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Geoff RomerandJon Meow 6ac3adfa53 Factor out a Pattern sum type from Expression (#685) 
`Pattern` is intended to pilot some changes I would like to apply to all our sum types:
- The alternatives are expressed as derived classes rather than members of a `std::variant`.
- The alternatives are classes in the [style guide sense](https://google.github.io/styleguide/cppguide.html#Structs_vs._Classes), meaning they can have invariants, but can't have public data members.
- Creating an object is expressed using a constructor rather than a factory function.
- Accessing an alternative is expressed as a cast (using LLVM's RTTI system) rather than `std::get` or a `Get` method.

Co-authored-by: Jon Meow <46229924+jonmeow@users.noreply.github.com>
2021-07-30 12:24:12 -07:00
..
abstract_syntax_tree.h
Migrate declaration parsing to value semantics (#614)
2021-06-30 13:09:12 -07:00
BUILD
Factor out a Pattern sum type from Expression (#685)
2021-07-30 12:24:12 -07:00
declaration.cpp
Factor out a Pattern sum type from Expression (#685)
2021-07-30 12:24:12 -07:00
declaration.h
Factor out a Pattern sum type from Expression (#685)
2021-07-30 12:24:12 -07:00
expression_test.cpp
Factor out a Pattern sum type from Expression (#685)
2021-07-30 12:24:12 -07:00
expression.cpp
Factor out a Pattern sum type from Expression (#685)
2021-07-30 12:24:12 -07:00
expression.h
Factor out a Pattern sum type from Expression (#685)
2021-07-30 12:24:12 -07:00
function_definition.cpp
Generic functions, first baby step (#658)
2021-07-22 15:16:56 -04:00
function_definition.h
Factor out a Pattern sum type from Expression (#685)
2021-07-30 12:24:12 -07:00
member.cpp
Factor out a Pattern sum type from Expression (#685)
2021-07-30 12:24:12 -07:00
member.h
Factor out a Pattern sum type from Expression (#685)
2021-07-30 12:24:12 -07:00
pattern_test.cpp
Factor out a Pattern sum type from Expression (#685)
2021-07-30 12:24:12 -07:00
pattern.cpp
Factor out a Pattern sum type from Expression (#685)
2021-07-30 12:24:12 -07:00
pattern.h
Factor out a Pattern sum type from Expression (#685)
2021-07-30 12:24:12 -07:00
statement.cpp
Factor out a Pattern sum type from Expression (#685)
2021-07-30 12:24:12 -07:00
statement.h
Factor out a Pattern sum type from Expression (#685)
2021-07-30 12:24:12 -07:00
struct_definition.h
Migrate Declaration to variant (#644)
2021-07-15 16:22:56 -07:00