correctly.

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• pass the correct offset to Scanner::read

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• silence a warning

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• add main.rs so that the demo can be run

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Commits on Oct 15, 2020

• Support stdin as an input source, and don't use libc for io

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• factor Scanner::read a bit

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• port the last few functions: scan_from_buffer, scan_bytes, and scan_string

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• Merge branch 'retargeting' into retargeted-to-rust

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Commits on Oct 16, 2020

• clean up the code by removing repetitive and redundant prefixes and suffixes

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Commits on Oct 17, 2020

• remove libc crate now that it's not necessary

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Commits on Oct 25, 2020

• Merge remote-tracking branch 'esr/retargeting' into retargeted-to-rust

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• update the rust skeleton from the new c99 skeleton

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Commits on Oct 26, 2020

• Merge remote-tracking branch 'esr/retargeting' into retargeted-to-rust

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Commits on Nov 23, 2020

• Merge remote-tracking branch 'esr/retargeting' into retargeted-to-rust

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Commits on Nov 24, 2020

• check that each skeleton we build has the correct number of sections

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• add a newline after M4_HOOK_STATE_CASE_TERMINATE

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Commits on Dec 3, 2020

• eliminate some more C syntax

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• add a Rust target

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• move the first rust targeting work to a subdirectory

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• Merge remote-tracking branch 'esr/retargeting' into HEAD

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Commits on Dec 4, 2020

• remove the --backend option, since it duplicates the --emit option

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Commits on Dec 8, 2020

• output explicit make rules for building Rust tests

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• change context_call to use M4_PROPERTY_CONTEXT_CALL_FORMAT with substitutions

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Commits on Dec 9, 2020

• change context_call to use M4_PROPERTY_CONTEXT_CALL_FORMAT with substitutions

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• Change the Rust skeleton to return Result<isize> by default

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• fix debug mode and debug mode output

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• hide some warnings

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• fix at_bol checks

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• skip yy prefix in context_member as well

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• rename Rust 'length' member to 'leng' for better compatibility

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• EOF_STATE_CASE_FALLTHROUGH should just be 'yyterminate'

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• fixes for code implementing M4_MODE_LINENO

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• change the lineno test so that it doesn't use increment and decrement

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• allow redundant_semicolons too

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• s/num_to_read/number_to_read/

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• state_buf is a stack, so use push/pop instead of an index

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• array indices are usize in REJECT impl

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• yymoreaddaybol test needs to use M4_TEST_ASSERT macro

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• yyless cannot be a macro after all

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• fix iterator in more method

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• fix adding and subtracting more_offset to leng

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• more_flag is boolean

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• less method needs to call self.more_adj

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• characters are u8

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• m4 hack for special handling of unput

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• fix bol test

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• handle eof (reading zero bytes) correctly

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• fix compile errors in all tests using lineno, and to get vartrailing_rust working

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• recombine less method, now that it doesn't need any conditions

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• handle copying into text_buf correctly (I think)

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• accidentally deleted a ]])

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• hide some minor warnings

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• compute range correctly in do_before_action

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• introduce test macros for some C/Rust/Go differences

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• bring the Go backend up to scratch so that its tests pass

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• Merge remote-tracking branch 'esr/retargeting' into retargeted-to-rust

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• remove obsolete file rust_backend.c

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• remove a debugging printf

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• remove some rules from the Makefile that are no longer needed

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Commits on Dec 13, 2020

• make the rust skeleton produce fewer random empty lines

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• was slightly overagressive at removing unnecessary make productions

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