Feature/fix 4150 - prevent invalid codegen in Go #4161
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…lashes with builtin funcs Signed-off-by: Jim.Idle <[email protected]>
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…lashes with builtin funcs (antlr#4161) Signed-off-by: Jim.Idle <[email protected]>
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…lashes with builtin funcs (antlr#4161) Signed-off-by: Jim.Idle <[email protected]>
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* fix: Fixes the failing go runtime test suite which was missing the /v4 off the replace option on the go.mod file Arrrgh! Signed-off-by: Jim.Idle <[email protected]> * present antlr before versioning (#4156) Signed-off-by: Jim.Idle <[email protected]> * fix: Prevent use of labels such as start= from generating code that clashes with builtin funcs (#4161) Signed-off-by: Jim.Idle <[email protected]> * fix: Cater for the fact that some test rules use start as a label or rule name As a fix for other cvode gen errors when start, end, or exception are used as label names, they are now translated to have a suffix of `_` at code gen time. However, the runtime tests sometimes use start as a rule name and so we must now cater for this in the tests. Signed-off-by: Jim.Idle <[email protected]> --------- Signed-off-by: Jim.Idle <[email protected]> Co-authored-by: ericvergnaud <[email protected]>
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…lashes with builtin funcs (antlr#4161) Signed-off-by: Jim.Idle <[email protected]>
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* fix: Fixes the failing go runtime test suite which was missing the /v4 off the replace option on the go.mod file Arrrgh! Signed-off-by: Jim.Idle <[email protected]> * present antlr before versioning (antlr#4156) Signed-off-by: Jim.Idle <[email protected]> * fix: Prevent use of labels such as start= from generating code that clashes with builtin funcs (antlr#4161) Signed-off-by: Jim.Idle <[email protected]> * fix: Cater for the fact that some test rules use start as a label or rule name As a fix for other cvode gen errors when start, end, or exception are used as label names, they are now translated to have a suffix of `_` at code gen time. However, the runtime tests sometimes use start as a rule name and so we must now cater for this in the tests. Signed-off-by: Jim.Idle <[email protected]> --------- Signed-off-by: Jim.Idle <[email protected]> Co-authored-by: ericvergnaud <[email protected]>
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…lashes with builtin funcs (antlr#4161) Signed-off-by: Jim.Idle <[email protected]>
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* fix: Fixes the failing go runtime test suite which was missing the /v4 off the replace option on the go.mod file Arrrgh! Signed-off-by: Jim.Idle <[email protected]> * present antlr before versioning (antlr#4156) Signed-off-by: Jim.Idle <[email protected]> * fix: Prevent use of labels such as start= from generating code that clashes with builtin funcs (antlr#4161) Signed-off-by: Jim.Idle <[email protected]> * fix: Cater for the fact that some test rules use start as a label or rule name As a fix for other cvode gen errors when start, end, or exception are used as label names, they are now translated to have a suffix of `_` at code gen time. However, the runtime tests sometimes use start as a rule name and so we must now cater for this in the tests. Signed-off-by: Jim.Idle <[email protected]> --------- Signed-off-by: Jim.Idle <[email protected]> Co-authored-by: ericvergnaud <[email protected]> Signed-off-by: Jim.Idle <[email protected]>
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…4169) * doc: Updates to some of the Go doc comments to start a ful ldocumentation cleanup Signed-off-by: Jim.Idle <[email protected]> * doc: More documentation fixes. Using this as a method of forcing myself to read every line of code in the runtime, and therefore discover mistakes in the original implementation. And, of course, actually working docs for the Go runtime, can only be a good thing. Signed-off-by: Jim.Idle <[email protected]> * doc: More documentation fixes Also changes the exporet level of a some variables and funcs that were not correct, even though no user has currently needed them it would seem. Signed-off-by: Jim.Idle <[email protected]> * doc: Many updates to document exported fuctions correctly and reformat the ingerited Java code It looks like a massive amount of changes, but it is almost all doc or changing exports