FlowIf

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Conditional flow control with failure context in test condition.

Children are Clause block nodes in the following order:

• if_identifier ]
• condition |- Repeating
• [then_body] ]
• [else_body] Optional last node

If Identifier blocks - must be present and is simply an empty Clause meant to hold information about comments surrounding the 'if' identifier in the original source code Condition blocks - must be present (they cannot be omitted - there must be at least 1) and they must have 1 or more expressions where 1 or more of the expressions can fail. Any local variables within it's top scope are made available to any immediately following then block. Then blocks - are optional (they can be omitted) and when present must follow a conditional block and may have zero (can be empty) or more expressions. Else block - is optional (it can be omitted) and when present must follow a conditional or then block (it cannot be the only block), must be the last block and it may have zero (can be empty) or more expressions.

Chained `else if_ are automatically flattened into a single FlowIf node with multiple condition/[then] block pairs followed by an optional else block.

An `if_ may be used as an expression with a result if all the control flow paths have a common result - i.e. it will have a result if every condition is paired with a then block and there is an ending else block and all the then blocks and else block have a most common result type.

Syntax

struct FlowIf : public Verse::Vst::Node  
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struct FlowIf : public Verse::Vst::Node

Inheritance Hierarchy

• CSharedMix → Node → FlowIf

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Overridden from Node