Apparently I don't know Gogs' Markdown dialect
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Juhani Krekelä
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ir.md
61
ir.md
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@ -6,35 +6,48 @@ This is produced by `parse`. Each subsection shows the properties the
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command object of that type has in IR without offsets
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### add
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type | `add`
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value | The number to add to current cell
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property | value
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---------|------
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type | `add`
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value | The number to add to current cell
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Generated on `+` and `-`
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### moveHead
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type | `moveHead`
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value | The number of steps to move the tape head right
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property | value
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---------|------
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type | `add`
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type | `moveHead`
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value | The number of steps to move the tape head right
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Generated on `<` and `>`
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### writeByte
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type | `writeByte`
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property | value
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---------|------
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type | `writeByte`
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Generated on `.`
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### readByte
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type | `readByte`
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property | value
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---------|------
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type | `readByte`
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Generated on `,`
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### loop
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property | value
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---------|------
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type | `loop`
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contents | An array of the commands making up the loop body
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Generated on `[`…`]`
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### clear
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type | `clear`
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property | value
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---------|------
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type | `clear`
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Not generated by the parser directly, but generated by optimizations
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@ -46,27 +59,39 @@ subsection shows the properties the command object of that type has in IR
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with offsets
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### add
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type | `add`
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value | The number to add to the cell
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offfset | The location of the cell relative to current tape position
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property | value
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---------|------
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type | `add`
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value | The number to add to the cell
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offfset | The location of the cell relative to current tape position
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### moveHead
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type | `moveHead`
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value | The number of steps to move the tape head right
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property | value
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---------|------
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type | `moveHead`
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value | The number of steps to move the tape head right
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### writeByte
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type | `writeByte`
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offset | The location of the cell relative to current tape position
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property | value
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---------|------
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type | `writeByte`
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offset | The location of the cell relative to current tape position
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### readByte
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type | `readByte`
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offset | The location of the cell relative to current tape position
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property | value
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---------|------
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type | `readByte`
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offset | The location of the cell relative to current tape position
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### loop
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property | value
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-----------|------
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type | `loop`
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contents | An array of the commands making up the loop body
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isBalanced | Whether execution of the loop body ends in same cell it started in
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### clear
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type | `clear`
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offset | The location of the cell relative to current tape position
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property | value
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---------|------
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type | `clear`
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offset | The location of the cell relative to current tape position
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@ -2,10 +2,10 @@ Gir has three optimization passes.
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joinAdjacentOps
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---------------
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consumes | commands without offsets
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produces | commands without offsets
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unknown commands | passed through unmodified
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acts on | `moveHead`, `add`
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* *consumes*: commands without offsets
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* *produces*: commands without offsets
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* *unknown commands*: passed through unmodified
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* *acts on*: `moveHead`, `add`
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`joinAdjacentOps` joins adjacent `moveHead`s and `add`s together. Normally
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`parse` joins runs of `<>` or `+-` into one command, but if the runs are
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@ -15,20 +15,20 @@ joins `add`s.
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transformClearLoops
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-------------------
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consumes | commands without offsets
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produces | commands without offsets
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unknown commands | passed through unmodified
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acts on | `loop` with one command, which is `add 1` or `add -1`
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* *consumes*: commands without offsets
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* *produces*: commands without offsets
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* *unknown commands*: passed through unmodified
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* *acts on*: `loop` with one command, which is `add 1` or `add -1`
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`transformClearLoops` changes loops of the form `[-]` or `[+]` into a single
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`clear` command.
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addOffsetProperties
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-------------------
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consumes | commands without offsets
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produces | commands with offsets
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unknown commands | raise UnknownIRError
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acts on | `moveHead`, `add`, `clear`, `writeByte`, `readByte`, `loop`
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* *consumes*: commands without offsets
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* *produces*: commands with offsets
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* *unknown commands*: raise UnknownIRError
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* *acts on*: `moveHead`, `add`, `clear`, `writeByte`, `readByte`, `loop`
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`addOffsetProperties` adds an `offset` property to `add`, `clear`,
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`writeByte`, and `readByte`. The `offset` tells the offset at which from the
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