or renaming unused paramters etc to make the Go linter happy. No actual code changes yet. Signed-off-by: Jim.Idle <[email protected]> * doc: More additions and corrections to the Go documentation for the runtime Signed-off-by: Jim.Idle <[email protected]> * doc: Final clean of exported func and type documentation There will be more to do here as there are a lot of things that are hidden internal to the antlr package that probably should not be. There are also a lot of exported funcs and types without any documentation, that will eventually need to be cleaned up. Signed-off-by: Jim.Idle <[email protected]> * Changed Parser typings (#4149) Signed-off-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Signed-off-by: Jim.Idle <[email protected]> * fix: Fixes the failing go runtime test suite which was missing the /v4 off the replace option on the go.mod file (#4163) Arrrgh! Signed-off-by: Jim.Idle <[email protected]> * present antlr before versioning (#4156) Signed-off-by: Jim.Idle <[email protected]> * fix: Prevent use of labels such as start= from generating code that clashes with builtin funcs (#4161) Signed-off-by: Jim.Idle <[email protected]> * Feature/gotestfix (#4168) * fix: Fixes the failing go runtime test suite which was missing the /v4 off the replace option on the go.mod file Arrrgh! Signed-off-by: Jim.Idle <[email protected]> * present antlr before versioning (#4156) Signed-off-by: Jim.Idle <[email protected]> * fix: Prevent use of labels such as start= from generating code that clashes with builtin funcs (#4161) Signed-off-by: Jim.Idle <[email protected]> * fix: Cater for the fact that some test rules use start as a label or rule name As a fix for other cvode gen errors when start, end, or exception are used as label names, they are now translated to have a suffix of `_` at code gen time. However, the runtime tests sometimes use start as a rule name and so we must now cater for this in the tests. Signed-off-by: Jim.Idle <[email protected]> --------- Signed-off-by: Jim.Idle <[email protected]> Co-authored-by: ericvergnaud <[email protected]> Signed-off-by: Jim.Idle <[email protected]> --------- Signed-off-by: Jim.Idle <[email protected]> Signed-off-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Co-authored-by: ericvergnaud <[email protected]>
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Mar 13, 2023
…ntlr#4169) * doc: Updates to some of the Go doc comments to start a ful ldocumentation cleanup Signed-off-by: Jim.Idle <[email protected]> * doc: More documentation fixes. Using this as a method of forcing myself to read every line of code in the runtime, and therefore discover mistakes in the original implementation. And, of course, actually working docs for the Go runtime, can only be a good thing. Signed-off-by: Jim.Idle <[email protected]> * doc: More documentation fixes Also changes the exporet level of a some variables and funcs that were not correct, even though no user has currently needed them it would seem. Signed-off-by: Jim.Idle <[email protected]> * doc: Many updates to document exported fuctions correctly and reformat the ingerited Java code It looks like a massive amount of changes, but it is almost all doc or changing exports or renaming unused paramters etc to make the Go linter happy. No actual code changes yet. Signed-off-by: Jim.Idle <[email protected]> * doc: More additions and corrections to the Go documentation for the runtime Signed-off-by: Jim.Idle <[email protected]> * doc: Final clean of exported func and type documentation There will be more to do here as there are a lot of things that are hidden internal to the antlr package that probably should not be. There are also a lot of exported funcs and types without any documentation, that will eventually need to be cleaned up. Signed-off-by: Jim.Idle <[email protected]> * Changed Parser typings (antlr#4149) Signed-off-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Signed-off-by: Jim.Idle <[email protected]> * fix: Fixes the failing go runtime test suite which was missing the /v4 off the replace option on the go.mod file (antlr#4163) Arrrgh! Signed-off-by: Jim.Idle <[email protected]> * present antlr before versioning (antlr#4156) Signed-off-by: Jim.Idle <[email protected]> * fix: Prevent use of labels such as start= from generating code that clashes with builtin funcs (antlr#4161) Signed-off-by: Jim.Idle <[email protected]> * Feature/gotestfix (antlr#4168) * fix: Fixes the failing go runtime test suite which was missing the /v4 off the replace option on the