cxlox

This is a C implementation of the xlox language. There are two banches, main and xlox. The main branch is used for the Crafting Interpreters implementation of the lox language. The xlox branch is used for the implementation of the xlox language.

Grammar

program       := declaration*
declaration   := varDecl
               | funDecl
               | classDecl
               | statement
varDecl       := "var" IDENTIFIER ["=" expression] ";"
funDecl       := "fun" IDENTIFIER "(" [IDENTIFIER ("," IDENTIFIER)*] ")" "{" declaration* "}"
classDecl     := "class" IDENTIFIER "{" methodDecl "}"
methodDecl    := IDENT "(" [IDENTIFIER ("," IDENTIFIER)*] ")" "{" declaration* "}"
statement     := exprStmt
               | printStmt
               | blockStmt
               | ifStmt
               | whileStmt
               | forStmt
               | returnStmt
exprStmt      := expr ";"
printStmt     := "print" expr ";"
blockStmt     := "{" declaration* "}"
ifStmt        := "if" "(" expr ")" statement ["else" statement]
whileStmt     := "while" "(" expr ")" statement
forStmt       := "for" "(" (expr | varDecl)? ";" expr? ";" expr? ")" statement
returnStmt    := "return" expr? ";"
expr          := assignment
assignment    := IDENTIFIER "=" assignment
               | equality
equality      := comparison (("==" | "!=") comparison)*
comparison    := addition (("<" | ">" | "<=" | ">=") addition)*
addition      := multiply  (("+" | "-") multiply)*
multiply 	    := unary (("*" | "/") unary)*
unary         := ( "!" | "-") unary
               | call
call          := primary ["(" [expr ("," expr)*)] ")" | "." expr]
primary       := NUMBER
               | STRING
               | IDENTIFIER
               | "true"
               | "false"
               | "nil"
               | "this"
               | "super"
               | "(" expr ")"
NUMBER        := [0-9]+ ("." [0-9]+)?
STRING        := "\"" (CHARACTER)* "\""
IDENTIFIER    := [a-zA-Z_][a-zA-Z0-9_]*

Build

To make this project, you need to install the following dependencies:

• CMake >= 3.10

To create the executable, run the following commands: