stack_graphs::paths

Enum PathResolutionError

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pub enum PathResolutionError {

Show 15 variants    DisallowedCycle,
    EmptyScopeStack,
    EmptySymbolStack,
    IncompatibleScopeStackVariables,
    IncompatibleSymbolStackVariables,
    IncorrectFile,
    IncorrectPoppedSymbol,
    IncorrectSourceNode,
    MissingAttachedScopeList,
    ScopeStackUnsatisfied,
    SymbolStackUnsatisfied,
    UnboundSymbolStackVariable,
    UnboundScopeStackVariable,
    UnexpectedAttachedScopeList,
    UnknownAttachedScope,

}
Expand description

Errors that can occur during the path resolution process.

Variants§

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DisallowedCycle

The path is cyclic, and the cycle is disallowed.

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EmptyScopeStack

The path contains a jump to scope node, but there are no scopes on the scope stack to jump to.

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EmptySymbolStack

The path contains a pop symbol or pop scoped symbol node, but there are no symbols on the symbol stack to pop off.

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IncompatibleScopeStackVariables

The partial path contains multiple references to a scope stack variable, and those references can’t unify on a single scope stack.

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IncompatibleSymbolStackVariables

The partial path contains multiple references to a symbol stack variable, and those references can’t unify on a single symbol stack.

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IncorrectFile

The partial path contains edges from multiple files.

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IncorrectPoppedSymbol

The path contains a pop symbol or pop scoped symbol node, but the symbol at the top of the symbol stack does not match.

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IncorrectSourceNode

The path contains an edge whose source node does not match the sink node of the preceding edge.

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MissingAttachedScopeList

The path contains a pop scoped symbol node, but the symbol at the top of the symbol stack does not have an attached scope list to pop off.

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ScopeStackUnsatisfied

The path’s scope stack does not satisfy the partial path’s scope stack precondition.

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SymbolStackUnsatisfied

The path’s symbol stack does not satisfy the partial path’s symbol stack precondition.

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UnboundSymbolStackVariable

The partial path’s postcondition references a symbol stack variable that isn’t present in the precondition.

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UnboundScopeStackVariable

The partial path’s postcondition references a scope stack variable that isn’t present in the precondition.

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UnexpectedAttachedScopeList

The path contains a pop symbol node, but the symbol at the top of the symbol stack has an attached scope list that we weren’t expecting.

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UnknownAttachedScope

A push scoped symbol node referes to an exported scope node that doesn’t exist.

Trait Implementations§

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impl Debug for PathResolutionError

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

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