go.mod file Arrrgh! Signed-off-by: Jim.Idle <[email protected]> * present antlr before versioning (antlr#4156) Signed-off-by: Jim.Idle <[email protected]> * fix: Prevent use of labels such as start= from generating code that clashes with builtin funcs (antlr#4161) Signed-off-by: Jim.Idle <[email protected]> * fix: Cater for the fact that some test rules use start as a label or rule name As a fix for other cvode gen errors when start, end, or exception are used as label names, they are now translated to have a suffix of `_` at code gen time. However, the runtime tests sometimes use start as a rule name and so we must now cater for this in the tests. Signed-off-by: Jim.Idle <[email protected]> --------- Signed-off-by: Jim.Idle <[email protected]> Co-authored-by: ericvergnaud <[email protected]> Signed-off-by: Jim.Idle <[email protected]> --------- Signed-off-by: Jim.Idle <[email protected]> Signed-off-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Co-authored-by: ericvergnaud <[email protected]>
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* feat: Createa n Init routine for BaseATNConfig so we can embed sructs rather than allocate to pointers Signed-off-by: Jim.Idle <[email protected]> * feat: Change BaseATNConfig to be properly embedded in other structs such as LexerATNConfig instead of by pointer This is the first of many changes that switches the embedded class structure that was copying Java class hieracrchy from allocations/new to proper embedding such that any struct is allocated with one allocation not two or more. Main PR will cover what this means. Signed-off-by: Jim.Idle <[email protected]> * feat: Change embedding for ATNBaseSimulator to true embedding instaed of pointer Saves an extra allocation and helps the GC Signed-off-by: Jim.Idle <[email protected]> * feat: Switch the use of pointers to embedded ATN states to true embeddding Saves many allocations and grbage collections Signed-off-by: Jim.Idle <[email protected]> * fix: Correct the way that PredictionContext is compared for merge Should reduce allocation count by tons. Signed-off-by: Jim.Idle <[email protected]> * Feature/docclean Greatly improve the godoc comments in the runtime (#4169) * doc: Updates to some of the Go doc comments to start a ful ldocumentation cleanup Signed-off-by: Jim.Idle <[email protected]> * doc: More documentation fixes. Using this as a method of forcing myself to read every line of code in the runtime, and therefore discover mistakes in the original implementation. And, of course, actually working docs for the Go runtime, can only be a good thing. Signed-off-by: Jim.Idle <[email protected]> * doc: More documentation fixes Also changes the exporet level of a some variables and funcs that were not correct, even though no user has currently needed them it would seem. Signed-off-by: Jim.Idle <[email protected]> * doc: Many updates to document exported fuctions correctly and reformat the ingerited Java code It looks like a massive amount of changes, but it is almost all doc or changing exports or renaming unused paramters etc to make the Go linter happy. No actual code changes yet. Signed-off-by: Jim.Idle <[email protected]> * doc: More additions and corrections to the Go documentation for the runtime Signed-off-by: Jim.Idle <[email protected]> * doc: Final clean of exported func and type documentation There will be more to do here as there are a lot of things that are hidden internal to the antlr package that probably should not be. There are also a lot of exported funcs and types without any documentation, that will eventually need to be cleaned up. Signed-off-by: Jim.Idle <[email protected]> * Changed Parser typings (#4149) Signed-off-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Signed-off-by: Jim.Idle <[email protected]> * fix: Fixes the failing go runtime test suite which was missing the /v4 off the replace option on the go.mod file (#4163) Arrrgh! Signed-off-by: Jim.Idle <[email protected]> * present antlr before versioning (#4156) Signed-off-by: Jim.Idle <[email protected]> * fix: Prevent use of labels such as start= from generating code that clashes with builtin funcs (#4161) Signed-off-by: Jim.Idle <[email protected]> * Feature/gotestfix (#4168) * fix: Fixes the failing go runtime test suite which was missing the /v4 off the replace option on the go.mod file Arrrgh! Signed-off-by: Jim.Idle <[email protected]> * present antlr before versioning (#4156) Signed-off-by: Jim.Idle <[email protected]> * fix: Prevent use of labels such as start= from