65 lines
1.2 KiB
Plaintext
65 lines
1.2 KiB
Plaintext
program: decl*
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?decl: iface
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| node
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| func
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sep_trail{item, punc}: item (punc item)? punc?
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func: "fn" ident "(" ")" ("->" ty) "{" "}"
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iface: "iface" ident "{" sep_trail{iface_field, ","} "}"
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iface_field: ident ":" ident
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iface_ref: ident
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iface_refs: iface_ref*
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node: "node" ident ":" iface_refs "{" variants "}"
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variants: variant*
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variant: prod "=>" "{" equations "}"
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prod: sym*
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?sym: sym_rename
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| sym_lit
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sym_lit: ESCAPED_STRING
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sym_rename: "<" ident ":" node_ref ">"
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?node_ref: node_ref_name
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| node_regex
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node_ref_name: ident
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node_regex: ESCAPED_STRING
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equations: equation_semi*
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equation_semi: equation ";"
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// TODO: the left side should really be a separate type
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// called lvalue, and should NOT include literals
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equation: expr "=" expr
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// Expressions
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?expr: expr2
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| expr_add
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expr_add: expr "+" expr2
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?expr2: expr3
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| expr_mul
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| expr_call
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expr_mul: expr2 "*" expr3
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expr_call: expr2 "(" args ")"
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?expr3: "(" expr ")"
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| expr_dot
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| expr_name
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expr_dot: expr3 "." ident
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expr_name: ident
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args: sep_trail{expr, ","}
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ty: ident
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ident: IDENT
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COMMENT: /\/\/[^\n]*/
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IDENT: /([a-zA-Z][a-zA-Z0-9_]*)|(_[a-zA-Z0-9_]+)/
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%import python.STRING
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%import common.WS
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%import common.ESCAPED_STRING
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%ignore WS
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%ignore COMMENT
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