SymbolProvider (Manifold :: Preprocessor 2026.1.6 API)

```
public interface SymbolProvider
```
Implement this service provider interface to augment the preprocessor's symbol set with custom symbols. See library, manifold-preprocessor-android-syms, for an example.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`String`	`getValue(Definitions rootDefinitions, manifold.api.fs.IFile sourceFile, String def)`	Returns the string representation of the value of `def` if it exists in this provider.
`boolean`	`isDefined(Definitions rootDefinitions, manifold.api.fs.IFile sourceFile, String def)`	Returns true if the symbol exists in this provider.

- Method Detail
  - isDefined
```
boolean isDefined(Definitions rootDefinitions,
                  manifold.api.fs.IFile sourceFile,
                  String def)
```
    Returns true if the symbol exists in this provider.
    
    Parameters:
    
    rootDefinitions - The Definitions
    
    sourceFile - The path to the source file in context.
    
    def - The name of the preprocessor definition.
    
    Returns:
    
    true iff the symbol exists in this provider.
  - getValue
```
String getValue(Definitions rootDefinitions,
                manifold.api.fs.IFile sourceFile,
                String def)
```
    Returns the string representation of the value of def if it exists in this provider.
    
    Parameters:
    
    rootDefinitions -
    
    sourceFile - The path to the source file in context.
    
    def - The name of the preprocessor definition.
    
    Returns:
    
    The string representation of the value of def or null if it does not exist in thie provider.