generating code that clashes with builtin funcs (#4161) Signed-off-by: Jim.Idle <[email protected]> * fix: Cater for the fact that some test rules use start as a label or rule name As a fix for other cvode gen errors when start, end, or exception are used as label names, they are now translated to have a suffix of `_` at code gen time. However, the runtime tests sometimes use start as a rule name and so we must now cater for this in the tests. Signed-off-by: Jim.Idle <[email protected]> --------- Signed-off-by: Jim.Idle <[email protected]> Co-authored-by: ericvergnaud <[email protected]> Signed-off-by: Jim.Idle <[email protected]> --------- Signed-off-by: Jim.Idle <[email protected]> Signed-off-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Co-authored-by: ericvergnaud <[email protected]> * feat: Change BaseATNConfig to be properly embedded in other structs such as LexerATNConfig instead of by pointer This is the first of many changes that switches the embedded class structure that was copying Java class hieracrchy from allocations/new to proper embedding such that any struct is allocated with one allocation not two or more. Main PR will cover what this means. Signed-off-by: Jim.Idle <[email protected]> * feat: Change embedding for ATNBaseSimulator to true embedding instaed of pointer Saves an extra allocation and helps the GC Signed-off-by: Jim.Idle <[email protected]> * fix: Correct the way that PredictionContext is compared for merge Should reduce allocation count by tons. Signed-off-by: Jim.Idle <[email protected]> * doc: Merge documentation updates Signed-off-by: Jim.Idle <[email protected]> * feat: Rework predictions tructs to use emedding instead of pointers Signed-off-by: Jim.Idle <[email protected]> * feat: more reworking of PredictionContext for embedding Signed-off-by: Jim.Idle <[email protected]> * feat: Ensure that EmptyPredictionContext is correctly initialized Rework of the variaous PredictionContexts has reduced memory allocations to between 30% and 50% of previous version. Signed-off-by: Jim.Idle <[email protected]> * feat: Change from use of type casting to using stored type Signed-off-by: Jim.Idle <[email protected]> * feat: Convert CommonToken to true emedding rather than pointers Signed-off-by: Jim.Idle <[email protected]> --------- Signed-off-by: Jim.Idle <[email protected]> Signed-off-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Co-authored-by: ericvergnaud <[email protected]>
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…lashes with builtin funcs (antlr#4161) Signed-off-by: Jim.Idle <[email protected]>
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* fix: Fixes the failing go runtime test suite which was missing the /v4 off the replace option on the go.mod file Arrrgh! Signed-off-by: Jim.Idle <[email protected]> * present antlr before versioning (antlr#4156) Signed-off-by: Jim.Idle <[email protected]> * fix: Prevent use of labels such as start= from generating code that clashes with builtin funcs (antlr#4161) Signed-off-by: Jim.Idle <[email protected]> * fix: Cater for the fact that some test rules use start as a label or rule name As a fix for other cvode gen errors when start, end, or exception are used as label names, they are now translated to have a suffix of `_` at code gen time. However, the runtime tests sometimes use start as a rule name and so we must now cater for this in the tests. Signed-off-by: Jim.Idle <[email protected]> --------- Signed-off-by: Jim.Idle <[email protected]> Co-authored-by: ericvergnaud <[email protected]> Signed-off-by: Jim.Idle <[email protected]>
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…ntlr#4169) * doc: Updates to some of the Go doc comments to start a ful ldocumentation cleanup Signed-off-by: Jim.Idle <[email protected]> * doc: More documentation fixes. Using this as a method of forcing myself to read every line of code in the runtime, and therefore discover mistakes in the original implementation. And, of course, actually working docs for the Go runtime, can only be a good thing. Signed-off-by: Jim.Idle <[email protected]> * doc: More documentation fixes Also changes the exporet level of a some variables and funcs that were not correct, even though no user has currently needed them it would seem. Signed-off-by: Jim.Idle <[email protected]> * doc: Many updates to document exported fuctions correctly and reformat the ingerited Java code It looks like a massive amount of changes, but it is almost all doc or changing exports or renaming unused paramters etc to make