init: Spoofax language project as generated

syntax/Common.sdf3

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+module Common
+
+lexical sorts
+  ID INT STRING
+  STRING_CHAR BACKSLASH_CHAR
+  COMMENT_CHAR INSIDE_COMMENT
+  NEWLINE_EOF EOF
+
+lexical syntax
+
+  ID               = [a-zA-Z] [a-zA-Z0-9]*
+  INT              = "-"? [0-9]+
+  STRING           = "\"" STRING_CHAR* "\""
+  STRING_CHAR      = ~[\"\n]
+  STRING_CHAR      = "\\\""
+  STRING_CHAR      = BACKSLASH_CHAR
+  BACKSLASH_CHAR   = "\\"
+  LAYOUT           = [\ \t\n\r]
+  COMMENT_CHAR     = [\*]
+  LAYOUT           = "/*" INSIDE_COMMENT* "*/"
+  INSIDE_COMMENT   = ~[\*]
+  INSIDE_COMMENT   = COMMENT_CHAR
+  LAYOUT           = "//" ~[\n\r]* NEWLINE_EOF
+  NEWLINE_EOF      = [\n\r]
+  NEWLINE_EOF      = EOF
+  EOF              =
+
+lexical restrictions
+
+  // Ensure greedy matching for lexicals
+  
+  COMMENT_CHAR    -/- [\/]
+  INT             -/- [0-9]
+  ID              -/- [a-zA-Z0-9\_]
+  
+  // EOF may not be followed by any char
+  
+  EOF             -/- ~[]
+  
+  // Backslash chars in strings may not be followed by " 
+  
+  BACKSLASH_CHAR  -/- [\"]
+
+context-free restrictions
+
+  // Ensure greedy matching for comments
+  
+  LAYOUT? -/- [\ \t\n\r]
+  LAYOUT? -/- [\/].[\/]
+  LAYOUT? -/- [\/].[\*]

syntax/Spoofax-Propositional-Language.sdf3

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+module Spoofax-Propositional-Language
+
+imports
+  
+  Common
+
+context-free start-symbols
+  
+  Start
+
+context-free sorts
+
+  Start
+
+context-free syntax
+  
+  Start.Empty = <>