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Schema node type of an AST node

Source: R/ast-schema.R
schema_type.Rd

Maps an S3 AST node onto its schema node type, resolving the declaration/reference ambiguity through the "multimod" class marker: a node carrying it is a declaration, one without it is a reference.

Usage

schema_type(x)

Arguments

x

An AST node.

Value

A single string naming a node type in ast_schema(), or NA_character_ if x is not an AST node or its class is unknown.

See also

ast_schema()

Examples

schema_type(ast_symbol("t"))
#> [1] "symbol"
schema_type(ast_set("tech"))   # a reference
#> [1] "set_ref"
schema_type(new_set("tech"))   # a declaration
#> [1] "set_decl"