the Go linter happy. No actual code changes yet. Signed-off-by: Jim.Idle <[email protected]> * doc: More additions and corrections to the Go documentation for the runtime Signed-off-by: Jim.Idle <[email protected]> * doc: Final clean of exported func and type documentation There will be more to do here as there are a lot of things that are hidden internal to the antlr package that probably should not be. There are also a lot of exported funcs and types without any documentation, that will eventually need to be cleaned up. Signed-off-by: Jim.Idle <[email protected]> * Changed Parser typings (antlr#4149) Signed-off-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Signed-off-by: Jim.Idle <[email protected]> * fix: Fixes the failing go runtime test suite which was missing the /v4 off the replace option on the go.mod file (antlr#4163) Arrrgh! Signed-off-by: Jim.Idle <[email protected]> * present antlr before versioning (antlr#4156) Signed-off-by: Jim.Idle <[email protected]> * fix: Prevent use of labels such as start= from generating code that clashes with builtin funcs (antlr#4161) Signed-off-by: Jim.Idle <[email protected]> * Feature/gotestfix (antlr#4168) * fix: Fixes the failing go runtime test suite which was missing the /v4 off the replace option on the go.mod file Arrrgh! Signed-off-by: Jim.Idle <[email protected]> * present antlr before versioning (antlr#4156) Signed-off-by: Jim.Idle <[email protected]> * fix: Prevent use of labels such as start= from generating code that clashes with builtin funcs (antlr#4161) Signed-off-by: Jim.Idle <[email protected]> * fix: Cater for the fact that some test rules use start as a label or rule name As a fix for other cvode gen errors when start, end, or exception are used as label names, they are now translated to have a suffix of `_` at code gen time. However, the runtime tests sometimes use start as a rule name and so we must now cater for this in the tests. Signed-off-by: Jim.Idle <[email protected]> --------- Signed-off-by: Jim.Idle <[email protected]> Co-authored-by: ericvergnaud <[email protected]> Signed-off-by: Jim.Idle <[email protected]> --------- Signed-off-by: Jim.Idle <[email protected]> Signed-off-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Co-authored-by: ericvergnaud <[email protected]> Signed-off-by: Jim.Idle <[email protected]>
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* feat: Createa n Init routine for BaseATNConfig so we can embed sructs rather than allocate to pointers Signed-off-by: Jim.Idle <[email protected]> * feat: Change BaseATNConfig to be properly embedded in other structs such as LexerATNConfig instead of by pointer This is the first of many changes that switches the embedded class structure that was copying Java class hieracrchy from allocations/new to proper embedding such that any struct is allocated with one allocation not two or more. Main PR will cover what this means. Signed-off-by: Jim.Idle <[email protected]> * feat: Change embedding for ATNBaseSimulator to true embedding instaed of pointer Saves an extra allocation and helps the GC Signed-off-by: Jim.Idle <[email protected]> * feat: Switch the use of pointers to embedded ATN states to true embeddding Saves many allocations and grbage collections Signed-off-by: Jim.Idle <[email protected]> * fix: Correct the way that PredictionContext is compared for merge Should reduce allocation count by tons. Signed-off-by: Jim.Idle <[email protected]> * Feature/docclean Greatly improve the godoc comments in the runtime (antlr#4169) * doc: Updates to some of the Go doc comments to start a ful ldocumentation cleanup Signed-off-by: Jim.Idle <[email protected]> * doc: More documentation fixes. Using this as a method of forcing myself to read every line of code in the runtime, and therefore discover mistakes in the original implementation. And, of course, actually working docs for the Go runtime, can only be a good thing. Signed-off-by: Jim.Idle <[email protected]> * doc: More documentation fixes Also changes the exporet level of a some variables and funcs that were not correct, even though no user has currently needed them it would seem. Signed-off-by: Jim.Idle <[email protected]> * doc: Many updates to document exported fuctions correctly and reformat the ingerited Java code It looks like a massive amount of changes, but it is almost all doc or changing exports or renaming unused paramters etc to make the Go linter happy. No actual code changes yet. Signed-off-by: Jim.Idle <[email protected]> * doc: More additions and corrections