51 lines
865 B
OCaml
51 lines
865 B
OCaml
%{
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open Ast
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%}
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%token EOF
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%token KWD_EXTERN
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%token KWD_FN
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%token KWD_RETURN
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%token PUNCT_COLON
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%token PUNCT_LBRACE
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%token PUNCT_LPAREN
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%token PUNCT_RARROW
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%token PUNCT_RBRACE
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%token PUNCT_RPAREN
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%token PUNCT_SEMI
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%token <int> LIT_NEG_INT
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%token <int> LIT_INT
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%token <string> IDENT
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%start <program> program
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%%
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program:
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| decls=decl* EOF { decls }
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decl:
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| func=func { DeclFunc func }
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| extern=extern_func { DeclExternFunc extern }
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func:
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| KWD_FN name=IDENT PUNCT_LPAREN PUNCT_RPAREN body=body { { name; body } }
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extern_func:
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| KWD_EXTERN KWD_FN name=IDENT PUNCT_LPAREN PUNCT_RPAREN PUNCT_SEMI { { name } }
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body:
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| PUNCT_LBRACE stmts=stmt* PUNCT_RBRACE { { stmts; ret=ExprUnit } }
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stmt:
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| KWD_RETURN expr=expr PUNCT_SEMI { StmtReturn expr }
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expr:
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| i=LIT_NEG_INT { ExprLit (LitNegInt i) }
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| i=LIT_INT { ExprLit (LitInt i) }
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(* vim: set ft=ocamlyacc *)
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