to the Go documentation for the runtime Signed-off-by: Jim.Idle <[email protected]> * doc: Final clean of exported func and type documentation There will be more to do here as there are a lot of things that are hidden internal to the antlr package that probably should not be. There are also a lot of exported funcs and types without any documentation, that will eventually need to be cleaned up. Signed-off-by: Jim.Idle <[email protected]> * Changed Parser typings (antlr#4149) Signed-off-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Signed-off-by: Jim.Idle <[email protected]> * fix: Fixes the failing go runtime test suite which was missing the /v4 off the replace option on the go.mod file (antlr#4163) Arrrgh! Signed-off-by: Jim.Idle <[email protected]> * present antlr before versioning (antlr#4156) Signed-off-by: Jim.Idle <[email protected]> * fix: Prevent use of labels such as start= from generating code that clashes with builtin funcs (antlr#4161) Signed-off-by: Jim.Idle <[email protected]> * Feature/gotestfix (antlr#4168) * fix: Fixes the failing go runtime test suite which was missing the /v4 off the replace option on the go.mod file Arrrgh! Signed-off-by: Jim.Idle <[email protected]> * present antlr before versioning (antlr#4156) Signed-off-by: Jim.Idle <[email protected]> * fix: Prevent use of labels such as start= from generating code that clashes with builtin funcs (antlr#4161) Signed-off-by: Jim.Idle <[email protected]> * fix: Cater for the fact that some test rules use start as a label or rule name As a fix for other cvode gen errors when start, end, or exception are used as label names, they are now translated to have a suffix of `_` at code gen time. However, the runtime tests sometimes use start as a rule name and so we must now cater for this in the tests. Signed-off-by: Jim.Idle <[email protected]> --------- Signed-off-by: Jim.Idle <[email protected]> Co-authored-by: ericvergnaud <[email protected]> Signed-off-by: Jim.Idle <[email protected]> --------- Signed-off-by: Jim.Idle <[email protected]> Signed-off-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Co-authored-by: ericvergnaud <[email protected]> * feat: Change BaseATNConfig to be properly embedded in other structs such as LexerATNConfig instead of by pointer This is the first of many changes that switches the embedded class structure that was copying Java class hieracrchy from allocations/new to proper embedding such that any struct is allocated with one allocation not two or more. Main PR will cover what this means. Signed-off-by: Jim.Idle <[email protected]> * feat: Change embedding for ATNBaseSimulator to true embedding instaed of pointer Saves an extra allocation and helps the GC Signed-off-by: Jim.Idle <[email protected]> * fix: Correct the way that PredictionContext is compared for merge Should reduce allocation count by tons. Signed-off-by: Jim.Idle <[email protected]> * doc: Merge documentation updates Signed-off-by: Jim.Idle <[email protected]> * feat: Rework predictions tructs to use emedding instead of pointers Signed-off-by: Jim.Idle <[email protected]> * feat: more reworking of PredictionContext for embedding Signed-off-by: Jim.Idle <[email protected]> * feat: Ensure that EmptyPredictionContext is correctly initialized Rework of the variaous PredictionContexts has reduced memory allocations to between 30% and 50% of previous version. Signed-off-by: Jim.Idle <[email protected]> * feat: Change from use of type casting to using stored type Signed-off-by: Jim.Idle <[email protected]> * feat: Convert CommonToken to true emedding rather than pointers Signed-off-by: Jim.Idle <[email protected]> --------- Signed-off-by: Jim.Idle <[email protected]> Signed-off-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Co-authored-by: Josua Frank <[email protected]> Co-authored-by: ericvergnaud <[email protected]> Signed-off-by: Jim.Idle <[email protected]>
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Fix: Prevent the use of labels start, stop, exception from generating bad go code
closes #4150
It might be best to prevent the use of label names that have an internal clash, such as start text etc, but that is not the case. So this patch registers start, stop and exception as reserved names that must be suffixed with
_.It's still going to be a little confusing as on a rule, the go code will have:
GetStart()which gives the built in rule startGet_Start()which will return the label referenceBut this will prevent people raising errors about code gen that are not really errors.